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the observation of light superpartners from a supersymmetric extension to the standard model is an intensely sought-after experimental outcome, providing an explanation for the stabilization of the electroweak scale and indicating the existence of new particles which could be consistent with dark matter phenomenology. ... | sparticles in motion: analyzing compressed susy scenarios with a new method of event reconstruction |
in the supersymmetric models, the coannihilation of the neutralino dm with a lighter supersymmetric particle provides a feasible way to accommodate the observed cosmological dm relic density. such a mechanism predicts a compressed spectrum of the neutralino dm and its coannihilating partner, which results in the soft f... | on the coverage of neutralino dark matter in coannihilations at the upgraded lhc |
we investigate a simple variant of type-ii seesaw, responsible for neutrino mass generation, where the particle spectrum is extended with one singlet right-handed neutrino and an inert higgs doublet, both odd under an additional z2 symmetry. while the role of the dark matter is played by the lightest neutral component ... | scalar triplet flavor leptogenesis with dark matter |
a key assumption of the standard cosmological model is that the temperature of the cosmic microwave background (cmb) radiation scales with cosmological redshift $z$ as $t_{\rm cmb}(z) \propto (1+z)$ at all times after recombination at $z_\star \simeq 1090$. however, this assumption has only been precisely tested at $z ... | did the universe reheat after recombination? |
a search for dijet resonances in events with at least one isolated charged lepton is performed using $139~{\text{fb}}^{-1}$ of $\sqrt{s}=13$ tev proton-proton collision data recorded by the atlas detector at the lhc. the dijet invariant-mass ($m_{jj}$) distribution constructed from events with at least one isolated ele... | search for dijet resonances in events with an isolated charged lepton using $\\sqrt{s} = 13$ tev proton-proton collision data collected by the atlas detector |
we describe the automation of the calculation of perturbative unitarity constraints including scalars that have colour charges, and its release in sarah4.14.4. we apply this, along with vacuum stability constraints, to a simple dark matter model with colourful mediators and interesting decays, and show how it leads to ... | how heavy can dark matter be? constraining colourful unitarity with sarah |
decaying cold dark matter (dcdm) is a model that is currently under investigation regarding primarily the s 8 tension between cosmic microwave background (cmb) and certain large-scale structure measurements. the decay into one massive and one (or more) massless daughter particle(s) leads to a suppression of the power s... | decaying dark matter and lyman-α forest constraints |
a search for dark matter is conducted in events with large missing transverse momentum and a hadronically decaying, lorentz-boosted top quark. this study is performed using proton-proton collisions at a center-of-mass energy of 13 tev, in data recorded by the cms detector in 2016 at the lhc, corresponding to an integra... | search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at √{s}=13 tev |
we present an experimental and theoretical study of hydrodynamic phenomena in a two-component atomic bose-einstein condensate emerging from the imprinting of a periodic spin pattern. by employing a microwave pulse-based winding technique, we prepare a tunable initial state which evolves into an array of solitary waves.... | observation of dense collisional soliton complexes in a two-component bose-einstein condensate |
motivated by the recently proposed trans-planckian censorship conjecture (tcc), we propose a gauged $b-l$ model of inflection-point inflation with axion dark matter. the hubble scale during inflation ($h_{\rm inf}$) satisfies the tcc bound of $h_{\rm inf} \lesssim 1$ gev, the axion dark matter scenario is free from the... | inflection-point inflation with axion dark matter in light of trans-planckian censorship conjecture |
we consider oscillons — localized, quasiperiodic, and extremely long-living classical solutions in models with real scalar fields. we develop their effective description in the limit of large size at finite field strength. namely, we note that nonlinear long-range field configurations can be described by an effective c... | an effective field theory for large oscillons |
we develop an effective field theory (eft) framework for superfluid 4he to model the interactions among quasiparticles, helium atoms and probe particles. our effective field theory approach brings together symmetry arguments and power-counting and matches to classical fluid dynamics. we then present the decay and scatt... | superfluid effective field theory for dark matter direct detection |
postinflationary reheating is a widely discussed mechanism for nonthermal production of dark matter (dm). in this scenario the momentum distribution of the produced dm particles is usually taken to be the one obtained at reheating, redshifted at later times due to the expansion of the universe. however, since in such a... | momentum distribution of dark matter produced in inflaton decay: effect of inflaton mediated scatterings |
we consider inelastic dark matter scenarios with dark photon mediator and a dark higgs boson. the dark higgs boson spontaneously breaks the gauge symmetry associated with the dark photon, and gives the mass to the dark photon and the mass difference to dark particles. such a dark higgs boson can decay into the dark par... | inelastic dark matter from dark higgs boson decays at faser |
the flux of high-energy astrophysical γ rays is attenuated by the production of electron-positron pairs from scattering off of extragalactic background light (ebl). we use the most up-to-date information on galaxy populations to compute their contributions to the pair-production optical depth. we find that the optical ... | seeking dark matter with γ -ray attenuation |
we report on the first belle search for a light c p -odd higgs boson, a0, that decays into low mass dark matter, χ , in final states with a single photon and missing energy. we search for events produced via the dipion transition ϒ (2 s )→ϒ (1 s )π+π- , followed by the on-shell process ϒ (1 s )→γ a0 with a0→χ χ , or by... | search for a light c p -odd higgs boson and low-mass dark matter at the belle experiment |
we study collider signatures of a class of dark matter models with a gev-scale dark z '. at hadron colliders, the production of dark matter particles naturally leads to associated production of the z ', which can appear as a narrow jet after it decays hadronically. contrary to the usual mono-jet signal from initial sta... | dark matter searches with a mono-z' jet |
collective excitations, such as vortex-antivortex and dark solitons, are among the most fascinating effects of macroscopic quantum states. however, two-dimensional (2d) dark solitons are unstable and collapse into vortices due to snake instabilities. making use of the optical bistability in exciton-polariton microcavit... | parallel dark-soliton pair in a bistable two-dimensional exciton-polariton superfluid |
we propose a new class of metastable dark energy (de) phenomenological models in which the de decay rate does not depend on external parameters such as the scalefactor or the curvature of the universe. instead, the de decay rate is assumed to be a constant depending only on intrinsic properties of de and the type of a ... | metastable dark energy with radioactive-like decay |
controls on the degradation of dissolved organic matter (dom) are complex but key to understand the role of freshwaters in the carbon cycle. both the origin and previous degradation history have been suggested to determine dom reactivity, but it is still a major challenge to understand the links between dom composition... | biodegradation kinetics of dissolved organic matter chromatographic fractions in an intermittent river |
the simplest way to create sterile neutrinos in the early universe is by their admixture to active neutrinos. however, this mechanism, connected to the dark matter (dm) problem by dodelson and widrow (dw), cannot simulatenously meet the relic abundance constraint as well as bounds from structure formation and x-rays. n... | dodelson-widrow production of sterile neutrino dark matter with non-trivial initial abundance |
we reanalyze the effective field theory approach for the scenario in which the particles that account for the dark matter (dm) in the universe are vector states that interact only or mainly through the standard model-like higgs boson observed at the lhc. this model-independent and simple approach, with a minimal set of... | the higgs-portal for vector dark matter and the effective field theory approach: a reappraisal |
we derive the shafieloo, hazra, sahni and starobinsky (shss) phenomenological formula for the radioactive-like decay of metastable dark energy directly from the principles of quantum mechanics. to this aim we use the fock-krylov theory of quantum unstable states. we obtain deeper insight on the decay process as having ... | quantum mechanical look at the radioactive-like decay of metastable dark energy |
two-neutrino double electron capture ($2\nu$ecec) is a second-order weak process with predicted half-lives that surpass the age of the universe by many orders of magnitude. until now, indications for $2\nu$ecec decays have only been seen for two isotopes, $^{78}$kr and $^{130}$ba, and instruments with very low backgrou... | first observation of two-neutrino double electron capture in $^{124}$xe with xenon1t |
we discuss collider search strategies of gluinos which are highly degenerate with the lightest neutralino in mass. this scenario is fairly difficult to probe with conventional search strategies at colliders, and thus may provide a hideaway of supersymmetry. moreover, such a high degeneracy plays an important role in da... | cornering compressed gluino at the lhc |
limits on the cross section for weakly interacting massive particles (wimps) elastic scattering on nuclei in nai(tl) detectors at the yangyang underground laboratory are obtained from a 2967.4 kg·day data exposure. the nuclei recoiling from the scattering process are identified by the pulse shape of the scintillation l... | limits on interactions between weakly interacting massive particles and nucleons obtained with nai(tl) crystal detectors |
a search for dark matter produced in association with top quarks in proton-proton collisions at a center-of-mass energy of 13 tev is presented. the data set used corresponds to an integrated luminosity of 35.9 fb-1 recorded with the cms detector at the lhc. whereas previous searches for neutral scalar or pseudoscalar m... | search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √{s}=13 tev |
temporary matter domination and late entropy dilution, injected by a "long-lived" particle in the early universe, serves as a standard mechanism for yielding the correct dark matter relic density. we recently pointed out the cosmological significance of diluting particle's partial decay into dark matter. when repopulat... | anatomy of diluted dark matter in the minimal left-right symmetric model |
we report on the design and performance of the lux-zeplin (lz) "screener", a small liquid scintillator detector consisting of ≈ 23 kg of lab-based gadolinium-loaded liquid scintillator (gdls) to be used in the lz outer detector. the outer detector will be filled with 17.3 tonnes of gdls and will surround the central li... | a liquid scintillation detector for radioassay of gadolinium-loaded liquid scintillator for the lz outer detector |
we discuss the relevance of directional detection experiments in the post-discovery era and propose a method to extract the local dark matter phase space distribution from directional data. the first feature of this method is a parameterization of the dark matter distribution function in terms of integrals of motion, w... | dark matter in 3d |
we study the full-sky distribution of the radio emission from the stimulated decay of axions which are assumed to compose the dark matter in the galaxy. besides the constant extragalactic and cmb components, the decays are stimulated by a galactic radio emission with a spatial distribution that we empirically determine... | on the galactic radio signal from stimulated decay of axion dark matter |
dark matter, if represented by a $z_2$-symmetric scalar field, can manifest as both particles and condensates. in this paper, we study the evolution of an oscillating homogeneous condensate of a $z_2$-symmetric scalar field in a thermal plasma in an flrw universe. we focus on the perturbative regime where the oscillati... | fate of homogeneous $z_2$-symmetric scalar condensates |
parity-time ($\mathcal{pt}$) symmetry has become an important concept in the design of synthetic optical materials, with exotic functionalities such as unidirectional transport and non-reciprocal reflection. at exceptional points, this symmetry is spontaneously broken, and solutions transition from those with conserved... | parity-time symmetry and coherent perfect absorption in a cooperative atom response |
an old neutron star (ns) may capture halo dark matter (dm) and get heated up by the deposited kinetic energy, thus behaving like a thermal dm detector with sensitivity to a wide range of dm masses and a variety of dm-quark interactions. near future infrared telescopes will measure ns temperatures down to a few thousand... | heating neutron stars with gev dark matter |
we explore some experimentally testable predictions of an so(10) axion model which includes two 10-plets of fermions in order to resolve the axion domain wall problem. the axion symmetry can be safely broken after inflation, so that the isocurvature perturbations associated with the axion field are negligibly small. an... | axions, wimps, proton decay and observable r in so(10) |
a multipole decomposition of a cross section is a useful tool to simplify the analysis of reactions due to their symmetry properties. by using a new approach to decompose antisymmetric tensor-type interactions within the multipole analysis, we introduce a general mathematical formalism for working with tensor couplings... | multipole decomposition of tensor interactions of fermionic probes with composite particles and bsm signatures in nuclear reactions |
a scalar field phi endowed with a trigonometric potential has been proposed to play the role of dark matter. a deep study of the cosmological evolution of linear perturbations, and its comparison to the cold dark matter (cdm) and fuzzy dark matter (fdm) cases (scalar field with quadratic potential), reveals an enhancem... | ultralight dm bosons with an axion-like potential: scale-dependent constraints revisited |
we show that very compact axion mini-clusters can form in models where axion-like-particle (alp) dark matter is produced via the kinetic misalignment mechanism, which is well-motivated in pre-inflationary u(1) symmetry breaking scenarios. this is due to alp fragmentation. we predict denser halos than what has been obta... | alp dark matter mini-clusters from kinetic fragmentation |
a search for dark matter particles is performed by looking for events with large transverse momentum imbalance and a recoiling higgs boson decaying to either a pair of photons or a pair of $\tau$ leptons. the search is based on proton-proton collision data at a center-of-mass energy of 13 tev collected at the cern lhc ... | search for dark matter produced in association with a higgs boson decaying to $\\gamma\\gamma$ or $\\tau^+\\tau^-$ at $\\sqrt{s} =$ 13 tev |
we report here methods and techniques for creating an improved model that reproduces the scintillation and ionization response of a dual-phase liquid and gaseous xenon time projection chamber. starting with the recent release of the noble element simulation technique (nest v2.0), electronic recoil data from the β decay... | improved modeling of β electronic recoils in liquid xenon using lux calibration data |
in this paper we analyze a simple scenario in which dark matter (dm) consists of free fermions with mass mf. we assume that on galactic scales these fermions are capable of forming a degenerate fermi gas, in which stability against gravitational collapse is ensured by the pauli exclusion principle. the mass density of ... | dwarf spheroidal galaxies as degenerate gas of free fermions |
we propose a simple model of dark matter and c p violation and consider the associated triple and quadruple productions of 125 gev higgs bosons at the large hadron collider (lhc). in the model, the dark matter is a vectorlike dark fermion (χ ¯ ,χ ) interacting with the standard model only through a complex messenger sc... | simple model of dark matter and c p violation |
we analyse the dynamical properties of three-dimensional solitary waves in cylindrically trapped bose-einstein condensates. families of solitary waves bifurcate from the planar dark soliton and include the solitonic vortex, the vortex ring and more complex structures of intersecting vortex lines known collectively as c... | stability and dispersion relations of three-dimensional solitary waves in trapped bose-einstein condensates |
a search for dark matter produced in association with top quarks in proton-proton collisions at a center-of-mass energy of 13 tev is presented. the data set used corresponds to an integrated luminosity of 35.9 fb$^{-1}$ recorded with the cms detector at the lhc. whereas previous searches for neutral scalar or pseudosca... | search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at $\\sqrt{s} =$ 13 tev |
we present a new paradigm, asymptotic grand unification, where the gauge couplings run to a unique fixed point in the ultraviolet, without supersymmetry and without quantitative unification at any given scale. we introduce a minimal model based on an su(5) gauge theory in a compact s1/(z2×z2') orbifold. by construction... | minimal su(5) asymptotic grand unification |
a measurement of hafnium foil using a modified ultra-low-background high purity detector with optimized sample-to-detector geometry was performed at laboratori nazionale del gran sasso. radiopurity of the stock hf foil was studied in detail, in addition to an analysis of data collected over 310 days to search for rare ... | a search for rare and induced nuclear decays in hafnium |
we explore beta decays in a dark background field, which could be formed by dark matter, dark energy or a fifth force potential. in such scenarios, the neutrino's dispersion relation will be modified by its collective interaction with the dark field, which can have interesting consequences in experiments using tritium ... | tritium beta decay with modified neutrino dispersion relations: katrin in the dark sea |
if the early universe is dominated by an energy density which evolves other than radiation-like the normal hubble-temperature relation hpropto t2 is broken and dark matter relic density calculations in this era can be significantly different. we first highlight that with a population of states phi sourcing an initial e... | establishing the dark matter relic density in an era of particle decays |
we explore the suggestion that the neutron lifetime puzzle might be resolved by neutrons decaying into dark matter through the process, n → χ χ χ, with χ having a mass one-third of the neutron. in particular, we examine the consequences of such a decay mode for the properties of neutron stars. unlike an earlier suggest... | novel neutron decay mode inside neutron stars |
we propose a cosmological scenario involving a scalar field, varphi, that is a source of dark matter as well as of dark energy. besides varphi, the lagrangian of the field theory envisaged in our scenario contains a second field χ, for simplicity assumed to be a scalar, too. for fixed values of χ, the potential term de... | new scalar field quartessence |
we propose a pseudo-nambu-goldstone boson (pngb) dark matter (dm) model based on an additional non-abelian gauge symmetry s u (2 )d. the gauge symmetry s u (2 )d is spontaneously broken to a global custodial symmetry u (1 )v via the nonvanishing vacuum expectation values of s u (2 )d doublet and triplet scalar fields. ... | pseudo-nambu-goldstone dark matter from non-abelian gauge symmetry |
we study mono-w signals of dark matter (dm) production at the lhc, in the context of gauge invariant renormalizable models. we analyze two simplified models, one involving an s-channel z' mediator and the other a t-channel colored scalar mediator, and consider examples in which the dm-quark couplings are either isospin... | mono-w dark matter signals at the lhc: simplified model analysis |
we study a class of realizations of the next-to-minimal supersymmetric standard model that is motivated by dark matter and higgs data, and in which the lightest pseudoscalar higgs boson mass is smaller than twice the bottom quark mass and greater than twice the tau lepton mass. in such scenarios, the lightest pseudosca... | investigating light nmssm pseudoscalar states with boosted ditau tagging |
we study the effect of the early kinetic decoupling in a model of fermionic dark matter (dm) that interacts with the standard model particles only by exchanging the higgs boson. there are two dm-higgs couplings, namely c p -conserving and c p -violating couplings. if the mass of the dm is slightly below half of the hig... | effect of the early kinetic decoupling in a fermionic dark matter model |
we study cosmology with running dark energy. the energy density of dark energy is obtained from the quantum process of transition from the false vacuum state to the true vacuum state. we use the breit-wigner energy distribution function to model the quantum unstable systems and obtain the energy density of the dark ene... | cosmological implications of the transition from the false vacuum to the true vacuum state |
we investigate dynamical self-friction, the process by which material that is stripped from a subhalo torques its remaining bound remnant, which causes it to lose orbital angular momentum. by running idealized simulations of a subhalo orbiting within an analytical host halo potential, we isolate the effect of self-fric... | dynamical self-friction: how mass loss slows you down |
we study a simple model of vector dark matter that couples to standard model particles via magnetic dipole interactions. in this scenario, the cosmological abundance arises through the freeze-in mechanism and depends on the dipole coupling, the vector mass, and the reheat temperature. to ensure cosmological metastabili... | freezing in vector dark matter through magnetic dipole interactions |
1. introduction; 2. relativistic notation, lagrangians, and interactions; 3. gauge invariance; 4. non-abelian gauge theories; 5. dirac notation for spin; 6. the standard model lagrangian; 7. the electroweak theory and quantum chromodynamics; 8. masses and the higgs mechanism; 9. cross sections, decay widths, and lifeti... | modern elementary particle physics |
in this paper, we investigate the behavior of cosmologies in homogeneous and isotropic background with a barotropic fluid. we solve the continuity equation and study several aspects of model including behavior of cosmological quantities like hubble parameter, deceleration parameter, equation of state parameter along wi... | lagrangian formulation and implications of barotropic fluid cosmologies |
the distribution and fate of coloured dissolved organic matter (cdom) in the epipelagic eastern north atlantic was investigated during a cruise in the summer 2009 by combining field observations and culture experiments. dissolved organic carbon (doc) and nitrogen (don), the absorption spectra of cdom and the fluorescen... | production and degradation of fluorescent dissolved organic matter in surface waters of the eastern north atlantic ocean |
in supersymmetric axion models, if the gravitino or axino is the lightest susy particle (lsp), the other is often the next-to-lsp (nlsp). we investigate the cosmology of such a scenario and point out that the lifetime of the nlsp naturally becomes comparable to the present age of the universe in a viable parameter regi... | gravitino/axino as decaying dark matter and cosmological tensions |
we discuss the possibility to predict the qcd axion mass in the context of grand unified theories. we investigate the implementation of the dfsz mechanism in the context of renormalizable su(5) theories. in the simplest theory, the axion mass can be predicted with good precision in the range $m_a = (2-16)$ nev, and the... | axion dark matter, proton decay and unification |
the recent discovery of the unidentified emission line at 3.5 kev in galaxies and clusters has attracted great interest from the community. as the origin of the line remains uncertain, we study the surface brightness distribution of the line in the perseus cluster since that information can be used to identify its orig... | radial profile of the 3.5 kev line out to r200 in the perseus cluster |
narrow-band invisibility in an otherwise opaque medium has been achieved by electromagnetically induced transparency (eit) in atomic systems. the quantum eit behavior can be classically mimicked by specially engineered metamaterials via carefully controlled interference with a "dark mode." however, the narrow transpare... | tunable broadband transparency of macroscopic quantum superconducting metamaterials |
we examine a scenario for freeze-in production of dark matter, which occurs due to the large thermal correction to the mass of a decaying mediator particle present in the thermal bath of the early universe. we show that the decays, which are kinematically forbidden otherwise, can open up at very high temperatures and d... | freeze-in dark matter through forbidden channel in u(1) b-l |
a renormalizable uv model for axionlike particles or hidden photons, which may explain the dark matter, usually involves a dark higgs field, which is a singlet under the standard model (sm) gauge group. the dark sector can couple to the sm particles via the portal coupling between the sm-like higgs and dark higgs field... | probing a light dark sector at future lepton colliders via invisible decays of the sm-like and dark higgs bosons |
we derive in detail the orbital period loss of a compact binary system in presence of a fifth force and radiation of ultralight particles for a general eccentric keplerian orbit. we obtain constraints on fifth force strength $\alpha\lesssim 1.11\times 10^{-3}$ from the orbital period decay of compact binary systems. we... | listening to dark sirens from gravitational waves:\\it{combined effects of fifth force, ultralight particle radiation, and eccentricity} |
the physics of the electronic excitation in semiconductors induced by sub-gev dark matter (dm) have been extensively discussed in literature, under the framework of the standard plane wave (pw) and pseudopotential calculation scheme. in this paper, we investigate the implication of the all-electron (ae) reconstruction ... | the wavefunction reconstruction effects in calculation of dm-induced electronic transition in semiconductor targets |
a search for new physics in events with a z boson produced in association with large missing transverse momentum at the lhc is presented. the search is based on the 2016 data sample of proton-proton collisions recorded with the cms experiment at √{s} = 13 {tev} , corresponding to an integrated luminosity of 35.9 {fb}^{... | search for new physics in events with a leptonically decaying z boson and a large transverse momentum imbalance in proton-proton collisions at √{s} = 13 {tev} |
the formation and decay of dark matter (dm) bound states deplete the thermal relic density during the chemical decoupling process, allowing for larger dm masses. while so far the bound state formation (bsf) has been described via the emission of an on-shell mediator, we point out that this particular process does not h... | rapid bound state formation of dark matter in the early universe |
a search for dijet resonances in events with at least one isolated charged lepon is performed using 139 fb-1 of √{s } = 13 tev proton-proton collision data recorded by the atlas detector at the lhc. the dijet invariant-mass (mjj) distribution constructed from events with at least one isolated electron or muon is search... | search for dijet resonances in events with an isolated charged lepton using √{s } = 13 tev proton-proton collision data collected by the atlas detector |
we consider dark matter consisting of long-living particles with masses 107 gev ≲ m ≲1016 gev decaying through hadronic channel as a source of high-energy neutrino. using recent data on high-energy neutrino from icecube and pierre auger experiments, we derive the upper-limits on neutrino flux from dark matter decay and... | hadronically decaying heavy dark matter and high-energy neutrino limits |
a model of high scale inflation is presented where the radial part of the peccei-quinn (pq) field with a non-minimal coupling to gravity plays the role of the inflaton, and the qcd axion is the dark matter. a quantum fluctuation of o (h /2 π ) in the axion field will result in a smaller angular fluctuation if the pq fi... | unifying inflation and dark matter with the peccei-quinn field: observable axions and observable tensors |
the search for a dark photon produced at e+e- colliders which subsequently decays into inelastic dark matter particles, is discussed. the heavier dark matter decays into a pair of visible charged particles and a lighter dark matter particle after traveling some distance. the visible decay products can be recorded by a ... | search for dark photon and dark matter signatures around electron-positron colliders |
the field of particle physics is living very exciting times with a plethora of experiments looking for new physics in complementary ways. this has made increasingly necessary to obtain precise predictions in new physics models in order to be ready for a discovery that might be just around the corner. however, analyzing... | computer tools in particle physics |
the bright scintillation of pure csi operated at liquid-nitrogen temperature makes of this material a promising dark matter and neutrino detector. we present the first measurement of its quenching factor for nuclear recoils. our findings indicate it is indistinguishable from that for sodium-doped csi at room temperatur... | response of undoped cryogenic csi to low-energy nuclear recoils |
this paper presents a statistical combination of searches targeting final states with two top quarks and invisible particles, characterised by the presence of zero, one or two leptons, at least one jet originating from a b-quark and missing transverse momentum. the analyses are searches for phenomena beyond the standar... | constraints on spin-0 dark matter mediators and invisible higgs decays using atlas 13 tev pp collision data with two top quarks and missing transverse momentum in the final state |
we study cosmological effects of explicit peccei-quinn breaking on the qcd axion dark matter. we find that the axion abundance decreases or increases significantly depending on the initial position, even for a tiny peccei-quinn breaking that satisfies the experimental bound of the neutron electric dipole measurements. ... | cosmological effects of peccei-quinn symmetry breaking on qcd axion dark matter |
the inclusion of a period of (effective) matter domination following inflation and prior to the onset of radiation domination has interesting and observable consequences for structure growth. during this early matter-dominated era (emde), the universe was dominated by massive particles, or an oscillating scalar field, ... | constraining nonthermal dark matter's impact on the matter power spectrum |
we demonstrate a common origin for high-scale leptogenesis and three-loop neutrino mass generation. specifically we extend the standard model by two real singlet scalars, two singly charged scalars carrying different quantum numbers under certain global symmetry and two or more singlet fermions with majorana masses. th... | high-scale leptogenesis with three-loop neutrino mass generation and dark matter |
the high energy events observed at the icecube neutrino observatory have triggered many investigations interpreting the highly energetic neutrinos detected as decay products of heavy unstable dark matter particles. however, while very detailed treatments of the icecube phenomenology exist, only a few references focus o... | a consistent theory of decaying dark matter connecting icecube to the sesame street |
a search for dark matter is conducted in events with large missing transverse momentum and a hadronically decaying, lorentz-boosted top quark. this study is performed using proton-proton collisions at a center-of-mass energy of 13 tev, in data recorded by the cms detector in 2016 at the lhc, corresponding to an integra... | search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at $\\sqrt{s}=$ 13 tev |
this article reports on a search for dark matter pair production in association with a higgs boson decaying to a pair of bottom quarks, using data from $20.3 fb^{-1}$ of $pp$ collisions at a center-of-mass energy of 8 tev collected by the atlas detector at the lhc. the decay of the higgs boson is reconstructed as a hig... | search for dark matter produced in association with a higgs boson decaying to two bottom quarks in $pp$ collisions at $\\sqrt{s} = 8$ tev with the atlas detector |
we demonstrate the feasibility of generation of quasi-stable counter-propagating solitonic structures in an atomic bose-einstein condensate confined in a realistic toroidal geometry, and identify optimal parameter regimes for their experimental observation. using density engineering we numerically identify distinct reg... | engineering dark solitary waves in ring-trap bose-einstein condensates |
the muon g -2 anomaly was strengthened by recent experimental results at fermilab, which may be signatures of new physics. a scenario of leptophilic scalar ϕl accounting for the muon g -2 anomaly is investigated in this paper. although a light ϕl mainly decaying into standard model (sm) particles has been excluded by e... | a dark leptophilic scalar with the updated muon g -2 anomaly |
heat and noise control is essential for the continued development of quantum technologies. for this purpose, a particularly powerful tool is the heat rectifier, which allows for heat transport in one configuration of two baths but not the reverse. here we propose a class of rectifiers that exploits the unidirectionalit... | dark-state-induced heat rectification |
a higgs portal in the form of the operator |h|2 provides a minimal and theoretically motivated link between the standard model (sm) and new physics. while higgs portals can be constrained well by exotic higgs decays if the beyond-the-sm states are light, testing scenarios where these particles are kinematically inacces... | probing higgs portals with matrix-element based kinematic discriminants in zz → 4ℓ production |
the origin of life, based on the homochirality of biomolecules, is a persistent mystery. did life begin by using both forms of chirality, and then one of the forms disappeared? or did the choice of homochirality precede the formation of biomolecules that could ensure replication and information transfer? is the natural... | chirality and the origin of life |
two-dimensional (2d) heterostructure with atomically sharp interface holds promise for future electronics and optoelectronics because of their multi-functionalities. here we demonstrate gate-tunable rectifying behavior and self-powered photovoltaic characteristics of novel p-gese/n-mose2 van der waal heterojunction (vd... | nir self-powered photodetection and gate tunable rectification behavior in 2d gese/mose2 heterojunction diode |
motivated by the difficulty of constructing de sitter vacua in string theory, a new approach was proposed in arxiv:1807.01570 and arxiv:1907.04268, where four dimensional de sitter space was realized as the effective cosmology, with matter and radiation, on an expanding spherical bubble that mediates the decay of non s... | dark bubbles: decorating the wall |
we update the parameter spaces for both a real and complex scalar dark matter via the higgs portal. in the light of constraints arising from the lux 2016 data, the latest higgs invisible decay and the gamma ray spectrum, the dark matter resonant mass region is further restricted to a narrow window between 54.9-62.3 gev... | scalar dark matter: real vs complex |
we report an experimental study of temperature-dependent spectral line shapes of phonon sideband emission stemming from dark excitons in monolayer and bilayer wse2. using photoluminescence spectroscopy in the range from 4 to 100 k, we observe a pronounced asymmetry in the phonon-assisted luminescence from momentum-indi... | spectral asymmetry of phonon sideband luminescence in monolayer and bilayer wse2 |
we study phenomenology of electroweak-interacting fermionic dark matter (dm) with a mass of o (100) gev. constructing the effective lagrangian that describes the interactions between the higgs boson and the su (2)l isospin multiplet fermion, we evaluate the electric dipole moment (edm) of electron, the signal strength ... | effective interaction of electroweak-interacting dark matter with higgs boson and its phenomenology |
observables sensitive to the anomalous production of events containing hadronic jets and missing momentum in the plane transverse to the proton beams at the large hadron collider are presented. the observables are defined as a ratio of cross sections, for events containing jets and large missing transverse momentum to ... | measurement of detector-corrected observables sensitive to the anomalous production of events with jets and large missing transverse momentum in $pp$ collisions at $\\sqrt{s} = 13$ tev using the atlas detector |
we propose a simple mechanism for copiously producing heavy higgs bosons with enhanced decay rates to two photons at the lhc, within the context of the minimal supersymmetric extension of the standard model (mssm). in the cp-conserving limit of the theory, such a diphoton resonance may be identified with the heavier cp... | enhanced rates for diphoton resonances in the mssm |
we propose a simple way to extract particle masses given a displaced vertex signature in event topologies where two long-lived mother particles decay to visible particles and an invisible daughter. the mother could be either charged or neutral and the neutral daughter could correspond to a dark matter particle in diffe... | reconstructing particle masses in events with displaced vertices |
a search is presented for dark matter produced in association with a hadronically decaying w or z boson using 3.2 fb-1 of pp collisions at √{ s} = 13 tev recorded by the atlas detector at the large hadron collider. events with a hadronic jet compatible with a w or z boson and with large missing transverse momentum are ... | search for dark matter produced in association with a hadronically decaying vector boson in pp collisions at √{ s} = 13 tev with the atlas detector |
the first search for supersymmetry in events with an experimental signature of one soft, hadronically decaying $\tau$ lepton, one energetic jet from initial-state radiation, and large transverse momentum imbalance is presented. these event signatures are consistent with direct or indirect production of scalar $\tau$ le... | search for supersymmetry with a compressed mass spectrum in events with a soft $\\tau$ lepton, a highly energetic jet, and large missing transverse momentum in proton-proton collisions at $\\sqrt{s} =$ 13 tev |
in this paper, we study friedmann cosmology with time-varying vacuum energy density in the context of brans-dicke theory. we consider an isotropic and homogeneous flat space, filled with a matter-dominated perfect fluid and a dynamical cosmological term λ (t ) , obeying the equation of state of the vacuum. as the exact... | friedmann cosmology with decaying vacuum density in brans-dicke theory |
we develop a general quantum theory of the coupled plasmonic modes resulting from the near-field interaction between localized surface plasmons in a heterogeneous metallic nanoparticle dimer. in particular, we provide analytical expressions for the frequencies and decay rates of the bright and dark plasmonic modes. we ... | decay of dark and bright plasmonic modes in a metallic nanoparticle dimer |
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