abstract stringlengths 3 192k | title stringlengths 4 857 |
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we study the finite time entanglement dynamics between two dark-soliton qubits due to quantum fluctuations in quasi-one-dimensional bose-einstein condensates. recently, dark solitons are proved to be an appealing platform for qubits due to their appreciably long lifetime. we explore the entanglement decay for an entang... | entanglement sudden death and revival in quantum dark-soliton qubits |
we present a minimal grand unified theory model, based on s u (5 ) gauge symmetry and a global u (1 ) peccei-quinn symmetry, that predicts the existence of an ultralight axion dark matter within a narrow mass range of ma∈[0.1 ,4.7 ] nev . this mass window is determined through an interplay between gauge coupling unific... | fully testable axion dark matter within a minimal s u (5 ) gut |
a search for dark matter produced in association with a higgs boson decaying to a pair of bottom quarks is performed in proton-proton collisions at a center-of-mass energy of 13 tev collected with the cms detector at the lhc. the analyzed data sample corresponds to an integrated luminosity of 35.9 fb$^{-1}$. the signal... | search for dark matter produced in association with a higgs boson decaying to a pair of bottom quarks in proton-proton collisions at $\\sqrt{s} =$ 13 tev |
the supersymmetrized dfsz axion model is especially compelling in that it contains 1. the susy solution to the gauge hierarchy problem, 2. the peccei-quinn (pq) solution to the strong cp problem and 3. the kim-nilles solution to the susy μ problem. in a string setting, where a discrete r-symmetry (z24r for example) may... | dark matter and dark radiation from the early universe with a modulus coupled to the pqmssm |
a large number of studies, all using bayesian parameter inference from markov chain monte carlo methods, have constrained the presence of a decaying dark matter component. all such studies find a strong preference for either very long-lived or very short-lived dark matter. however, in this paper, we demonstrate that th... | decaying dark matter with profile likelihoods |
a search for heavy resonances, decaying into the standard model vector bosons and the standard model higgs boson, is presented. the final states considered contain a b quark-antiquark pair from the decay of the higgs boson, along with electrons and muons and missing transverse momentum, due to undetected neutrinos, fro... | search for heavy resonances decaying into a vector boson and a higgs boson in final states with charged leptons, neutrinos and b quarks at $\\sqrt{s} =$ 13 tev |
it is shown that in extensions of the standard model of quarks and leptons where the additive lepton number l is broken by two units, so that z2 lepton parity, i.e., (-1 )l which is either even or odd, remains exactly conserved, there is the possibility of stable dark matter without additional symmetry. this applies to... | derivation of dark matter parity from lepton parity |
dark matter stability can result from a residual matter-parity symmetry, following naturally from the spontaneous breaking of the gauge symmetry. here we explore this idea in the context of the su(3)c ⊗ su(3)l ⊗ u(1)x ⊗ u(1)n electroweak extension of the standard model. the key feature of our new scotogenic dark matter... | a theory for scotogenic dark matter stabilised by residual gauge symmetry |
the discovery of diffuse sub-pev gamma-rays by the tibet as$_\gamma$ collaboration promises to revolutionize our understanding of the high-energy astrophysical universe. it has been shown that these data broadly agree with prior theoretical expectations. we study the impact of this discovery on a well-motivated new phy... | search for dark matter using sub-pev $\\boldsymbol{\\gamma}$-rays observed by tibet as$_{\\boldsymbol{\\gamma}}$ |
in this article we show that in the usual type-i seesaw framework, augmented solely by a neutrino portal interaction, the dark matter (dm) relic density can be created through freeze-in, in a manner fully determined by the seesaw interactions and the dm particle mass. this simple freeze-in scenario, where dark matter i... | seesaw neutrino determination of the dark matter relic density |
sabre (sodium-iodide with active background rejection) is a new nai(tl) experiment designed to test the dama/libra claim for a positive wimp-dark matter annual modulation signal. sabre will consist of highly pure nai(tl) crystals in an active liquid scintillator veto that will be placed deep underground. the scintillat... | sabre: a new nai(t1) dark matter direct detection experiment |
the baryon asymmetry of the universe may be explained by rotations of the qcd axion in field space and baryon number violating processes. we consider the minimal extension of the standard model by a non-abelian gauge interaction, su(2)r, whose sphaleron process violates baryon number. assuming that axion dark matter is... | axiogenesis from su(2)r phase transition |
we introduce the concept of dark space phase transition, which may occur in open many-body quantum systems where irreversible decay, interactions, and quantum interference compete. our study is based on a quantum many-body model that is inspired by classical nonequilibrium processes which feature phase transitions into... | nonequilibrium dark space phase transition |
we investigate the cosmological evolution of a mimetic matter model with arbitrary scalar potential. the cosmological reconstruction—which is the method for constructing a model for an arbitrary evolution of the scale factor—is explicitly performed for different choices of potential. the cases where the mimetic matter ... | cosmological perturbations in a mimetic matter model |
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 $\sqrt{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 $\\sqrt{s} $ = 13 tev |
we study the inert higgs doublet model and its inert scalar higgs $h$ as the only source for dark matter. it is found that three mass regions of the inert scalar higgs can give the correct dark matter relic density. the low mass region (between 3 and 50 gev) is ruled out. new direct dark matter detection experiments wi... | constraints to dark matter from inert higgs doublet model |
recently anomalous flux in the cosmic optical background (cob) is reported by the new horizon observations. the cob flux is 16.37 ±1.47 n wm−2 sr−1 , at the lorri pivot wavelength of 0.608 μ m , which is ∼4 σ level above the expected flux from the hubble space telescope (hst) galaxy count. it would be great if this wer... | anisotropic cosmic optical background bound for decaying dark matter in light of the lorri anomaly |
we studied the spin depolarization of ensembles of nitrogen-vacancy (nv) centers in nitrogen-rich single-crystal diamonds. we found a strong dependence of the evolution of the polarized state in the dark on the concentration of nv centers. at low excitation power, we observed a simple exponential decay profile in the l... | coupled charge and spin dynamics in high-density ensembles of nitrogen-vacancy centers in diamond |
we test the origin of the 3.5 kev line photons by analyzing the morphology of the emission at that energy from the galactic center and from the perseus cluster of galaxies. we employ a variety of different templates to model the continuum emission and analyze the resulting radial and azimuthal distribution of the resid... | where do the 3.5 kev photons come from? a morphological study of the galactic center and of perseus |
we make a comprehensive study of vector-like fermionic dark matter and flavor anomalies in a simple extension of standard model. the model is added with doublet vector-like fermions of quark and lepton types, and also a $s_1(\bar{\textbf{3}},\textbf{1},1/3)$ scalar leptoquark. an additional lepton type singlet fermion ... | dark matter and flavor anomalies in the light of vector-like fermions and scalar leptoquark |
nucleon decays are generic predictions of motivated theories, including those based on the unification of forces and supersymmetry. we demonstrate that non-canonical nucleon decays offer a unique opportunity to broadly probe light new particles beyond the standard model with masses below $\sim$few gev over decades in m... | non-canonical nucleon decays as window into light new physics |
we study a lepton-flavored dark matter model and its signatures at a future muon collider. we focus on the less-explored regime of feeble dark matter interactions, which suppresses the dangerous lepton-flavor violating processes, gives rise to dark matter freeze-in production, and leads to long-lived particle signature... | a duet of freeze-in and freeze-out: lepton-flavored dark matter and muon colliders |
a new understanding of the stability of self-interacting dark matter is pointed out, based on the simplest spontaneously broken abelian u (1) gauge model with one complex scalar and one dirac fermion. the key is the imposition of dark charge conjugation symmetry. it allows the possible existence of two stable particles... | inception of self-interacting dark matter with dark charge conjugation symmetry |
we study the cosmological consequences of codecaying dark matter—a recently proposed mechanism for depleting the density of dark matter through the decay of nearly degenerate particles. a generic prediction of this framework is an early dark matter dominated phase in the history of the universe, that results in the enh... | concentrated dark matter: enhanced small-scale structure from codecaying dark matter |
we constrain the higgs-portal model employing the vector-boson fusion channel at the lhc. in particular, we include the phenomenologically interesting parameter region near the higgs resonance, where the higgs-boson mass is close to the threshold for dark-matter production and a running-width prescription has to be emp... | probing higgs-portal dark matter with vector-boson fusion |
proton beam dumps are prolific sources of mesons enabling a powerful technique to search for vector mediator coupling of dark matter to neutral pion and higher mass meson decays. by the end of the decade the pip-ii linac will be delivering up to 1 mw of proton power to the fnal campus. this includes a significant incre... | sbn-bd: $\\mathcal{o}$(10 gev) proton beam dump at fermilab's pip-ii linac |
in minimal supersymmetric su(5) models, the proton can decay through dimension 5 operators. since this decay depends directly on the supersymmetric soft masses, it will be constrained by other observables which depend on the soft masses, such as the higgs mass and the dark matter relic density. in this work, we will ex... | upper limit on the proton lifetime in minimal supersymetric su(5) |
we study the nonequilibrium dynamics of axionlike particles (alp) coupled to standard model degrees of freedom in thermal equilibrium. the quantum master equation (qme) for the alp reduced density matrix is derived to leading order in the coupling of the alp to the thermal bath, but to all orders of the bath couplings ... | nonequilibrium dynamics of axionlike particles: the quantum master equation |
we test a novel idea of using a π- beam in the fixed-target experiments to search for new physics in the events with missing energy. bounds for invisible vector ρ meson decay were derived, analyzed, and compared with the current limits on searching dark matter in the accelerator based experiments. we demonstrate that t... | probing invisible vector meson decay mode with the hadronic beam in the na64 experiment at sps cern |
we present a detailed study of a scotogenic model accommodating dark matter, neutrino masses and the anomalous magnetic moment of the muon while being consistent with the existing constraints on flavour violating decays of the leptons. moreover, this model offers the possibility to explain the baryon asymmetry of the u... | accommodating muon (g − 2) and leptogenesis in a scotogenic model |
we present here a characterization of the low background nai(tl) crystal nai-33 based on a period of almost one year of data taking (891 kg×days exposure) in a detector configuration with no use of organic scintillator veto. this remarkably radio-pure crystal already showed a low background in the sabre proof-of-princi... | performance of the sabre detector module in a purely passive shielding |
a search is performed for events consistent with the pair production of a new heavy particle that acts as a mediator between a dark sector and normal matter, and that decays to a light quark and a new fermion called a dark quark. the search is based on data corresponding to an integrated luminosity of 16.1 fb-1 from pr... | search for new particles decaying to a jet and an emerging jet |
the xenon1t experiment aims for the direct detection of dark matter in a detector filled with 3.3 tons of liquid xenon. in order to achieve the desired sensitivity, the background induced by radioactive decays inside the detector has to be sufficiently low. one major contributor is the β -emitter ^{85}kr which is prese... | removing krypton from xenon by cryogenic distillation to the ppq level |
prerecombination acoustic oscillations induce nonadiabatic perturbations between baryons and dark matter, corresponding to a constant relative-density δb c and decaying relative-velocity perturbation vb c . due to their significant large-scale correlations and prominent baryon acoustic oscillation (bao) features, these... | effect of relative velocity and density perturbations between baryons and dark matter on the clustering of galaxies |
we consider decaying dark matter with masses 1 07≲m ≲1 016 gev as a source of ultrahigh energy (uhe) gamma rays. using recent limits on uhe gamma-ray flux for energies eγ>2 ×1 014 ev , provided by extensive air shower observatories, we put limits on masses and lifetimes of the dark matter. we also discuss possible d... | constraining heavy decaying dark matter with the high energy gamma-ray limits |
a search is presented for dark matter produced in association with a hadronically decaying w or z boson using 3.2 /fb of pp collisions at $\sqrt{s}$=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 ar... | search for dark matter produced in association with a hadronically decaying vector boson in pp collisions at $\\sqrt{s}$=13 tev with the atlas detector |
this paper describes a search for events with one top-quark and large missing transverse momentum in the final state. data collected during 2015 and 2016 by the atlas experiment from 13 tev proton-proton collisions at the lhc corresponding to an integrated luminosity of 36.1 fb-1 are used. two channels are considered, ... | search for large missing transverse momentum in association with one top-quark in proton-proton collisions at √{s} = 13 tev with the atlas detector |
while the higgs characterisation programme is well under way, direct signs for new physics beyond the standard model remain elusive. performing a fit of fully differential higgs production cross sections at the lhc to a subset of higgs-relevant effective operators, we discuss the extent to which theoretical uncertainti... | higgs characterisation in the presence of theoretical uncertainties and invisible decays |
we perform a combined likelihood analysis for the icecube 6-year high-energy starting events (hese) above 60 tev and 8-year throughgoing muon events above 10 tev using a two-component neutrino flux model. the two-component flux can be motivated either from purely astrophysical sources or due to a beyond standard model ... | a combined astrophysical and dark matter interpretation of the icecube hese and throughgoing muon events |
we explore the dirac fermionic and complex scalar dark matter in the framework of a hidden u (1 )x gauge theory with kinetic mixing between the u (1 )x and u (1 )y gauge fields. the u (1 )x gauge symmetry is spontaneously broken due to a hidden higgs field. the kinetic mixing provides a portal between dark matter and s... | fermionic and scalar dark matter with hidden u(1) gauge interaction and kinetic mixing |
we investigate constraints on some key cosmological parameters by confronting metastable dark energy (de) models with different combinations of the most recent cosmological observations. along with the standard λcdm model, two phenomenological metastable de models are considered: (i) de decays exponentially, (ii) de de... | revisiting metastable dark energy and tensions in the estimation of cosmological parameters |
recently, the atlas and cms collaborations report excesses around 750 gev in the diphoton channels. this might be the evidence which reveals new physics beyond the standard model. in this paper, we consider models with a 750 gev scalar and vectorlike particles, which couple each other through yukawa couplings. the deca... | diphoton excess at 750 gev and lhc constraints in models with vectorlike particles |
we show that the present dark matter abundance can be accounted for by an oscillating scalar field that acquires both mass and a non-zero expectation value from interactions with the higgs field. the dark matter scalar field can be sufficiently heavy during inflation, due to a non-minimal coupling to gravity, so as to ... | scalar field dark matter with spontaneous symmetry breaking and the 3.5 kev line |
as we have pointed out in (arxiv:arxiv:1806.10107 [hep-ph]), the existence of neutron dark matter decay modes n → χ + anything, where χ is a dark matter fermion, for the solution of the neutron lifetime problem changes priorities and demands to describe the neutron lifetime τn = 888.0 (2.0) s, measured in beam experime... | neutron dark matter decays and correlation coefficients of neutron β--decays |
we propose a complete cosmological scenario based on a flipped su (5) × u (1) gut model that incorporates starobinsky-like inflation, taking the subsequent cosmological evolution carefully into account. a single master coupling, λ6, connects the singlet, gut higgs and matter fields, controlling 1) inflaton decays and r... | cosmology with a master coupling in flipped su(5)×u(1): the λ6 universe |
we propose a two-component dark matter explanation to the edges 21 cm anomalous signal. the heavier dark matter component is long-lived, and its decay is primarily responsible for the relic abundance of the lighter dark matter, which is millicharged. to evade the constraints from cmb, underground dark matter direct det... | two-component millicharged dark matter and the edges 21 cm signal |
we consider the freeze-in production of 7 kev axino dark matter (dm) in the supersymmetric dine-fischler-srednicki-zhitnitsky (dfsz) model in light of the 3.5 kev line excess. the warmness of such 7 kev dm produced from the thermal bath, in general, appears in tension with ly-α forest data, although a direct comparison... | light axinos from freeze-in: production processes, phase space distributions, and ly-α forest constraints |
we study the stochastic axion dark matter scenario in the axion landscape, where one of the axions is light and stable and therefore explains dark matter. if the axion mass at the potential is a typical value of the curvature along the direction, the potential can be well approximated by a quadratic mass term. on the o... | stochastic axion dark matter in axion landscape |
we consider the kaluza-klein (kk) graviton and its decays in the presence of the light radion, the modulus of extra dimension, appearing naturally light due to classical scale invariance in warped gravity. due to the presence of a sizable wave function overlap in the extra dimension between the kk graviton and the radi... | kk graviton resonance and cascade decays in warped gravity |
the simplest extension of the standard model by only one real singlet scalar can explain the observed dark matter relic density while giving simultaneously a strongly first-order electroweak phase transition in the early universe. however, after imposing the invisible higgs decay constraint from the lhc, the parameter ... | a simultaneous study of dark matter and phase transition: two-scalar scenario |
a long-standing kinematic challenge in data analysis at hadron colliders is the determination of the masses of invisible particles. this issue is particularly relevant in searches for evidence of dark matter production, which remains one of the prominent targets of future collider experiments. in this paper, we show th... | timing information at hl-lhc: complete determination of masses of dark matter and long lived particle |
we report a stable magnetic domain wall in a uniform ferromagnetic spin-1 condensate, characterized by the magnetization having a dark soliton profile with nonvanishing superfluid density. we find exact stationary solutions for a particular ratio of interaction parameters with and without magnetic fields, and develop a... | dark-soliton-like magnetic domain walls in a two-dimensional ferromagnetic superfluid |
a review of the higgs portal-vector dark matter interpretation of the spin-independent dark-matter nucleon elastic scattering cross section is presented, where the invisible higgs decay width measured at the lhc is used. effective field theory and ultraviolet complete models are discussed. lhc interpretations show only... | higgs portal vector dark matter interpretation: review of effective field theory approach and ultraviolet complete models |
the recently proposed trans-planckian censorship conjecture (tcc) amounts to the claim that inflation models with an inflationary energy scale larger than λinfmax ∼109gev belong to the swampland, i.e., cannot be embedded into a consistent theory of quantum gravity. in this paper, we point out that this constraint can b... | trans-planckian censorship and inflation in grand unified theories |
when the singlet-doublet fermion dark matter model is extended with additional z2-odd real singlet scalars, neutrino masses and mixings can be generated at the one-loop level. in this work, we discuss the salient features arising from the combination of the two resulting simplified dark matter models. when the lightest... | radiative neutrino masses in the singlet-doublet fermion dark matter model with scalar singlets |
it has been recently suggested [z. berezhiani, a. d. dolgov, and i. i. tkachev, phys. rev. d 92, 061303 (2015)] that emerging tension between cosmological parameter values derived in high-redshift (cmb anisotropy) and low-redshift (cluster counts, hubble constant) measurements can be reconciled in a model which contain... | dark matter component decaying after recombination: lensing constraints with planck data |
mono-x searches are standard dark matter search strategies at the lhc. first, we show how in the case of initial state radiation they essentially collapse to mono-jet searches. second, we systematically study mono-x signatures from decays of heavier dark matter states. direct detection constraints strongly limit our ms... | actual physics behind mono-x |
we analyzed a 6.7-yr span of data from a rotating torsion-pendulum containing ≈1023 polarized electrons to search for the "wind" arising from ultralight, axionlike dark matter with masses between 10-23 and 10-18 ev /c2 . over much of this range we set a 95% confidence limit fa/ce>2 ×1015 ev on the axionlike decay co... | constraints on axionlike dark matter with masses down to 10-23 ev /c2 |
in this essay, we discuss the possibilities and associated challenges concerning beyond the standard model searches at fcc-ee, such as rare decays of heavy-flavoured particles and long-lived particles. the standard model contains several suppression mechanisms, which cause a given group of processes to happen rarely, r... | hunt for rare processes and long-lived particles at fcc-ee |
an unidentified line at energy around 3.5 kev was detected in the spectra of dark matter-dominated objects. recent work [1] used 30~msec of xmm-newton blank-sky observations to constrain the admissible line flux, challenging its dark matter decay origin. we demonstrate that these bounds are overestimated by more than a... | technical comment on the paper of dessert et al. "the dark matter interpretation of the 3.5 kev line is inconsistent with blank-sky observations" |
to address the link between the composition and decomposition of freshwater dissolved organic matter (dom), we manipulated the dom from three boreal lakes using preincubations with uv light to cleave large aromatic molecules and polyvinylpyrrolidone (pvp) to remove colored phenolic compounds. subsequently, we monitored... | effects of compositional changes on reactivity continuum and decomposition kinetics of lake dissolved organic matter |
we generalize dark matter production to a two-metric framework whereby the physical metric, which couples to the standard model (sm), is conformally and/or disformally related to the metric governing the gravitational dynamics. we show that this setup is naturally present in many ultra violet (uv) constructions, from k... | disformal dark matter |
recent investigations have emphasized the importance of uncertainty quantification (uq) in nuclear theory. we carry out uq for configuration-interaction shell-model calculations in the 1 s -0 d valence space, investigating the sensitivity of observables to perturbations in the 66 parameters (matrix elements) of a high-... | uncertainty quantification of an empirical shell-model interaction using principal component analysis |
strong coupling between quantum emitters and photonic modes, at which the level splitting (ls) of the mixed quantum states occurs, has aroused great interest due to diverse important quantum applications. the spectral rabi-splitting (srs) in photon emission or absorption has been extensively used to characterize strong... | relativity and diversity of strong coupling in coupled plasmon-exciton systems |
the residual radioactive contaminations of zinc tungstate crystal scintillators, produced by low-thermal-gradient czochralski technique in various conditions, have been measured in the dama/r&d low background setup at the gran sasso national laboratory (infn, italy). the total alpha activity has been measured in th... | new development of radiopure znwo4 crystal scintillators |
we have developed and tested a new way of coupling bolometric light detectors to scintillating crystal bolometers based upon simply resting the light detector on the crystal surface, held in position only by gravity. this straightforward mounting results in three important improvements: (1) it decreases the amount of n... | cryogenic light detectors with enhanced performance for rare event physics |
we investigate the possibility that the peccei-quinn phase transition occurs at a temperature far below the symmetry breaking scale. low phase transition temperatures are typical in supersymmetric theories, where symmetry breaking fields have small masses. we find that qcd axions are abundantly produced just after the ... | qcd axion dark matter from a late time phase transition |
discrepancies from in-beam- and in-bottle-type experiments measuring the neutron lifetime are on the 4 σ standard deviation level. in a recent publication fornal and grinstein proposed that the puzzle could be solved if the neutron would decay on the one percent level via a dark decay mode, one possible branch being n ... | constraints on the dark matter interpretation n →χ +e+e- of the neutron decay anomaly with the perkeo ii experiment |
we present the results of the search for decaying dark matter with particle mass in the 6-40 kev range with nustar deep observations of cosmos and ecdfs empty sky fields. we show that the main contribution to the decaying dark matter signal from the milky way galaxy comes through the aperture of the nustar detector, ra... | decaying dark matter search with nustar deep sky observations |
cosmological relaxation of the electroweak scale via higgs-axion interplay, named as relaxion mechanism, provides a dynamical solution to the higgs mass hierarchy. in the original proposal by graham, kaplan and rajendran, the relaxion abundance today is too small to explain the dark matter of the universe because of th... | relaxion dark matter from stochastic misalignment |
oscillons are localized states of scalar fields sustained by self interactions. they decay by emitting classical radiation, but their lifetimes are surprisingly large. we revisit the reasons behind their longevity, aiming at how the shape of the scalar potential v(ϕ) determines the lifetime. the corpuscular picture, wh... | recipes for oscillon longevity |
a new mechanism has been proposed to simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the universe. this scenario predicts exotic b -meson decays into a baryon and a dark-sector antibaryon (ψd) with branching fractions accessible at b factories. we present a search for b →λ ψd d... | search for b mesogenesis at babar |
we review the current status of the long-term programme of numerical investigation of sp(2n) gauge theories with and without fermionic matter content. we start by introducing the phenomenological as well as theoretical motivations for this research programme, which are related to composite higgs models, models of parti... | sp(2n) lattice gauge theories and extensions of the standard model of particle physics |
a search for dark matter produced in association with a higgs boson in final states with two hadronically decaying $\tau$-leptons and missing transverse momentum is presented. the analysis uses $139$ fb$^{-1}$ of proton-proton collision data at $\sqrt{s}=13$ tev collected by the atlas experiment at the large hadron col... | search for dark matter produced in association with a higgs boson decaying to tau leptons at $\\sqrt{s}=13$ tev with the atlas detector |
in the context of twin higgs models, we study a simple mechanism that simultaneously generates asymmetries in the dark and visible sector through the out-of-equilibrium decay of a tev-scale particle charged under a combination of baryon and twin baryon number. we predict the dark matter to be a 5 gev twin baryon, which... | twin mechanism for baryon and dark matter asymmetries |
the discovery by the icecube experiment of a high-energy astrophysical neutrino flux with energies of the order of pev, has opened new scenarios in astroparticles physics. a possibility to explain this phenomenon is to consider the minimal models of dark matter (dm) decay, the 4-dimensional operator ∼ y_{α χ }\overline... | pev icecube signals and dark matter relic abundance in modified cosmologies |
the axion mass receives a large correction from small instantons if the qcd gets strongly coupled at high energies. we discuss the size of the new cp violating phases caused by the fact that the small instantons are sensitive to the uv physics. we also discuss the effects of the mass correction on the axion abundance o... | strong cp problem and axion dark matter with small instantons |
the domain wall problem of the peccei-quinn mechanism can be solved if the peccei-quinn symmetry is explicitly broken by a small amount. domain walls decay into axions, which may account for dark matter of the universe. this scheme is however strongly constrained by overproduction of axions unless the phase of the expl... | qcd axion dark matter from long-lived domain walls during matter domination |
we propose probing sub-gev dark photon decays into lighter dark matter using monophoton events at the besiii detector and future super tau charm factory (stcf). we compute the cross section due to the dark photon associated a standard model photon production, and study the corresponding standard model irreducible/reduc... | probing invisible decay of a dark photon at besiii and a future super tau charm factory via monophoton searches |
it has been proposed that two resonances could coincide in the early universe at temperatures t ~ 0.2 ... 0.5 gev: one between two nearly degenerate gev-scale sterile neutrinos, producing a large lepton asymmetry through freeze-out and decays; another between medium-modified active neutrinos and kev-scale sterile neutr... | sterile neutrino dark matter via coinciding resonances |
it has long been known that the sharpened tension between the observed and inferred values of the hubble constant h0 can be alleviated if a fraction of dark-matter particles of type χ were produced nonthermally in association with photons γ through the decays of a heavy and relatively long-lived state, viz., x →χ γ . i... | decaying dark matter, the h0 tension, and the lithium problem |
we revisit a mechanism to enhance the decay width of (pseudo-)scalar resonances to photon pairs when the process is mediated by loops of charged fermions produced near threshold. motivated by the recent lhc data, indicating the presence of an excess in the diphoton spectrum at approximately 750 gev, we illustrate this ... | threshold enhancement of diphoton resonances |
in this rapid communication, we address the chiral properties of valley exciton-polaritons in a monolayer of w s2 in the regime of strong light-matter coupling with a tamm-plasmon resonance. we observe that the effect of valley polarization, which manifests in the circular polarization of the emitted photoluminescence ... | observation of macroscopic valley-polarized monolayer exciton-polaritons at room temperature |
we study the early kinetic decoupling effect in a pseudo-nambu-goldstone (png) dark matter (dm) model. the png dm scattering processes with particles in the thermal bath in the early universe are suppressed by the small momentum transfer. as a result, kinetic equilibrium is not maintained, and the temperature of dm is ... | early kinetic decoupling and a pseudo-nambu-goldstone dark matter model |
if a fraction fdcdm of the dark matter decays into invisible and massless particles (so-called "dark radiation") with the decay rate (or inverse lifetime) γdcdm, such decay will leave distinctive imprints on cosmological observables. with a full consideration of the boltzmann hierarchy, we calculate the decay-induced i... | fractional dark matter decay: cosmological imprints and observational constraints |
pandax-4t is a ton-scale dark matter direct detection experiment using a dual-phase tpc technique at the china jinping underground laboratory. various ultra-low background technologies have been developed and applied to material screening for pandax-4t, including hpge gamma spectroscopy, icp-ms, naa, radon emanation me... | low radioactive material screening and background control for the pandax-4t experiment |
the origin of neutrino flux observed in icecube is still mainly unknown. typically two flux components are assumed, namely: atmospheric neutrinos and an unknown astrophysical term. in principle the latter could also contain a top-down contribution coming for example from decaying dark matter. in this case one should al... | decaying dark matter at icecube and its signature on high energy gamma experiments |
it has been found that a pseudo-nambu-goldstone boson dark matter suppresses the amplitude for elastic scattering with nuclei in non-relativistic limit, and thus can naturally evade the strong constraint of dark matter direct detection experiments. in this paper, we show that non-zero elastic scattering cross section c... | direct detection of pseudo-nambu-goldstone dark matter with light mediator |
we introduce and study the first class of signals that can probe the dark matter in mesogenesis which will be observable at current and upcoming large volume neutrino experiments. the well-motivated mesogenesis scenario for generating the observed matter-anti-matter asymmetry necessarily has dark matter charged under b... | dark matter induced nucleon decay signals in mesogenesis |
a search for a narrow resonance with a mass between 350 and 700 gev, and decaying into a pair of jets, is performed using proton-proton collision events containing at least three jets. the data sample corresponds to an integrated luminosity of 18.3 fb$^{-1}$ recorded at $\sqrt{s} =$ 13 tev with the cms detector. data a... | search for dijet resonances using events with three jets in proton-proton collisions at $\\sqrt{s} =$ 13 tev |
we explore the prospects for observing cp violation in the minimal supersymmetric extension of the standard model (mssm) with six cp-violating parameters, three gaugino mass phases and three phases in trilinear soft supersymmetry-breaking parameters, using the cpsuperh code combined with a geometric approach to maximis... | exploring cp violation in the mssm |
anomaly-mediated supersymmetry breaking (amsb) models seem to have become increasingly implausible due to 1) difficulty in generating a higgs mass mh∼125 gev , 2) typically unnatural superparticle spectra characterized by a large superpotential mu term, and 3) the possibility of a winolike lightest supersymmetry partic... | anomaly-mediated susy breaking model retrofitted for naturalness |
we consider an anomaly-free u(1) extension of the standard model with three right-handed neutrinos (rhns) and two complex scalars, wherein the charge assignments preclude all tree-level mass terms for the neutrinos. considering this setup, in turn, to be only a low-energy effective theory, we introduce higher-dimension... | neutrino and z' phenomenology in an anomaly-free u(1) extension: role of higher-dimensional operators |
we investigate whether the recently observed 2.6 m ⊙ compact object in the gravitational wave event gw190814 can be a bosonic dark matter (dm) admixed compact star. by considering the three constraints of mass, radius, and the stability of such an object, we find that if the dm is made of qcd axions, their particle mas... | could the gw190814 secondary component be a bosonic dark matter admixed compact star? |
we present a model explaining both the 4.2 σ muon g -2 anomaly and the relic density of dark matter (dm) in which dm interacts with the standard model (sm) via a scalar portal boson φ carrying both dark and sm leptonic numbers, and mediating a nondiagonal interaction between the electron and muon that allows e ↔μ trans... | leptonic scalar portal: origin of muon g -2 anomaly and dark matter? |
in this paper, we discuss interesting scenarios resulting from the interplay between the gravitino and the lightest right-handed (s)neutrino. we consider two gravitino mass regimes vastly separated, that is, m3/2 = o (100) ev and m3/2 ≃ 100 gev. for the former case, a significant amount of the entropy production in the... | gravitino cosmology helped by a right handed (s)neutrino |
we present a thorough discussion of light dark matter produced via freeze-in in two-body decays a→ b dm . if a and b are quasi-degenerate, the dark matter particle has a cold spectrum even for kev masses. we show this explicitly by calculating the transfer function that encodes the impact on structure formation. as exa... | cold light dark matter in extended seesaw models |
the dama collaboration reported an annually modulated rate with a phase compatible with a dark matter induced signal. we point out that a slowly varying rate can bias or even simulate an annual modulation if data are analyzed in terms of residuals computed by subtracting approximately yearly averages starting from a fi... | annual modulations from secular variations: relaxing dama? |
we present a minimal uv complete framework to embed inflation and dark matter by extending the standard model with a singlet real scalar field (the inflaton) and a singlet fermionic field acting as dark matter. the inflaton features the most general renormalizable polynomial up to quartic order, which is flat due to th... | polynomial inflation and dark matter |
we study polariton superregular (sr) breathers triggered by the resonant interaction of an optical field with two-level doping ions in an erbium-doped fiber. we demonstrate explicitly that the optical wave component always features a bright structure that describes the modulation instability (mi) development from local... | polariton superregular breathers in a resonant erbium-doped fiber |
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