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we show that coupling of ultralight dark matter (udm) to quarks and gluons would lead to an oscillation of the nuclear charge radius for both the quantum chromodynamics (qcd) axion and scalar dark matter. consequently, the resulting oscillation of electronic energy levels could be resolved with optical atomic clocks, a... | oscillating nuclear charge radii as sensors for ultralight dark matter |
we consider the possibility of an enlarged qcd color group, su (3 +n') spontaneously broken to su (3 )c×su (n') with extra vectorlike quarks transforming in the fundamental representation. when the heavy quarks are integrated out below the pq-breaking scale, they generate an axion coupling which simultaneously solves t... | a visible qcd axion from an enlarged color group |
we point out that the physics at the extreme ir — cosmology — might provide tests of the physics of the extreme uv — the weak gravity conjecture. the current discrepancies in the determination of h0 may hint at a modification of λcdm. an extension which may fit better comprises an early contribution to dark energy whic... | dark energy, h0 and weak gravity conjecture |
understanding ultracold collisions involving molecules is of fundamental importance for current experiments, where inelastic collisions typically limit the lifetime of molecular ensembles in optical traps. here we present a broad study of optically trapped ultracold rbcs molecules in collisions with one another, in rea... | molecule-molecule and atom-molecule collisions with ultracold rbcs molecules |
the ultrafast nonradiative relaxation of a molecular ensemble coupled to a cavity mode is considered theoretically and by real-time quantum dynamics. for equal coupling strength of single molecules to the cavity mode, the nonradiative relaxation rate from the upper to the lower polariton states is found to strongly dep... | collective jahn-teller interactions through light-matter coupling in a cavity |
there exist non-trivial stationary points of the euclidean action for an axion particle minimally coupled to einstein gravity, dubbed wormholes. they explicitly break the continuos global shift symmetry of the axion in a non-perturbative way, and generate an effective potential that may compete with qcd depending on th... | wormholes and masses for goldstone bosons |
we report on a direct search for sub-gev dark photons (a') which might be produced in the reaction e^- z \to e^- z a' via kinetic mixing with photons by 100 gev electrons incident on an active target in the na64 experiment at the cern sps. the a's would decay invisibly into dark matter particles resulting in events wit... | search for invisible decays of sub-gev dark photons in missing-energy events at the cern sps |
the extension of standard model made by inclusion of additional u (1 ) gauge lμ-lτ symmetry can explain the difference between the measured and the predicted value of the muon magnetic moment and solve the tension in b meson decays. this model predicts the existence of a new, light z' vector boson, predominantly couple... | search for a light z' in the lμ-lτ scenario with the na64-e experiment at cern |
we consider the production of dark matter during the process of reheating after inflation. the relic density of dark matter from freeze-in depends on both the energy density and energy distribution of the inflaton scattering or decay products composing the radiation bath. we compare the perturbative and non-perturbativ... | freeze-in from preheating |
we present the gambit modules specbit, decaybit and precisionbit. together they provide a new framework for linking publicly available spectrum generators, decay codes and other precision observable calculations in a physically and statistically consistent manner. this allows users to automatically run various combinat... | specbit, decaybit and precisionbit: gambit modules for computing mass spectra, particle decay rates and precision observables |
even after decades of research, the problem of first passage time statistics for quantum dynamics remains a challenging topic of fundamental and practical importance. using a projective measurement approach, with a sampling time τ , we obtain the statistics of first detection events for quantum dynamics on a lattice, w... | quantum walks: the first detected passage time problem |
we discuss the 750 gev diphoton excess at the lhc@13tev in the framework of leptophobic u(1)' model inspired by e 6 grand unified theory (gut). in this model, the standard model (sm) chiral fermions carry charges under extra u(1)' gauge symmetry which is spontaneously broken by a u(1)'-charged singlet scalar (φ). in ad... | diphoton excess at 750 gev in leptophobic u(1)' model inspired by e 6 gut |
dark matter, x, may be generated by new physics at the tev scale during an early matter-dominated (md) era that ends at temperature tr ≪ tev. compared to the conventional radiation-dominated (rd) results, yields from both freeze-out and freeze-in processes are greatly suppressed by dilution from entropy production, mak... | freeze-in dark matter with displaced signatures at colliders |
we analyze in detail the lhc prospects at the center-of-mass enery of √{s} = 14 tev for charged electroweakino searches, decaying to leptons, in compressed supersymmetry scenarios, via exclusive photon-initiated pair production. this provides a potentially increased sensitivity in comparison to inclusive channels, wher... | lhc searches for dark matter in compressed mass scenarios: challenges in the forward proton mode |
we show that the excess events observed in a number of recent lhc resonance searches can be simultaneously explained within a nonsupersymmetric left-right inverse seesaw model for neutrino masses with wr mass around 1.9 tev. the minimal particle content that leads to gauge coupling unification in this model predicts gr... | unified explanation of the e e j j , diboson, and dijet resonances at the lhc |
in vibrational strong coupling (vsc), molecular vibrations strongly interact with the modes of an optical cavity to form hybrid light-matter states known as vibrational polaritons. experiments show that the kinetics of thermally activated chemical reactions can be modified by vsc. transition-state theory, which assumes... | nonequilibrium effects of cavity leakage and vibrational dissipation in thermally activated polariton chemistry |
we assess the impact of searches at flavor factories for new neutral resonances that couple to both photons and gluons. these are well motivated by "heavy axion" solutions of the strong cp problem and by frameworks addressing both dark matter and the higgs hierarchy problem. we use lhcb public diphoton data around the ... | new axion searches at flavor factories |
we investigate cosmological structure formation in fuzzy dark matter (fdm) with the attractive self-interaction (si) with numerical simulations. such a si would arise if the fdm boson were an ultra-light axion, which has a strong cp symmetry-breaking scale (decay constant). although weak, the attractive si may be stron... | cosmological structure formation and soliton phase transition in fuzzy dark matter with axion self-interactions |
we perform frequentist and bayesian statistical analyses of higgs- and z -portal models of dark matter particles with spin 0, 1 /2 , and 1. our analyses incorporate data from direct detection and indirect detection experiments, as well as lhc searches for monojet and monophoton events, and we also analyze the potential... | statistical analyses of higgs- and z -portal dark matter models |
we introduce the gambit universal model machine (gum), a tool for automatically generating code for the global fitting software framework gambit, based on lagrangian-level inputs. gum accepts models written symbolically in feynrules and sarah formats, and can use either tool along with madgraph and calchep to generate ... | the gambit universal model machine: from lagrangians to likelihoods |
an only early or only late time alteration to λ cdm has been inadequate at resolving both the h0 and s8 tensions simultaneously; however, a combination of early and late time alterations to λ cdm can provide a solution to both tensions. as an illustration, we examine a combined early dark energy, decaying dark matter m... | h0 and s8 tensions necessitate early and late time changes to λ cdm |
we have studied three realistic benchmark geometries for a new far detector gazelle to search for long-lived particles at the \superkekb accelerator in tsukuba, japan. the new detector would be housed in the same building as belle ii and observe the same $e^+e^-$ collisions. to assess the discovery reach of gazelle, we... | physics reach of a long-lived particle detector at belle ii |
we perform a theoretical study of radiative decay of dark intravalley excitons in transition metal dichalcogenide monolayers. this decay necessarily involves an electronic spin flip. the intrinsic decay mechanism due to interband spin-flip dipole moment perpendicular to the monolayer plane, gives a rate about 100-1000 ... | spin-flip processes and radiative decay of dark intravalley excitons in transition metal dichalcogenide monolayers |
a search is presented for an excess of events with large missing transverse momentum in association with at least one highly energetic jet, in a data sample of proton-proton collisions at a centre-of-mass energy of 8 tev. the data correspond to an integrated luminosity of 19.7 fb-1 collected by the cms experiment at th... | search for dark matter in proton-proton collisions at 8 tev with missing transverse momentum and vector boson tagged jets |
axion cold dark matter from standard misalignment typically requires a decay constant fa gtrsim 1011 gev . kinetic misalignment and parametric resonance easily allow lower values of fa when the radial peccei-quinn (pq) symmetry breaking field takes large initial values. here, we consider the effects of inflation on kin... | axion kinetic misalignment and parametric resonance from inflation |
a search for new physics is presented in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from b quarks, and missing transverse momentum ($p_\mathrm{t}^\text{miss}$). the search uses proton-proton collision data at $\sqrt{s}=$ 13 tev amounting to 35.9 fb$^{-1}$ of in... | search for top squarks and dark matter particles in opposite-charge dilepton final states at $\\sqrt{s}=$ 13 tev |
in monolayers of semiconducting transition metal dichalcogenides, the light helicity (σ+ or σ-) is locked to the valley degree of freedom, leading to the possibility of optical initialization of distinct valley populations. however, an extremely rapid valley pseudospin relaxation (at the time scale of picoseconds) occu... | tuning valley polarization in a wse2 monolayer with a tiny magnetic field |
the formation and decay of metastable bound states can significantly decrease the thermal-relic dark matter density, particularly for dark matter masses around and above the tev scale. incorporating bound-state effects in the dark matter thermal decoupling requires in principle a set of coupled boltzmann equations for ... | saha equilibrium for metastable bound states and dark matter freeze-out |
excitation of ionic solids with extreme ultraviolet pulses creates localized core-level excitons, which in some cases couple strongly to the lattice. here, core-level-exciton states of magnesium oxide are studied in the time domain at the mg l2 ,3 edge with attosecond transient reflectivity spectroscopy. attosecond pul... | attosecond time-domain measurement of core-level-exciton decay in magnesium oxide |
we investigate the quenching of the photoluminescence (pl) from the divacancy defect in 4 h -sic consisting of a nearest-neighbor silicon and carbon vacancies. the quenching occurs only when the pl is excited below certain photon energies (thresholds), which differ for the four different inequivalent divacancy configur... | excitation properties of the divacancy in 4 h -sic |
we explore the possibility that the recently reported diphoton excess at atlas and cms can be accommodated within a minimal extension of a left-right symmetric model. our setup is able to simultaneously explain the run 2 diphoton and run 1 diboson excesses, while providing a standard thermal freeze-out of weak-scale da... | diphoton and diboson excesses in a left-right symmetric theory of dark matter |
we compare dark matter production from the thermal bath in the early universe with its direct production through the decay of the inflaton. we show that even if dark matter does not possess a direct coupling with the inflaton, standard model loop processes may be sufficient to generate the correct relic abundance. | radiative production of nonthermal dark matter |
defect induced trap states are essential in determining the performance of semiconductor photodetectors. the de-trap time of carriers from a deep trap could be prolonged by several orders of magnitude as compared to shallow trap, resulting in additional decay/response time of the device. here, we demonstrate that the t... | defect engineering for modulating the trap states in 2d photoconductors |
this paper presents a search for dark matter in the context of a two-higgs-doublet model together with an additional pseudoscalar mediator, a, which decays into the dark-matter particles. processes where the pseudoscalar mediator is produced in association with a single top quark in the 2hdm+a model are explored for th... | search for dark matter produced in association with a single top quark in √{s }=13 tev pp collisions with the atlas detector |
rades (relic axion detector exploratory setup) is a project with the goal of directly searching for axion dark matter above the 30μev scale employing custom-made microwave filters in magnetic dipole fields. currently rades is taking data at the lhc dipole of the cast experiment. in the long term, the rades cavities are... | scalable haloscopes for axion dark matter detection in the 30 μev range with rades |
hadronic showers transfer a relevant amount of their energy to electromagnetic subshowers. we show that the generation of "secondary" dark photons in these subshowers is significant and typically dominates the production at low dark photon masses. the resulting dark photons are however substantially less energetic than... | new production channels for light dark matter in hadronic showers |
we assess the impact of searches at flavor factories for new neutral resonances that couple to both photons and gluons. these are well motivated by "heavy axion" solutions of the strong cp problem and by frameworks addressing both dark matter and the higgs hierarchy problem. we use lhcb public diphoton data around the ... | new axion searches at flavor factories |
low-scale baryogenesis could be discovered at b factories and the lhc. in the b -mesogenesis paradigm [g. elor, m. escudero, and a. e. nelson, phys. rev. d 99, 035031 (2019), 10.1103/physrevd.99.035031], the c p -violating oscillations and subsequent decays of b mesons in the early universe simultaneously explain the o... | collider signals of baryogenesis and dark matter from b mesons: a roadmap to discovery |
it has been proposed recently that a previously unobserved neutron decay branch to a dark matter particle (χ ) could account for the discrepancy in the neutron lifetime observed in experiments that use two different measurement techniques. one of the possible final states discussed includes a single χ along with an e+e... | search for dark matter decay of the free neutron from the ucna experiment: n →χ +e+e- |
a search for a higgs boson produced via vector-boson fusion and decaying into invisible particles is presented, using 20.3 fb$^{-1}$ of proton--proton collision data at a centre-of-mass energy of 8 tev recorded by the atlas detector at the lhc. for a higgs boson with a mass of 125 gev, assuming the standard model produ... | search for invisible decays of a higgs boson using vector-boson fusion in $pp$ collisions at $\\sqrt{s}=8$ tev with the atlas detector |
we report on the response of liquid xenon to low energy electronic recoils below 15 kev from beta decays of tritium at drift fields of 92 v /cm , 154 v /cm and 366 v /cm using the xenon100 detector. a data-to-simulation fitting method based on markov chain monte carlo is used to extract the photon yields and recombinat... | signal yields of kev electronic recoils and their discrimination from nuclear recoils in liquid xenon |
we compute the non-perturbative contribution of semileptonic tensor operators (\overline{q}{σ}^{μ ν }q)(\overline{ℓ}{σ}_{μ ν}ℓ ) to the purely leptonic process μ → eγ and to the electric and magnetic dipole moments of charged leptons by matching onto chiral perturbation theory at low energies. this matching procedure h... | non-perturbative effects in μ → eγ |
several extensions of the standard model predict the production of dark matter particles at the lhc. a search for dark matter particles produced in association with a dark higgs boson decaying into w+w− in the ℓ±νq q¯', final states with ℓ = e, μ is presented. this analysis uses 139 fb−1 of pp collisions recorded by th... | search for dark matter produced in association with a dark higgs boson decaying into w+w− in the one-lepton final state at √{s } = 13 tev using 139 fb−1 of pp collisions recorded with the atlas detector |
the standard model of quarks and leptons is extended to include the gauge symmetry u(1)χ which comes from so (10) → su (5) × u(1)χ. the radiative generation of dirac neutrino masses through dark matter is discussed in two examples. one allows for light dirac fermion dark matter. the other allows for self-interacting sc... | scotogenic u(1)χ dirac neutrinos |
we consider the scattering of dark matter particles from superfluid liquid he 4 , which has been proposed as a target for their direct detection. focusing on dark matter masses below ∼1 mev , we demonstrate from sum-rule arguments the importance of the production of single phonons with energies ω ≲1 mev . we show furth... | searching for low mass dark matter via phonon creation in superfluid he 4 |
the strong light-matter optomechanical coupling offered by coherent scattering set-ups have allowed the experimental realization of quantum ground-state cavity cooling of the axial motion of a levitated nanoparticle [u. delić et al., science 367, 892 (2020), 10.1126/science.aba3993]. an appealing milestone is now quant... | coherent-scattering two-dimensional cooling in levitated cavity optomechanics |
a search for dark matter and unparticle production at the lhc has been performed using events containing two charged leptons (electrons or muons), consistent with the decay of a z boson, and large missing transverse momentum. this study is based on data collected with the cms detector in 2015, corresponding to an integ... | search for dark matter and unparticles in events with a z boson and missing transverse momentum in proton-proton collisions at √{s}=13 tev |
a search for new physics is presented in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from b quarks, and missing transverse momentum (ptmiss). the search uses proton-proton collision data at √{s }=13 tev amounting to 35.9 fb-1 of integrated luminosity collected u... | search for top squarks and dark matter particles in opposite-charge dilepton final states at √{s }=13 tev |
we show how 21 cm cosmology can test relic neutrino radiative decays into sterile neutrinos. using recent edges results, we derive constraints on the lifetime of the decaying neutrinos. if the edges anomaly will be confirmed, then there are two solutions, one for much longer and one for much shorter lifetimes than the ... | probing relic neutrino radiative decays with 21 cm cosmology |
we investigate the critical dynamics of spin superflow in an easy-plane antiferromagnetic spinor bose-einstein condensate. spin-dipole oscillations are induced in a trapped condensate by applying a linear magnetic field gradient and we observe that the damping rate increases rapidly as the field gradient increases abov... | critical spin superflow in a spinor bose-einstein condensate |
the qcd axion cosmology depends crucially on whether the qcd axion is present during inflation or not. we point out that contrary to the standard criterion, the peccei-quinn (pq) symmetry could remain unbroken during inflation, even when the axion decay constant, fa, is (much) above the inflationary hubble scale, hi. t... | opening up a window on the postinflationary qcd axion |
in this paper we study a leptophilic dark matter scenario involving feeble dark matter coupling to the standard model (sm) and compressed dark matter-mediator mass spectrum. we consider a simplified model where the sm is extended with one majorana fermion, the dark matter, and one charged scalar, the mediator, coupling... | a feeble window on leptophilic dark matter |
we investigate the capability of the future electron collider cepc in probing the parameter space of several dark matter models, including millicharged dark matter models, z ' portal dark matter models, and effective dark matter operators. in our analysis, the monophoton final state is used as the primary channel to de... | probing dark matter particles at cepc |
the deap-3600 experiment is searching for weakly interacting massive particles dark matter with a 3.3 ×1 03 kg single phase liquid argon (lar) target, located 2.1 km underground at snolab. the experimental signature of dark matter interactions is kilo electron volt-scale 40ar nuclear recoils producing 128 nm lar scinti... | electromagnetic backgrounds and potassium-42 activity in the deap-3600 dark matter detector |
we investigate the prospects for producing new, light, hidden states at a future e + e - collider in a higgsed dark u(1) dmodel, which we call the double dark portal model. the simultaneous presence of both vector and scalar portal couplings immediately modifies the standard model higgsstrahlung channel, e + e - → zh, ... | a tale of two portals: testing light, hidden new physics at future e + e - colliders |
a search for supersymmetry (susy) is performed in final states comprising one or more jets and missing transverse momentum using data from proton-proton collisions at a centre-of-mass energy of 13 tev. the data were recorded with the cms detector at the cern lhc in 2016 and correspond to an integrated luminosity of 35.... | search for natural and split supersymmetry in proton-proton collisions at √{s}=13 tev in final states with jets and missing transverse momentum |
we report results of a search for dark-matter-nucleon interactions via a dark mediator using optimized low-energy data from the pandax-4t liquid xenon experiment. with the ionization-signal-only data and utilizing the migdal effect, we set the most stringent limits on the cross section for dark matter masses ranging fr... | search for dark-matter-nucleon interactions with a dark mediator in pandax-4t |
the measurement of the triple gauge couplings (tgcs) is a central part of diboson studies at the lhc. in this letter we consider the zγ process and include anomalous tgcs (atgcs) in the event generation at next-to-next-to-leading order qcd accuracy (nnlo+ps) within the minnlops framework. while our implementation is fu... | anomalous couplings in zγ events at nnlo+ps and improving ν ν bar γ backgrounds in dark-matter searches |
the clockwork axion refers to a family of aligned multi-axion models that lead to an exponential hierarchy between the scale of peccei-quinn symmetry breaking and the scale of the axion decay constant. the clockworking can bring the peccei-quinn-scale particles to within reach of collider experiments. in this work we a... | cosmological aspects of the clockwork axion |
we propose to use fermionic atoms with degenerate ground and excited internal levels (fg→fe), loaded into the motional ground state of an optical lattice with two atoms per lattice site, to realize dark states with no radiative decay. the physical mechanism behind the dark states is an interplay of pauli blocking and m... | dark states of multilevel fermionic atoms in doubly filled optical lattices |
there exist non-trivial stationary points of the euclidean action for an axion particle minimally coupled to einstein gravity, dubbed wormholes. they explicitly break the continuos global shift symmetry of the axion in a non-perturbative way, and generate an effective potential that may compete with qcd depending on th... | wormholes and masses for goldstone bosons |
we examine the sensitivity of the large hadron collider (lhc) to light lepton portal dark matter with its mass below 10 gev. the model features an extra doublet scalar field and singlet dirac dark matter, which have yukawa interactions with left-handed leptons. to correctly produce the dark matter abundance via the the... | light lepton portal dark matter meets the lhc |
we unveil the dynamical formation of multiple localized structures in the form of dark-bright and dark-antidark solitary waves that emerge upon quenching a one-dimensional particle-imbalanced bose-bose mixture. interspecies interaction quenches drive the system out of equilibrium while the so-called miscible-immiscible... | spontaneous generation of dark-bright and dark-antidark solitons upon quenching a particle-imbalanced bosonic mixture |
we consider the gauged u (1) clockwork theory with a product of multiple gauge groups and discuss the continuum limit of the theory to a massless gauged u (1) with linear dilaton background in five dimensions. the localization of the lightest state of gauge fields on a site in the theory space naturally leads to expone... | gauged u(1) clockwork theory |
we present a search for the decays of $b^0$ mesons into a final state containing a $\lambda$ baryon and missing energy. these results are obtained from a $711\text{fb}^{-1}$ data sample that contains $772 \times 10^6$ $b{\kern 0.18em}\overline{\kern -0.18em b}$ pairs and was collected near the $\upsilon(4s)$ resonance ... | search for $b^0$ meson decays into $\\lambda$ and missing energy with a hadronic tagging method at belle |
it has been proposed that in a part of the parameter space of the standard model completed by three generations of kev…gev right-handed neutrinos, neutrino masses, dark matter, and baryon asymmetry can be accounted for simultaneously. here we numerically solve the evolution equations describing the cosmology of this sc... | sterile neutrino dark matter via gev-scale leptogenesis? |
the recent observation of an excess in the electronic recoil data by the xenon1t detector has drawn many attentions as a potential hint for an extension of the standard model (sm). absorption of a vector boson with the mass of ma‧ ∈ (2kev , 3kev) is one of the feasible explanations to the excess. in the case where the ... | feebly interacting u(1)b-l gauge boson warm dark matter and xenon1t anomaly |
a search for dark matter (dm) particles produced in association with a hadronically decaying vector boson is performed using $pp$ collision data at a centre-of-mass energy of $\sqrt{s}=13$ tev corresponding to an integrated luminosity of 36.1 fb$^{-1}$, recorded by the atlas detector at the large hadron collider. this ... | search for dark matter in events with a hadronically decaying vector boson and missing transverse momentum in $pp$ collisions at $\\sqrt{s} = 13$ tev with the atlas detector |
in higgs portal models of fermion dark matter, scalar couplings are unavoidably suppressed by strong bounds from direct detection experiments. as a consequence, thermal dark matter relics must coexist with mediators in a compressed spectrum of dark particles. small couplings and small mass splittings lead to slow media... | long live the higgs portal! |
cold atoms experiments offer invaluable information on superfluid dynamics, including decay cascades of topological defects. while the cascade properties are well established for bose systems, our understanding of their behavior in fermi counterparts is very limited, in particular in spin-imbalanced systems, where supe... | suppressed solitonic cascade in spin-imbalanced superfluid fermi gas |
we calculate the accurate spectrum of the stochastic gravitational-wave background from u(1) gauge fields produced by axion dark matter. the explosive production of gauge fields soon invalidates the applicability of the linear analysis and one needs nonlinear schemes. we make use of numerical lattice simulations to pro... | nano-hz gravitational-wave signature from axion dark matter |
the discovery of diffuse sub-pev gamma-rays by the tibet asγ 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 physics sce... | search for dark matter using sub-pev γ -rays observed by tibet asγ |
we perform a systematic study of the fermionic dm absorption interactions on electron target in the context of effective field theory. the fermionic dm absorption is not just sensitive to sub-mev dm with efficient energy release, but also gives a unique signature with clear peak in the electron recoil spectrum whose sh... | revisiting the fermionic dark matter absorption on electron target |
an axion-like-particle (alp) in the post-inflationary scenario with domain wall number n > 1 can be dark matter if the residual &z;n symmetry has a small explicit breaking. although we cannot determine the full dynamics of the system reliably, we provide evidence that such an alp can account for the observed dark ma... | post-inflationary axions: a minimal target for axion haloscopes |
we argue that demanding a consistent cosmological history, including the absence of domain walls and strongly interacting relics at the peccei-quinn scale, singles out two concrete realizations of hadronic qcd axions as viable dark matter models. these realizations generally feature flavor-violating axion couplings to ... | the flavor of qcd axion dark matter |
cosmic birefringence is predicted if an axionlike particle (alp) moves after the recombination. we show that this naturally happens if the alp is coupled to the dark matter density because it then acquires a large effective mass after the matter-radiation equality. our scenario applies to a broad range of the alp mass ... | cosmic birefringence triggered by dark matter domination |
a new scheme for lightest supersymmetric particle (lsp) dark matter is introduced and studied in theories of tev supersymmetry with a qcd axion, a, and a high reheat temperature after inflation, tr . a large overproduction of axinos ( ã) and gravitinos (\tilde{g}) from scattering at tr , and from freeze-in at the tev s... | gravitino or axino dark matter with reheat temperature as high as 1016 gev |
recently, we have witnessed two hints of physics beyond the standard model: a 3.3σ local excess (ma 0 = 52 gev) in the search for h0 → a0a0 → bb ¯μ+μ− and a 4.2σ deviation from the sm prediction in the (g − 2)μ measurement. the first excess was found by the atlas collaboration using 139 fb−1 data at √{s } = 13 tev. the... | shedding light on dark matter with recent muon (g − 2) and higgs exotic decay measurements |
in natural supersymmetry models, higgsinos are always light because μ2 cannot be much larger than mz2, while squarks and gluinos may be very heavy. unless gluinos are discovered at lhc13, the commonly assumed unification of gaugino mass parameters will imply correspondingly heavy winos and binos, resulting in a higgsin... | natural susy with a bino- or wino-like lsp |
production of the matter-antimatter asymmetry in the b-mesogenesis mechanism is directly related to the branching fraction of seemingly baryon number violating decays of b mesons into a light standard model baryon and missing energy. achieving the observed baryon asymmetry requires that the branching fraction for such ... | branching fractions of b meson decays in mesogenesis |
we revisit the multilepton (m l )+ et+x signatures of the inert doublet model (idm) of dark matter in future lhc experiments for m =3 , 4 and simulate, for the first time, the m =5 case. here x stands for any number of jets. we illustrate these signals with benchmark points consistent with the usual constraints like un... | exploring collider signatures of the inert higgs doublet model |
dark matter axion condensates may experience stimulated decays into photon pairs. this effect has been often interpreted as a parametric resonance of photons from the axion-photon coupling, leading to an exponential growth of the photon occupation number in a narrow instability band. most of the previous literature doe... | dynamical evolution of axion condensates under stimulated decays into photons |
as any e+e- scattering process can be accompanied by a hard photon emission from the initial state radiation, the analysis of the energy spectrum and angular distributions of those photons can be used to search for hard processes with an invisible final state. thus high energy e+e- colliders offer a unique possibility ... | sensitivity of future linear e+e- colliders to processes of dark matter production with light mediator exchange |
a <mml:mmultiscripts>rn 220 </mml:mmultiscripts> source is deployed on the xenon100 dark matter detector in order to address the challenges in calibration of tonne-scale liquid noble element detectors. we show that the <mml:mmultiscripts>pb 212 </mml:mmultiscripts> beta emission can be used for ... | results from a calibration of xenon100 using a source of dissolved radon-220 |
we demonstrate optically induced switching between bright and dark charged divacancy defects in 4h-sic. photoluminescence excitation and time-resolved photoluminescence measurements reveal the excitation conditions for such charge conversion. for an energy below 1.3 ev (above 950 nm), the pl is suppressed by more than ... | optical switching of defect charge states in 4h-sic |
180mta is the longest-lived metastable state presently known. its decay has not been observed yet. in this work, we report a new result on the decay of 180mta obtained with a 2015.12-g tantalum sample measured for 527.7 d with an ultra-low background hpge detector in the stella laboratory of the laboratori nazionali de... | deep-underground search for the decay of 180mta with an ultra-low-background hpge detector |
quantum emitters in confined arrays exhibit geometry dependent collective dynamics. in particular, nanoscopic regular polygon-shaped arrays can possess sub-radiant states with an exciton lifetime growing exponentially with emitter number. we show that by placing an extra resonant absorptive dipole at the ring center, s... | efficient nano-photonic antennas based on dark states in quantum emitter rings |
we consider the production of dark matter in association with a pair of top quarks, mediated by a scalar or pseudoscalar particle in a generic simplified model. we demonstrate that the difference of azimuthal angle between the two leptons δ ϕℓℓ, in the dileptonic top decay mode, can directly probe the c p -properties o... | constraining the strength and c p structure of dark production at the lhc: the associated top-pair channel |
a weighted average weak mixing angle θw derived from relatively low q2 experiments is compared with the standard model prediction obtained from precision measurements. the approximate 1.8 sigma discrepancy is fit with an intermediate mass (∼10 - 35 gev ) "dark" z boson zd, corresponding to a u (1 )d gauge symmetry of h... | low q2 weak mixing angle measurements and rare higgs decays |
the deap-3600 detector searches for the scintillation signal from dark matter particles scattering on a 3.3 tonne liquid argon target. the largest background comes from 39ar beta decays and is suppressed using pulse-shape discrimination (psd). we use two types of psd estimator: the prompt-fraction, which considers the ... | pulse-shape discrimination against low-energy ar-39 beta decays in liquid argon with 4.5 tonne-years of deap-3600 data |
in the framework of seesaw neutrino masses from heavy fermion triplets (σ+ ,σ0 ,σ-), the addition of a light fermion singlet n and a heavy scalar triplet (ρ+ ,ρ0 ,ρ-) has some important consequences. the new particles are assumed to be odd under a new z2 symmetry which is only broken softly, both explicitly and spontan... | type iii neutrino seesaw, freeze-in long-lived dark matter, and the w mass shift |
we implement inflation in a nonsupersymmetric s u (5 ) model based on a nonminimal coupling of the axion field to gravity. the isocurvature fluctuations are adequately suppressed, axions comprise the dark matter, proton lifetime estimates are of order 8 ×1034- 3 ×1035 yr , and the observed baryon asymmetry arises via n... | axion inflation, proton decay, and leptogenesis in s u (5 )×u (1 )p q |
we study bino-wino coannihilation scenario in the so-called spread or mini-split supersymmetry. we show that, in this model, a neutral wino has a macroscopic decay length in a wide range of parameter space. this characteristic feature could be observed as a displaced vertex plus missing transverse energy event at the l... | probing bino-wino coannihilation at the lhc |
we propose using quantum dots as novel targets to probe sub-gev dark matter-electron interactions. quantum dots are nanocrystals of semiconducting material, which are commercially available, with gram-scale quantities suspended in liter-scale volumes of solvent. quantum dots can be efficient scintillators, with near un... | dark matter direct detection with quantum dots |
in this work we consider a simple model for dark matter and identify regions of parameter space where the relic abundance is set via kinematic thresholds, which open and close due to thermal effects. we discuss instantaneous freeze-out, where dark matter suddenly freezes-out when the channel connecting dark matter to t... | variations on the vev flip-flop: instantaneous freeze-out and decaying dark matter |
oscura is a planned light-dark matter search experiment using skipper-ccds with a total active mass of 10 kg. as part of the detector development, the collaboration plans to build the oscura integration test (oit), an engineering test with 10% of the total mass. here we discuss the early science opportunities with the ... | searching for millicharged particles with 1 kg of skipper-ccds using the numi beam at fermilab |
we study the dark matter (dm) discovery prospect and its spin discrimination in the theoretical framework of gauge invariant and renormalizable higgs portal dm models at the ilc with √{s} = 500 gev. in such models, the dm pair is produced in association with a z boson. in the case of the singlet scalar dm, the mediator... | characterizing higgs portal dark matter models at the ilc |
we experimentally characterize the optical nonlinear response of a cold atomic medium placed inside an optical cavity, and excited to rydberg states. the excitation to s and d rydberg levels is carried out via a two-photon transition in an electromagnetically induced transparency configuration, with a weak (red) probe ... | rydberg-induced optical nonlinearities from a cold atomic ensemble trapped inside a cavity |
we present the results of a direct detection search for mirror dark matter interactions, using data collected from the large underground xenon experiment during 2013, with an exposure of 95 live -days ×118 kg . here, the calculations of the mirror electron scattering rate in liquid xenon take into account the shielding... | first direct detection constraint on mirror dark matter kinetic mixing using lux 2013 data |
using a fundamental discrete symmetry, zn, we construct a two-axion model with the qcd axion solving the strong-c p problem, and an ultralight axion (ula) with mula≈1 0-22 ev providing the dominant form of dark matter (dm). the ula is light enough to be detectable in cosmology from its imprints on structure formation, ... | an ultralight pseudoscalar boson |
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