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we provide updates to the limits on solar emission of dark photons or more generally, any light vector particle coupled to the electron vector current. the recent 2019 and 2020 electronic recoil data from xenon1t now provide more stringent constraints on these models than the stellar energy loss in the sub-kev mass reg... | new limits on dark photons from solar emission and kev scale dark matter |
indications of disequilibrium throughout the milky way (mw) highlight the need for compact, flexible, non-parametric descriptions of phase-space distributions of galaxies. we present a new representation of the current dark matter (dm) distribution and potential derived from n-body simulations of the mw and large magel... | quantifying the impact of the large magellanic cloud on the structure of the milky way's dark matter halo using basis function expansions |
the recent measurement of helium-4 from the near-infrared spectroscopy of extremely metal-poor galaxies by the subaru survey may point to a new puzzle in the early universe. we exploit this new helium measurement together with the percent-level determination of primordial deuterium, to assess indications for a nonvanis... | indications for a nonzero lepton asymmetry from extremely metal-poor galaxies |
we consider the finite interactions of the generalized proca theory including the sixth-order lagrangian and derive the full linear perturbation equations of motion on the flat friedmann-lemaître-robertson-walker background in the presence of a matter perfect fluid. by construction, the propagating degrees of freedom (... | effective gravitational couplings for cosmological perturbations in generalized proca theories |
we address the origin of ultra-diffuse galaxies (udgs), which have stellar masses typical of dwarf galaxies but effective radii of milky way-sized objects. their formation mechanism, and whether they are failed l⋆ galaxies or diffuse dwarfs, are challenging issues. using zoom-in cosmological simulations from the numeri... | nihao - xi. formation of ultra-diffuse galaxies by outflows |
we construct a self-interacting dark matter model that could simultaneously explain the observed muon anomalous magnetic moment. it is based on a gauged u{(1)}_{l_{μ }-{l}_{τ }} extension of the standard model, where we introduce a vector-like pair of fermions as the dark matter candidate and a new higgs boson to break... | self-interacting dark matter and muon ( g - 2) in a gauged u{(1)}_{l_{μ }-{l}_{τ }} model |
we study the small scale structure of axion dark matter in the post-inflationary scenario, which predicts the formation of low-mass, high density clumps of gravitationally bound axions called axion miniclusters. to this end we follow numerically the cosmological evolution of the axion field and the network of strings a... | early seeds of axion miniclusters |
a search is presented for new particles produced at the lhc in proton-proton collisions at $\sqrt{s} =$ 13 tev, using events with energetic jets and large missing transverse momentum. the analysis is based on a data sample corresponding to an integrated luminosity of 101 fb$^{-1}$, collected in 2017-2018 with the cms d... | search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at $\\sqrt{s} = $ 13 tev |
we study a simple model of thermal dark matter annihilating to standard model neutrinos via the neutrino portal. a (pseudo-)dirac sterile neutrino serves as a mediator between the visible and the dark sectors, while an approximate lepton number symmetry allows for a large neutrino yukawa coupling and, in turn, efficien... | thermal dark matter through the dirac neutrino portal |
we investigate asymptotic safety of a toy model of a singlet-scalar extension of the higgs sector including two real scalar fields under the impact of quantum-gravity fluctuations. employing functional renormalization group techniques, we search for fixed points of the system which provide a tentative ultraviolet compl... | quantum gravity fluctuations flatten the planck-scale higgs potential |
a search for dark matter particles is performed using events with a z boson candidate and large missing transverse momentum. the analysis is based on proton-proton collision data at a center-of-mass energy of 13te , collected by the cms experiment at the lhc in 2016-2018, corresponding to an integrated luminosity of 13... | search for dark matter produced in association with a leptonically decaying z boson in proton-proton collisions at √{s }=13 te |
the electroweak (ew) sector of the minimal supersymmetric standard model (mssm) can account for a variety of experimental data. the ew particles with masses of a few hundred gev evade the lhc searches owing to their small production cross sections. such a light ew sector can in particular explain the reinforced 4.2 σ d... | (g-2 ) μ and susy dark matter: direct detection and collider search complementarity |
the qcd axion is one of the most compelling candidates to explain the dark matter abundance of the universe. with its extremely small mass (≪1 ev /c2 ), axion dark matter interacts as a classical field rather than a particle. its coupling to photons leads to a modification of maxwell's equations that can be measured wi... | projected sensitivity of dmradio-m3 : a search for the qcd axion below 1 μ ev |
we continue the study of weakly interacting massive particles (wimp) started in bottaro et al. (eur phys j c 82:31, 2022), focusing on a single complex electroweak n-plet with non-zero hypercharge added to the standard model. the minimal splitting between the dark matter and its electroweak neutral partner required to ... | the last complex wimps standing |
we analyse strongly lensed images in eight galaxy clusters to measure their dark matter density profiles in the radial region between 10 kpc and 150 kpc, and use this to constrain the self-interaction cross-section of dark matter (dm) particles. we infer the mass profiles of the central dm haloes, bright central galaxi... | a stringent upper limit on dark matter self-interaction cross-section from cluster strong lensing |
axions are hypothetical particles that were proposed to solve the strong charge-parity problem in high-energy physics. although they have long been known in quantum field theory, axions have so far not been observed as elementary particles in nature. yet, in condensed-matter systems, axions can also emerge as quasipart... | axion physics in condensed-matter systems |
cosine is a dark matter search experiment based on an array of low background nai(tl) crystals located at the yangyang underground laboratory. the assembly of cosine-100 was completed in the summer of 2016 and the detector is currently collecting physics quality data aimed at reproducing the dama/libra experiment that ... | initial performance of the cosine-100 experiment |
we use the nihao (numerical investigation of hundred astrophysical objects) cosmological simulations to investigate the effects of baryonic physics on the time evolution of dark matter central density profiles. the sample is made of ≈70 independent high-resolution hydrodynamical simulations of galaxy formation and cove... | nihao - iv: core creation and destruction in dark matter density profiles across cosmic time |
we introduce a novel program of fixed-target searches for thermal-origin dark matter (dm), which couples inelastically to the standard model. since the dm only interacts by transitioning to a heavier state, freeze-out proceeds via coannihilation and the unstable heavier state is depleted at later times. for sufficientl... | testing light dark matter coannihilation with fixed-target experiments |
we explain the 750 gev diphoton resonance in the context of the dark left-right symmetric model. a global symmetry in this model, stabilizes the dark matter and ensures that the scalar couples dominantly to gluons and photons. the branching fraction of the scalar to diphoton is large as a consequence of the symmetries ... | 750 gev resonance in the dark left-right model |
the next generation of dark matter direct detection experiments will be sensitive to both coherent neutrino-nucleus and neutrino-electron scattering. this will enable them to explore aspects of solar physics, perform the lowest energy measurement of the weak angle sin2 θ wto date, and probe contributions from new theor... | physics from solar neutrinos in dark matter direct detection experiments |
we report the result of a blinded search for weakly interacting massive particles (wimps) using the majority of the supercdms soudan data set. with an exposure of 1690 kg d, a single candidate event is observed, consistent with expected backgrounds. this analysis (combined with previous ge results) sets an upper limit ... | results from the super cryogenic dark matter search experiment at soudan |
a search is presented for new particles produced at the lhc in proton-proton collisions at √{s } = 13 tev, using events with energetic jets and large missing transverse momentum. the analysis is based on a data sample corresponding to an integrated luminosity of 101 fb−1, collected in 2017-2018 with the cms detector. m... | search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at √{s } = 13 tev |
the james webb space telescope (jwst) promises to revolutionize our understanding of the early universe, and contrasting its upcoming observations with predictions of the λ cold dark matter model requires detailed theoretical forecasts. here, we exploit the large dynamic range of the illustristng simulation suite, tng5... | high-redshift jwst predictions from illustristng: dust modelling and galaxy luminosity functions |
the cosmological scenario where the peccei-quinn symmetry is broken after inflation is investigated. in this scenario, topological defects such as strings and domain walls produce a large number of axions, which contribute to the cold dark matter of the universe. the previous estimations of the cold dark matter abundan... | axion dark matter from topological defects |
we perform lattice studies of the gauge theory with sp(4) gauge group and two flavours of (dirac) fundamental matter. the global su(4) symmetry is spontaneously broken by the fermion condensate. the dynamical wilson fermions in the lattice action introduce a mass that breaks the global symmetry also explicitly. the res... | sp (4) gauge theories on the lattice: nf = 2 dynamical fundamental fermions |
the xenon1t experiment searches for dark matter particles through their scattering off xenon atoms in a 2 metric ton liquid xenon target. the detector is a dual-phase time projection chamber, which measures simultaneously the scintillation and ionization signals produced by interactions in target volume, to reconstruct... | xenon1t dark matter data analysis: signal and background models and statistical inference |
lux-zeplin (lz) is a second-generation direct dark matter experiment with spin-independent wimp-nucleon scattering sensitivity above 1.4 ×10-48 cm2 for a wimp mass of 40 gev/c2 and a 1000 days exposure. lz achieves this sensitivity through a combination of a large 5.6 t fiducial volume, active inner and outer veto syst... | the lux-zeplin (lz) radioactivity and cleanliness control programs |
we explore the presence of self-interacting bosonic dark matter (dm) within neutron stars (nss) in light of the latest mass-radius measurements of the neutron star interior composition explorer (nicer). the bosonic dm is distributed as a core inside the ns or as a halo around it leading to formation of a dm admixed ns.... | bosonic dark matter in light of the nicer precise mass-radius measurements |
alternatives to the cold, collisionless dark matter (dm) paradigm in which dm behaves as a collisional fluid generically suppress small-scale structure. herein we use the observed population of milky way (mw) satellite galaxies to constrain the collisional nature of dm, focusing on dm-baryon scattering. we first derive... | constraints on dark matter microphysics from the milky way satellite population |
the fine-structure constant and the electron mass in string theory are determined by the values of scalar fields called moduli. if the dark matter takes on the form of such a light modulus, it oscillates with a frequency equal to its mass and an amplitude determined by the local dark-matter density. this translates int... | sound of dark matter: searching for light scalars with resonant-mass detectors |
the cresst experiment, located at laboratori nazionali del gran sasso in italy, searches for dark matter particles via their elastic scattering off nuclei in a target material. the cresst target consists of scintillating cawo$_4$ crystals, which are operated as cryogenic calorimeters at millikelvin temperatures. each i... | first results on low-mass dark matter from the cresst-iii experiment |
current and upcoming radio telescopes will map the spatial distribution of cosmic neutral hydrogen (h i) through its 21 cm emission. in order to extract the maximum information from these surveys, accurate theoretical predictions are needed. we study the abundance and clustering properties of h i at redshifts z ≤ 5 usi... | ingredients for 21 cm intensity mapping |
in this paper we provide a combined explanation of charged- and neutral-current b-physics anomalies assuming the presence of a light sterile neutrino nrwhich contributes to the b → d (*) τν processes. we focus in particular on two simplified models, where the mediator of the flavour anomalies is either a vector leptoqu... | combined explanations of b-physics anomalies: the sterile neutrino solution |
the recent interest in a light gauge boson in the framework of an extra u(1) symmetry motivates searches in the mass range below 1 gev. we present a search for such a particle, the dark photon, in e+e- → uγ, u →π+π- based on 28 million e+e- →π+π- γ events collected at daφne by the kloe experiment. the π+π- production b... | limit on the production of a new vector boson in e+e- → uγ, u → π+π- with the kloe experiment |
the λcdm model, or concordance cosmology, as it is often called, is a paradigm at its maturity. it is clearly able to describe the universe at large scale, even if some issues remain open, such as the cosmological constant problem, the small-scale problems in galaxy formation, or the unexplained anomalies in the cmb. λ... | small scale problems of the λcdm model: a short review |
snd@lhc is an approved experiment equipped to detect scatterings of neutrinos produced in the far-forward direction at the lhc, and aimed to measure their properties. in addition, the detector has a potential to search for new feebly interacting particles (fips) that may be produced in proton-proton collisions. in this... | searches for new physics at snd@lhc |
direct detection experiments obtain 90% upper limits on the elastic scattering cross sections of dark matter with nucleons assuming point-like interactions and standard astrophysical and cosmological parameters. in this paper we provide a recasting of the limits from xenon1t, pico-60, cresst-iii and darkside-50 and inc... | recasting direct detection limits within micromegas and implication for non-standard dark matter scenarios |
if a light axion is present during inflation and becomes part of dark matter afterwards, its quantum fluctuations contribute to dark matter isocurvature. in this article, we introduce a whole new suite of cosmological observables for axion isocurvature, which could help test the presence of axions, as well as its coupl... | new inflationary probes of axion dark matter |
the nature of dark matter and the fundamental quantum structure of spacetime could be directly linked in the asymptotic-safety framework. a toy model for the visible higgs-yukawa sector of the standard model, coupled to a dark sector through a portal coupling, provides a very first example for a model that simultaneous... | safety in darkness: higgs portal to simple yukawa systems |
we propose using interferometry of circularly polarized light as a mechanism by which to test for axion dark matter. these interferometers differ from standard interferometers only by the addition of a few quarter wave plates to preserve the polarization of light upon reflection. we show that using current technology, ... | axion interferometry |
we consider dark sector particles (dsps) that obtain sizeable interactions with standard model fermions from a new mediator. while these particles can avoid observation in direct detection experiments, they are strongly constrained by lhc measurements. we demonstrate that there is an important complementarity between s... | constraining dark sectors with monojets and dijets |
metallic nanostructures provide a toolkit for the generation of coherent light below the diffraction limit. plasmonic based lasing relies on the population inversion of emitters (such as organic fluorophores) along with feedback provided by plasmonic resonances. in this regime, known as weak light matter coupling, the ... | plasmon-exciton-polariton lasing |
we evaluate the efficiency of axion production from spatially random initial conditions in the axion field, so a network of axionic strings is present. for the first time, we perform numerical simulations which fully account for the large short-distance contributions to the axionic string tension, and the resulting den... | the dark-matter axion mass |
results of a search for physics beyond the standard model in events containing an energetic photon and large missing transverse momentum with the atlas detector at the large hadron collider are reported. as the number of events observed in data, corresponding to an integrated luminosity of 36.1 fb^{-1} of proton-proton... | search for dark matter at √{s}=13 tev in final states containing an energetic photon and large missing transverse momentum with the atlas detector |
we derive new limits on the elastic scattering cross section between baryons and dark matter using cosmic microwave background data from the planck satellite and measurements of the lyman-alpha forest flux power spectrum from the sloan digital sky survey. our analysis addresses generic cross sections of the form σ ∝vn ... | probing sub-gev dark matter-baryon scattering with cosmological observables |
characterizing the local internal environment surrounding solid-state spin defects is crucial to harnessing them as nanoscale sensors of external fields. this is especially germane to the case of defect ensembles which can exhibit a complex interplay between interactions, internal fields, and lattice strain. working wi... | imaging the local charge environment of nitrogen-vacancy centers in diamond |
we present the first simulations within an effective theory of structure formation (ethos), which includes the effect of interactions between dark matter and dark radiation on the linear initial power spectrum and dark matter self-interactions during non-linear structure formation. we simulate a milky way-like halo in ... | ethos - an effective theory of structure formation: dark matter physics as a possible explanation of the small-scale cdm problems |
we present a minimal extension of the standard model (sm) providing a consistent picture of particle physics from the electroweak scale to the planck scale and of cosmology from inflation until today. three right-handed neutrinos ni, a new color triplet q and a complex sm-singlet scalar σ, whose vacuum expectation valu... | standard model—axion—seesaw—higgs portal inflation. five problems of particle physics and cosmology solved in one stroke |
this article reports the measurement of the ionization quenching factor in germanium for nuclear recoil energies in the kev range. precise knowledge of this factor in this energy range is highly relevant for coherent elastic neutrino-nucleus scattering and low mass dark matter searches with germanium-based detectors. n... | direct measurement of the ionization quenching factor of nuclear recoils in germanium in the kev energy range |
dark matter with planck-scale mass (≃1019 gev /c2 ) arises in well-motivated theories and could be produced by several cosmological mechanisms. a search for multiscatter signals from supermassive dark matter was performed with a blind analysis of data collected over a 813 d live time with deap-3600, a 3.3 t single-phas... | first direct detection constraints on planck-scale mass dark matter with multiple-scatter signatures using the deap-3600 detector |
one of the key questions in observational cosmology is the identification of the sources responsible for ionization of the universe after the cosmic ‘dark ages’, when the baryonic matter was neutral. the currently identified distant galaxies are insufficient to fully reionize the universe by redshift z ≈ 6 (refs 1, 2, ... | eight per cent leakage of lyman continuum photons from a compact, star-forming dwarf galaxy |
bosonic ultralight dark matter (uldm) would form cored density distributions at the center of galaxies. these cores, seen in numerical simulations, admit analytic description as the lowest energy bound state solution ("soliton") of the schroedinger-poisson equations. numerical simulations of uldm galactic halos find em... | galactic rotation curves versus ultralight dark matter: implications of the soliton-host halo relation |
we present pandax-ii constraints on candidate wimp-nucleon effective interactions involving the nucleon or wimp spin, including, in addition to standard axial spin-dependent (sd) scattering, various couplings among vector and axial currents, magnetic and electric dipole moments, and tensor interactions. the data set co... | pandax-ii constraints on spin-dependent wimp-nucleon effective interactions |
cosmological observations indicate that dark matter makes up 85% of all matter in the universe yet its microscopic composition remains a mystery. dark matter could arise from ultralight quantum fields that form macroscopic objects. here we use the global positioning system as a 50,000 km aperture dark matter detector t... | search for domain wall dark matter with atomic clocks on board global positioning system satellites |
we build models where dark matter candidates arise as composite states of a new confining gauge force, stable thanks to accidental symmetries. restricting to renormalizable theories compatible with su(5) unification, we find 13 models based on su( n) gauge theories and 9 based on so( n). we also describe other models t... | accidental composite dark matter |
sabre aims to directly measure the annual modulation of the dark matter interaction rate with nai(tl) crystals. a modulation compatible with the standard hypothesis, in which our galaxy is immersed in a dark matter halo, has been measured by the dama experiment in the same target material. other direct detection experi... | the sabre project and the sabre proof-of-principle |
it has been shown that the longitudinal mode of a massive vector boson can be produced by inflationary fluctuations and account for the dark matter content of the universe. in this work we examine the possibility of instead producing the transverse mode via the coupling phi f ~ f between the inflaton and the vector fie... | vector dark matter production at the end of inflation |
we analyse the baryon acoustic oscillation (bao) signal of the final baryon oscillation spectroscopic survey (boss) data release (dr12). our analysis is performed in the fourier space, using the power spectrum monopole and quadrupole. the data set includes 1198 006 galaxies over the redshift range 0.2 < z < 0.75.... | the clustering of galaxies in the completed sdss-iii baryon oscillation spectroscopic survey: baryon acoustic oscillations in the fourier space |
this work studies the formation and growth of boson stars and their surrounding miniclusters by gravitational condensation using nonlinear dynamical numerical methods. fully dynamical attractive and repulsive self-interactions are also considered for the first time. in the case of pure gravity, we numerically prove tha... | new insights into the formation and growth of boson stars in dark matter halos |
we investigate the possibility that the dark matter candidate is from a pure non-abelian gauge theory of the hidden sector, motivated in large part by its elegance and simplicity. the dark matter is the lightest bound state made of the confined gauge fields, the hidden glueball. we point out that this simple setup is c... | hidden su (n ) glueball dark matter |
we study the angular-momentum (am) buildup in high-z massive galaxies using high-resolution cosmological simulations. the am originates in co-planar streams of cold gas and merging galaxies tracing cosmic-web filaments, and it undergoes four phases of evolution. (i) outside the halo virial radius (rv ∼ 100 kpc), the el... | four phases of angular-momentum buildup in high-z galaxies: from cosmic-web streams through an extended ring to disc and bulge |
early data releases of jwst have revealed several high redshift massive galaxy candidates by photometry, and some of them have been confirmed spectroscopically. we study their implications on the primordial power spectrum. in the first part, we use the ceers photometric survey data, along with respective spectroscopic ... | primordial power spectrum in light of jwst observations of high redshift galaxies |
deap-3600 is a single-phase liquid argon (lar) direct-detection dark matter experiment, operating 2 km underground at snolab (sudbury, canada). the detector consists of 3279 kg of lar contained in a spherical acrylic vessel. this paper reports on the analysis of a 758 tonne .day exposure taken over a period of 231 live... | search for dark matter with a 231-day exposure of liquid argon using deap-3600 at snolab |
we present a search for dark matter particles with sub-gev/$c^2$ masses whose interactions have final state electrons using the darkside-50 experiment's (12306 $\pm$ 184) kg d low-radioactivity liquid argon exposure. by analyzing the ionization signals, we exclude new parameter space for the dark matter-electron cross ... | search for dark matter particle interactions with electron final states with darkside-50 |
the recent detection of an anomalously strong 21-cm signal of neutral hydrogen from cosmic dawn by the edges low-band radio experiment can be explained if cold dark matter particles scattered off the baryons draining excess energy from the gas. in this letter we explore the expanded range of the 21-cm signal that is op... | constraining baryon-dark-matter scattering with the cosmic dawn 21-cm signal |
we examine the effects of stellar feedback and bursty star formation on low-mass galaxies (mstar = 2 × 106 - 5 × 1010 m⊙) using the feedback in realistic environments (fire) simulations. while previous studies emphasized the impact of feedback on dark matter profiles, we investigate the impact on the stellar component:... | breathing fire: how stellar feedback drives radial migration, rapid size fluctuations, and population gradients in low-mass galaxies |
in the first stages of inflationary reheating, the temperature of the radiation produced by inflaton decays is typically higher than the commonly defined reheating temperature tr h∼(γϕmp)1/2 where γϕ is the inflaton decay rate. we consider the effect of particle production at temperatures at or near the maximum tempera... | enhancement of the dark matter abundance before reheating: applications to gravitino dark matter |
neutron stars contain a significant number of stable muons due to the large chemical potential and degenerate electrons. this makes them the unique vessel to capture muonphilic dark matter, which does not interact with other astrophysical objects, including earth and its direct-detection experiments. the infalling dark... | dark matter interactions with muons in neutron stars |
we study the impact that future lepton flavor violating experiments will have on the viable parameter space of the scotogenic model. within this model, the dark matter particle is assumed to be the lightest singlet fermion and two cases are considered depending on how its relic density is obtained: via self-annihilatio... | probing the scotogenic model with lepton flavor violating processes |
we fit the rotation curves of isolated dwarf galaxies to directly measure the stellar mass-halo mass relation (m⋆-m200) over the mass range 5 × 105 ≲ m⋆/m⊙ ≲ 108. by accounting for cusp-core transformations due to stellar feedback, we find a monotonic relation with little scatter. such monotonicity implies that abundan... | the stellar mass-halo mass relation of isolated field dwarfs: a critical test of λcdm at the edge of galaxy formation |
baryon and lepton numbers being accidental global symmetries of the standard model (sm), it is natural to promote them to local symmetries. however, to preserve anomaly-freedom, only combinations of b-l are viable. in this spirit, we investigate possible dark matter realizations in the context of the u(1)_b{-l} model: ... | nlo+nll collider bounds, dirac fermion and scalar dark matter in the b-l model |
at the end of inflation, the inflaton field decays into an initially nonthermal population of relativistic particles which eventually thermalize. we consider the production of dark matter via freeze-in from this relativistic plasma, focusing on the prethermal phase. we find that for a production cross section σ (e )∼en... | prethermalization production of dark matter |
the ultra-diffuse galaxy ngc1052-df2 has a very low velocity dispersion, indicating that it has little or no dark matter. here we report the discovery of a second galaxy in this class, residing in the same group. ngc1052-df4 closely resembles ngc1052-df2 in terms of its size, surface brightness, and morphology; has a s... | a second galaxy missing dark matter in the ngc 1052 group |
in the cold dark matter cosmology, the baryonic components of galaxies—stars and gas—are thought to be mixed with and embedded in non-baryonic and non-relativistic dark matter, which dominates the total mass of the galaxy and its dark-matter halo. in the local (low-redshift) universe, the mass of dark matter within a g... | strongly baryon-dominated disk galaxies at the peak of galaxy formation ten billion years ago |
an ultralight bosonic particle of mass around $10^{-22}\, \mathrm{ev}/c^2$ is of special interest as a dark matter candidate, as it both has particle physics motivations, and may give rise to notable differences in the structures on highly non-linear scales due to the manifestation of quantum-physical wave effects on m... | structure formation in large-volume cosmological simulations of fuzzy dark matter: impact of the non-linear dynamics |
motivated by recent supersymmetry (susy) search results, which prefer most susy particles to be heavy, and the muon g-2 anomaly, which prefers colorless susy particles to be light, we explore the status of a light smuon (the susy partner of a left-handed muon lepton) in the next-to-minimal supersymmetric standard model... | smuon in the nmssm confronted with the muon g-2 anomaly and susy searches |
we report results on the searches of weakly interacting massive particles (wimps) with sub-gev masses (mχ) via wimp-nucleus spin-independent scattering with migdal effect incorporated. analysis on time-integrated (ti) and annual modulation (am) effects on cdex-1b data are performed, with 737.1 kg day exposure and 160 e... | constraints on spin-independent nucleus scattering with sub-gev weakly interacting massive particle dark matter from the cdex-1b experiment at the china jinping underground laboratory |
a number of lhc resonance search channels display an excess in the invariant mass region of 1.8-2.0 tev. among them is a 3.4 σ excess in the fully hadronic decay of a pair of standard model electroweak gauge bosons, in addition to potential signals in the hw anddijetfinalstates. weperformamodel-independentcross-section... | symmetry restored in dibosons at the lhc? |
we explore the cosmological signatures associated with the twin baryons, electrons, photons and neutrinos in the mirror twin higgs framework. we consider a scenario in which the twin baryons constitute a subcomponent of dark matter, and the contribution of the twin photon and neutrinos to dark radiation is suppressed d... | cosmological signatures of a mirror twin higgs |
in this study we consider an extension of the standard model with a complex hypercharge zero triplet scalar. in this scenario one of the charged higgs bosons remains purely triplet and does not couple to the fermions, making it elusive at colliders. also the physical pseudoscalar is a pure triplet and this purity makes... | obscure higgs boson at colliders |
precise measurements of the temperature and polarization anisotropies of the cosmic microwave background can be used to constrain the annihilation and decay of dark matter. in this work, we demonstrate via principal component analysis that the imprint of dark matter decay on the cosmic microwave background can be appro... | general constraints on dark matter decay from the cosmic microwave background |
searches for invisible higgs decays at the large hadron collider constrain dark matter higgs-portal models, where dark matter interacts with the standard model fields via the higgs boson. while these searches complement dark matter direct-detection experiments, a comparison of the two limits depends on the coupling of ... | improved limits for higgs-portal dark matter from lhc searches |
the dominant neutrino fluxes at earth from different sources are reviewed and the grand unified neutrino spectrum ranging from mev to pev energies is presented. for each energy band and source, both theoretical expectations and experimental data are discussed. this compact review serves as a reference to those interest... | grand unified neutrino spectrum at earth: sources and spectral components |
the qcd axion is a good dark matter candidate. the observed dark matter abundance can arise from misalignment or defect mechanisms, which generically require an axion decay constant fa∼o (1011) gev (or higher). we introduce a new cosmological origin for axion dark matter, parametric resonance from oscillations of the p... | qcd axion dark matter with a small decay constant |
recently a population of large, very low surface brightness, spheroidal galaxies was identified in the coma cluster. the apparent survival of these ultra-diffuse galaxies (udgs) in a rich cluster suggests that they have very high masses. here, we present the stellar kinematics of dragonfly 44, one of the largest coma u... | a high stellar velocity dispersion and ∼100 globular clusters for the ultra-diffuse galaxy dragonfly 44 |
we study production of self-interacting dark matter (dm) during an early matter-dominated phase. as a benchmark scenario, we consider a model where the dm consists of singlet scalar particles coupled to the visible standard model (sm) sector via the higgs portal. we consider scenarios where the initial dm abundance is ... | phenomenology of self-interacting dark matter in a matter-dominated universe |
it has been suggested that certain antiferromagnetic topological insulators contain axion quasiparticles (aqs), and that such materials could be used to detect axion dark matter (dm). the aq is a longitudinal antiferromagnetic spin fluctuation coupled to the electromagnetic chern-simons term, which, in the presence of ... | axion quasiparticles for axion dark matter detection |
the milky way's satellite galaxies ("surviving dwarfs") have been studied for decades as unique probes of chemical evolution in the low-mass regime. here we extend such studies to the "disrupted dwarfs", whose debris constitutes the stellar halo. we present abundances ([fe/h], [$\alpha$/fe]) and stellar masses for nine... | live fast, die $\\alpha$-enhanced: the mass-metallicity-$\\alpha$ relation of the milky way's disrupted dwarf galaxies |
the polarization analysis of optical transitions in monolayer and bilayer transition-metal dichalcogenides provides invaluable information on the spin and valley (pseudospin) degrees of freedom. to explain optical properties of a given monolayer transition-metal dichalcogenide, one should consider (i) the order of its ... | polarization analysis of excitons in monolayer and bilayer transition-metal dichalcogenides |
a number of recent, low-redshift, lensing measurements hint at a universe in which the amplitude of lensing is lower than that predicted from the λcdm model fit to the data of the planck cmb mission. here we use the auto- and cross-correlation signal of unwise galaxies and planck cmb lensing maps to infer cosmological ... | cosmological constraints from unwise and planck cmb lensing tomography |
we propose and study a new class of superconducting detectors that are sensitive to o (mev ) electron recoils from dark matter-electron scattering. such devices could detect dark matter as light as the warm dark-matter limit, mx≳1 kev . we compute the rate of dark-matter scattering off of free electrons in a (supercond... | superconducting detectors for superlight dark matter |
we present the first results of a search for invisible axion dark matter using a multiple-cell cavity haloscope. this cavity concept was proposed to provide a highly efficient approach to high-mass regions compared to the conventional multiple-cavity design, with larger detection volume, simpler detector setup, and a u... | search for invisible axion dark matter with a multiple-cell haloscope |
dark matter may reside in sector without standard model (sm) gauge interactions. one way in which such a dark sector can still impact sm particles through non-gravitational interactions is via the "photon portal" in which a dark photon kinetically mixes with the ordinary sm photon. we study the implications of this set... | constraining photon portal dark matter with texono and coherent data |
we comprehensively study experimental constraints and prospects for a class of minimal hidden sector dark matter (dm) models, highlighting how the cosmological history of these models informs the experimental signals. we study simple `secluded' models, where the dm freezes out into unstable dark mediator states, and co... | looking for the wimp next door |
we present results of a dark matter search performed with a 0.6 kg d exposure of the damic experiment at the snolab underground laboratory. we measure the energy spectrum of ionization events in the bulk silicon of charge-coupled devices down to a signal of 60 ev electron equivalent. the data are consistent with radiog... | search for low-mass wimps in a 0.6 kg day exposure of the damic experiment at snolab |
we study the gravitational production of super-hubble-mass dark matter in the very early universe. we first review the simplest scenario where dark matter is produced mainly during slow roll inflation. then we move on to consider the cases where dark matter is produced during the transition period between inflation and... | gravitational production of superheavy dark matter and associated cosmological signatures |
starting with the de broglie-proca lagrangian for a massive vector field, we calculate the number density of particles resulting from gravitational particle production (gpp) during inflation, with detailed consideration to the evolution of the number density through the reheating. we find plausible scenarios for the pr... | completely dark photons from gravitational particle production during the inflationary era |
we investigate the search prospects for new scalars beyond the standard model at the large hadron collider (lhc). in these studies two real scalars s and χ have been introduced in a two higgs-doublet model (2hdm), where s is a portal to dark matter (dm) through its interaction with χ , a dm candidate and a possible sou... | phenomenological signatures of additional scalar bosons at the lhc |
collective excitations in condensed matter systems, such as phonons and magnons, have recently been proposed as novel detection channels for light dark matter. we show that excitation of (i) optical phonon polaritons in polar materials in an o (1 t ) magnetic field (via the axion-photon coupling), and (ii) gapped magno... | detectability of axion dark matter with phonon polaritons and magnons |
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