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dark matter is a hypothetical particle proposed to explain the missing matter expected from the cosmological observation. the motivation of dark matter is overwhelming however as it is mainly deduced from its gravitational interaction, for it does little to pinpoint what dark matter really is. in wimps miracle, weakly ... | dark matter searches at the large hadron collider |
the strong cp problem can be resolved by introducing an additional global symmetry known as peccei-quinn symmetry. once pq symmetry is broken the associated particle, the qcd axion, is a plausible dark matter candidate. calculating the cosmological energy density of the axion requires nonperturbative qcd input---the hi... | lattice qcd and axion cosmology |
paraparticles of order p = 2 must be pair produced, so the least massive are absolutely stable. consequently, paraparticles are excellent candidates to be associated with dark matter and/or dark energy. for a fixed number of paraparticles, in a "generalized ray space" there are simple orthonormal bracket "ray represent... | generalized ray spaces for paraparticles |
evidence has continued to accumulate over the last few decades as to the existence and nature of dark matter. depending on the particle candidate, the dark matter can exhibit one of several cosmologically defined models: hot dark matter, cold dark matter, warm dark matter, self-interacting dark matter, and fuzzy dark m... | cosmological dark matter: a review (the april fool edition) |
in the standard model a dark matter candidate is missing, but it is relatively simple to enlarge the model including one or more suitable particles. we consider in this paper one such extension, inspired by simplicity and by the goal to solve more than just the dark matter issue. indeed we consider a local u(1) extensi... | axion and fimp dark matter in a 𝖴(1) extension of the standard model |
dark matter (dm) is largely believed to be the dominant component of the matter content of the universe. astronomical measurements can be utilized to search for standard model (sm) annihilation or decay products of dm, complementing direct and collider-based searches. among dm particle candidates, weakly interacting ma... | veritas dark matter search in dwarf spheroidal galaxies: an extended source analysis |
axions are hypothetical elementary particles that may help provide the answer as to why qcd preserves the discrete symmetries p and cp. light axions also have properties that make them ideal dark-matter candidates. the axion dark matter experiment (admx), has been at the forefront of the search for dark-matter axions f... | an improved low-temperature rf-cavity search for dark-matter axions |
low energy threshold detectors are necessary in many frontier fields of the experimental physics. in particular these are extremely important for probing dark matter (dm) possible candidates. we present a novel detection approach that exploits the energy levels of atoms embedded into solid crystals of inert gases maint... | novel approaches in low energy threshold detectors for dark matter searches |
the dark matter puzzle is one of the most important fundamental physics questions in the 21st century. there is no doubt that solving the puzzle will be a new milestone for human beings in achieving a deeper understanding of nature. herein, we propose the use of the shanghai laser electron gamma source (slegs) to searc... | searching for dark matter particles using compton scattering |
self-interacting dark matter is known as one of the most appropriate candidates for dark matter. due to its excellent success in removing many astrophysical problems, particularly in small scale structure, studying this model has taken on added significance. in this paper, we focus on the results of two previously perf... | super interacting dark sector: an improvement on self-interacting dark matter via scaling relations of galaxy clusters |
many terrestrial experiments have been designed to detect domain walls composed of axions or axionlike particles (alps), which are promising candidates of dark matter. when the domain wall crosses over the earth, the pseudoscalar field of alps could couple to the atomic spins. such exotic spin-dependent couplings can b... | search for topological defect of axionlike model with cesium atomic comagnetometer |
weakly interacting massive particle (wimp) remains one of the most promising dark matter candidates. many experiments around the world are searching for wimps and the best current sensitivity to wimp-nucleon spin-independent cross-section is about 10‑10 pb. lux has been one of the world-leading experiments in the searc... | recent results from lux and prospects for dark matter searches with lz |
dark matter: an introduction tackles the rather recent but fast-growing subject of astroparticle physics, encompassing three main areas of fundamental physics: cosmology, particle physics, and astrophysics. accordingly, the book discusses symmetries, conservation laws, relativity, and cosmological parameters and measur... | dark matter: an introduction |
a generalized theory of electroweak interaction is developed based on the underlying geometrical structure of the tangent bundle with symmetries arising from transformations of tangent vectors along the fiber axis at a fixed spacetime point given by the so(3,1) group. electroweak interaction beyond the standard model (... | extension of the standard model of electroweak interaction and dark matter in the tangent bundle geometry |
we propose a minimal model for the cosmic coincidence problem ωdm/ωb∼5 and neutrino mass in a type-ii seesaw scenario. we extend the standard model of particle physics with a s u (2 ) singlet leptonic dirac fermion χ , which represents the candidate of dark matter (dm), and two triplet scalars δ1 ,2 with hierarchical m... | dark matter to baryon ratio from scalar triplets decay in type-ii seesaw |
dark matter is a milestone in the understanding of the universe and a portal to the discovery of new physics beyond the standard model of particles. the direct search for dark matter has become one of the most active fields of experimental physics in the last few decades. liquid xenon (lxe) detectors demonstrated the h... | the xenon road to direct detection of dark matter at lngs: the xenon project |
frozen susy is the maximally suppressed supersymmetric su(5) grand unified theory coupled to supergravity. in frozen susy, there is only one extra particle in addition to those that appear in the usual non-supersymmetric su(5) grand unified theory coupled to gravity. frozen susy also restricts and improves the mass pre... | frozen susy with susyons as the dark matter |
consequences of the non-hermitian expansion of the dirac equation in which the mass term is written in the form m → m1 + γ5m2 are considered. it is shown that such procedure inevitably leads to violation of the weak equivalence principle, i.e., causes an inequality of gravitational and inert fermion masses. however, if... | violation of the equivalence principle in non-hermitian fermion theory |
bosonic super-weakly interacting massive particles (wimps), including pseudoscalar and vector particles, are dark-matter candidates. to date, many underground experiments searches for super-wimps have been performed in the mass range of a few kev /c2 to 1 mev /c2 . all these searches utilize the absorption process of a... | lifetime control in silicon power devices by electron or gamma irradiation |
the recent results of icecube neutrino observatory include an excess of pev neutrino events which appear to follow a broken power-law different from the other lower energy neutrinos detected by icecube. the possible astrophysical source of these neutrinos is still unknown. one possible source of such neutrinos could be... | estimation of baryon asymmetry from dark matter decaying into icecube neutrinos |
the time projection method is an ideal candidate to track low energy release particles. large volumes can be readout by means of a moderate number of channels providing a complete 3d reconstruction of the charged tracks within the sensitive volume. it allows the measurement not only of the total released energy but als... | mpgd optical read out for directional dark matter search |
we consider a minimal vectorlike extension of the standard model that naturally contains two types of stable neutral particles. they can be interpreted as the dark matter candidates. here, the sm is supplemented by a new fermion (h-quark) sector that is in confilnement providing by the su(2)hc gauge group. h-quarks int... | two-component dark matter in the vectorlike hypercolor extension of the standard model |
the general antiparticle spectrometer (gaps) is a balloon-borne cosmic-ray antimatter experiment that uses the exotic atom technique, eliminating the requirement for strong b-fields used by conventional magnetic spectrometers. it will be sensitive to antideuterons with kinetic energies of 0.05-0.25 gev / nucleon, which... | recent progress on the gaps time of flight system |
i study a class of randall-sundrum (rs) models with spontaneous breaking of scale invariance (sbsi). this class of models implements the contino-pomarol-rattazzi (cpr) mechanism to achieve sbsi through the small running of an external close-to-marginal scale-breaking operator that leads to a light dilaton/radion with c... | the radion as a dark matter candidate |
the lep experiment at cern provided accurate measurements of the z neutral gauge boson properties. although all measurements agree well with the sm predictions, the forward-backward asymmetry of the bottom-quark remains almost 3σ away from the sm value. we proposed that this anomaly may be explained by the existence of... | bottom-quark forward-backward asymmetry, dark matter and the lhc |
we review a possible non-minimal coupling (dilatonic) of a scalar field (axion like particle) to electromagnetism, through experimental and observational constraints. such a coupling is motivated from recent quasar spectrum observations that indicate a possible spatial and/or temporal variation of the fine-structure co... | constraints on scalar coupling to electromagnetism |
in january, 2018, fornal and grinstein proposed that a previously unobserved neutron decay branch to a dark matter particle (χ) could account for the discrepancy in the neutron lifetime observed in two different types of experiments. one of the possible final states discussed includes a single χ along with an e+e- pair... | search for neutron dark decay: n → χ + e+e- |
we investigate supersymmetric models with left-right symmetry based on the group su(4)c × su(2)l × su(2)r (4-2-2) with negative sign of bilinear higgs potential parameter μ in the context of the latest experimental results. in the backdrop of experimental results from the large hadron collider, we investigate the possi... | yukawa unification with light supersymmetric particles consistent with lhc constraints |
we analyse new signals of dark matter (dm) at the large hadron collider (lhc) in a 3-higgs doublet model (3hdm) where only one doublet acquires a vacuum expectation value (vev), preserving a parity $z_2$. the other two doublets are inert and do not develop a vev, leading to a dark scalar sector controlled by $z_2$, wit... | dark matter signals at the lhc from a 3hdm |
scintillation crystals are commonly used for direct detection of weakly interacting massive particles (wimps), which are suitable candidates for a particle dark matter. it is well known that the scintillation light yields are different for electron recoil and nuclear recoil. to calibrate the energies of wimp-induced nu... | quenching factor measurement for nai(tl) scintillation crystal |
two well-motivated dark matter candidates are weakly interacting massive particles (wimps) and weakly interacting sub-ev particles (wisps) (e.g. axions). a new gamma-ray telescope that is optimized for mev energies would allow us to explore new areas of dark matter parameter space and provide unprecedented access to it... | looking under a better lamppost: mev-scale dark matter candidates |
one possible and natural derivation from the collisionless cold dark matter (cdm) standard cosmological framework is the assumption of the existence of interactions between dark matter (dm) and photons or neutrinos. such a possible interacting dark matter (idm) model would imply a suppression of small-scale structures ... | properties of subhalos in the interacting dark matter scenario |
low-energy, self-gravitating solutions of a scalar field coupled to gravity, described by the schrodinger-poisson system, are good candidates for realistic astrophysical structures, being particularly suited to describe dark matter halos. in this work, we study the scenario in which one of these structures is gravitati... | how do scalar-field dark matter halos react to orbiting bodies? |
we study gamma-ray line signatures from electroweakly interacting non-abelian spin-1 dark matter (dm). in this model, z2-odd spin-1 particles including a dm candidate have the su(2)l triplet-like features, and the sommerfeld enhancement is relevant in the annihilation processes. we derive the annihilation cross section... | gamma-ray line from electroweakly interacting non-abelian spin-1 dark matter |
quantum chromodynamics is the fundamental theory to describe strong interaction, where quarks and gluons have the color degrees of freedom. however, a single quark or gluon cannot be separated out and all observable particles are color singlet states. color confinement or quark confinement conjecture can be proved by c... | color confinement, dark matter and the missing anti-matter |
in this talk, a unified model of scalar particles that addresses the flavour hierarchies, solves the strong cp problem, delivers a dark matter candidate, and radiatively triggers electroweak symmetry breaking is discussed. the recently proposed axiflavon is embedded together with an (elementary) goldstone higgs-sector ... | axiflavon-higgs unification |
among various dark matter candidates, bosonic ultralight fields with masses below 1ev are well motivated. recently, a number of novel approaches have been put forward to search for ultralight dark matter candidates using laser interferometers at various scales. those include our proposals to search for axion-like parti... | ultralight dark matter searches with kagra gravitational wave telescope |
various observations from cosmic microwave background radiation (cmbr), type ia supernova and baryon acoustic oscillations (bao) are strongly suggestive of an accelerated expansion of the universe which can be explained by the presence of mysterious energy known as dark energy. the quintessential matter coupled with gr... | geodesics and bending of light around a btz black hole surrounded by quintessential matter |
axion particles are among the best candidates to explain dark matter and resolve the strong c p problem in the standard model. if such a particle exists, the core of stars will produce them in large amounts. for the first time, we predict the axion spectra and their associated luminosities for several low-mass stars—on... | axion spectra and the associated x-ray spectra of low-mass stars |
recently, the so-called hubble tension, i.e. the mismatch between the local and the cosmological measurements of the hubble parameter, has been resolved when non-particle dark matter is considered which has a negative equation of state parameter (ω ≈-0.01 ). we investigate if such a candidate can successfully describe ... | is non-particle dark matter equation of state parameter evolving with time? |
over the course of decades, there has been mounting astronomical evidence for non-baryonic dark matter, yet its precise nature remains elusive. a favored candidate for dark matter is the weakly interacting massive particle (wimp) which arises naturally out of extensions to the standard model. wimps are expected to occa... | the darkside-50 experiment: electron recoil calibrations and a global energy variable |
we consider dark matter as an analog of hydrogen in a secluded sector and study its astrophysical implications. the self interactions between dark matter particles include elastic scatterings as well as inelastic processes from hyperfine transitions. we show that for a dark hydrogen mass in the 10-100 gev range and a d... | atomic dark matter with hyperfine interactions |
with a wealth of astrophysical evidence that confirms that the baryonic matter we understand accounts for only 5% of the matter and energy in the universe, the search is on for the mysterious dark matter, that is said to account for 25% of the universe composition. the leading candidate for dark matter is the weakly in... | digital advances in triggering and data acquisition systems for large scale dark matter search experiments |
light, spin-0 particles are ubiquitous in theories of physics beyond the standard model, and many of these make good candidates for the identity of dark matter. one very well-motivated candidate of this type is the axion. due to their small mass and adherence to bose statistics, axions can coalesce into heavy, gravitat... | phenomenology and astrophysics of gravitationally-bound condensates of axion-like particles |
a search for dark matter particle candidates produced in association with a z boson in proton-proton collisions at the total center-of-mass energy of 13 tev is presented. the search uses 36.1 inverse femtobarn of data collected by the atlas experiment at the large hadron collider in 2015 and 2016. events with large mis... | search for dark matter particle candidates produced in association with a z boson in pp collisions at a center-of-mass energy of 13 tev with the atlas detector |
grand unified theories based on large groups (with rank >= 6) are a natural context for dark matter models. they contain standard-model-singlet fermions that could be dark matter candidates, and can contain new non-abelian interactions whose sphalerons convert baryons, leptons, and dark matter into each other, ``cog... | cogenerating and pre-annihilating dark matter by a new gauge interaction in a unified model |
in this paper, we propose a hybrid mediation and hybrid supersymmetry breaking. in particular, the rg-invariant anomaly mediation is considered. together with additional gravity mediation, the slepton tachyon problem of anomaly mediation is solved automatically. the special properties are that all color sparticles mass... | hybrid anomaly and gravity mediation for electroweak supersymmetry |
the explanation for the origin of families of quarks and leptons and their properties is one of the most promising ways to understand the assumptions of the standard model. the spin-charge-family theory [n. s. m. borštnik, phys. lett. b 292 (1992) 25; j. math. phys. 34 (1993) 3731; int. j. theor. phys. 40 (2001) 315; m... | are superheavy stable quark clusters viable candidates for the dark matter? |
hopf algebra methods are applied to study drinfeld twists of (3+1)-diffeomorphisms and deformed general relativity on commutative manifolds. a classical nonlocality length scale is produced above which microcausality emerges. matter fields are utilized to generate self-consistent abelian drinfeld twists in a background... | commutative deformations of general relativity: nonlocality, causality, and dark matter |
the standard model (sm) describes particle physics with great precision. however, it does not account for the generation of neutrino masses, whose nature we do not understand. both a dirac and a majorana mass term could intervene, leading to the existence of heavy partners of the sm neutrinos, presumably more massive a... | heavy neutrino searches from mev to tev |
an appealing candidate of the galactic dark matter is the axion, which was postulated to solve the strong cp (charge-conjugation parity) violation problem in the standard particle theory. a new experimental method is proposed to determine the axion mass. the method uses collectively and coherently excited atoms or mole... | new method of galactic axion search |
a z2 parity odd real scalar is a good candidate for dark matter in the present universe. we consider models contain two higgs doublet fields and one real scalar dark matter particle with mass in the range of 31 — 40 gev and annihilating into a bb¯ pair, or with about 10 gev mass and annihilating into tau lepton pair. t... | galactic center excess by higgs portal dark matter |
astrophysical observations have demonstrated the existence of dark matter over the past decades. experimental efforts in the search for dark matter are largely focused on the well-motivated weakly interacting massive particles (wimps) as a dark matter candidate. current experiments in direct detection are producing inc... | particle identification using semi-supervised learning in the pico-60 dark matter detector |
the identity of dark matter (dm) is one of the most captivating topics in particle physics today. the r-parity conserving minimal supersymmetric standard model (mssm), which naturally provides a dm candidate in the form of the lightest neutralino ($\tilde{\chi}_{1}^{0}$), is used as a benchmark scenario to show that a ... | connecting particle physics and cosmology: measuring the dark matter relic density in compressed supersymmetry at the lhc |
the theory of universal extra dimensions involves kaluza-klein (kk) particles. the lightest kk particle (lkp) is one of the good candidates for cold dark matter. annihilation of lkp dark matter in the galactic halo produces high-energy gamma-rays. the gamma-ray spectrum shows a characteristic peak structure around the ... | the gamma-ray spectral feature from kaluza-klein dark matter annihilation and its observability |
our slq(2) extension of the standard model is constructed by replacing the elementary field operators, ψ(x), of the standard model by ψ̂mm‧j(x)d mm‧j where dmm‧j is an element of the (2j + 1)-dimensional representation of the slq(2) algebra, which is also the knot algebra. the allowed quantum states (j,m,m‧) are restri... | on the slq(2) extension of the standard model and the concept of charge |
the possibility of heavy neutralino dark matter (dm) in the gravity-mediation mechanism is explored. the appearance of the heavy lightest supersymmetric particle is seemingly suggested by large hadron collider runs, which have not provided evidence of superparticles around the tev region. on the basis of the so-called ... | implications of heavy neutralino dark matter: the underlying structure in the hidden sector |
the exo-higgs model can accommodate a successful baryogenesis mechanism that closely mirrors electroweak baryogenesis in the standard model, but avoids its shortcomings. we extend the exo-higgs model by the addition of a singlet complex scalar χ. in our model, χ can be a viable asymmetric dark matter (adm) candidate. w... | asymmetric dark matter in extended exo-higgs scenarios |
cosmological observations indicate that approximately 27% of the energy density of the universe is in the form of dark matter which is non-baryonic. the nature of dark matter is an open question in modern physics. a well-motivated candidate constituent is a weakly interacting massive particle (wimp) with mass in the ra... | search for gamma-ray signals from dwarf spheroidal galaxies with the cherenkov telescope array |
in this work, we propose different models of extended theories of gravity, which are minimally coupled to the sm fields, to explain the possibility of a dark matter (dm) candidate, without ad-hoc additions to the standard model (sm). we modify the gravity sector by allowing quantum corrections motivated from local $f(r... | from extended theories of gravity to dark matter |
we give a brief review on the interacting dark matter (idm) scenario and its effects on cosmology and particle physics. if dm candidates can have strong self-interactions or interactions with other relativistic particles, we can refer them generally as idm. idm is an interesting possibility that is motivated both theor... | interacting dark matter and dark radiation |
it is shown that gravitation naturally emerges from the standard model of particle physics if local scale invariance is imposed in the context of a single conformal (weyl-symmetric) theory. gravitation is then conformally-related to the standard model via a conformal transformation, merely a function of the number of f... | conformal higgs gravity |
the search for weakly interacting dark matter particle (wimp) candidates produced in association with a z boson with the atlas detector at the lhc is presented. events with large missing transverse momentum and consistent with the decay of a z boson into oppositely charged electron or muon pairs were selected in analys... | search for wimp dark matter produced in association with a z boson with the atlas detector |
massive photon-like particles are predicted in many extensions of the standard model with a hidden sector accounting for dark matter candidates. they have interactions similar to the photon, are vector bosons, and can be produced together with photons. most of the present experimental constraints on the dark photon ( a... | padme: searching for dark mediator at the frascati btf |
in the search for a composite higgs boson in walking technicolor models, many flavor qcd, in particular with nf = 8, is an attractive candidate, and has been found to have a composite flavor-singlet scalar as light as the pion. based on lattice simulations of this theory with the hisq action, we will present our prelim... | lattice study of the scalar and baryon spectra in many-flavor qcd |
in order to obtain a dark matter candidate we propose an extension of the s 3 symmetric 3-higgs doublet model, adding a new scalar doublet, occupying all the irreducible representations of the discrete symmetry. to ensure stability of the dark matter particle we impose an extra z 2 symmetry. we find the analytical mass... | unitarity and stability conditions in a 4-higgs doublet model with an s 3-family symmetry |
dark matter particles can be detected directly via their elastic scattering with nuclei. next generation experiments can eventually find physical evidences about dark matter candidates. with this motivation in mind, we have calculated the expected signals of dark matter particles in xenon detectors. the calculations we... | dark matter, supernova neutrinos and other backgrounds in direct dark matter searches. the andes laboratory prospects |
the most compelling candidates for dark matter to day are wimps and axions. the applicability of gasesous time projection chambers (tpcs) with micromesh gas structures (micromegas) to the search of these particles is explored within this work. both particles would produce an extremely low rate at very low energies in p... | micromegas for dark matter searches: cast/iaxo & trex-dm |
we discuss within the framework of effective four-fermion scalar interaction the phenomenology of a weakly interacting massive particle (wimp) dirac dark matter candidate which is exothermic (i.e., is metastable and interacts with nuclear targets down-scattering to a lower-mass state) and ge-phobic (i.e., whose couplin... | effective scalar four-fermion interaction for ge-phobic exothermic dark matter and the cdms-ii silicon excess |
a simple model is constructed based on the gauge symmetry su(3)c ×su(2)l ×u(1)y ×su(2)ℓ, with only the leptons transforming nontrivially under su(2)ℓ. the extended symmetry is broken down to the standard model gauge group at tev-scale energies. we show that this model provides a mechanism for baryogenesis via leptogene... | dark matter and baryogenesis from non-abelian gauged lepton number |
in this letter we present a novel version of "long-lived" gluinos in supersymmetric models with the gluino lightest ordinary supersymmetric particle (losp) and the axino lightest supersymmetric particle. within certain ranges of the axion decay constant fa<1 ×1 010 gev , the gluino mass bounds are reduced to less th... | long-lived gluinos and stable axinos |
the first hint that we fail to understand the nature of a large fraction of the gravitating matter in the universe came from fritz zwicky's measurements of the velocity distribution of the coma cluster in 1933. using the virial theorem, zwicky found that galaxies in the cluster were orbiting far too fast to remain grav... | searching for dark matter with single phase liquid argon |
this thesis describes in detail the search for new phenomena in mono-jet final states with the atlas experiment at the lhc. the final state is considered the golden channel in the searches for large extra dimensions (led) but also allows access to a very rich susy-related phenomenology pertaining to the production of w... | search for exotic mono-jet events: in proton-proton collisions at √s=7 tev and 8 tev with the atlas detector |
there is overwhelming evidence that non-baryonic dark matter constitutes ∼ 27% of the energy density of the universe. weakly interacting massive particles (wimps) are promising dark matter candidates that may produce γ rays via annihilation or decay detectable by the fermi large area telescope (lat). a detection of wim... | indirect searches for dark matter with the fermi large area telescope1 |
this book employs computer simulations of 'artificial' universes to investigate the properties of two popular alternatives to the standard candidates for dark matter (dm) and dark energy (de). it confronts the predictions of theoretical models with observations using a sophisticated semi-analytic model of galaxy format... | beyond λcdm: exploring alternatives to the standard cosmological paradigm |
we study a real scalar septuplet model which has a neutral component regarded as a dark matter particle candidate. the calculation of its thermal relic abundance without (with) the sommerfeld effect suggests that the observed value corresponds to the mass of the dark matter particle $m_0 \gtrsim 8.8~(25)~\mathrm{tev}$.... | confronting the real scalar septuplet minimal dark matter model with vacuum stability, perturbativity, and type-i and type-iii seesaws |
introducing an additional symmetry ( δ symmetry) in the einstein-hilbert action, we obtain a gravitational field model ( δ gravity) based on two symmetric tensors, g μv and ∼g μv where an effective metric, given by g μv= g μv + ∼g μv must be defined to describe the trajectories of massless particles. in previous papers... | δ gravity, δ matter and the accelerated expansion of the universe |
the darkside-50 collaboration is an international experiment conducted at the laboratori nazionali del gran sasso in italy, where low-radioactivity liquid argon is used within a dual-phase time projection chamber to detect weakly interacting massive particles (wimps), one of the leading candidates for dark matter. the ... | a machine learning approach for dark-matter particle identification under extreme class imbalance |
we investigate multi-lepton lhc signals arising from an extension at the grand unification scale of the standard minimal supersymmetric model (mssm) involving right-handed neutrino superfields. in this framework neutrinos have dirac masses and the mixed sneutrinos are the lightest supersymmetric particles and hence the... | multi-lepton signatures at the lhc from sneutrino dark matter |
we present the results of a search for new particles in events with a high-pt photon and high missing transverse momentum with the atlas experiment at the lhc. the analysis is performed on the data collected by atlas at a centre of mass energy of 8tev and corresponding to a total integrated luminosity of 20.3 fb-1 . no... | search for dark matter in events with a hight- pt photon and high missing transverse momentum in atlas |
the large electron-positron collider (lep) established the standard model (sm) of particle physics with unprecedented precision, including all its radiative corrections. these led to predictions for the masses of the top quark and higgs boson, which were beautifully confirmed later on. after these precision measurement... | precision experiments at lep |
we fit the γ-ray excess from the galactic centre (gc) in terms of parameters of the minimal supersymmetric standard model (mssm) . consistency with other γ-ray observation, such as those from dwarf spheroidal galaxies, is also ensured, in addition to the constraints from direct dark matter search. furthermore, we expec... | dark matter, extra-terrestrial gamma-rays and the mssm: a viability study |
we examine the thermal evolution of particle number densities in the early universe when the particles have a finite diffusion length. assuming that annihilations are impossible when the mean separation of the particles is larger than their diffusion length, we derive a version of the boltzmann equation for freeze-out ... | diffusion-limited relic particle production |
axions are well motivated particles proposed in an extension of the sm as a solution to the strong cp problem. also, there is the category of axion-like particles (alps) which appear in extensions of the sm and share the same phenomenology of the axion. axions and alps are candidates to solve the dark matter problem. c... | solar axion search with micromegas detectors in the cast experiment with $^{3}$he as buffer gas |
decades of astrophysical observations suggest that 23% of the mass energy of the universe is dark. meanwhile, particle physics theories favor the existence of a stable and weakly interacting particle, which has yet to be detected. these realities combine to formulate a very well motivated particle dark matter candidate... | kinetic inductance detectors for dark matter searches |
a substantial amount of astrophysical evidence indicates that approximately a quarter of all energy in the universe is composed of a nonluminous, and nonbaryonic "dark'' matter. of the potential dark matter particle candidates, weakly interacting massive particles, or wimps, is particularly well motivated. as a means t... | supercdms prototype detector design and testing |
wimps, or weakly interacting massive particles, are the leading candidates for dark matter, the 'missing' mass in the universe. an experiment has obtained no evidence for such particles, despite an impressive increase in sensitivity. | astroparticle physics: dark matter remains elusive |
although they have not yet been detected, axions and axion-like particles (alps) continue to maintain the interest (even increasingly so) of the rare-event searches community as viable candidates for the dark matter of the universe but also as a solution for several other puzzles of astrophysics. their property of coup... | an update on the axion helioscopes front: current activities at cast and the iaxo project |
possible dark matter candidates in particle physics span a mass range extending over fifty orders of magnitude. in this review, we consider the range of masses from a few kev to a few hundred tev, which is relevant for cold particle dark matter. we will consider models where dark matter arises as weakly coupled element... | cold particle dark matter |
a new strongly coupled dark sector can produce a well-motivated and phenomenologically interesting composite dark matter candidate. i will review a model recently proposed by the lattice strong dynamics collaboration in which the composite dark matter is naturally ``stealthy'': although its constituents are charged the... | stealth dark matter: model, lattice calculations, and constraints |
the presence of dark matter provides some of the most tangible evidence for the existence of physics beyond the standard model. one compelling dark matter candidate is the axion, a light boson that was originally postulated as a solution to another outstanding issue, the strong cp problem in qcd. abracadabra-10cm is a ... | recent results from the abracadabra-10cm search for low-mass axion dark matter |
we present an analysis of fermionic dark matter (dm) in the context of 6-dimensional effective field theory (eft). we also compared the result generated via 6-dimensional eft analysis with the current experimental results for dark matter searches. these experiments are methodically categorized as direct and indirect se... | analysis of direct and indirect detection of fermionic dark matter of 6-dimensional effective field theory |
researchers found that visible matter alone is not enough to account for the world we see today. galaxy formation and gravitational models require an invisible matter called dark matter. now, the lz (lux-zeplin) team is trying to detect wimps (weakly interacting massive particles), one of the leading hypothetical candi... | direct detection of wimp dark matter with ultra-pure xenon in lux-zeplin |
the rate of dark matter annihilation should be greatest where the dark matter density is maximal. this is typically in the gravity wells of large stars where it also happens to be true that magnetic fields can be very large. in this poster we present an examination of how these intense magnetic fields can alter the cro... | magnetic enhancements to dark matter annihilation |
the rich spectra of polyatomic molecules offer the possibility of enhanced sensitivity to variations in fundamental constants such as the proton-to-electron mass ratio, μ, arising from coupling between standard model particles and theoretically well-motivated ultralight dark matter (udm) candidates. recent extension of... | enhanced sensitivity to ultralight bosonic dark matter in the spectra of sroh |
the orbital period loss of the compact binary systems is the first indirect evidence of gravitational waves which agrees well with einstein's general theory of relativity to a very good accuracy. however, there is less than one percent uncertainty in the measurement of orbital period loss from the general reltivistic p... | ultralight dark matter: constraints from gravitational waves and other astrophysical observations |
it is believed that perhaps 80% of the total mass in most galaxies is distributed in a halo that is larger than the galaxy itself, but is not associated with stars or other known physical objects. most candidates for dark matter are novel fundamental particles, rather than ordinary atoms. it is suggested here that a mo... | can frozen hydrogen snowballs account for galactic dark matter? |
axions are hypothetical elementary particles that may help provide the answer as to why qcd preserves the discrete symmetries p and cp. light axions also have properties that make them ideal dark-matter candidates. the axion dark matter experiment (admx), has been at the forefront of the search for dark-matter axions f... | design of the admx gen2 axion search |
the nature of dark matter is one of the greatest mysteries in particle physics and cosmology. the axion, a light neutral boson predicted as a solution to the strong cp problem in qcd, is also a compelling dark matter candidate. the axion dark matter experiment (admx) uses the haloscope technique to search for dark matt... | overview of the axion dark matter experiment (admx) |
axions are one of the best-motivated dark matter particle candidates and are able to solve the strong cp problem. in the presence of magnetic fields, axions can resonantly convert to observable photons, making the strong magnetic field within neutron star magnetospheres a natural channel for axion indirect detection. b... | indirect detection of axion dark matter with radio signals from neutron stars |
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