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in recent years, warm dark matter models have been studied as a viable alternative to the cold dark matter models. the warm dark matter particle properties are expected to imprint distinct signatures on the structure formation at both large and small scales and there have been many attempts to study these properties wi... | warm dark matter in simulations |
we propose a non-universal u(1)x gauge extension to the standard model (sm) and an additional peccei-quinn (pq) global symmetry to study the mass hierarchy and strong cp problem. the scheme allows us to distinguish among fermion families and to generate the fermionic mass spectrum of particles of the sm. the symmetry b... | from peccei quinn symmetry to mass hierarchy problem |
to constrain the properties of dark matter (dm) that interacts with nucleons, we have conducted an experimental search for any anomalous heating of ordinary baryonic matter at 77 k. our tabletop experiment is motivated by the possibility (discussed in a previous paper) that dm particles with masses in the ∼1-2 m p rang... | dark matter that interacts with baryons: experimental limits on the interaction cross section for 27 atomic nuclei, and resultant constraints on the particle properties |
the presence of a hidden or dark sector of phenomena that relates either weakly or in a particular way to standard model (sm) fields has theoretical as well as experimental support. many extensions of sm use hidden or dark sector states to propose a specific candidate for dark matter (dm) in the universe or to explain ... | review on higgs hidden–dark sector physics at high-energy colliders |
in any gauge extension of the standard model (sm) of quarks and leptons, there is a minimal set of fermion and scalar multiplets which encompasses all the particles and interactions of the sm. included within this set, there may be a suitable dark-matter candidate. if not, one may still exist from the judicious additio... | predestined dark matter in gauge extensions of the standard model |
we study the anapole moment of the lightest neutralino in the constrained minimal supersymmetric standard model (cmssm). the electromagnetic anapole is the only allowed electromagnetic form factor for majorana fermions, such as the neutralino. since the neutralino is the lsp in many versions of the mssm and therefore a... | anapole moment of the lightest neutralino in the cmssm |
in all scalar extensions of the standard model of particle interactions, the one higgs boson responsible for electroweak symmetry breaking always mixes with other neutral scalars at tree level unless a symmetry prevents it. an unexplored important option is that the mixing may be radiative, and thus guaranteed to be sm... | radiative mixing of the one higgs boson and emergent self-interacting dark matter |
we present a novel framework capable of addressing the dark matter problem through freeze-in and freeze-out mechanisms, separately or together, depending on the region of the parameter space considered. in the dark matter dynamics, the model features an interplay of thermal production along with sizeable contribution t... | freeze-in and freeze-out of dark matter with charged long-lived partners |
cosmological perturbation theory for the late universe dominated by dark matter is extended beyond the perfect pressureless fluid approximation by taking the dark matter velocity dispersion tensor as an additional field into account. a proper tensor decomposition of the latter leads to two additional scalar fields, as ... | evolution of dark matter velocity dispersion |
weakly interacting massive particles (wimps) are a leading candidate for dark matter and are expected to produce nuclear recoil (nr) events within liquid xenon time-projection chambers. we present a measurement of the scintillation timing characteristics of liquid xenon in the lux dark matter detector and develop a pul... | liquid xenon scintillation measurements and pulse shape discrimination in the lux dark matter detector |
the dark matter time projection chamber (dmtpc) is a direction-sensitive detector designed to measure the direction of recoiling $^{19}$f and $^{12}$c nuclei in low-pressure cf$_4$ gas using optical and charge readout systems. in this paper, we employ measurements from two dmtpc detectors, with operating pressures of 3... | measurement of the directional sensitivity of dmtpc detectors |
chiral symmetry is included into the dirac equation using the irreducible representations of the poincaré group. the symmetry introduces the chiral angle that specifies the chiral basis. it is shown that the correct identification of these basis allows explaining small masses of neutrinos and predicting a new candidate... | chiral symmetry in dirac equation and its effects on neutrino masses and dark matter |
torsion is a metric-independent component of gravitation, which may provide a more general geometry than the one taking place within general relativity. on the other hand, torsion could lead to interesting phenomenology in both particle physics and cosmology. in the present work it is shown that a torsion field interac... | torsion as a dark matter candidate from the higgs portal |
mass measurement of a particle whose decay products including invisible particles is a challenging task at colliders. for a new physics model involving a dark matter candidate n and a z2 symmetry that stabilizes it, a typical new process at e+e- colliders is the pair production e+e-→y y ¯ followed by decay processes y ... | measuring masses in semi-invisible final states at electron-positron colliders |
dark matter (dm) and neutrinos are the two most compelling pieces of evidence of new physics beyond the standard model of particle physics but these are often treated as belonging to two different sectors. yet dm-neutrino interactions are known to have cosmological consequences. here, we study the scenario of a scalar ... | phenomenology of a neutrino-dm coupling: the scalar case |
sterile neutrinos emerge in minimal extensions of the standard model which can solve a number of open questions in astroparticle physics. for example, sterile neutrinos in the kev-mass range are viable dark matter candidates. their existence would lead to a kink-like distortion in the tritium β-decay spectrum. in this ... | measurements with a tristan prototype detector system at the "troitsk nu-mass" experiment in integral and differential mode |
self-destructing dark matter (sddm) is a class of dark sector models in which the collision of a dark sector particle with the earth induces its prompt decay into standard model particles, generating unique signals at neutrino detectors. the inherent fragility of sddm makes its survival from the early universe unlikely... | self-destructing atomic dark matter |
we suggest that the major fraction of binary mergers, which might provide gravitational wave signal detectable by ligo/virgo, emerged from the hidden mirror sector. mirror particles do not interact with an ordinary observer except gravitationally, which is the reason why no electromagnetic signals accompanying gravitat... | binary neutron star mergers with missing electromagnetic counterparts as manifestations of mirror world |
dynamical chiral symmetry breaking in a qcd-like hidden sector is used to generate the planck mass and the electroweak scale including the heavy right-handed neutrino mass. a real scalar field transmits the energy scale of the hidden sector to the visible sectors, playing besides a role of inflaton in the early univers... | inflation and dark matter after spontaneous planck scale generation by hidden chiral symmetry breaking |
gravitationally bound neutrons have become an important tool in the experimental searches for new physics, such as modifications to newton's force or candidates for dark matter particles. here we include the relativistic effects of mass-energy equivalence into the model of gravitationally bound neutrons. specifically, ... | mass-energy equivalence in gravitationally bound quantum states of the neutron |
the magic tev gamma-ray telescopes have devoted several hundreds hour of observation time in about a decade, to hunt for particle dark matter indirect signatures in gamma rays, from various candidate targets of interest in the sky: the galactic center, satellite galaxies, galaxy clusters and unidentified objects in oth... | a review of the past and present magic dark matter search program and a glimpse at the future |
recent investigations have suggested that the six-quark combination uuddss could be a deeply bound state (s) that has eluded detection so far, and a potential dark matter candidate. we report the first search for a stable, doubly strange six-quark state in upsilon -> s anti-lambda anti-lambda decays based on a sampl... | search for a stable six-quark state at babar |
the first dama/libra-phase2 model-independent results (exposure: 1.13ton ×yr, and software energy threshold at 1 kev). they further confirm — with high confidence level — the evidence already observed by dama/nai and dama/libra-phase1 on the basis of the exploited model-independent dark matter (dm) annual modulation si... | dama/libra-phase2 results and implications on several dark matter scenarios |
axion as dark matter is an increasingly important subject in astrophysics and cosmology. experimental and observational searches are mounting across the mass spectrum of axion-like particles, many of which require detailed knowledge of axion structure over a wide range of scales. current understanding of axion structur... | axion structure formation - i: the co-motion picture |
at present, a variety of dark matter (dm) density profiles are available in the literature, able to fit the observed rotation velocity curves in galaxies. these distributions may be classified according to nature and mass of the dm candidate, and their estimation of the concentration of dm on halo scales, as well as th... | testing dark matter distributions by neutrino-dark matter interactions |
the axino, the supersymmetric partner of axion, is a well-motivated warm/hot dark matter candidate, and provides a natural solution to the relic density problem for the bino-like neutralino if it is the lightest supersymmetric particle (lsp). with the generalized minimal supergravity, we study such kind of the viable p... | investigating the gmsugra in the mssm through the long-lived bino nlsp at the hl-lhc |
the existence of dark matter is undisputed, while the nature of it is still unknown. explaining dark matter with the existence of a new unobserved particle is among the most promising possible solutions. recently dark matter candidates in the mev mass region received more and more interest. in comparison to the mass re... | depfet detectors for direct detection of mev dark matter particles |
we calculate the most stringent constraints up to date on the parameter space for sterile neutrino warm dark matter models possessing a radiative decay channel into x-rays. these constraints arise from the x-ray flux observations from the galactic center (central parsec), taken by the xmm and nustar missions. we compar... | new constraints on sterile neutrino dark matter from the galactic center |
we investigate the detectability of axino-like particle, which is defined as a supersymmetric partner of axion-like particle and can be a good candidate for dark matter in our universe. especially, we consider the fixed target experiments to search for the light axino-like particle with a neutralino as the next-to-ligh... | searching for axino-like particle at fixed target experiments |
the pico experiment uses bubble chambers filled with superheated c3 f8 for spin-dependent weakly interacting massive particle (wimp) dark matter searches. one of the main sources of background in these detectors is alpha particles from decays of environmental 222rn, which nucleate bubbles that are visually indistinguis... | modeling emission of acoustic energy during bubble expansion in pico bubble chambers |
we consider a five-dimensional model with geometry m = m_4 × s_1, with compactification radius r. the standard model particles are localized on a brane located at y=0, with identical branes localized at different points in the extra dimension. objects located on our brane can orbit around objects located on a brane at ... | micro-orbits in a many-brane model and deviations from newton's 1/r^2 law |
we develop the model proposed by cortês, gomes and smolin [1] to predict cosmological signatures of time-asymmetric extensions of general relativity. within this class of models the equation of motion of chiral fermions is modified by a torsion term. this term leads to a dispersion law for neutrinos that associates a n... | cosmological signatures of time-asymmetric gravity |
scalar particles coupled to the standard model fields through a disformal coupling arise in different theories, such as massive gravity or braneworld models. we will review the main phenomenology associated with such particles. distinctive disformal signatures could be measured at colliders and with astrophysical obser... | disformal scalars as dark matter candidates — branon phenomenology |
macroscopic dark matter (macros) refers to a broad class of alternative candidates to particle dark matter with still unprobed regions of parameter space. prior work on macros has considered elastic scattering to be the dominant energy transfer mechanism in deriving constraints on the abundance of macros for some range... | charge constraints of macroscopic dark matter |
we explore the connection between dark matter and neutrinos in a model inspired by radiative type-ii seessaw and scotogenic scenarios. in our model, we introduce new electroweakly charged states (scalars and a vector-like fermion) and impose a discrete &z;2 symmetry. neutrino masses are generated at the loop level and ... | dark matter candidates in a type-ii radiative neutrino mass model |
the invisible axion is a well-motivated hypothetical particle which could address two fundamental questions in modern physics - the cp symmetry problem in the strong interactions and the dark matter mystery of our universe. the plausible mass (frequency) range of the qcd axion as a dark matter candidate spans from uev ... | multiple-cell cavity design for high mass axion searches: an in-depth study |
in this article, we examine the standard model extended with a y =0 higgs triplet and a real singlet. we consider the higgs triplet to be odd under the z2 symmetry, and hence the lightest stable particle from the inert triplet becomes the dark matter candidate, whereas the real singlet is considered to be even under th... | exploring c p -violation in y =0 inert triplet with real singlet |
we investigate the dark matter (dm) phenomenology of axion-like particles (alp) along with the alp interpretation of muon $(g-2)$ in a minimal extension of the standard model (sm). here we have considered flavor dependent alp couplings with sm leptons to study the allowed region of parameter space from the muon $(g-2)$... | axion-like particle interpretation of dark matter and muon $(g-2)$ |
the current standard model of cosmology, λ cdm , requires dark matter to make up around 25% of the total energy budget of the universe. yet, quite puzzlingly, there appears to be no candidate particle in the current standard model of particle physics. assuming the validity of the cold dark matter (cdm) paradigm, dark m... | resonant bar detector constraints on macro dark matter |
we consider an extension of the standard model involving two new scalar particles around the tev scale: a singlet neutral scalar ϕ, to be eventually identified as the dark matter candidate, plus a doubly charged su(2)l singlet scalar, s++, that can be the source for the non-vanishing neutrino masses and mixings. assumi... | higgs portal dark matter and neutrino mass and mixing with a doubly charged scalar |
weakly coupled models for the 750 gev diphoton resonance often invoke new particles carrying both color and/or electric charges to mediate loop-induced couplings of the resonance to two gluons and two photons. the new colored particles may not be stable and could decay into final states containing standard model partic... | from the 750 gev diphoton resonance to multilepton excesses |
the paper formulates a principal positions of non-hermitian models with $\gamma_5$-mass extensions, which often be ignored in some investigations for this subject. in fact in this case hamiltonians contain not only hermitian masses $m_1$, but also contribution from anti-hermitian components of fermion masses $m_2$. mai... | an upper limit on fermion mass spectrum in non-hermitian models and its implications for studying of dark matter |
in models with colored particle q that can decay into a dark matter candidate x, the relevant collider process pp→ q\bar{q}→ x\bar{x} + jets gives rise to events with significant transverse momentum imbalance. when the masses of q and x are very close, the relevant signature becomes monojet-like, and large hadron colli... | monojet signatures from heavy colored particles: future collider sensitivities and theoretical uncertainties |
the znwo4 is an anisotropic crystal scintillator; for its peculiar characteristics, it is a very promising detector to exploit the so-called directionality approach in the investigation of those dark matter (dm) candidates inducing nuclear recoils. recently, in the framework of the adamo project, an r&d to develop ... | developments and improvements of radiopure znwo4 anisotropic scintillators |
additional scalar fields from scalar-tensor, modified gravity or higher dimensional theories beyond general relativity may account for dark energy and the accelerating expansion of the universe. these theories have led to proposed models of screening mechanisms, such as chameleon and symmetron fields, to account for th... | quantum simulation of dark energy candidates |
direct detection (dd) of dark matter (dm) candidates in the ≲10 gev mass range is very sensitive to the tail of their velocity distribution. the important quantity is the maximum weakly interacting massive particle speed in the observer's rest frame, i.e. in average the sum of the local galactic escape speed vesc and o... | making sense of the local galactic escape speed estimates in direct dark matter searches |
the existence of dark sectors, consisting of weakly-coupled particles that do not interact with the known standard model forces, is theoretically and phenomenologically motivated. the hidden particles are candidates for dark matter and can interact with photon through electric dipole moment (edm) and magnetic dipole mo... | bounds on dipole moments of hidden dark matter through kinetic mixing |
the formation history of globular clusters (gcs) at redshift z > 4 remains an unsolved problem. in this work, we use the cosmological, n-body hydrodynamical 'zoom-in' simulation gigaeris to study the properties and formation environment of proto-gc candidates in the region surrounding the progenitor of a milky way-s... | stellar cluster formation in a milky way-sized galaxy at z > 4 - i. the proto-globular cluster population and the imposter amongst us |
anisotropic scintillators can offer a unique possibility to exploit the so-called directionality approach to investigate the presence of those dark matter (dm) candidates inducing nuclear recoils. their use can overcome the difficulty of detecting extremely short nuclear recoil tracks. in this paper, we present recent ... | the adamo project for the dark matter directionality approach |
the 331 model with right-handed neutrinos is reassessed to investigate the cp violation in the quark sector. after the spontaneous symmetry breaking, the masses and physical fields of the particle content are obtained. the fermions content of the 331 model is enlarged to include exotic quarks with known electric charge... | the cp violation and scalar dark matter in a 331 model |
in this study, we investigate the impact of weakly interacting massive particles (wimps) dark matter (dm) on c-λ universal relations, gw170817 posterior, and radial oscillations of neutron stars (nss) by considering the interactions of uniformly trapped neutralinos as a dm candidate with the hadronic matter through the... | probing the impact of wimp dark matter on universal relations, gw170817 posterior, and radial oscillations |
isolated h i clouds with no optical counterparts are often taken as evidence for galaxy-galaxy interactions, though an alternative hypothesis is that these are primordial 'dark galaxies' that have not formed stars. similarly, certain kinematic features in h i streams are also controversial, sometimes taken as evidence ... | kinematic clues to the origins of starless h i clouds: dark galaxies or tidal debris? |
despite the great success of the standard model of particle physics, a preponderance of astrophysical evidence suggests that it cannot explain most of the matter in the universe. this so-called dark matter has eluded direct detection, though many theoretical extensions to the standard model predict the existence of par... | a study of nuclear recoil backgrounds in dark matter detectors |
optical searches assisted by the field of a laser pulse might allow for exploring a variety of not yet detected dark matter candidates such as hidden-photons and scalar minicharged particles. these hypothetical degrees of freedom may be understood as a natural consequence of extensions of the standard model incorporati... | light dark matter candidates in intense laser pulses ii: the relevance of the spin degrees of freedom |
we study a scalar dark matter (dm) model with two dm species coupled to the standard model (sm) particles via a sub-gev dark photon. in this model, we find that dm conversion occurs through the dark photon and it plays a fundamental role in setting the observed relic abundance. furthermore, the two dm candidates can be... | multicomponent scalar dark matter at high-intensity proton beam experiments |
we explore the implications of the t -b -τ (and b -τ ) yukawa coupling unification condition on the fundamental parameter space and sparticle spectroscopy in the minimal gauge mediated supersymmetry breaking model. we find that this scenario prefers values of the c p -odd higgs mass ma≳1 tev , with all colored sparticl... | yukawa unification and sparticle spectroscopy in gauge mediation models |
in twin higgs models, a discrete z2 symmetry between the standard model higgs and the twin higgs is introduced to address the hierarchy problem. in this work, we propose another discrete symmetry in twin higgs: the t parity, which maps the twin higgs quadruplet into its mirror copy. the t parity brings us a whole group... | twin higgs model with t parity |
dark matter (dm) is one of the most critical questions to be understood and answered in fundamental physics today. plenty of astronomical and cosmological observations have already pinned down that dm exists in the universe, the milky way, and the solar system. however, understanding dm with the language of elementary ... | introduction to a low-mass dark matter project, aletheia: a liquid helium time projection chamber in dark matter |
we introduce four supersymmetric (susy) axion models in which the strong cp problem and the $\mu$ problem are solved with the help of the peccei-quinn mechanism and the kim-nilles mechanism, respectively. the axion physics enriches the susy model by introducing axion as a dark matter candidate and, therefore, the light... | on the possibility of mixed axion/neutralino dark matter in specific susy dfsz axion models |
the standard model may be included within a supersymmetric theory, postulating new sparticles that differ by half-a-unit of spin from their standard model partners, and by a new quantum number called r-parity. the lightest one, usually a neutralino, is expected to be stable and a possible candidate for dark matter. the... | the supersymmetric standard model |
recent reports of a weak unidentified emission line at ~3.5 kev found in spectra of several matter-dominated objects may give a clue to resolve the long-standing problem of dark matter. one of the best physically motivated particle candidate able to produce such an extra line is sterile neutrino with the mass of ~7 kev... | influence of ~7 kev sterile neutrino dark matter on the process of reionization |
we study a scenario in which the only light new particles are a majorana fermion dark matter candidate and one or more qcd-charged scalars, which couple to light quarks. this scenario has several interesting phenomenological features if the new particles are nearly degenerate in mass. in particular, lhc searches for th... | study of dark matter and qcd-charged mediators in the quasidegenerate regime |
we analyse the trapping of eigenspinors of the charge conjugation operator with dual helicity (elko), in thin and thick string-like models with codimension-2. elko spinor fields describe mass dimension one fermions in four dimensions (and, correspondingly, mass dimension two fermions in six dimensions), that represent ... | exotic elko on string-like defects in six dimensions |
we construct a 5d {{z}}_2 -symmetric model with three d3-branes: two ir ones with negative tension located at the ends of an extra-dimensional interval and a uv-brane with positive tension placed in the middle of the interval — ir-uv-ir model. the background solutions for this geometric setup are found without and with... | higgs dark matter from a warped extra dimension — the truncated-inert-doublet model |
darkside-50 is a detector for dark matter candidates in the form of weakly interacting massive particles. it utilizes a liquid argon time projection chamber for the inner main detector, surrounded by a liquid scintillator veto (lsv) and a water cherenkov veto detector (wcv). the lsv and wcv act as the neutron and cosmo... | the electronics and data acquisition system for the darkside-50 veto detectors |
we propose a framework where a phase transition associated with a gauge symmetry breaking that occurs (not far) above the electroweak scale sets a stage for baryogenesis similar to the electroweak baryogenesis in the standard model. a concrete realization utilizes the breaking of su(2)r× u(1)x→ u(1)y. new chiral fermio... | electroweak-like baryogenesis with new chiral matter |
we propose a model where the masses of the active neutrinos and a dark matter candidate are generated radiatively through the (1)b-l gauge symmetry breaking. it is realized by a non-universal (1)b-l charge assignment on the right handed neutrinos and one of them becomes dm. the dark matter mass becomes generally small ... | radiative dark matter and neutrino masses from an alternative u(1)b-l gauge symmetry |
in a simple hydrodynamic model, the transverse momentum distributions are found for a hyperons formed in pp collisions at ultrarelativistic energies. the calculated spectra are compared with the experimental data obtained for various colliders in a wide range of proton collision energies, including the data from experi... | detection of particles of dark matter from the spectrum of secondary particles in high-energy proton-proton collisions in a thermodynamic model |
we discuss the possible connection between the scale for baryon number violation and the cosmological bound on the dark matter relic density. a simple gauge theory for baryon number which predicts the existence of a leptophobic cold dark matter particle candidate is investigated. in this context, the dark matter candid... | leptophobic dark matter and the baryon number violation scale |
in a simple thermodynamic model, transverse momentum distributions are found for $λ $-hyperons produced in pp collisions at ultrarelativistic energies. studying the behavior of the average transverse momentum depending on the mass of the emitted particle shows that it is possible to search for large mass quark nuggets ... | spectra of secondary particles in high-energy proton-proton collisions in the thermodynamic model and the possibility of detection of particles of dark matter |
supersymmetry (susy) is a complete and renormalisable candidate for an extension of the standard model. at an energy scale not too far above the electroweak scale it would solve the hierarchy problem of the sm higgs boson, dynamically explain electroweak symmetry breaking, and provide a dark-matter candidate. since it ... | the status of supersymmetry after the lhc run 1 |
an unusual regime for liquid-state nuclear magnetic resonance (nmr) where the magnetic field strength is so low that the j-coupling (intramolecular spin-spin) interactions dominate the spin hamiltonian opens a new paradigm with applications in spectroscopy, quantum control, and in fundamental-physics experiments, inclu... | extreme nuclear magnetic resonance: zero field, single spins, dark matter… |
opening up the weinberg operator at 1-loop level using a scalar triplet, two scalar doublets and one fermion give rise to t4-2-i one-loop topology. neutrino masses generated from this topology are always accompanied by the tree level type ii seesaw contribution. in this work, we propose a radiative majorana neutrino ma... | one-loop type ii seesaw neutrino model with stable dark matter candidates |
axion-like particles (alps) are undiscovered pseudo-scalar particles that are candidates for ultralight dark matter. alps interact with photons slightly and cause the rotational oscillation of linearly polarized light. dark matter axion search with ring cavity experiment (dance) searches for alp dark matter by amplifyi... | dark matter axion search with ring cavity experiment dance: design and development of auxiliary cavity for simultaneous resonance of linear polarizations |
in this work, we present a scotogenic model, where the neutrino mass is generated at one-loop diagrams. the standard model (sm) is extended by three singlet majorana fermions and two inert scalar doublets instead of one doublet as in the minimal scotogenic model. the model scalar sector includes two cp-even, two cp-odd... | a scotogenic model with two inert doublets |
dark matter searches have been ongoing for three decades; the lack of a positive discovery of the main candidate, the wimp, after dedicated efforts, has put axions and axion-like particles in the spotlight. the three main techniques employed to search for them complement each other well in covering a wide range in the ... | digging into axion physics with (baby)iaxo |
axions and axion-like particles (alps) are among of the most popular candidates for dark matter. axions are also considered as new physics contributions to the muon g-2. following the existed interest to alps we consider interaction between neutrinos and hypothetical axion-like particles and derive for the first time t... | neutrino mixing angle and neutrino oscillation in alps matter |
the axionlike particles with ultralight mass (∼10-22 ev ) can be a possible candidate of dark matter, known as the fuzzy dark matter (fdm). these particles form a bose-einstein condensate in the early universe which can explain the dark matter density distribution in galaxies at the present time. we study the time evol... | field excitation in fuzzy dark matter near a strong gravitational wave source |
the neutrino minimal standard model (νmsm) has been tightly constrained in the recent years, either from dark matter (dm) production or from x-ray and small-scale observations. however, current bounds on sterile neutrino dm can be significantly modified when considering a νmsm extension, in which the dm candidates inte... | galactic center constraints on self-interacting sterile neutrinos from fermionic dark matter ("ino") models |
we investigate the prospects for direct detection of dark matter (dm) particles, such as dark photons, incident on the upper atmosphere. a recent work relates the burst-like temperature excursions in the stratosphere at heights of ~38-47 km with incident invisible streaming matter. surprisingly, dark photons match the ... | on the direct detection of dark matter in the stratosphere |
we consider a simple extension of the standard model that can account for the dark matter and explain the existence of neutrino masses. the model includes a vector-like doublet of su(2), a singlet fermion, and two scalar singlets, all of them odd under a new z$_2$ symmetry. neutrino masses are generated radiatively by ... | lepton flavor violation and scalar dark matter in a radiative model of neutrino masses |
optically levitated oscillators in high vacuum have excellent environmental isolation and low mass compared with conventional solid-state sensors, which makes them suitable for ultrasensitive force detection. the force resolution usually scales with the measurement bandwidth, which represents the ultimate detection cap... | yoctonewton force detection based on optically levitated oscillator |
weakly interacting massive particles (wimps, $\chi$) are candidates for dark matter. wimp searches at lepton colliders are complementary to searches at hadron colliders and direct and indirect detection, since they directly probe the coupling to electrons which a priori is independent of the coupling to hadrons. like a... | wimp searches at the international linear collider |
the simple 3-3-1 model that contains the minimal lepton and minimal scalar contents is studied in detail. the impact of the inert scalars (i.e., the extra fundamental fields that provide realistic dark matter candidates) on the model is discussed. all the interactions of the model are derived, in which the standard mod... | phenomenology of the simple 3-3-1 model with inert scalars |
the axion is a hypothetical particle, a promising candidate for dark matter, and a solution to the strong cp problem. axion haloscope search experiments deal with a signal power comparable to noise uncertainty at millikelvin temperature. we use a flux-driven josephson parametric amplifier (jpa) with the aim of approach... | josephson parametric amplifier in axion experiments |
astronomical and cosmological observations support the existence of invisible matter that can only be detected through its gravitational effects, thus making it very difficult to study. dark matter makes up about 27% of the known universe. as a matter of fact, one of the main goals of the physics programme of the exper... | wimp dark matter searches with the atlas detector at the lhc |
this editorial presents the quantum field theoretic ambiance in which elko and mass dimension one fermions come to exist. this may serve not only to introduce elko, and the associated quantum field, but it may also open a door to a new class of spin one half fermions and bosons. these new particles, as it will be argue... | elko and mass dimension one fermions |
we consider the extension of the standard model (sm) with a strongly interacting qcd-like hidden sector, at least two generations of right-handed neutrinos, and one scalar singlet. once the scalar singlet obtains a nonzero vacuum expectation value, active neutrino masses are generated through a type-i seesaw mechanism.... | heavy dark matter, neutrino masses, and higgs naturalness from a strongly interacting hidden sector |
we consider the cosmology and phenomenology of a dark photon portal to a simple dark sector consisting of a single, light, fermionic dark matter particle species with mass in the mev range. we entertain three possible kinetic mixing structures of a new abelian gauge group u(1)dark with the visible sector through u(1)e.... | mev dark matter with mev dark photons in abelian kinetic mixing theories |
we discuss the production of dark matter with mass of order 10-100 tev and o (1 ) couplings to the standard model, a scenario we refer to as the "mesotuned wimp." given the lack of new physics observed at the lhc, indicating we live in a world with some degree of fine-tuning, this scale is a natural scale to expect new... | mesotuned wimps and avoided deconfinement |
models with an extended scalar electroweak sector are well motivated. such models could accommodate a dark matter candidate if there is an additional scalar representation with a vanishing vacuum expectation value and, in addition, there are no couplings between fermions and the dark matter candidate. the most natural ... | revisiting two dark matter candidates in $s_3$-symmetric three-higgs-doublet models |
in recent years, theoretical and experimental interest in dark matter (dm) candidates have shifted focus from primarily weakly-interacting massive particles (wimps) to an entire suite of candidates with masses from the zev-scale to the pev-scale to 30 solar masses. one particular recent development has been searches fo... | athermal phonon sensors in searches for light dark matter |
we calculate the mean free path in a hot and dense nuclear environment for a fermionic dark matter particle candidate in the ∼gev mass range interacting with nucleons via scalar and vector effective couplings. we focus on the effects of density and temperature in the nuclear medium in order to evaluate the importance o... | diffusion of dark matter in a hot and dense nuclear environment |
the any light particle search ii (alps ii) experiment is a light-shining-through-a-wall experiment under construction at desy, hamburg. its goal is to probe the existence of axion like particles (alps), a possible candidate for dark matter. the expected small rate of reconverted photons requires a sensor capable of mea... | the tes detector of the alps ii experiment |
the freeze-in production of feebly interacting massive particle (fimp) dark matter in the early universe is an appealing alternative to the well-known — and constrained — weakly interacting massive particle (wimp) paradigm. although challenging, the phenomenology of fimp dark matter has been receiving growing attention... | testing freeze-in with axial and vector z' bosons |
this book is a new look at one of the hottest topics in contemporary science, dark matter. it is the pioneering text dedicated to sterile neutrinos as candidate particles for dark matter, challenging some of the standard assumptions which may be true for some dark matter candidates but not for all. so, this can be seen... | sterile neutrino dark matter |
within a thermodynamic model, an interpretation of transverse momentum spectra of soft photons in proton-proton collisions is proposed via taking into account the $x$17 boson of mass 17 mev—a new particle, which is a possible candidate for the role of a dark matter particle. the masses of dark matter particles are dete... | detection of new particles—possible candidates for the role of dark matter particles in collisions of protons and nuclei from spectra of soft photons |
a quark nugget is a hypothetical dark-matter candidate composed of approximately equal numbers of up, down, and strange quarks. most models of quark nuggets do not include effects of their intrinsic magnetic field. however, tatsumi used a mathematically tractable approximation of the standard model of particle physics ... | limits on magnetized quark-nugget dark matter from episodic natural events |
many extensions of the standard model of particle physics predict a parallel sector of a new u(1) symmetry, giving rise to hidden photons. these hidden photons are candidate particles for cold dark matter. they are expected to kinetically mix with regular photons, which leads to a tiny oscillating electric-field compon... | search for hidden-photon dark matter with the funk experiment |
we have studied channeling effects in a cesium iodide (csi) crystal that is similar in composition to the ones being used in a search for weakly interacting massive particles (wimps) dark matter candidates, and measured its energy-dependent quenching factor, the relative scintillation yield for electron and nuclear rec... | measurement of the quenching and channeling effects in a csi crystal used for a wimp search |
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