abstract stringlengths 3 192k | title stringlengths 4 857 |
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this text contains the main message of my previous review \cite{bednyakov:2015uoa} on the dark matter problem and supports resent paper \cite{froborg:2020tdh}. true dark matter particles possess an exclusive galactic signature --- the annual modulation, which is accessible today via direct dark matter detection only. o... | a direct dark matter detection experiment is inevitable |
we explore a common symmetrical origin for two long standing problems in particle physics: the strong cp and the fermion mass hierarchy problems. the peccei--quinn mechanism solves the former one with an anomalous global $u(1)_{\rm pq}$ symmetry. here we investigate how this $u(1)_{\rm pq}$ could at the same time expla... | natural axion model from flavour |
with the lhc about to start its last data-taking period before being upgraded to the high-luminosity lhc, it is time for the international high energy physics community to define the future of collider particle physics. the european strategy for particle physics highlights an electron-positron higgs boson factory as th... | the future circular collider (fcc) at cern |
direct detection experiments are the only way to obtain indisputable evidence of the existence of dark matter (dm) in the form of a particle. these experiments have been used to probe many extensions of the standard model (sm) that provide dm candidates. experimental results like the latest ones from xenon1t lead to se... | electroweak corrections to dark matter direct detection in the dark singlet phase of the n2hdm |
in the simplest left-right extension of the standard model of particle interactions with one scalar bidoublet and one su(2)r triplet for seesaw majorana neutrino masses, the addition of a variety of fermion and scalar multiplets automatically makes them stable (predestined) dark matter candidates. we discuss the interp... | predestined dark matter varieties in the simplest left-right model |
in this work we propose a simple extension of the standard model (sm) by adding to it eleven new particles. three heavy lepton (fe , fμ , fτ ), singlets under {su}{(3)}c× {su}{(2)}l carrying respective lepton numbers, charged under u{(1)}y with y = -2 and transforming under a discrete symmetry as {f}i\to -{f}i. one sca... | a simple extension of the sm that can explain the ( g-2 ) μanomaly, small neutrino mass and a dark matter |
the nature of dark matter is still an open problem. the simplest assumption is that gravity is the only force certainly coupled to dark matter and thus the micro black holes could be a viable candidate. we investigated the possibility of direct detection of charged micro black holes with masses around and upward the pl... | about detecting very low mass black holes in lar detectors |
researchers have spent decades searching for the elusive particles — a final generation of detectors should leave them no place to hide. | last chance for wimps: physicists launch all-out hunt for dark-matter candidate |
we consider the condensate of q-deformed bosons as a model of dark matter. our observations demonstrate that for all q values, the system condenses below a q-dependent critical temperature ${t}_{\mathrm{c}}^{q}$ . the critical temperature interestingly tends to infinity when q → 0, so that the q-deformed boson gas is a... | description of the properties of dark matter by deformed statistics |
we here propose a mechanism that predicts, at early times, both baryon asymmetry and dark matter origin and that recovers the spontaneous baryogenesis during the reheating. working with u(1)-invariant quark q and lepton l effective fields, with an interacting term that couples the evolution of universe's environment fi... | unifying baryogenesis with dark matter production |
the b -l supersymmetric standard model (blssm) is an ideal testing ground of the spin nature of dark matter (dm) as it offers amongst its candidates both a spin-1 /2 (the lightest neutralino) and spin-0 (the lightest right-handed sneutrino) state. we show that the mono-z channel can be used at the large hadron collider... | dark matter spin characterization in mono-z channels |
in this paper we examine gauge coupling unification of the the non-susy so(10) grand unified theory proposed by babu and mohapatra at the two loop level. this theory breaks down to the standard model in a single step and has the distinguishing feature of tev non-standard model scalars. this leads to a plethora of inter... | two loop unification of non-susy so(10) gut with tev scalars |
the korea institute of science and technology information (kisti) has been studying the e-science paradigm. with its successful application to particle physics, we consider the application of the paradigm to astroparticle physics. the standard model of particle physics is still not considered perfect even though the hi... | e-science paradigm for astroparticle physics at kisti |
scotogenic models are among the most elegant and economic solutions that provide an explanation for two of the main open questions in particle physics: neutrino masses and dark matter (dm). in this work, after a brief discussion of the model, we present a phenomenological study of the dm candidate in a variant of the s... | dark matter in a charged variant of the scotogenic model |
one of the key questions in particle physics and astrophysics is the nature of dark matter, the existence of which has been confirmed in many astrophysical and cosmological observations. besides direct and indirect detection experiments, collider searches for dark matter offer the unique possibility to not only detect ... | supersymmetry and the collider dark matter picture |
we propose a model to explain tiny masses of neutrinos with the lepton number conservation, where neither too heavy particles beyond the tev-scale nor tiny coupling constants are required. assignments of conserving lepton numbers to new fields result in an unbroken $z_2$ symmetry that stabilizes the dark matter candida... | neutrino mass, dark matter and baryon asymmetry without lepton number violation |
the axion is a hypothetical particle proposed to solve the strong $cp$ problem, and also a candidate for dark matter. this non-relativistic particle in the galactic halo can be converted into a photon under a strong magnetic field and detected with a microwave resonant cavity. relying on this detection method, many exp... | capp-8tb: search for axion dark matter in a mass range of 6.62 to 7.04 μev |
we study the vacuum stability of a minimal higgs portal model in which the standard model (sm) particle spectrum is extended to include one complex scalar field and one dirac fermion. these new fields are singlets under the sm gauge group and are charged under a global u (1 ) symmetry. breaking of this u (1 ) symmetry ... | majorana dark matter through the higgs portal under the vacuum stability lamppost |
we present a minimal extension of the standard model that includes a long-lived fermion with weak-scale mass and an o (gev ) fermionic dark matter candidate both of which are coupled to quarks. decays of a tev-scale colored scalar in a radiation-dominated phase bring the former to a thermal abundance while also produci... | dark matter and baryogenesis from visible-sector long-lived particles |
scalar fields like dilaton appear in quantum field theory (qft) due to scale symmetry breaking. their appeal also extends to modified theories of gravity, like f (r ) gravity, horva lifshitz gravity etc. in unified theories they make their appearance through compactification of the extra dimension. apart from resolving... | exploring scalar-photon interactions in energetic astrophysical events |
we perform an exclusive study on the feebly interacting massive particle dark matter candidate in an extended hyperchargeless (y =0 ) higgs triplet model. the additional z2 odd neutral fermion singlet plays the role of dark matter with support from two other vectorlike fermion doublets. the mixing between the neutral c... | fimp dm in the extended hyperchargeless higgs triplet model |
the evidence of gravitational wave was first indirectly confirmed by the orbital period loss of hulse-taylor binary system which agrees well with the einstein's general relativistic prediction. the perihelion precession of planets, gravitational light bending and shapiro time delay are other tests of einstein's general... | probing light dark matter particles with astrophysical experiments |
one of the most compelling candidates for dark matter (dm) are light pseudo-scalar particles (axions), motivated by the strong cp problem and axiverse scenario in string theory. depending on their mass and type of self-interaction, these particles can build self-gravitating configurations such as compact objects, dm cl... | parametric-resonance based phenomenology of gravitating axion configurations |
small interfering rna (sirna)-based gene therapy has provided an alternative strategy for cancer therapy. one of the key components within gene therapy process is the delivery system. as a novel non-viral gene vector, dmp, prepared by modifying mpeg-pcl micelle with cationic dotap lipid, has been prepared and successfu... | cationic micelle-based sirna delivery for efficient colon cancer gene therapy |
since lhc has still given no signal of supersymmetry, though the energy at which the signal was expected has been passed, one is left short of any good candidate for dark matter. we had proposed [a. qadir, h. w. lee and k. y. kim, int. j. mod. phys. d 26 (2017) 1741001, 10 pp.] a modification of the einstein-hilbert ac... | motion of test particles for weyl-interaction modified gravity |
after reviewing several aspects about the thermodynamics of self-gravitating systems that undergo the evaporation (escape) of their constituents, some recent results obtained in the framework of fermionic king model are applied here to the analysis of galactic halos considering warm dark matter (wdm) particles. accordi... | new bounds for the mass of warm dark matter particles using results from fermionic king model |
several extensions to the standard model of particle physics, including light dark matter candidates and unification theories, predict deviations from newton's law of gravitation. for macroscopic distances, the inverse-square law of gravitation is well confirmed by astrophysical observations and laboratory experiments.... | weakly bound molecules as sensors of new gravitylike forces |
we consider a class of models with extra complex scalars that are charged under both the standard model and a hidden strongly coupled $su(n)_h$ gauge sector, and discuss the scenarios where the new scalars are identified as the messenger fields that mediate the spontaneously broken supersymmetries from the hidden secto... | towards gauge unified, supersymmetric hidden strong dynamics |
in this work we explore some cosmological properties coming from the particle and future horizons when are considered as candidates to model the dark energy sector within a holographic context in a flat friedmann-lemaitre-robertson-walker universe; we focus on some thermodynamics characteristics of the resulting dark e... | modeling holographic dark energy with particle and future horizons |
we formulate principal positions of a non-hermitian model with a γ5-extension of the fermion mass, which are often neglected in investigating this subject. a consistent approach to this problem requires the constraint m ≤ m, where m bounds the entire fermion mass spectrum. an analogous approach was proposed in the geom... | restriction of the fermion mass spectrum in pt-symmetric systems and its implications for studying dark matter |
the inert doublet model (idm) is one of the simplest extensions beyond the standard model (sm) with an extended scalar sector, which provides a scalar dark matter particle candidate. in this study, we investigated the double charged higgs production at a $\gamma\gamma$ collider. by scanning the whole parameter space, w... | searches for dark matter via charged higgs pair production in the inert doublet model at a γγ collider |
with the motivation of simultaneously explaining dark matter and neutrino masses, mixing angles, we have invoked the type-ii seesaw model extended by an extra su(2) doublet φ. moreover, we have imposed a z2 parity on φ which remains unbroken as the vacuum expectation value of φ is zero. consequently, the lightest neutr... | explaining dark matter and neutrino mass in the light of type-ii seesaw model |
two exotic elements have been introduced into the standard cosmological model: non-baryonic dark matter and dark energy. the success in converting a hypothesis into a solid theory depends strongly on whether we are able to solve the problems in explaining observations with these dark elements and whether the solutions ... | problems with the dark matter and dark energy hypotheses, and alternative ideas |
we consider a two-higgs doublet model extended with a broken abelian gauge symmetry under which all standard model (sm) quarks, fourth generation fermions and a new sm-singlet scalar boson are charged. such a setup is shown to be able to accommodate the muon anomalous magnetic dipole moment while being consistent with ... | a variant two-higgs doublet model with a new abelian gauge symmetry |
particles weakly interacting with ordinary matter, with an associated mass of the order of an atomic nucleus (wimps), are plausible candidates for dark matter. the direct detection of an elastic collision of a target nuclei induced by one of these wimps has to be discriminated from the signal produced by the neutrons, ... | directional detection of dark matter with the micro-tpc matrix of chambers |
multi-higgs models equipped with global symmetries produce scalar dark matter (dm) candidates stabilized by the unbroken symmetry. it is remarkable that a conserved cp symmetry can also stabilize dm candidates, provided it is a cp symmetry of order higher than two. cp4 3hdm, the three-higgs-doublet model with cp symmet... | dark matter from cp symmetry of order 4: evolution in the asymmetric regime |
we investigate the co-evolution of dark matter (dm) density perturbation and metric perturbation in the wimp paradigm. instead of adopting the conventional assumption that dm starts out in thermal equilibrium, we propose a simple phase of dm production for the wimp paradigm and extend our analysis to this phase. being ... | perturbative resonance in wimp paradigm and its cosmological implications on cosmic reheating and primordial gravitational wave detection |
the ew-$\nu_r$ model was constructed in order to provide a seesaw scenario operating at the electroweak scale $\lambda_{ew} \sim 246$ gev, keeping the same sm gauge structure. in this model, right-handed neutrinos are non-sterile and have masses of the order of $\lambda_{ew}$. they can be searched for at the lhc along ... | a model of light pseudoscalar dark matter |
the axion arises in well-motivated extensions of the standard model of particle physics and is regarded as an alternative to the weakly interacting massive particle paradigm to explain the nature of dark matter. in this contribution, we review theoretical aspects of dark matter axions, particularly focusing on recent d... | axion as a non-wimp dark matter candidate |
we present the cp-violating next-to-2-higgs-doublet model (cn2hdm) which is based on the extension of the cp-violating 2-higgs-doublet-model (c2hdm) by a complex singlet field that obeys a discrete $\mathbb{z}_2$ symmetry. the model thus features not only cp violation required for successful electroweak baryogenesis bu... | the cn2hdm |
the inert doublet model is an extension of the standard model by one extra scalar, with identical gauge quantum numbers as the standard model higgs doublet but charged under an unbroken discrete symmetry. the model offers a very rich phenomenology and could lead to signatures in electroweak precision observables or col... | signatures of the inert doublet dark matter model |
we consider a simple addition to the minimal supersymmetric standard model (mssm) of a "sister higgs" (σd), a higgs field that participates in electroweak symmetry breaking but does not give any direct masses to standard model matter fields. if this new field carries charge under a new gauge group, gs, the higgs mass i... | supersymmetry with a sister higgs boson |
dark matter remains as an elusive component of modern cosmology. according to previous research, stellar physics observables can be affected by the presence of hypothetical dark matter particles, which can be produced or accreted into the stars. stellar pulsations are among the observables affected by dark matter, beca... | looking into dark matter with asteroseismology |
we consider diverse deformed bose gas models (dbgms) focusing on distributions and correlations of any order, and also on deformed thermodynamics. for so-called μ -deformed bose gas model ( μ -dbgm), main thermodynamic aspects are treated: total number of particles, deformed partition function, etc. using a geometric a... | geometric aspects and some uses of deformed models of thermostatistics |
the latest experimental results from the lhc and dark matter (dm) searches suggest that the parameter space allowed in supersymmetric theories is subject to strong reductions. these bounds are especially constraining for scenarios entailing light dm particles. previous studies have shown that light neutralino dm in the... | low-mass neutralino dark matter in supergravity scenarios: phenomenology and naturalness |
the identity of dark matter (dm) is one of the relevant 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 (χ ∼10), is used as a benchmark scenario to show that a measurement of the dm rel... | connecting particle physics and cosmology: measuring the dark matter relic density in compressed supersymmetry models at the lhc |
supersymmetric guts based on so(10) gauge group are leading contenders to describe particle physics beyond the standard model. among these the "new minimal supersymmetric so(10) grand unified theory" (nmsgut) based on higgs system 10+120+210+126+$\overline{126}$ has been developing since 1982. it now successfully fits ... | new minimal supersymmetric so(10) gut phenomenology and its cosmological implications |
this thesis describes in detail a search for weakly interacting massive particles as possible dark matter candidates, making use of so-called mono-jet events. it includes a detailed description of the run-1 system, important operational challenges, and the upgrade for run-2. the nature of dark matter, which accounts fo... | search for dark matter with atlas: using events with a highly energetic jet and missing transverse momentum in proton-proton collisions at √s = 8 tev |
if the lhc is able to produce dark matter particles, they would appear at the end of cascade decay chains, manifesting themselves as missing transverse energy. however, such "dark matter candidates" may themselves decay invisibly. we propose to test for this possibility by studying the effect of particle widths on the ... | how to prove that a et excess at the lhc is not due to dark matter |
among dark matter candidates are the weakly interacting massive particles (wimps). low-threshold detectors could directly detect dark matter by measuring the energy deposited by the particles. in this work, we examine the cross-section for the elastic scattering of wimps on nucleons, in the spin-dependent and spin-inde... | mssm wimps-nucleon cross-section for eχ < 500gev |
majorons are the goldstone bosons of spontaneously broken lepton number and hence intimately connected to majorana neutrino masses. since all majoron couplings are heavily suppressed by the seesaw scale they are interesting candidates for long-lived dark matter. the signature decay into two mono-energetic neutrinos is ... | majorons as cold light dark matter |
in the first part of this note, we observe that a non-riemannian piece in the affine connection (a "dark connection") leads to an algebraically determined, conserved, symmetric 2-tensor in the einstein field equations that is a natural dark matter candidate. the only other effect it has, is through its coupling to stan... | dark matter from a dark connection |
motivated by grand unification considerations, we analyze a simple extension of the minimal supersymmetric standard model with additional pairs of vector-like chiral supermultiplets. we focus on the so-called lnd setup, which enlarges the particle content of the minimal model by two vector-like pairs of weak doublets (... | exploring vector-like supersymmetric extensions of the standard model with dark matter and colliders |
the prevalent dark matter (dm) candidate of the (b-l) supersymmetric standard model (blssm) is the right handed (rh) sneutrino. in this work we assess the ability of ground and space based experiments to establish the nature of this particle, through indirect and collider detection. | sneutrino dark matter, constraints and perspectives |
extensions of the standard model which address the hierarchy problem and dark matter (dm) often contain top partners and additional resonances at the tev scale. we explore the phenomenology of a simplified effective model with a vector resonance z', a fermionic vectorlike colored partner of the top quark t' as well as ... | lhc dark matter signals from vector resonances and top partners |
astrophysical observations provide strong evidence that more than 80% of all matter in the universe is in the form of dark matter (dm). two leading candidates of particles beyond the standard model that could constitute all or a fraction of the dm content are the so-called weakly interacting massive particles (wimps) a... | probing dark matter and fundamental physics with the cherenkov telescope array |
we investigate the strongly coupled minimal walking technicolor model (mwt) in the framework of a bottom-up holographic model, where the global su(4) symmetry breaks into $ so(4)$ subgroups. in the holographic model, we found that 125 gev composite higgs particles and small peskin-takeuchi s parameter can be achieved s... | holographic technicolor model and dark matter |
we present a critique on the present status of supersymmetry, based on the viewpoint that its most important motivation in the realm of observable particle phenomenology is the existence of dark matter in the universe. this motivation may as well override the issue of naturalness of the electroweak scale, and it sets u... | first an idol, then an outcast: both for wrong reasons? |
photon colliders (γγ, γe) have been considered a natural addition to e+e- linear-collider projects for more than 30 years [1, 2]. it was a common opinion that such linear collider with four types of colliding beams (plus e+e-) would be the best instrument for the study of particles physics at energies from 100 gev to s... | prospects of high energy photon colliders |
many experiments have searched for supersymmetric wimp dark matter, with null results. this may suggest to look for more exotic possibilities, for example compact ultra-dense quark nuggets, widely discussed in literature with several different names. nuclearites are an example of candidate compact objects with atomic s... | dark matter searches using gravitational wave bar detectors: quark nuggets and newtorites |
e-astrogam is a space mission with unprecedented sensitivity to photons in the mev range, proposed within the esa m5 call. in this note we describe some measurements sensitive to axion-like particles, for which performance in the mev/gev range is of primary importance, and e-astrogam could be the key for discovery. key... | axion-like particles and e-astrogam |
the mass dimension one spinor is a candidate to explain the dark matter content in our universe. this field is an eingenspinor of charge conjugation operator and has a peculiar mass dimension, which restricts its renormalizable interactions with the particles. as a dark matter candidate, its generic signature to be sea... | a tutorial approach on mass dimension one fermions phenomenological analysis |
global symmetry can guarantee the stability of dark matter particles (dmps). however, the nonminimal coupling between dark matter (dm) and gravity can break the global symmetry of dmps, which in turn leads to their decay. under the framework of nonminimal coupling between scalar singlet dark matter (ssdm) and gravity, ... | observational constraints on dark matter decaying via gravity portals |
axions are hypothetical particles related to the violation of the charge-parity symmetry, being the most prone candidates for dark matter. multiple attempts to prove their existence are currently performed in different physical systems. here, we anticipate the possibility of the axions coupling to the electrostatic (la... | axion-plasmon polaritons in strongly magnetized plasmas |
determining the composition of dark matter is at the forefront of modern scientific research. there is compelling evidence for the existence of vast quantities of dark matter throughout the universe, however it has so-far eluded all direct detection efforts and its identity remains a mystery. weakly interacting massive... | ionization collection in detectors of the cryogenic dark matter search |
we continue our study of coleman-weinberg symmetry breaking induced by a third rank antisymmetric tensor scalar, in the context of the su(8) model (adler 2014 int. j. mod. phys. a 29 1450130) we proposed earlier. we focus in this paper on qualitative features that will determine whether the model can make contact with ... | coleman-weinberg symmetry breaking in su(8) induced by a third rank antisymmetric tensor scalar field ii: the fermion spectrum |
the madala hypothesis was proposed by members of the wits-atlas group to account for several anomalies in both atlas and cms data at the lhc. this hypothesis extends the standard model through the addition of two scalar bosons and a hidden sector that can provide a dark matter candidate. this hidden sector interacts wi... | exploring the potential of the dark matter candidate from the madala hypothesis with multi-frequency indirect detection |
short-range forces have important real-world relevance across a range of settings in the nano world, from colloids and possibly for protein folding to nano-mechanical devices, but also for detection of weak long-range forces, such as gravity, at short distances and of candidates to solve the problem of dark energy. sho... | direct measurement of short-range forces with a levitated nanoparticle |
the latest results from two dark matter searches have further ruled out many theoretically attractive dark matter particle candidates. | the relentless hunt for dark matter |
many works, aiming to explain the origin of dark matter or dark energy, consider the existence of hidden (brane)worlds parallel to our own visible world — our usual universe — in a multidimensional bulk. hidden braneworlds allow for hidden copies of the standard model. for instance, atoms hidden in a hidden brane could... | can neutron disappearance/reappearance experiments definitively rule out the existence of hidden braneworlds endowed with a copy of the standard model? |
i use unified spinor fields (usf), to discuss the creation of magnetic monopoles during preinflation, as excitations of the quantum vacuum coming from a condensate of massive charged vector bosons. for a primordial universe with total energy mp, and for magnetic monopoles created with a total planck magnetic charge qm ... | quantum magnetic monopoles at the planck era from unified spinor fields |
the dynamics of symplectic gauge fields provides a consistent framework for fundamental interactions based on spin-3 gauge fields. one remarkable property is that symplectic gauge fields only have minimal couplings with gravitational fields and not with any other field of the standard model. interactions with ordinary ... | symplectic gauge fields and dark matter |
the paper aims to consider the electromagnetic adjoint-field in the complex octonion space as the dark matter field, describing some properties of the dark matter, especially the origin, particle category, existence region, force and so forth. since maxwell applied the algebra of quaternions to depict the electromagnet... | some properties of dark matter field in the complex octonion space |
we consider an extension of the higgs sector in the standard model with six higgs doublets. the gauge couplings are unified without supersymmetry in this model. the lightest of the extra higgs particles, being stabilized by a discrete symmetry imposed from the outset, presents a plausible candidate for dark matter. for... | six-higgs-doublet model for dark matter |
the existence of the neutrino mass and flavor mixing have been experimentally verified. these phenomena strongly motivate to extend the standard model (sm). amongst many possibilities, a simple and interesting extension of the sm can be investigated using a general u$(1)_x$ extension of the sm gauge group. demanding th... | alternative dark matter phenomenology in a general $u(1)_x$ extension of the standard model |
in this pedestrian approach i give my personal point of view on the various problems posed by dark matter in the universe. after a brief historical overview i discuss the various solutions stemming from high energy particle physics, and the current status of experimental research on candidate particles (wimps). in the ... | the dark matter enigma |
we use the ionic hubbard model to study the effects of strong correlations on a two-dimensional semiconductor. the spectral gap in the limit where on-site interactions are zero is set by the staggered ionic potential, while in the strong interaction limit it is set by the hubbard u. combining mean field solutions of th... | semiconductor of spinons: from ising band insulator to orthogonal band insulator |
a strongly interacting massive particle (simp) is an interesting candidate for dark matter (dm) because its self-interaction cross section can be naturally strong enough to address the astrophysical problem of small-scale structure formation. a simple model was proposed by assuming a monopole condensation, where compos... | strongly-interacting massive particle and dark photon in the era of the intensity frontier |
a bose-einstein condensate of the hexaquark particle known as d*(2380) has been recently proposed as a dark matter candidate by the authors in bashkanov & watts 2020. this particle can produced in an abundant condensate state in the early universe and is argued to satisfy all the stability and weak interaction cons... | indirect detection prospects for d*(2380) dark matter |
nowadays deciphering the fundamental nature of dark matter is one of the foremost open questions in fundamental science. in the last years the dark matter experimental program is primarily focused on weakly-interacting massive particles (wimps), but in the recent years many innovative dark matter candidates have emerge... | searching for light dark matter at fixed target experiments |
right-handed neutrinos are a natural extension of the standard model of particle physics. such particles would only interact through the mixing with the left-handed neutrinos, hence they are called sterile neutrinos. if their mass were in the kev-range they would be dark matter candidates. by investigating the electron... | characterization of the detector response to electrons of silicon drift detectors for the tristan project |
in the anisotropic scintillators the light output and the pulse shape for heavy particles (p, α, nuclear recoils) depend on the direction with respect to the crystal axes; the response to γ/β radiation is isotropic instead. this feature offers the possibility to study the directionality approach, which is applicable in... | the adamo project and developments |
susy models with a modified dark sector require constraints to be reinterpreted, which may allow for scenarios with low tuning. a modified dark sector can also change the phenomenology greatly. the addition of the qcd axion to the minimal supersymmetric standard model (mssm) solves the strong cp problem and also modifi... | modified supersymmetric dark sectors |
although weakly interacting massive particle (wimp) scenario is very well motivated, it is not guaranteed to be the truth. it is important to keep mind open and consider other well-motivated scenarios. in this paper, we briefly review several possible non-wimp dark matter (dm) candidates. first, we discuss details on a... | unconventional dark matter models: a brief review |
the model of physics resulting from a kaluza-klein dimensional reduction procedure offers very good dark matter candidates in the form of light kaluza-klein particles, and thus becomes relevant to cosmology. in this work we utilize an analytically known, kasner-type, attractor solution. it is shown that for a plethora ... | reconstruction of cosmological evolution in the presence of extra dimensions |
the standard theoretical estimation of the thermal dark matter abundance may be significantly altered if properties of dark matter particles in the early universe and at the present cosmological epoch differ. this may happen if, e.g., a cosmological phase existed in the early universe during which dark matter particles... | thermal dark matter abundance under non-standard macroscopic conditions in the early universe |
theories beyond the standard model predict dark matter candidates that could provide a significant enhancement of the antideuteron and antiproton flux, in particular at low energies. the general antiparticle spectrometer (gaps) experiment is the first antimatter search experiment designed specifically for low-energy co... | gaps: a balloon-borne cosmic-ray antimatter experiment |
neutralino annihilation in the galactic halo is the most definite observational signature proposed for indirect registration of the susy dark matter (dm) candidate particles. the corresponding annihilation signal (in the form of gamma-rays, positrons and antiprotons) may be boosted for one or three orders of magnitude ... | susy dark matter annihilation in the galactic halo |
we show that in a wide class of string derived models of particle physics, heavy string modes with masses around the gut scale can serve as a viable dark matter candidate. these heavy string modes wind around specific cycles in the extra-dimensional space, closely related to the fundamental group π1. as a consequence o... | string scale interacting dark matter from π1 |
the supersymmetric so(10) theory ("nmso(10)gut") based on the\hfil\break ${\bf{210+126 +\oot}}$ higgs system proposed in 1982 has evolved into a realistic theory capable of fitting the known low energy particle physics data besides providing a dark matter candidate and embedding inflationary cosmology. it dynamically r... | new minimal so(10) gut: a theory for all epochs |
in the present work, we show that the galactic center excess (gce) emission, as recently updated by the fermi-lat collaboration, could be explained by a mixture of fermi-bubbles-like emission plus dark matter (dm) annihilation, in the context of a scalar-singlet higgs portal scenario (shp). in fact, the standard shp, w... | extended higgs-portal dark matter and the fermi-lat galactic center excess |
we propose a model to explain the tiny masses of neutrinos with lepton number conservation, where neither too heavy particles beyond the tev-scale nor tiny coupling constants are required. assignments of conserving lepton numbers to new fields result in an unbroken z2 symmetry that stabilizes the dark matter candidate ... | neutrino mass without lepton number violation, dark matter; and a strongly first-order phase transition |
a wealth of astrophysical research supports the existence of dark matter in the universe, yet the exact identity and nature of this unknown particle remain elusive. the weakly interacting massive particle (wimp), one of the most promising dark matter candidates, is thought to interact with standard model particles only... | an effective field theory analysis of the first lux dark matter search |
the addition of the qcd axion to the minimal supersymmetric standard model (mssm) not only solves the strong c p problem but also modifies the dark sector with new dark matter candidates. while supersymmetry (susy) axion phenomenology is usually restricted to searches for the axion itself or searches for the ordinary s... | exploring the hadronic axion window via delayed neutralino decay to axinos at the lhc |
because of the reduced dielectric screening and enhanced coulomb interactions, two-dimensional (2d) materials like phosphorene and transition metal dichalcogenides (tmds) exhibit strong excitonic effects, resulting in fascinating many-particle phenomena covering both intralayer and interlayer excitons. their intrinsic ... | excitons in two-dimensional materials |
we present a new paradigm for the production of dark-matter particles called the spontaneous freeze out, in which the decoupling from the thermal bath is enforced by the sudden increase of the dark-matter mass, due to the spontaneous breaking of some global symmetry rather than by the slow decrease of the temperature. ... | spontaneous freeze out of dark matter |
in the present work we examine the implications on dark matter searches of the possibility of a partial decay of a neutron into a dark matter particle, slightly lighter than itself. such a scenario recently proposed is required to bridge the discrepancy between the results of two different experiments measuring the lif... | searching for light wimps in view of neutron decay to dark matter |
many results from astrophysical observations point to a 27% contribution of non-baryonic dark matter to the mass-energy budget of the universe. although still elusive, strongly motivated candidates in form of weakly interacting massive particles could explain the nature of dark matter, and their annihilation or decay w... | search for gamma-ray line signatures with h.e.s.s. |
we study the 2010 specific version of the 2002 proposed u(1)x extension of the supersymmetric standard model, which has no μ term and conserves baryon number and lepton number separately and automatically. we consider in detail the scalar sector as well as the extra zx gauge boson, and their interactions with the neces... | phenomenology of the utilitarian supersymmetric standard model |
in this paper, we discuss the minimal supersymmetric standard model (mssm) extended with one vectorlike lepton doublet l -l ¯ and one right-handed neutrino n . the neutral vecotorlike sneutrino can be a candidate of dark matter. to avoid the interaction with the nucleons by exchanging a z boson, the mass splitting betw... | vectorlike sneutrino dark matter |
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