abstract stringlengths 3 192k | title stringlengths 4 857 |
|---|---|
magnetic fields vary in complexity for different stars. the stability of dipolar magnetic fields is known to depend on different quantities, e.g., the stellar rotation, the stratification, and the intensity of convective motions. here, we study the dipolar stability in a system with an inner stable zone. we present pre... | dipolar stability in spherical simulations: the impact of an inner stable zone |
asteroseismology has revealed that cores of red giants rotate about one order of magnitude faster than their convective envelopes. this paper attempts an explanation for this rotational state in terms of the theory of angular momentum transport in stellar convection zones. a differential rotation model based on the the... | modelling differential rotation of red giants: the case of the evolved sun |
a turbulent transport of radiation in the solar convective zone is investigated. the mean-field equation for the irradiation intensity is derived. it is shown that due to the turbulent effects, the effective penetration length of radiation can be increased several times in comparison with the mean penetration length of... | turbulent transport of radiation in the solar convective zone |
spectroscopic analyses are a crucial tool for investigating properties of stars and supernovae (sne) which in turn provide constraints on stellar and galactic evolution. cmfgen is a time-dependent non-lte radiative transfer code designed to model the spectra of stars and sne. it is available online and is used at many ... | cmfgen: a key spectroscopic tool for astrophysicists |
the study of lithium (li) surface abundance in the sun and young stellar globular clusters which are seemingly anomalous in present-day scenarios, as well as the influence of rotation and magnetic braking (mb) on its depletion during pre-main sequence (pms) and main sequence (ms). in this work, the effects of rotationa... | study of the effects of magnetic braking on the lithium abundances of the sun and solar-type stars |
the proper simulation of convection and clouds is the biggest challenge in estimating the climate and habitability of exoplanets. given the lack of in-situ observations, the best solution to this problem is to utilize cloud-resolving models (crms), which have fine resolution and explicitly calculate non-hydrostatic con... | explicit atmospheric convection and the climate and habitability of tidally locked planets |
the present-day quality of asteroseismic data enables us to probe the complex outer layers of sun-like stars. f stars are particularly interesting, given their diversity of magnetic and rotational behaviours. using a seismic diagnostic based on the phase shift of the acoustic waves, we found a trend, in the form of a p... | the relevance of partial ionization in the outer layers of f stars |
recent observations of rossby waves and other more exotic forms of inertial oscillations in the sun's convection zone have kindled the hope that such waves might be used as a seismic probe of the sun's interior. here we present a 3d numerical simulation in spherical geometry that models the sun's convection zone and up... | inertial waves in a nonlinear simulation of the sun's convection zone and radiative interior |
in this thesis, we explore the thermal and orbital evolution of rocky and icy worlds that are under the influence of strong tidal forcing. tides are an important mechanism that extracts energy from the orbit and spin of a planet or moon and deposits it, via frictional heating, into its interior. the efficiency of tidal... | a study of the tidal and thermal evolution of rocky & icy worlds utilizing advanced rheological models |
most current models of low mass red giant stars do not reproduce the observed position of the red giant branch luminosity bump, a diagnostic of the maximum extent of the convective envelope during the first dredge up. global asteroseismic parameters, the large frequency separation and frequency of maximum oscillation p... | cool stars 21: mixed mode asteroseismology of red giant stars through the luminosity bump |
in the current study, we present the first photometric, period variation, and flaring activity investigations of tic 24233294. additionally, we also review and report the flaring activity of five well-studied eclipsing binaries bx tri, v405 and, gj 3236, thor 42, and gu boo. using the transiting exoplanet survey satell... | the first photometric, period variation, and flare activity studies of tic 24233294: reviewing with the latest results of well-studied late-type active binaries |
the sunspot penumbra is usually observed in the photosphere and it is of particular interest for its magnetoconvection, which seems to transport the heat from the top of the convection zone into the solar atmosphere. it is well known that the penumbra magnetic field extends into the upper layers of the solar atmosphere... | observations of the chromospheric evershed flow of sunspot penumbra with the application of the self-organizing map technique |
parker (1983) suggested a mechanism for the formation of current sheets (css) in the solar atmosphere. his main idea was that the tangling of coronal magnetic field lines by photospheric random flows facilitates the continuous formation of css in the solar atmosphere. this part of his idea represents one of the many wa... | are nanoflares responsible for coronal heating? |
barnard's star is among the most studied stars given its proximity to the sun. it is often considered $the$ radial velocity (rv) standard for fully convective stars due to its rv stability and equatorial declination. recently, an $m \sin i = 3.3 m_{\oplus}$ super-earth planet candidate with a 233 day orbital period was... | stellar activity manifesting at a one year alias explains barnard b as a false positive |
the advent of ultra‑precise photometry space missions enables the possibility of investigating stellar interiors with mixed modes. the structural variations induced by the discontinuity of the chemical composition left behind during the first dredge–up is an important feature in the stellar mid‑layers located between t... | contributions of structural variations to the asymptotic mixed‑mode coupling factor in red giant stars |
theoretical models show the main sequence gap is a result of the mixing of 3he during the merger of envelope and core convection zones. unlike stars the either side of the gap, stars in a narrow mass range will go through instability phases, where their dynamos could switch between the αω dynamo like the sun and ω2 dyn... | understanding stars close to the gap |
the recent discovery of a gap in the early solar system (borlina et al., 2021) follows a prediction to look for precursors in proto-planetary disks of a ``peak-gap-peak'' (pgp) feature in the distribution of semi-major axes of exoplanets hosted by stars that are most like the sun, or more metal-rich than the sun. proto... | newly discovered gap in the early solar system is in same place as the ``peak-gap-peak'' of exoplanet semi-major axes |
carbon-enhanced metal-poor (cemp) stars in the galactic halo have a wide range of neutron-capture element abundance patterns. to identify their origin, we investigate three modes of s-process nucleosynthesis that have been proposed to operate in extremely metal-poor asymptotic giant branch (agb) stars: convective 13c b... | a comparative study of three modes of s-process nucleosynthesis in extremely metal-poor agb stars |
to explore overshoot mixing and rotational mixing beyond the convective core during the core he-burning phase in massive stars, we computed a grid of stellar models, both rotating and nonrotating, with the k - ω model at z = 0.02, covering a mass range of 25-120 m ⊙. the rotating models start with a rotation rate of v ... | grids of wolf-rayet stars using mesa with the k - ω model: from 25 to 120 m ⊙ at z = 0.02 |
stably stratified layers may be present at the top of the electrically conducting fluid layers of many planets either because the temperature gradient is locally subadiabatic or because a stable composition gradient is maintained by the segregation of chemical elements. here we study the double-diffusive processes taki... | fingering convection in the stably stratified layers of planetary cores |
mapping the large-scale subsurface plasma flow profile within the sun has been attempted using various methods for several decades. one such flow in particular is the meridional circulation, for which numerous studies have been published. however, such studies often show disagreement in structure. in an effort to const... | inferring the solar meridional circulation flow profile by applying bayesian methods to time-distance helioseismology |
the runaway greenhouse effect is a very interesting process for terrestrial planets, studied in particular to determine the inner limit of the habitable zone (hz). this limit is usually defined via the calculation of the asymptotic limit of thermal emission of the planet (olr = outgoing longwave radiation), also called... | revisiting the full runaway greenhouse evolution with a 3d global climate model |
convection is a key transport phenomenon important in many different areas, from hydrodynamics and ocean circulation to planetary atmospheres or stellar physics. however, its microscopic understanding still remains challenging. here we numerically investigate the onset of convective flow in a compressible (non-oberbeck... | molecular hints of two-step transition to convective flow via streamline percolation |
a poster for the cool stars 20.5 virtual conference. based on this paper:jermyn, tayar, & fuller 2020: https://academic.oup.com/mnras/article/491/1/690/5607798abstract:over time, tides synchronize the rotation periods of stars in a binary system to the orbital period. however, if the star exhibits differential rota... | tides, differential rotation, and eclipsing binaries |
we analyze various tracers of magnetic activity for 23 solar twins which are characterized by significant scatter of lithium abundance in their atmospheres. a level of coronal and chromospheric activity has been studied from available x-ray and uv-archival data. it gives us a chance to compare coronae of solar twins of... | activity of selected solar twins |
ring-diagram analysis is a standard local helioseismic technique. data from the helioseismic and magnetic imager (hmi) onboard the solar dynamics observatory (sdo) are routinely used for ring-diagram analysis, and fits to the power spectra as well as inversion results are standard data products. in this article we exam... | hmi ring-diagram analysis: effects of tracking, noise, and resolution |
tight binary or multiple-star systems can interact through mass transfer and follow vastly different evolutionary pathways than single stars. the star tyc 2597-735-1 is a candidate for a recent stellar merger remnant resulting from a coalescence of a low-mass companion with a primary star a few thousand years ago. this... | x-ray emission from candidate stellar merger remnant tyc 2597-735-1 and its blue ring nebula |
in marked contrast to models of accretion disks around stellar mass black holes, neutron stars, and in cataclysmic variables, existing theoretical models of accretion disks around supermassive black holes do a very poor job of explaining, never mind predicting, the observed properties of luminous active galactic nuclei... | accretion disks around supermassive black holes with realistic opacity |
magnetic flux emergence from the solar interior to the atmosphere is believed to be a key process in the formation of solar active regions and driving solar eruptions. due to the limited capabilities of observations, the flux emergence process is commonly studied using numerical simulations. in this paper, we develop a... | numerical simulation of solar magnetic flux emergence using the amr-cese-mhd code |
contemporary three-dimensional physics-based simulations of the solar convection zone disagree with observations. they feature differential rotation substantially different from the true rotation inferred by solar helioseismology and exhibit a conveyor belt of convective "busse" columns not found in observations. to he... | differential rotation in convecting spherical shells with non-uniform viscosity and entropy diffusivity |
opacities were required to increase by the divergence in the depth of the convective zone derived from the solar models and helioseismology. recent experiments carried out on the z-pinch, in temperature and density regimes relevant to the convective zone, have found an increase in the opacities of iron. the measured wa... | influence of stellar opacities on the loops of an intermediate-mass star in the hertzsprung-russell diagram |
stellar dynamos support large star spots in the turbulent convective zones of cool stars. we use a modified version of the apogee survey pipeline to detect and characterize the spot filling factor and temperature contrast in cool dwarfs and report results in benchmark open clusters. our star spot - rossby number relati... | starspots and magnetism: testing the activity paradigm in the pleiades and m67 |
we have been studying convection, mass entrainment, and mixing processes in the convective boundary region as well as the radiative envelope for a model star of 25 solar masses using the 3-d stellar hydrodynamics code ppmstar. we will report on the portion of this work that focuses on the effects of radiation pressure ... | a new 1-d core convection zone model including the penetration region |
iron is the dominant heavy element that plays an important role in radiation transport in stellar interiors. owing to its abundance and large number of bound levels and transitions, iron ions determine the opacity more than any other astrophysically abundant element. a few iron ions constitute the abundance and opacity... | r-matrix calculations for opacities.ii. photoionization and oscillator strengths of iron ions fexvii, fexviii and fexix |
the light element lithium is fragile in stars, making it a sensitive diagnostic of mixing processes in stellar interiors. the seminal skumanich 1972 paper provided a powerful clue, with a correlation between stellar spin down and lithium depletion. in this review i will summarize the key observed features of lithium de... | lithium in time (invited review) |
the discovery of main-sequence gap, where it marks the partially and fully convective boundary, reveals a unique type of m dwarfs with an interior structure that changes between one and three layers of energy transport. to make a connection between this unstable interior and atmospheric activity, we present results fro... | hα activity near mid-m dwarf transition boundary and a newly identified hα emission deficiency zone on the main sequence |
context. the centrifugal force is often omitted from simulations of stellar convection either for numerical reasons or because it is assumed to be weak compared to the gravitational force. however, the centrifugal force might be an important factor in rapidly rotating stars, such as solar analogs, due to its ω2 scaling... | effects of the centrifugal force in stellar dynamo simulations |
in the overshoot mixing model with an exponentially decreasing diffusion coefficient, the initial value of the diffusion coefficient plays a crucial role. according to the turbulent convective mixing model, the characteristic length of convection in the convection zone differs from that in the overshoot region, resulti... | asteroseismic investigation on kic 10526294 to probe convective core overshoot mixing |
context. radial differential rotation is an important physical ingredient in stellar dynamo theory. in the case of the sun, heliosismology techniques have revealed the existence of a near-surface shear layer covering 15-20% of the upper convection zone. it was recently shown that the rotation velocity gradient is not u... | rotational radial shear in the low solar photosphere |
context. the shearing motion of tidal flows that are excited in non-equilibrium binary stars transform kinetic energy into heat via a process referred to as tidal heating.aims: we aim to explore the way tidal heating affects the stellar structure.methods: we used the tides code, which solves the equations of motion of ... | structure and evolution of a tidally heated star |
modeling of massive star envelopes has remained a challenge in stellar physics for several decades. due to the complex physics involved, only 1d models of stellar envelopes can be evolved over the full lifetime of massive stars. the intricate interactions between matter and radiation in higher dimensions require accura... | understanding turbulence in massive star envelopes — impacts of near-surface convection zones on stellar structure and observables |
the efficiency of coronal heating ɛ(cor) in a star can be quantified by l x/l bol, i.e., the ratio of x-ray luminosity to bolometric luminosity. the efficiency of chromospheric heating in the same star ɛ(chr) is typically assumed to be proportional to l(hα)/l bol or l(ca k)/l bol where the lines hα and ca k are often t... | mechanical energy deposition in cool star atmospheres: resonant coupling to coronal loops in m dwarfs |
context. a number of he-rich hot subdwarf stars present high abundances for trans-iron elements, such as sr, y, zr, and pb. diffusion processes are important in hot subdwarf stars and it is generally believed that the high abundances of heavy elements in these peculiar stars are due to the action of radiative levitatio... | a self-synthesized origin for heavy metals in hot subdwarf stars |
transport of chemical elements in main-sequence stars is still far from being understood and is responsible for large uncertainties in stellar models. the competition between all transport processes leads to variations of stellar abundances. this is only when taking all these processes into account that we will be able... | possible detection of penetrative convection in f-type stars with asteroseismology |
dark fermentation of organic biomass, i.e. agricultural residues, agro-industrial wastes and organic municipal waste is a promising technology for producing renewable biohydrogen. in spite of its potential, this technology needs further research and development to improve the biohydrogen yield by optimizing substrate u... | a review on dark fermentative biohydrogen production from organic biomass: process parameters and use of by-products |
we study evolution of self-interacting dark matter subhalos in the milky way tidal field. the interaction between the subhalos and the milky way's tides lead to more diverse dark matter distributions in the inner region, compared to their cold dark matter counterparts. we test this scenario with two milky way satellite... | self-interacting dark matter subhalos in the milky way's tides |
high-entropy alloys (heas) are an exciting new class of multi-component alloys some of which have unusual and remarkable properties. as of yet, little is understood about dislocation core structure and stacking fault energies in these alloys. for this study, a five-component, equiatomic alloy (crmnfeconi) was deformed ... | atomic-scale characterization and modeling of 60° dislocations in a high-entropy alloy |
we outline two important effects that are missing from most evaluations of the dark matter capture rate in neutron stars. as dark matter scattering with nucleons in the star involves large momentum transfer, nucleon structure must be taken into account via a momentum dependence of the hadronic form factors. in addition... | nucleon structure and strong interactions in dark matter capture in neutron stars |
we develop a formalism to describe electron ejections from graphenelike targets by dark matter (dm) scattering for general forms of scalar and spin-1/2 dm-electron interactions, and we compare their applicability and accuracy within the density functional theory (dft) and tight-binding (tb) approaches. this formalism a... | direct searches for general dark matter-electron interactions with graphene detectors: part i. electronic structure calculations |
the anais (annual modulation with nai(tl) scintillators) experiment aims at the confirmation or refutation of the dama/libra positive annual modulation signal in the low energy detection rate, using the same target and technique, at the canfranc underground laboratory (lsc) in spain. anais-112, consisting of nine 12.5 ... | analysis of backgrounds for the anais-112 dark matter experiment |
many experiments that interrogate fundamental theories require detectors whose sensitivities are limited by the laws of quantum mechanics. in cavity-based searches for axionic dark matter, vacuum fluctuations in the two quadratures of the cavity electromagnetic field limit the sensitivity to an axion-induced field. in ... | squeezed vacuum used to accelerate the search for a weak classical signal |
we examine updated prospects for detecting wimps in supersymmetric models via direct and indirect dark matter search experiments. we examine several historical and also still viable scenarios: projections for well-tempered neutralinos (wtn), projections from the mastercode (mc), bayesfits (bf) and fittino (fo) collabor... | susy under siege from direct and indirect wimp detection experiments |
in this work, we apply relativistic mean-field theory in neutron stars assuming that fermionic dark matter is trapped inside the star and interacts directly with neutrons by exchanging standard model higgs bosons. for realistic values of the parameters of the model, we compute numerically the equation of state, and we ... | dark matter effect on realistic equation of state in neutron stars |
we study the post-inflationary dynamics for reheating and freeze-in dark matter in the higgs-r2 inflation model. taking the perturbative approach for reheating, we determine the evolution of the temperature for radiation bath produced during reheating and determine the maximum and reheating temperatures of the universe... | reheating and dark matter freeze-in in the higgs-r2 inflation model |
we present a qcd axion model where the couplings of the axion to nucleons, electrons, and muons are naturally suppressed because of the appropriate choice of the peccei-quinn charges of the standard model fermions. we reexamine next-to-leading order corrections to the couplings of the axion with nucleons and photons an... | naturally astrophobic qcd axion |
a light leptophilic boson (scalar or pseudoscalar) has been postulated to explain the muon g-2 anomaly and could be a portal to dark matter. realizing the leptophilic nature of a singlet boson in the framework of the two-higgs-doublet-model of type-x, we identify the parameter space viable for the explanation of the up... | leptophilic bosons and muon g-2 at lepton colliders |
small fluctuations around homogeneous and isotropic expanding backgrounds are the main object of study in cosmology. their origin and evolution is sensitive to the physical processes that happen during inflation and in the late universe. as such, they hold the key to answering many of the major open questions in cosmol... | snowmass white paper: effective field theories in cosmology |
the exploration of long-lived particles in the mev-gev region is a formidable task but it may provide us a unique access to dark sectors. fixed-target facilities with sufficiently energetic and intense proton beams are an ideal tool for this challenge. in this work we show that the production rate of axion-like-particl... | light in the beam dump. axion-like particle production from decay photons in proton beam-dumps |
in the present work, we study a new model of anisotropic compact stars in the regime of the rastall theory. to solve the rastall field equations we have used the karori and barua (kb) ansatz along with the quintessence dark energy characterized by a parameter ωq with -1 <ωq<-1/3 . we present a comparative study t... | a new model of quintessence compact stars in the rastall theory of gravity |
we study the possibility of identifying dark matter in the galactic center from the physical properties of the electromagnetic radiation emitted from an optically-thin disk region around a static and spherically symmetric black hole. in particular, we consider two specific models for the optical-thin disk region: a gas... | imprints of dark matter on black hole shadows using spherical accretions |
searches for dijet resonances with sub-tev masses using the atlas detector at the large hadron collider can be statistically limited by the bandwidth available to inclusive single-jet triggers, whose data-collection rates at low transverse momentum are much lower than the rate from standard model multijet production. t... | search for low-mass dijet resonances using trigger-level jets with the atlas detector in $pp$ collisions at sqrt(s)=13 tev |
using tsallis statistics and its relation with boltzmann entropy, the tsallis entropy content of black holes is achieved, a result in full agreement with a recent study (mejrhit and ennadifi in phys lett b 794:24, 2019). in addition, employing kaniadakis statistics and its relation with that of tsallis, the kaniadakis ... | generalized entropies and corresponding holographic dark energy models |
we present measurements of the electron-recoil (er) response of the lux dark matter detector based upon 170 000 highly pure and spatially uniform tritium decays. we reconstruct the tritium energy spectrum using the combined energy model and find good agreement with expectations. we report the average charge and light y... | tritium calibration of the lux dark matter experiment |
we present a background model for dark matter searches using an array of nai(tl) crystals in the cosine-100 experiment that is located in the yangyang underground laboratory. the model includes background contributions from both internal and external sources, including cosmogenic radionuclides and surface 210pb contami... | background modeling for dark matter search with 1.7 years of cosine-100 data |
we introduce warm quintessential inflation and study it in the weak dissipative regime. we consider the original quintessential inflation model, which approximates quartic chaotic inflation at early times and thawing quartic inverse-power-law quintessence at present. we find that the model successfully accounts for bot... | warm quintessential inflation |
dark photons are hypothetical massive vector particles that could mix with ordinary photons. the simplest theoretical model is fully characterised by only two parameters: the mass of the dark photon mγd and its mixing parameter with the photon, ε . the sensitivity of the ship detector is reviewed for dark photons in th... | sensitivity of the ship experiment to dark photons decaying to a pair of charged particles |
the constituents of dark matter are still unknown, and the viable possibilities span a vast range of masses. the physics community has established searching for sub-gev dark matter as a high priority and identified accelerator-based experiments as an essential facet of this search strategy. a key goal of the accelerato... | current status and future prospects for the light dark matter experiment |
in the last few decades, extensions of general relativity have reached always more attention especially in view of possible breakdowns of the standard λ cdm paradigm at intermediate and high redshift regimes. if general relativity would not be the ultimate theory of gravity, modifying einstein's gravity in the homogene... | kinematic reconstructions of extended theories of gravity at small and intermediate redshifts |
using a data set of 2.93 fb-1 taken at a center-of-mass energy √{ s} = 3.773 gev with the besiii detector at the bepcii collider, we perform a search for an extra u(1) gauge boson, also denoted as a dark photon. we examine the initial state radiation reactions e+e- →e+e-γisr and e+e- →μ+μ-γisr for this search, where th... | dark photon search in the mass range between 1.5 and 3.4 gev/c2 |
a notable feature of uv freeze-in is that the relic density is strongly dependent on the highest temperatures of the thermal bath, and a common assumption is that the relevant "highest temperature" should be the reheating temperature after inflation trh. however, the temperature of the thermal bath can be significantly... | ultraviolet freeze-in and non-standard cosmologies |
cosmological tensions can arise within the lamda cold dark matter scenario amongst different observational windows, which may indicate new physics beyond the standard paradigm if confirmed by measurements. in this article, we report how to alleviate both the h0 and σ8 tensions simultaneously within torsional gravity fr... | interpreting cosmological tensions from the effective field theory of torsional gravity |
the heavy photon search experiment took its first data in a 2015 engineering run using a 1.056 gev, 50 na electron beam provided by cebaf at the thomas jefferson national accelerator facility, searching for a prompt, electroproduced dark photon with a mass between 19 and 81 mev /c2 . a search for a resonance in the e+e... | search for a dark photon in electroproduced e+e- pairs with the heavy photon search experiment at jlab |
dark photon (a‧) that couples to the standard model fermions via the kinetic mixing with photons and serves as a mediator of dark matter production could be observed in the high-energy electron scattering e- + z →e- + z +a‧ off nuclei followed by the bremsstrahlung a‧ → invisible decay. we cross check the exact tree-le... | the exact tree-level calculation of the dark photon production in high-energy electron scattering at the cern sps |
inspired by the recent measurements of the muon and electron anomalous magnetic moments, the rapid progress of the lhc search for supersymmetry, and the significantly improved sensitivities of dark matter direct detection experiments, we studied the supersymmetric contribution to the electron g -2 , aesusy, in the next... | electron and muon anomalous magnetic moments in the z3-nmssm |
the na62 experiment at cern, designed to study the ultra-rare decay k+ → π+ν ν ¯, has also collected data in beam-dump mode. in this configuration, dark photons may be produced by protons dumped on an absorber and reach a decay volume beginning 80 m downstream. a search for dark photons decaying in flight to μ+μ− pairs... | search for dark photon decays to μ+μ− at na62 |
many extensions of the standard model predict the production of dark matter particles at the lhc. sufficiently light dark matter particles may be produced in decays of the higgs boson that would appear invisible to the detector. this letter presents a statistical combination of searches for h →invisible decays where mu... | combination of searches for invisible decays of the higgs boson using 139 fb-1 of proton-proton collision data at √{ s } = 13 tev collected with the atlas experiment |
light-matter coupling involving classical and quantum light offers a wide range of possibilities to tune the electronic properties of correlated quantum materials. two paradigmatic results are the dynamical localization of electrons and the ultrafast control of spin dynamics, which have been discussed within classical ... | quantum to classical crossover of floquet engineering in correlated quantum systems |
in this study of the inert doublet model (idm), we propose that the dijet + missing transverse energy channel at the large hadron collider (lhc) will be an effective way of searching for the scalar particles of the idm. this channel receives contributions from gauge boson fusion, and t-channel production, along with co... | exploring the inert doublet model through the dijet plus missing transverse energy channel at the lhc |
for the last 100 years, general relativity (gr) has taken over the gravitational theory mantle held by newtonian gravity for the previous 200 years. this article reviews the status of gr in terms of its self-consistency, completeness, and the evidence provided by observations, which have allowed gr to remain the champi... | general relativity and cosmology: unsolved questions and future directions |
the collective light-matter interaction in microcavities gives rise to the intriguing phenomena of cavity-mediated transport that can potentially overcome the anderson localization. yet, an accurate theoretical treatment is challenging as the matter (e.g., molecules) is subject to large energetic disorder. in this pape... | unusual dynamical properties of disordered polaritons in microcavities |
large arrowhead matrices with randomly distributed entries describe a variety of important phenomena where a degree of freedom is nonlocally coupled to a disordered continuum of modes, including central-spin problems in condensed matter, molecular junctions, and quantum emitters in cavity qed. here we provide an exact ... | large random arrowhead matrices: multifractality, semilocalization, and protected transport in disordered quantum spins coupled to a cavity |
we present a frequentist analysis of the parameter space of the pmssm10, in which the following ten soft susy-breaking parameters are specified independently at the mean scalar top mass scale : the gaugino masses , the first-and second-generation squark masses , the third-generation squark mass , a common slepton mass ... | the pmssm10 after lhc run 1 |
motivated by the work of saridakis (phys. rev. d 102, 123525 (2020)), the present study reports the cosmological consequences of barrow holographic dark energy (hde) and its thermodynamics. the literature demonstrates that dark energy (de) may result from electroweak symmetry breaking that triggers a phase transition f... | thermodynamics of barrow holographic dark energy with specific cut-off |
the object of this article is to study a new class of dark energy stars in the background of gravity by using the metric potentials proposed by krori‑barua [j. phys. a, math. gen. 8:508 (1975)]. to achieve the goal, a quadratic form of as is taken into account for the static spherically symmetric spacetime,`a' being a ... | existence of dark energy stars within lower mass gap in the realm of f(q)f(q) gravity |
autoencoders are an effective analysis tool for the lhc, as they represent one of its main goal of finding physics beyond the standard model. the key challenge is that out-of-distribution anomaly searches based on the compressibility of features do not apply to the lhc, while existing density-based searches lack perfor... | a normalized autoencoder for lhc triggers |
it is well known that one cannot apply a conformal transformation to f (t ) gravity to obtain a minimally coupled scalar field model, and thus no einstein frame exists for f (t ) gravity. furthermore nonminimally coupled "teleparallel dark energy models" are not conformally equivalent to f (t ) gravity. however, it can... | conformal transformations in modified teleparallel theories of gravity revisited |
in this work we present a further investigation about teleparallel gravity cosmology. we demonstrate that according to the current astrophysical data (cc + pantheon + bao samplers with late universe measurements sh0es + h0licow), an f(t, b) theory can provide another interpretation to the oscillatory behaviour of the d... | cosmological viable models in f(t, b) theory as solutions to the h0 tension |
a generally covariant version of erik verlinde's emergent gravity model is proposed. the lagrangian constructed here allows an improved interpretation of the underlying mechanism. it suggests that de sitter space is filled with a vector field that couples to baryonic matter and, by dragging on it, creates an effect sim... | covariant version of verlinde's emergent gravity |
in this work we study a non-flat friedmann-robertson-walker universe filled with a pressure-less dark matter (dm) and barrow holographic dark energy (bhde) whose ir cutoff is the apparent horizon. among various de models, (bhde) model shows the dynamical enthusiasm to discuss the universe's transition phase. according ... | barrow hde model for statefinder diagnostic in non-flat frw universe |
the bubble wall velocity is essential for the spectra of phase-transition gravitational waves, electroweak baryogenesis and the dynamical dark matter mechanism. we perform detailed calculations of the bubble wall velocity in the well-motivated inert doublet model using the microphysical approach with some recent new me... | bubble wall velocity during electroweak phase transition in the inert doublet model |
we show how weakly supervised machine learning can improve the sensitivity of lhc mono-jet searches to new physics models with anomalous jet dynamics. the classification without labels (cwola) method is used to extract all the information available from low-level detector information without any reference to specific n... | boosting mono-jet searches with model-agnostic machine learning |
we propose a novel dark matter (dm) scenario based on a first-order phase transition in the early universe. if dark fermions acquire a huge mass gap between true and false vacua, they can barely penetrate into the new phase. instead, they get trapped in the old phase and accumulate to form macroscopic objects, dubbed f... | fermi-ball dark matter from a first-order phase transition |
we show that the excess events observed in a number of recent lhc resonance searches can be simultaneously explained within a minimal non-supersymmetric left-right inverse seesaw model for neutrino masses with $w_r$ mass around 1.9 tev. we further show that the minimal tev-scale particle content that leads to gauge cou... | unified explanation of the $eejj$, diboson and dijet resonances at the lhc |
we present high-precision theoretical predictions for the electron energy spectra for the ground-state to ground-state β decays of 214pb, 212pb, and 85kr most relevant to the background of liquid xenon dark matter detectors. the effects of nuclear structure on the spectral shapes are taken into account using large-scal... | improved calculations of β decay backgrounds to new physics in liquid xenon detectors |
we employ an effective field theory to study the detectability of sub-gev dark matter through its interaction with the gapless excitations of superfluid ^4he. in a quantum field theory language, the possible interactions between the dark matter and the superfluid phonon are solely dictated by symmetry. we compute the r... | sub-gev dark matter in superfluid he-4: an effective theory approach |
this work is devoted to the study of wormhole solutions in the framework of gravitational decoupling by means of the minimal geometric deformation scheme. as an example, to analyze how this methodology works in this scenario, we have minimally deformed the well-known morris-thorne model. the decoupler function f(r) and... | minimally deformed wormholes |
the present paper is devoted to investigating the possibility of getting stellar interiors for ultra-dense compact spherical systems portraying an anisotropic matter distribution, employing the gravitational decoupling by means of minimal geometric deformation (mgd) procedure within the modified theory of gravity: f(r ... | gravitational decoupling minimal geometric deformation model in modified f(r , t) gravity theory |
we reformulate the calculation of the dark matter-nucleon scattering cross sections based on the method of effective field theories. we assume that the scatterings are induced by the exchange of colored mediators, and construct the effective theories by integrating out the colored particles. all of the leading order ma... | effective theories for dark matter nucleon scattering |
coupling molecules to the confined light modes of an optical cavity is showing great promise for manipulating chemical reactions. however, to fully exploit this principle and use cavities as a new tool for controlling chemistry, a complete understanding of the effects of strong light-matter coupling on molecular dynami... | multi-scale dynamics simulations of molecular polaritons: the effect of multiple cavity modes on polariton relaxation |
in gauge-yukawa systems embedded in the framework of trans-planckian asymptotic safety we discuss the dynamical generation of arbitrarily small yukawa couplings driven by the presence of a non-interactive infrared-attractive fixed point in the renormalization group flow. additional ultraviolet-attractive fixed points g... | naturally small yukawa couplings from trans-planckian asymptotic safety |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.