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the cosmological-constant (λ) cold dark matter (cdm) model is challenged by the hubble tension, a remarkable difference of hubble constant h0 between measurements from local probes and the prediction from planck cosmic microwave background observations under λcdm model. so one urgently needs new distance indicators to ... | an 8 per cent determination of the hubble constant from localized fast radio bursts |
ordered atomic arrays with subwavelength spacing have emerged as an efficient and versatile light-matter interface, where collective interactions give rise to sets of super- and subradiant lattice states. here, we demonstrate that highly subradiant states, so-called lattice dark states, can be individually addressed an... | photon control and coherent interactions via lattice dark states in atomic arrays |
precision spectroscopy of atomic systems1 is an invaluable tool for the study of fundamental interactions and symmetries2. recently, highly charged ions have been proposed to enable sensitive tests of physics beyond the standard model2-5 and the realization of high-accuracy atomic clocks3,5, owing to their high sensiti... | coherent laser spectroscopy of highly charged ions using quantum logic |
vibrational strong coupling (vsc) between molecular vibrations and microcavity photons yields a few polaritons (light-matter modes) and many dark modes (with negligible photonic character). although vsc is reported to alter thermally activated chemical reactions, its mechanisms remain opaque. to elucidate this problem,... | cavity-enabled enhancement of ultrafast intramolecular vibrational redistribution over pseudorotation |
most of the inflationary scenarios that try to explain the origin of primordial black holes (pbhs) from the enhancements of the power spectrum to values of order one, at the relevant scales, run into clashes with the effective field theory (eft) criteria or fail to enhance the power spectrum to such large amplitudes. i... | eft compatible pbhs: effective spawning of the seeds for primordial black holes during inflation |
the idea of stable, localized bundles of energy has strong appeal as a model for particles. in the 1950s, john wheeler envisioned such bundles as smooth configurations of electromagnetic energy that he called geons, but none were found. instead, particle-like solutions were found in the late 1960s with the addition of ... | dynamical boson stars |
the origin of the extragalactic γ-ray background (egb) has been debated for some time. the egb comprises the γ-ray emission from resolved and unresolved extragalactic sources, such as blazars, star-forming galaxies, and radio galaxies, as well as radiation from truly diffuse processes. this letter focuses on the blazar... | the origin of the extragalactic gamma-ray background and implications for dark matter annihilation |
the kmos redshift one spectroscopic survey (kross) is an eso-guaranteed time survey of 795 typical star-forming galaxies in the redshift range z = 0.8-1.0 with the kmos instrument on the very large telescope. in this paper, we present resolved kinematics and star formation rates for 584 z ∼ 1 galaxies. this constitutes... | the kmos redshift one spectroscopic survey (kross): dynamical properties, gas and dark matter fractions of typical z ∼ 1 star-forming galaxies |
we present results on qcd with four dynamical flavors in the temperature range 150 mev ≲t ≲500 mev . we have performed lattice simulations with wilson fermions at maximal twist and measured polyakov loop, chiral condensate and disconnected susceptibility, on lattices with spacings as fine as 0.065 fm. for most observab... | chiral observables and topology in hot qcd with two families of quarks |
the origins of most stellar streams in the milky way are unknown. with improved proper motions provided by gaia edr3, we show that the orbits of 23 galactic stellar streams are highly clustered in orbital phase space. based on their energies and angular momenta, most streams in our sample can plausibly be associated wi... | orbital clustering identifies the origins of galactic stellar streams |
mergers and the spin of the dark matter halo are factors traditionally believed to determine the morphology of galaxies within a λ cold dark matter (λcdm) cosmology. we study this hypothesis by considering approximately 18 000 central galaxies at z = 0 with stellar masses m* = 109-1012 m⊙ selected from the illustris co... | the role of mergers and halo spin in shaping galaxy morphology |
gravitational atoms produced from the superradiant extraction of rotational energy of spinning black holes can reach energy densities significantly higher than that of dark matter, turning black holes into powerful potential detectors for ultralight bosons. these structures are formed by coherently oscillating bosons, ... | photon ring astrometry for superradiant clouds |
we use n-body simulations to study the evolution of cuspy cold dark matter (cdm) haloes in the gravitational potential of a massive host. tidal mass-losses reshape cdm haloes, leaving behind bound remnants whose characteristic densities are set by the mean density of the host at the pericentre of their respective orbit... | the asymptotic tidal remnants of cold dark matter subhaloes |
once only accessible in nearby galaxies, we can now study individual stars across much of the observable universe aided by galaxy-cluster gravitational lenses. when a star, compact object, or multiple such objects in the foreground galaxy-cluster lens become aligned, they can magnify a background individual star, and t... | flashlights: more than a dozen high-significance microlensing events of extremely magnified stars in galaxies at redshifts z=0.7-1.5 |
the focus on the dark matter search has expanded to include low-mass particles such as axions or axionlike particles, and novel theoretical schemes extending the phenomenological landscape, within qcd and beyond, also garnered additional interest in recent decades. assuming dark matter is composed of axions, in the pre... | search for dark matter with an l c circuit |
the migdal effect predicts that a nuclear recoil interaction can be accompanied by atomic ionization, allowing many dark matter direct detection experiments to gain sensitivity to sub-gev masses. we report the first direct search for the migdal effect for m- and l-shell electrons in liquid xenon using 7.0$\pm$1.6 kev n... | search for the migdal effect in liquid xenon with kev-level nuclear recoils |
an m-class mission proposal in response to the 2021 call in esa's science programme with a broad range of objectives in fundamental physics, which include testing the equivalence principle and lorentz invariance, searching for ultralight dark matter and probing quantum mechanics. | ste-quest: space time explorer and quantum equivalence principle space test |
we update cosmological constraints on two decaying dark matter models in light of boss-dr12 data analyzed under the effective field theory of large-scale structures (eftoflss) formalism, together with planck, pantheon and other boss measurements of the baryonic acoustic oscillation (bao). in the first model, a fraction... | constraining decaying dark matter with boss data and the effective field theory of large-scale structures |
we introduce fastpm, a highly scalable approximated particle mesh (pm) n-body solver, which implements the pm scheme enforcing correct linear displacement (1lpt) evolution via modified kick and drift factors. employing a two-dimensional domain decomposing scheme, fastpm scales extremely well with a very large number of... | fastpm: a new scheme for fast simulations of dark matter and haloes |
due to their proximity, high dark-matter (dm) content, and apparent absence of non-thermal processes, milky way dwarf spheroidal satellite galaxies (dsphs) are excellent targets for the indirect detection of dm. recently, eight new dsph candidates were discovered using the first year of data from the dark energy survey... | search for gamma-ray emission from des dwarf spheroidal galaxy candidates with fermi-lat data |
we report new limits on ultralight scalar dark matter (dm) with dilatonlike couplings to photons that can induce oscillations in the fine-structure constant α . atomic dysprosium exhibits an electronic structure with two nearly degenerate levels whose energy splitting is sensitive to changes in α . spectroscopy data fo... | search for ultralight scalar dark matter with atomic spectroscopy |
dark matter direct detection experiments mostly operate at deep underground laboratories. it is necessary to consider shielding effect of the earth, especially for dark matter particles interacting with a large cross section. we analyzed and simulated the earth shielding effect for dark matter at the china jinping unde... | studies of the earth shielding effect to direct dark matter searches at the china jinping underground laboratory |
the cosmic microwave background (cmb) places stringent constraints on models of dark matter (dm), and on the initial conditions of the universe. the full planck data set is used to test the possibility that some fraction of the dm is composed of ultralight axions (ulas). this represents the first use of cmb lensing to ... | using the full power of the cosmic microwave background to probe axion dark matter |
peik and tamm [europhys. lett. 61, 181 (2003), 10.1209/epl/i2003-00210-x] proposed a nuclear clock based on the isomeric transition between the ground state and the first excited state of thorium-229. this transition was recognized as a potentially sensitive probe of possible temporal variation of the fine-structure co... | sensitivity of 229th nuclear clock transition to variation of the fine-structure constant |
we study the production of right-handed bosons wr and heavy neutrinos n at a future 100 tev high-energy hadron collider in the context of left-right symmetry, including the effects of wl-wr gauge boson mixing. we estimate the collider reach for up to 3 /ab integrated luminosity using a multibinned sensitivity measure. ... | left-right symmetry at an fcc-hh |
nearby dwarf spheroidal galaxies are ideal targets in the search for indirect dark matter (dm) signals. in this work, we analyze muse spectroscopic observations of a sample of five galaxies, composed of both classical and ultra-faint dwarf spheroidals. the goal is to search for radiative decays of axion-like particles ... | robust bounds on alp dark matter from dwarf spheroidal galaxies in the optical muse-faint survey |
predicting signals in experiments to directly detect dark matter (dm) requires a form for the local dm velocity distribution. hitherto, the standard halo model (shm), in which velocities are isotropic and follow a truncated gaussian law, has performed this job. new data, however, suggest that a substantial fraction of ... | refinement of the standard halo model for dark matter searches in light of the gaia sausage |
we report results from 21-cm intensity maps acquired from the parkes radio telescope and cross-correlated with galaxy maps from the 2df galaxy survey. the data span the redshift range 0.057 < z < 0.098 and cover approximately 1300 deg2 over two long fields. cross-correlation is detected at a significance of 5.7 σ... | low-amplitude clustering in low-redshift 21-cm intensity maps cross-correlated with 2df galaxy densities |
we discuss prospects of searching for a dark photon (a‧) which serves as mediator between standard model (sm) particles and light dark matter (ldm) by using the combined results from the na64 experiment at the cern sps running in high-energy electron (na64e) and muon (na64μ) modes. we discuss the most natural values an... | combined search for light dark matter with electron and muon beams at na64 |
the evaporation of primordial black holes with a mass in the 1 gramlesssim mpbhlesssim1000 kg range can lead to the production of dark matter particles of almost any mass in the range 0.1 mevlesssim mdmlesssim 1018 gev with the right relic density at very early times, τlesssim 10-10 s. we calculate, as a function of th... | melanopogenesis: dark matter of (almost) any mass and baryonic matter from the evaporation of primordial black holes weighing a ton (or less) |
little is known about dark matter beyond the fact that it does not interact with the standard model or itself, or else does so incredibly weakly. a natural candidate, given the history of no-go theorems against their interactions, are higher spin fields. here we develop the scenario of higher spin (spin s > 2) dark ... | higher spin dark matter |
in this paper, we investigate the modified symmetric teleparallel gravity or f(q) gravity, where q is the nonmetricity, to study the evolutionary history of the universe by considering the functional form of f(q)=αqn, where α and n are constants. here, we consider the parametrization form of the deceleration parameter ... | parametrization of deceleration parameter in f(q) gravity |
the discovery of the higgs boson opens the door to new physics interacting via the higgs portal, including motivated scenarios relating to baryogenesis, dark matter, and electroweak naturalness. we systematically explore the collider signatures of singlet scalars produced via the higgs portal at the 14 tev lhc and a pr... | the higgs portal above threshold |
we revisit the uncertainties in the calculation of spin-independent scattering matrix elements for the scattering of wimp dark matter particles on nuclear matter. in addition to discussing the uncertainties due to limitations in our knowledge of the nucleonic matrix elements of the light quark scalar densities < n |... | uncertainties in wimp dark matter scattering revisited |
monolayer transition metal dichalcogenides (tmds) undergo substantial changes in the single-particle band structure and excitonic optical response upon the addition of just one layer. as opposed to the single-layer limit, the bandgap of bilayer (bl) tmd semiconductors is indirect which results in reduced photoluminesce... | the role of momentum-dark excitons in the elementary optical response of bilayer wse2 |
follow-up observations at high-angular resolution of bright submillimeter galaxies selected from deep extragalactic surveys have shown that the single-dish sources are comprised of a blend of several galaxies. consequently, number counts derived from low- and high-angular-resolution observations are in tension. this de... | the impact of clustering and angular resolution on far-infrared and millimeter continuum observations |
lepton flavor universality violating b →k ℓℓ and k*ℓℓ decays tentatively observed by lhcb can be explained by leptoquark exchange. we explore a simple model for the b anomalies with a composite leptoquark from new strong dynamics at the tev scale, a confining su(nh c) hypercolor interaction. the new matter fields, fund... | b decay anomalies and dark matter from vectorlike confinement |
the invention of the maser stimulated many revolutionary technologies such as lasers and atomic clocks. despite enormous progress, the realizations of masers are still confined to a limited variety of systems, in particular, the physics of masers remains unexplored in periodically driven (floquet) systems, which are ge... | floquet maser |
the relation between galaxies and dark matter haloes is of vital importance for evaluating theoretical predictions of structure formation and galaxy formation physics. we use hydrodynamic cosmological simulations of the local group to show that the widely used method of abundance matching based on dark matter only simu... | bent by baryons: the low-mass galaxy-halo relation |
low-scale seesaw variants protected by lepton number symmetry provide a natural explanation of the smallness of neutrino masses but, unlike their higher-scale counterparts, with potentially testable phenomenology. the approximate lepton number symmetry arranges the heavy neutrinos in pseudo-dirac pairs, which might be ... | hnl mass degeneracy: implications for low-scale seesaws, lnv at colliders and leptogenesis |
observations of nearby galaxies and galaxy clusters have reported an unexpected x-ray emission line around 3.5 kilo-electron volts (kev). proposals to explain this line include decaying dark matter—in particular, that the decay of sterile neutrinos with a mass around 7 kev could match the available data. if this interp... | the dark matter interpretation of the 3.5-kev line is inconsistent with blank-sky observations |
spin-forbidden intravalley dark exciton in tungsten-based transition metal dichalcogenides (tmdcs), owing to its unique spin texture and long lifetime, has attracted intense research interest. here, we show that we can control the dark exciton electrostatically by dressing it with one free electron or free hole, formin... | direct observation of gate-tunable dark trions in monolayer wse2 |
the scotogenic model extends the standard model with three singlet fermion ni and one inert doublet scalar η to address the common origin of tiny neutrino mass and dark matter. for fermion dark matter n1, a hierarchical yukawa structure ∣y1 e∣≪∣y1 μ∣∼∣y1 τ∣∼o (1 ) is usually favored to satisfy constraints from lepton f... | unraveling the scotogenic model at muon collider |
the recent confirmation by the fermilab-based muon g-2 experiment of the (g − 2)μ anomaly has important implications for allowed particle spectra in softly broken supersymmetry (susy) models with neutralino dark matter (dm). generally, the dm has to be quite light, with the mass up to a few hundred gev, and bino-domina... | gut-constrained supersymmetry and dark matter in light of the new (g − 2)μ determination |
for the first time, we determine the properties of the optimal single-moded, linear, passive search for electromagnetic coupling to axion and hidden-photon dark matter, subject to the standard quantum limit on phase-insensitive amplification. we establish the parameters that must be considered to determine the optimal ... | optimal impedance matching and quantum limits of electromagnetic axion and hidden-photon dark matter searches |
the lhcb collaboration has recently reported on some anomalies in $b\to s$ transitions. in addition to discrepancies with the standard model (sm) predictions in some angular observables and branching ratios, an intriguing hint for lepton universality violation was found. here we propose a simple model that extends the ... | shedding light on the $b\\to s$ anomalies with a dark sector |
we model the accretion of gas onto a population of massive primordial black holes in the milky way and compare the predicted radio and x-ray emission with observational data. we show that, under conservative assumptions on the accretion process, the possibility that o (10 )m⊙ primordial black holes can account for all ... | searching for primordial black holes in the radio and x-ray sky |
dark matter (dm) may be a thermal relic that annihilates into heavier states in the early universe. this forbidden dm framework accommodates a wide range of dm masses from kev to weak scales. an exponential hierarchy between the dm mass and the weak scale follows from the exponential suppression of the thermally averag... | light dark matter from forbidden channels |
a precise measurement of the curvature of the universe is of prime importance for cosmology since it could not only confirm the paradigm of primordial inflation but also help in discriminating between different early-universe scenarios. recent observations, while broadly consistent with a spatially flat standard λ cold... | cosmology intertwined iv: the age of the universe and its curvature |
we propose a scenario to generate flavor violating z' interactions at one-loop level by introducing u (1 )μ -τ gauge symmetry, extra vectorlike quark doublets qa', and a singlet scalar χ . both qa' and χ are charged under u (1 )μ-τ and carry odd dark z2 parity. assuming that χ is the dark matter (dm) of the universe an... | explaining b →k(*)ℓ+ℓ- anomaly by radiatively induced coupling in u (1 )μ -τ gauge symmetry |
cold dark matter with cosmological constant (λcdm) cosmological models with early dark energy (ede) have been proposed to resolve tensions between the hubble constant $h_0=100\, h$ km ṡ-1ṁpc-1 measured locally, giving h ≈ 0.73, and h0 deduced from planck cosmic microwave background (cmb) and other early-universe measur... | clustering and halo abundances in early dark energy cosmological models |
in recent years, dark matter direct detection experiments have spurred interest in the migdal effect, where it is employed to extend their sensitivity to lower dark matter masses. given the lack of observation of the migdal effect, the calculation of the signal is subject to large theoretical uncertainties. it is there... | observing the migdal effect from nuclear recoils of neutral particles with liquid xenon and argon detectors |
in this paper, we adapted the appleby-battye-starobinsky model of f(r) gravity towards describing double cosmological inflation and formation of primordial black holes with masses up to 1019 g in the single-field model. we found that it is possible to get an enhancement of the power spectrum of scalar curvature perturb... | formation of primordial black holes after starobinsky inflation |
primordial black holes (pbhs) provide an exciting prospect for accounting for dark matter. in this paper, we consider inflationary models that incorporate realistic features from high-energy physics—including multiple interacting scalar fields and nonminimal couplings to the spacetime ricci scalar—that could produce pb... | primordial black holes from multifield inflation with nonminimal couplings |
in this letter, we determine the present status of sub-gev thermal dark matter annihilating through standard model mixing, with special emphasis on interactions through the vector portal. within representative simple models, we carry out a complete and precise calculation of the dark matter abundance and of all availab... | analyzing the discovery potential for light dark matter |
we study the effects of black hole dark matter on the dynamical evolution of stars in dwarf galaxies. we find that mass segregation leads to a depletion of stars in the center of dwarf galaxies and the appearance of a ring in the projected stellar surface density profile. using segue 1 as an example we show that curren... | dynamics of dwarf galaxies disfavor stellar-mass black holes as dark matter |
despite the great success of the standard model (sm), there still exist mysteries like the nature of dark matter, the strong c p problems, etc. to solve them, many theories proposed new bosons beyond the sm that can mediate new forces. here, we report the latest results of searching for possible new long-range spin-spi... | new experimental limits on exotic spin-spin-velocity-dependent interactions by using smco5 spin sources |
sterile neutrinos appear in minimal extensions of the standard model of particle physics. if their mass is in the kev regime, they are viable dark matter candidates. one way to search for sterile neutrinos in a laboratory-based experiment is via the analysis of β-decay spectra, where the new neutrino mass eigenstate wo... | a novel detector system for katrin to search for kev-scale sterile neutrinos |
we use mock interferometric h i measurements and a conventional tilted-ring modelling procedure to estimate circular velocity curves of dwarf galaxy discs from the apostle suite of λ cold dark matter cosmological hydrodynamical simulations. the modelling yields a large diversity of rotation curves for an individual gal... | non-circular motions and the diversity of dwarf galaxy rotation curves |
a light fermionic weakly interacting massive particle (wimp) dark matter is investigated by studying its minimal renormalizable model, where it requires a scalar mediator to have an interaction between the wimp and standard model particles. we perform a comprehensive likelihood analysis of the model involving the lates... | light fermionic wimp dark matter with light scalar mediator |
the two higgs doublet model extended with a complex scalar singlet (2hdms) is a well-motivated beyond standard model candidate addressing several open problems of nature. in this work, we focus on the dark matter (dm) phenomenology of the complex scalar singlet where the real part of the complex scalar obtains a vacuum... | dark matter phenomenology in 2hdms in light of the 95 gev excess |
we present the physics program of the belle ii experiment, located on the intensity frontier superkekb $e^+e^-$ collider. belle ii collected its first collisions in 2018, and is expected to operate for the next decade. it is anticipated to collect 50/ab of collision data over its lifetime. this book is the outcome of a... | the belle ii physics book |
high-efficiency lead halide perovskite solar cells (pscs) have been fabricated with α-phase formamidinium lead iodide (fapbi3) stabilized with multiple cations. the alloyed cations greatly affect the bandgap, carrier dynamics, and stability, as well as lattice strain that creates unwanted carrier trap sites. we substit... | impact of strain relaxation on performance of α-formamidinium lead iodide perovskite solar cells |
the remarkable performance of hybrid perovskite photovoltaics is attributed to their long carrier lifetimes and high photoluminescence (pl) efficiencies. high-quality films are associated with slower pl decays, and it has been claimed that grain boundaries have a negligible impact on performance. we used confocal fluor... | impact of microstructure on local carrier lifetime in perovskite solar cells |
rare meson decays are among the most sensitive probes of both heavy and light new physics. among them, new physics searches using kaons benefit from their small total decay widths and the availability of very large datasets. on the other hand, useful complementary information is provided by hyperon decay measurements. ... | new physics searches at kaon and hyperon factories |
new physics has traditionally been expected in the high-pt region at high-energy collider experiments. if new particles are light and weakly coupled, however, this focus may be completely misguided: light particles are typically highly concentrated within a few mrad of the beam line, allowing sensitive searches with sm... | forward search experiment at the lhc |
searches for dark photons provide serendipitous discovery potential for other types of vector particles. we develop a framework for recasting dark photon searches to obtain constraints on more general theories, which includes a data-driven method for determining hadronic decay rates. we demonstrate our approach by deri... | serendipity in dark photon searches |
we consider a simple extension of the standard model (sm) with a vector-like lepton and a local u (1) ' symmetry, motivated by the recent experimental anomalies in the muon g -2 and the w boson mass. the u (1) ' symmetry is spontaneously broken by the vevs of the dark higgs scalar and the second higgs doublet, giving r... | a model of vector-like leptons for the muon g -2 and the w boson mass |
particles beyond the standard model (sm) can generically have lifetimes that are long compared to sm particles at the weak scale. when produced at experiments such as the large hadron collider (lhc) at cern, these long-lived particles (llps) can decay far from the interaction vertex of the primary proton-proton collisi... | searching for long-lived particles beyond the standard model at the large hadron collider |
employing the modified entropy-area relation suggested by tsallis and cirto [1], and the holographic hypothesis, a new holographic dark energy (hde) model is proposed. considering a flat friedmann-robertson-walker (frw) universe in which there is no interaction between the cosmos sectors, the cosmic implications of the... | tsallis holographic dark energy |
belle ii is an experiment operating at the intensity frontier. over the next decades, it will record the decay of billions of bottom mesons, charm hadrons, and tau leptons produced in 10 gev electron-positron collisions at the superkekb high-luminosity collider at kek. these data, collected in low-background and kinema... | snowmass white paper: belle ii physics reach and plans for the next decade and beyond |
we advocate for the construction of a new detector element at the lhcb experiment, designed to search for displaced decays of beyond standard model long-lived particles, taking advantage of a large shielded space in the lhcb cavern that is expected to soon become available. we discuss the general features and putative ... | searching for long-lived particles: a compact detector for exotics at lhcb |
medical x-ray imaging procedures require digital flat detectors operating at low doses to reduce radiation health risks. solution-processed organic-inorganic hybrid perovskites have characteristics that make them good candidates for the photoconductive layer of such sensitive detectors. however, such detectors have not... | printable organometallic perovskite enables large-area, low-dose x-ray imaging |
in the formalism of generalized holographic dark energy (hde), the holographic cut-off is generalized to depend upon lir=lirlp,l˙p,l̈p,⋯,lf,l˙f,⋯,a with lp and lf being the particle horizon and the future horizon, respectively (moreover, a is the scale factor of the universe). based on such formalism, in the present pa... | different faces of generalized holographic dark energy |
high-energy colliders offer a unique sensitivity to dark photons, the mediators of a broken dark u(1) gauge theory that kinetically mixes with the standard model (sm) hypercharge. dark photons can be detected in the exotic decay of the 125 gev higgs boson, h→ zzd→4 ℓ, and in drell-yan events, pp→ zd→ ℓℓ. if the dark u(... | illuminating dark photons with high-energy colliders |
we revisit the twin higgs scenario as a "dark" solution to the little hierarchy problem, identify the structure of a minimal model and its viable parameter space, and analyze its collider implications. in this model, dark naturalness generally leads to hidden valley phenomenology. the twin particles, including the top ... | naturalness in the dark at the lhc |
we describe the outcome of a data challenge conducted as part of the dark machines initiative and the les houches 2019 workshop on physics at tev colliders. the challenged aims at detecting signals of new physics at the lhc using unsupervised machine learning algorithms. first, we propose how an anomaly score could be ... | the dark machines anomaly score challenge: benchmark data and model independent event classification for the large hadron collider |
the holographic cut-off, in the formalism of generalized holographic dark energy (hde), is generalized to depend on lir =lir (lp ,l˙p ,l¨p , ⋯ ,lf ,l˙f , ⋯ , a) , where lp and lf are the particle horizon and future horizon respectively, and a is the scale factor of the universe. based on such formalism, we showed that ... | barrow entropic dark energy: a member of generalized holographic dark energy family |
faser,the forward search experiment,is a proposed experiment dedicated to searching for light, extremely weakly-interacting particles at the lhc. such particles may be produced in the lhc's high-energy collisions and travel long distances through concrete and rock without interacting. they may then decay to visible par... | faser's physics reach for long-lived particles |
the improved results on a direct search for a new x (16.7 mev ) boson that could explain the anomalous excess of e+e- pairs observed in the decays of the excited 8be* nuclei ("berillium or x17 anomaly") are reported. interestingly, new recent results in the nuclear transitions of another nucleus, 4he, seems to support ... | improved limits on a hypothetical x (16.7 ) boson and a dark photon decaying into e+e- pairs |
we present a novel framework that provides an explanation to the long-standing excess of electronlike events in the miniboone experiment at fermilab. we suggest a new dark sector containing a dark neutrino and a dark gauge boson, both with masses between a few tens and a few hundreds of mev. dark neutrinos are produced... | dark neutrino portal to explain miniboone excess |
a new u (1 )x gauge boson x primarily interacting with a dark sector can have renormalizable kinetic mixing with the standard model (sm) u (1 )y gauge boson y . this mixing besides introduces interactions of dark photon and dark sector with sm particles, it also modifies interactions among sm particles. the modified in... | dark photon kinetic mixing effects for the cdf w -mass measurement |
long persistent luminescence (lpl) materials--widely commercialized as `glow-in-the-dark' paints--store excitation energy in excited states that slowly release this energy as light. at present, most lpl materials are based on an inorganic system of strontium aluminium oxide (sral2o4) doped with europium and dysprosium,... | organic long persistent luminescence |
recently, the rényi and tsallis generalized entropies have extensively been used in order to study various cosmological and gravitational setups. here, using a special type of generalized entropy, a generalization of both the rényi and tsallis entropy, together with holographic principle, we build a new model for holog... | generalized entropy formalism and a new holographic dark energy model |
searches are performed for both prompt-like and long-lived dark photons, $a'$, produced in proton-proton collisions at a center-of-mass energy of 13 tev. these searches look for $a'\!\to\!\mu^+\mu^-$ decays using a data sample corresponding to an integrated luminosity of 5.5/fb collected with the lhcb detector. neither... | search for $a'\\!\\to\\!\\mu^+\\mu^-$ decays |
recent experimental efforts towards the detection of majorana bound states have focused on creating the conditions for topological superconductivity. here we demonstrate an alternative route, which achieves fully localised zero-energy majorana bound states when a topologically trivial superconductor is strongly coupled... | majorana bound states from exceptional points in non-topological superconductors |
atomically thin two-dimensional crystals have revolutionized materials science. in particular, monolayer transition metal dichalcogenides promise novel optoelectronic applications, owing to their direct energy gaps in the optical range. their electronic and optical properties are dominated by coulomb-bound electron-hol... | resonant internal quantum transitions and femtosecond radiative decay of excitons in monolayer wse2 |
a number of extensions of the standard model predict the existence of new light, weakly coupled particles that couple to the visible sector through higher-dimensional operators containing one or two photons, suppressed by a high new physics scale, and thus have long lifetimes. in this work, we study the prospects for d... | probing some photon portals to new physics at intensity frontier experiments |
the belle ii experiment recently observed the decay $b^+ \to k^+ \nu \nu$ for the first time, with a measured value for the branching ratio of $ (2.3 \pm 0.7) \times 10^{-5}$. this result exhibits a $\sim 3\sigma$ deviation from the standard model (sm) prediction. the observed enhancement with respect to the standard m... | higgs portal interpretation of the belle ii $b^+ \\to k^+ \\nu \\nu$ measurement |
the study of the rare decays $b\to k^{(*)} \nu \bar\nu$ offers a window into the dynamics operating at the electroweak scale, allowing studies of the standard model and searches for heavy new physics. however, the analysis of these decays is also potentially sensitive to the on-shell production of new light bosons $x$ ... | light new physics in $b\\to k^{(*)}\\nu\\bar\\nu$? |
searches are performed for both prompt-like and long-lived dark photons, $a^{\prime}$, produced in proton-proton collisions at a center-of-mass energy of 13 tev, using $a^{\prime}\to\mu^+\mu^-$ decays and a data sample corresponding to an integrated luminosity of 1.6 fb$^{-1}$ collected with the lhcb detector. the prom... | search for dark photons produced in 13 tev $pp$ collisions |
we summarize the ongoing scientific program of the 12 gev continuous electron beam accelerator facility (cebaf) and give an outlook into future opportunities. the program addresses important topics in nuclear, hadronic, and electroweak physics, including nuclear femtography, meson and baryon spectroscopy, quarks and gl... | physics with cebaf at 12 gev and future opportunities |
the forward search experiment (faser) is an approved experiment dedicated to searching for light, extremely weakly interacting particles at the lhc. such particles may be produced in the lhc's high-energy collisions and travel long distances through concrete and rock without interacting. they may then decay to visible ... | faser's physics reach for long-lived particles |
quantum batteries are miniature energy storage devices and play a very important role in quantum thermodynamics. in recent years, quantum batteries have been extensively studied, but limited in theoretical level. here we report the experimental realization of a quantum battery based on superconducting qutrit. our model... | optimal charging of a superconducting quantum battery |
monolayer transition-metal dichalcogenides have recently emerged as possible candidates for valleytronic applications, as the spin and valley pseudospin are directly coupled and stabilized by a large spin splitting. the optical properties of these two-dimensional crystals are dominated by tightly bound electron-hole pa... | trion fine structure and coupled spin-valley dynamics in monolayer tungsten disulfide |
a recent update from miniboone has strengthened the observed 4.8σ excess of e-like events. motivated by this and other notable deviations from standard model predictions, such as the muon (g - 2), we propose a solution to low energy anomalies through a dark neutrino sector. the model is renormalizable and can also expl... | a dark seesaw solution to low energy anomalies: miniboone, the muon (g - 2), and babar |
seven equimolar, five-component, metal diborides were fabricated via high-energy ball milling and spark plasma sintering. six of them, including (hf0.2zr0.2ta0.2nb0.2ti0.2)b2, (hf0.2zr0.2ta0.2mo0.2ti0.2)b2, (hf0.2zr0.2mo0.2nb0.2ti0.2)b2, (hf0.2mo0.2ta0.2nb0.2ti0.2)b2, (mo0.2zr0.2ta0.2nb0.2ti0.2)b2, and (hf0.2zr0.2ta0.2... | high-entropy metal diborides: a new class of high-entropy materials and a new type of ultrahigh temperature ceramics |
recent results at the large hadron collider (lhc) have pointed to enhanced physics capabilities through the improvement of the real-time event processing techniques. machine learning methods are ubiquitous and have proven to be very powerful in lhc physics, and particle physics as a whole. however, exploration of the u... | fast inference of deep neural networks in fpgas for particle physics |
we present a new climate data record for total solar irradiance and solar spectral irradiance between 1610 and the present day with associated wavelength and time-dependent uncertainties and quarterly updates. the data record, which is part of the national oceanic and atmospheric administrationâs (noaa) climate data ... | a solar irradiance climate data record |
in the presence of nonstandard neutrino interactions (nsi), oscillation data are affected by a degeneracy which allows the solar mixing angle to be in the second octant (also known as the dark side) and implies a sign flip of the atmospheric mass-squared difference. this leads to an ambiguity in the determination of th... | coherent enlightenment of the neutrino dark side |
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