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we study the role of the standard model higgs condensate, formed during cosmological inflation, in the epoch of reheating that follows. we focus on the scenario where the inflaton decays slowly and perturbatively, so that there is a long period between the end of inflation and the beginning of radiation domination. the... | achieving the highest temperature during reheating with the higgs condensate |
we explore experimentally a quantum metamaterial based on a superconducting chip with 25 frequency-tunable transmon qubits coupled to a common coplanar resonator. the collective bright and dark modes are probed via the microwave response, i.e., by measuring the transmission amplitude of an external microwave signal. al... | cavity-qed simulation of a quantum metamaterial with tunable disorder |
we study radiative plateaulike inflation and zb l -portal freeze-in fermionic dark matter in a minimal b -l extended model. the u(1 ) b -l higgs, responsible for heavy neutrino masses, also drives inflation in the early universe, thanks to radiative corrections from the heavy neutrinos and the zb l gauge boson. in our ... | ev hubble scale inflation with a radiative plateau: very light inflaton, reheating, and dark matter in b -l extensions |
in the standard model (sm) of particle physics, the branching ratio for higgs boson decays to a final state which is invisible to collider detectors, $h \rightarrow zz^{\star} \rightarrow \nu \bar{\nu} \nu \bar{\nu}$, is order 0.10%. in theories beyond the sm (bsm), this branching ratio can be enhanced by decays to und... | expected sensitivity to invisible higgs boson decays at the ilc with the sid detector (a snowmass white paper) |
weakly-coupled tev-scale particles may mediate the interactions between normal matter and dark matter. if so, the lhc would produce dark matter through these mediators, leading to the familiar "mono- x" search signatures, but the mediators would also produce signals without missing momentum via the same vertices involv... | recommendations of the lhc dark matter working group: comparing lhc searches for dark matter mediators in visible and invisible decay channels and calculations of the thermal relic density |
the radiative decay of neutral fermions has been studied for decades but cp violation induced within such a paradigm has evaded attention. cp violation in these processes can produce an asymmetry between circularly polarised directions of the radiated photons and produces an important source of net circular polarisatio... | cp violation and circular polarisation in neutrino radiative decay |
the dark matter explanation of the 3.5 kev line is strongly disfavored by our work in dessert et al. (2020). boyarsky et al. (2004) questions that conclusion: modeling additional background lines is claimed to weaken the limit sufficiently to re-allow a dark matter interpretation. we respond as follows. (1) a more cons... | response to a comment on dessert et al. "the dark matter interpretation of the 3.5 kev line is inconsistent with blank-sky observations" |
the new minimal supersymmetric standard model (nmssm), a variant of the general next to minimal supersymmetric standard model (nmssm) without z 3 symmetry, features a naturally light singlino with a mass below 75 gev. in light of the new constraints from lhc run-1 on the higgs couplings, sparticles searches and flavour... | status and prospects of the nmssm after lhc run-1 |
we present a feasibility study, to search for dark matter at the lhc, in events with one soft hadronically decaying tau lepton and missing transverse energy recoiling against a hard pt jet from initial state radiation. this methodology allows the search for supersymmetry in compressed mass spectra regions, where the ma... | probing the stau-neutralino coannihilation region at the lhc with a soft tau lepton and a jet from initial state radiation |
we study the propagation of strongly interacting rydberg polaritons through an atomic medium in a one-dimensional optical lattice. we derive an effective single-band hubbard model to describe the dynamics of the dark-state polaritons under realistic assumptions. within this model, we analyze the driven-dissipative tran... | quantum many-body dynamics of driven-dissipative rydberg polaritons |
we argue that the standard model (sm) in the higgs phase does not suffer from a "hierarchy problem" and that similarly the "cosmological constant problem" resolves itself if we understand the sm as a low energy effective theory emerging from a cutoff-medium at the planck scale. we actually take serious veltman's "the i... | the hierarchy problem and the cosmological constant problem revisited |
we investigate the phenomenology of the light charged and neutral scalars in inert doublet model at future e + e - colliders with center of mass energies of 0.5 and 1 tev, and integrated luminosity of 500 fb-1. the analysis covers two production processes, e + e - → h + h - and e + e - → ah, and consists of signal sele... | production of inert scalars at the high energy e + e - colliders |
tensions between cosmological parameters (in particular the local expansion rate h0 and the amplitude of matter clustering s8) inferred from low-redshift data and data from the cosmic microwave background (cmb) and large-scale structure experiments have inspired many extensions to the standard cosmological model, λ cdm... | converting dark matter to dark radiation does not solve cosmological tensions |
we show that the decay of the inflaton field may be incomplete, while nevertheless successfully reheating the universe and leaving a stable remnant that accounts for the present dark matter abundance. we note, in particular, that since the mass of the inflaton decay products is field dependent, one can construct models... | inflaton dark matter from incomplete decay |
we review results from qcd axion string and domain wall simulations and propagate the associated uncertainties, including qcd uncertainties, into the calculation of the axion relic density. we compare two different sets of studies and, using cosmological constraints, perform statistical inference on the axion mass wind... | statistical uncertainties of the ndw = 1 qcd axion mass window from topological defects |
the cryogenic rare event search with superconducting thermometers (cresst) experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating cawo$$_4$$ 4 target crystal. the cawo$$_4$$ 4 crystal is operated together with a light detector at mk temperature and re... | improving the quality of cawo4 target crystals for cresst |
the nature of neutrinos, whether dirac or majorana, is hitherto not known. assuming that the neutrinos are dirac, which needs b -l to be an exact symmetry, we make an attempt to explain the observed proportionality between the relic densities of dark matter (dm) and baryonic matter in the present universe i.e., ωdm≈5 ω... | asymmetric self-interacting dark matter via dirac leptogenesis |
in this work we analyse the ultimate sensitivity of dark matter direct detection experiments to dark radiation in form of sm or semi-sterile neutrinos. this flux-component is assumed to be produced from dark matter decay. since dark radiation may mimic dark matter signals, we perform our analysis based on likelihood st... | sensitivity of direct detection experiments to neutrino dark radiation from dark matter decay and a modified neutrino-floor |
we present a first calculation of the rate for plasmon production in semiconductors from nuclei recoiling against dark matter. the process is analogous to bremsstrahlung of transverse photon modes, but with a longitudinal plasmon mode emitted instead. for dark matter in the 10 mev—1 gev mass range, we find that the pla... | plasmon production from dark matter scattering |
one of the most significant and practical figures of merit in axion haloscope searches is the scanning rate, because of the unknown axion mass. under the best experimental parameters, the only way to improve the figure of merit is to increase the experimentally designed signal to noise ratio in the axion haloscope sear... | improved axion haloscope search analysis |
global fit studies performed in the pmssm and the photon excess signal originating from the galactic center seem to suggest compressed electroweak supersymmetric spectra with a ∼100 gev bino-like dark matter particle. we find that these scenarios are not probed by traditional electroweak supersymmetry searches at the l... | the case for 100 gev bino dark matter: a dedicated lhc tri-lepton search |
we investigate predictions of the trilinear higgs self-coupling with radiative corrections in the context of the inert doublet model. the triple higgs vertex is computed at the one-loop level based on the on-shell renormalization scheme. we calculate its possible deviation from the predictions within the standard model... | revisiting one-loop corrections to the trilinear higgs boson self-coupling in the inert doublet model |
searches for axionlike particles (alps) are motivated by the strong c p problem in particle physics and by unexplained dark matter in astrophysics. in this paper, we discuss novel alp searches using monoenergetic nuclear deexcitation photons from a beam dump, using the isotope decay-at-rest (isodar) experiment as an ex... | axionlike particle production at beam dump experiments with distinct nuclear excitation lines |
the scintillation characteristics of a thallium-doped sodium iodide (nai(tl)) crystal with dimensions of 0.6 cm× 0.6 cm× 2 cm were studied by attaching a silicon photomultiplier (sipm) directly to the crystal over a temperature range of 93-300 k. the scintillation light output and decay time were measured by irradiatin... | scintillation characteristics of a nai(tl) crystal at low-temperature with silicon photomultiplier |
the singlet majoron model of seesaw neutrino mass is appended by one dark majorana fermion singlet χ with l =2 and one dark complex scalar singlet ζ with l =1 . this simple setup allows χ to obtain a small radiative mass anchored by the same heavy right-handed neutrinos, whereas the one-loop decay of the standard model... | radiative seesaw dark matter |
the rest-for-physics (rare event searches toolkit for physics) framework is a root-based solution providing the means to process and analyze experimental or monte carlo event data. special care has been taken to the traceability of the code and the validation of the results produced within the framework, together with ... | rest-for-physics, a root-based framework for event oriented data analysis and combined monte carlo response |
we study dark matter freeze-in scenarios where the mass of the mediator particle that couples dark matter to the standard model is larger than the reheat temperature, trh, in the early universe. in such setups, the standard approach is to work with an effective field theory (eft) where the mediator is integrated out. w... | dark matter freeze-in with a heavy mediator: beyond the eft approach |
if the dark matter in the universe is made of $\mu$ev axion-like particles (alps), then a rich phenomenology can emerge in connection to their stimulated decay into two photons. we discuss the alp stimulated decay induced by astrophysical beams of galactic radio sources. three signatures, made by two echoes and one col... | anatomy of astrophysical echoes from axion dark matter |
several extensions of the standard model predict the production of dark matter particles at the lhc. an uncharted signature of dark matter particles produced in association with v v =w±w∓ or z z pairs from a decay of a dark higgs boson s is searched for using 139 fb-1 of p p collisions recorded by the atlas detector at... | search for dark matter produced in association with a dark higgs boson decaying into w±w∓ or z z in fully hadronic final states from √{s }=13 tev p p collisions recorded with the atlas detector |
initial conditions for (newtonian) cosmological n-body simulations are usually set by re-scaling the present-day power spectrum obtained from linear (relativistic) boltzmann codes to the desired initial redshift of the simulation. this back-scaling method can account for the effect of inhomogeneous residual thermal rad... | relativistic initial conditions for n-body simulations |
the extension of the standard model by a real gauge singlet scalar is the simplest but the most studied model with sometimes controversial ideas on the ability of the model to address the dark matter and the electroweak phase transition issues simultaneously. for this model, we obtain analytically slightly different co... | strongly first-order phase transition in real singlet scalar dark matter model |
we propose a new scenario of early dark energy (ede) with a dark higgs field trapped at the origin. to keep this dark higgs trapped until around the matter-radiation equality, we use dark photons produced nonthermally by coherent oscillations of axions, which have a much stronger trapping effect than thermal mass. when... | early dark energy by a dark higgs field and axion-induced nonthermal trapping |
the observation of light super-partners from a supersymmetric extension to the standard model is an intensely sought-after experimental outcome, providing an explanation for the stabilization of the electroweak scale and indicating the existence of new particles which could be consistent with dark matter phenomenology.... | sparticles in motion - getting to the line in compressed scenarios with the recursive jigsaw reconstruction |
the padme experiment, at the laboratori nazionali di frascati (lnf), in italy, will search for invisible decays of the hypothetical dark photon via the process e+e- → γa‧, where the a‧ escapes detection. the dark photon mass range sensitivity in a first phase will be 1 to 24 mev. we report here on performance measureme... | characterization and performance of padme's cherenkov-based small-angle calorimeter |
we propose a possible string embedding of affleck-dine baryogenesis in type iib sequestered models where the late-time decay of the lightest modulus reheats the universe to relatively low temperatures. we show that if inflation is driven by a blow-up kähler modulus, the affleck-dine field can become tachyonic during in... | affleck-dine baryogenesis in type iib string models |
we propose a new nonthermal mechanism of dark matter production based on vacuum misalignment. a global x -charge asymmetry is generated at high temperatures, under which both the will-be higgs boson and the dark matter are charged. at lower energies, the vacuum changes alignment and breaks the u (1 )x, leading to the e... | higgs boson emerging from the dark |
i review a string-inspired cosmological model with gravitational anomalies in its early epochs, which is based on fields from the (bosonic) massless gravitational multiplet of strings, in particular gravitons and kalb ramond (kr), string-model independent, axions (the dilaton is assumed constant). i show how condensati... | gravitational anomalies, axions and a string-inspired running vacuum model in cosmology |
since its discovery, the environmental instability of exfoliated black phosphorus (2d bp) has emerged as a challenge that hampers its wide application in chemistry, physics, and materials science. many studies have been carried out to overcome this drawback. here we show a relevant enhancement of ambient stability in f... | enhanced ambient stability of exfoliated black phosphorus by passivation with nickel nanoparticles |
the 11be neutron halo nucleus appears to decay into 10be with a rate that exceeds expectations. neutron disappearance into dark matter, beta decay of a halo neutron, or beta-delayed proton decay have been offered as explanations. in this work we study the latter option; we carry out shell model calculations and sequent... | assessment of the beta-delayed proton decay rate of 11be |
despite evidence for the existence of dark matter (dm) from very high and low redshifts, a moderate amount of dm particle decay remains a valid possibility. this includes both models with very long-lived yet unstable particles or mixed scenarios where only a small fraction of dark matter is allowed to decay. in this pa... | decaying dark matter: simulations and weak-lensing forecast |
by quenching the interatomic interactions, we investigate the nonequilibrium dynamics of two-dimensional bose-einstein condensates in boxlike traps with power-law potential boundaries. we show that ring dark solitons can be excited during the quench dynamics for both concave and convex potentials. the quench's modulati... | quench dynamics of bose-einstein condensates in boxlike traps |
several extensions of the standard model predict the production of dark matter particles at the lhc. a search for dark matter particles produced in association with a dark higgs boson decaying into $w^{+}w^{-}$ in the $\ell^\pm\nu q \bar q'$ final states with $\ell=e,\mu$ is presented. this analysis uses 139 fb$^{-1}$ ... | search for dark matter produced in association with a dark higgs boson decaying into $w^{+}w^{-}$ in the one-lepton final state at $\\sqrt{s}$=13 tev using 139 fb$^{-1}$ of $pp$ collisions recorded with the atlas detector |
recent proposals have suggested that a previously unknown decay mode of the neutron into a dark matter particle could solve the long lasting measurement problem of the neutron decay width. we show that, if the dark particle in neutron decay is the major component of the dark matter in the universe, this proposal is in ... | neutron to dark matter decay in neutron stars |
it was recently proposed that the disagreement in the experimental measurements of the lifetime of the neutron might be eradicated if the neutron decays to particles responsible for the dark matter in the universe. in this paper we construct a prototype self-interacting dark matter model which, apart from reproducing t... | small-scale structure from neutron dark decay |
a search is presented for dark matter in proton-proton collisions at a center-of-mass energy of $\sqrt{s} =$ 13 tev using events with at least one high transverse momentum ($p_\mathrm{t}$) muon, at least one high-$p_\mathrm{t}$ jet, and large missing transverse momentum. the data were collected with the cms detector at... | search for dark matter in events with a leptoquark and missing transverse momentum in proton-proton collisions at 13 tev |
a number of proposals have been put forward for detecting axion dark matter (dm) with grand unification scale decay constants that rely on the conversion of coherent dm axions to oscillating magnetic fields in the presence of static, laboratory magnetic fields. crucially, such experiments—including abracadabra—have to ... | lumped-element axion dark matter detection beyond the magnetoquasistatic limit |
a search for dark matter particles is performed by looking for events with large transverse momentum imbalance and a recoiling higgs boson decaying to either a pair of photons or a pair of τ leptons. the search is based on proton-proton collision data at a center-of-mass energy of 13 tev collected at the cern lhc in 20... | search for dark matter produced in association with a higgs boson decaying to γγ or τ + τ - at √{s}=13 tev |
we have searched for axion-like resonance states by colliding optical photons in a focused laser field (creation beam) by adding another laser field (inducing beam) for stimulation of the resonance decays, where frequency-converted signal photons can be created as a result of stimulated photon-photon scattering via exc... | search for sub-ev axion-like resonance states via stimulated quasi-parallel laser collisions with the parameterization including fully asymmetric collisional geometry |
an axion-like particle (alp) with mass mϕ ∼ 10-15 ev oscillates with frequency ∼1 hz. this mass scale lies in an open window of astrophysical constraints, and appears naturally as a consequence of grand unification (gut) in string/m-theory. however, with a gut-scale decay constant such an alp overcloses the universe, a... | opening the 1 hz axion window |
in this master's thesis we study the production of axion dark matter through the so-called misalignment mechanism by considering that during that time, the universe was dominated by a new kind of fluid, different than radiation. we perform a very detailed analysis of the oscillation temperature and the relic density to... | relic density of axion dark matter in standard and non-standard cosmological scenarios |
we show that string moduli have axionphilic nature owing to the model-insensitive derivative interactions arising from the kähler potential. the decay of a modulus into stringy axions occurs without suppression by the mass of final states. interestingly, it turns out to hold in general not only for the scalar partner o... | axionphilic cosmological moduli |
we propose a new alternative to the weakly interacting massive particle paradigm for dark matter. rather than being determined by thermal freeze-out, the dark matter abundance in this scenario is set by dark matter decay, which is allowed for a limited amount of time just before the electroweak phase transition. more s... | dark matter decay between phase transitions at the weak scale |
a new mechanism for producing axion dark matter is proposed. by invoking low-scale inflation and a kinetic mixing between the axion and the inflaton, it is shown that the axion is driven to a field point slightly displaced from the potential minimum, which can give rise to the observed dark matter abundance. in this fr... | inflaxion dark matter |
in order to address the baryon asymmetry in the universe one needs to understand the origin of baryon and lepton number violation. in this article, we discuss the mechanism of baryogenesis via leptogenesis to explain the matter-antimatter asymmetry in theories with spontaneous breaking of baryon and lepton number. in t... | baryogenesis via leptogenesis: spontaneous b and l violation |
we present measurements of bulk radiocontaminants in the high-resistivity silicon ccds from the damic experiment at snolab. we utilize the exquisite spatial resolution of ccds to discriminate between α and β decays, and to search with high efficiency for the spatially-correlated decays of various radioisotope sequences... | measurement of the bulk radioactive contamination of detector-grade silicon with damic at snolab |
higgs signatures from the cascade decays of light top squarks are an interesting possibility in the next-to-minimal supersymmetric standard model (nmssm). we investigate the potential reach of the light top-squark mass at the 13 tev run of the lhc by means of five nmssm benchmark points where this signature is dominant... | probing the nmssm via higgs boson signatures from stop cascade decays at the lhc |
we reconsider the minimal su(5) grand unified theory (gut) in the context of no-scale supergravity inspired by string compactification scenarios, assuming that the soft supersymmetry-breaking parameters satisfy universality conditions at some input scale m_in above the gut scale m_{gut}. when setting up such a no-scale... | no-scale su(5) super-guts |
it has recently been pointed out that the underlying symmetry of dark matter may well be $u(1)_\chi$ (coming from $so(10) \to su(5) \times u(1)_\chi$) with the dark parity of any given particle determined by $(-1)^{q_\chi+2j}$, where $q_\chi$ is its $u(1)_\chi$ charge and $j$ its spin angular momentum. armed with this ... | u(1)_{\\chi}, seesaw dark matter, and higgs decay |
we present a minimal framework of $u(1)_{b-l}$ gauge extension of the standard model explaining dark matter abundance and matter-antimatter asymmetry simultaneously through an attractive mechanism of tev scale wimpy leptogenesis, testable at the current and next generation of colliders. this framework can also explain ... | a minimal model of tev scale wimpy leptogenesis |
we propose a new mechanism where asymmetric dark matter (adm) and the baryon asymmetry are both generated in the same decay chain of a metastable weakly interacting massive particle (wimp) after its thermal freezeout. dark matter and baryons are connected by a generalized baryon number that is conserved, while the dm a... | wimp cogenesis for asymmetric dark matter and the baryon asymmetry |
suppose that the early universe starts with a cosmological $\lambda$-term originating from quantum spacetime at the planck scale. dark energy drives inflation and reheating by reducing its value for massive particle-antiparticle pairs production and oscillation, resulting in a holographic and massive pair plasma state.... | massive particle pair production and oscillation in friedman universe: reheating energy and entropy, and cold dark matter |
we revisit a cosmological constraint on dark matter decaying into dark radiation at late times. in enqvist et al. (2015), we mainly focused on the effects of decaying dark matter (ddm) on the cosmic microwave background (cmb) and nonlinear matter power spectrum. extending our previous analysis, here we use n-body simul... | constraints on decaying dark matter from weak lensing and cluster counts |
we constrain the parameters of a representative new physics model with possible dark matter (dm) signature from a global ckm fit analysis. the model has neutral quark current interactions mediated by a scalar, impacting the semileptonic and purely leptonic meson decays at one-loop. we take this opportunity to update th... | constraining new physics with possible dark matter signatures from a global ckm fit |
if the peccei-quinn symmetry is already broken during inflation, the decay constant fa of the axion can be in a wide region from 1011gev to 1018gev for the axion being the dominant dark matter. in this case, however, the axion causes the serious cosmological problem, isocurvature perturbation problem, which severely co... | cosmologically allowed regions for the axion decay constant fa |
we show that a couplet, a pair of closely spaced photon lines, in the x-ray spectrum is a distinctive feature of lepton flavored dark matter models for which the mass spectrum is dictated by minimal flavor violation. in such a scenario, mass splittings between different dark matter flavors are determined by standard mo... | a couplet from flavored dark matter |
we perform numerical calculations of masses and decay constants of the lightest (flavoured) pseudoscalar, vector and axial vector mesons in the $sp(4)$ lattice gauge theory with three dirac fermions in the antisymmetric representation. the corresponding continuum theory plays an important role in certain ultra-violet c... | spectroscopy of sp(4) lattice gauge theory with n_f=3 antisymmetric fermions |
zinc tungstate (znwo4) crystal scintillators are promising detection material for the experiments searching for double beta decay, dark matter, and investigating rare alpha decays. an extended r&d was performed to develop advanced quality znwo4 crystal scintillators. the r&d programme included the selection of ... | optical, luminescence, and scintillation properties of advanced znwo4 crystal scintillators |
we study how supersonic streaming velocities of baryons relative to dark matter-a large-scale effect imprinted at recombination and coherent over ~3 mpc scales-affect the formation of dwarf galaxies at z ≳ 5. we perform cosmological hydrodynamic simulations, including and excluding streaming velocities, in regions cent... | dwarf galaxy formation with and without dark matter-baryon streaming velocities |
a search for long-lived particles decaying into muon pairs is performed using proton-proton collisions at a center-of-mass energy of 13 tev, collected by the cms experiment at the lhc in 2017 and 2018, corresponding to an integrated luminosity of 101 fb-1. the data sets used in this search were collected with a dedicat... | search for long-lived particles decaying into muon pairs in proton-proton collisions at √{s } = 13 tev collected with a dedicated high-rate data stream |
we investigate multi-lepton signals produced by electroweakino (ewino) decays in the mssm and the tmssm scenarios with sfermions, gluinos and non standard model higgses at the tev scale, with dark matter due to electroweak-scale binos. we recast the present lhc constraints on ewinos for these models and we find that wi... | confronting susy models with lhc data via electroweakino production |
the singularity theorems of the 1960s showed that lemaître's initial symmetry assumptions were not essential for deriving a big-bang origin for a vast multitude of relativistic universe models. yet the actual universe accords remarkably closely with models of lemaître's type. this is a mystery closely related to the fo... | the big bang and its dark-matter content: whence, whither, and wherefore |
we investigate the einstein vacuum equations as well as the einstein-null fluid equations describing neutrino radiation. we find new structures in gravitational waves and memory for asymptotically-flat spacetimes of slow decay. these structures do not arise in spacetimes resulting from data that is stationary outside a... | new structures in gravitational radiation |
the experiment cresst-ii aims at the detection of dark matter with scintillating cawo4 crystals operated as cryogenic detectors. recent results on spin-independent wimp-nucleon scattering from the cresst-ii phase 2 allowed to probe a new region of parameter space for wimp masses below 3 gev/c2. this sensitivity was ach... | beta/gamma and alpha backgrounds in cresst-ii phase 2 |
we investigate a quasi one-dimensional {{}87}\text{rb} bose-einstein condensate in a harmonic trap with an additional dimple trap (dt) in the center. within a zero-temperature gross-pitaevskii mean-field description we provide a one-dimensional physical intuitive model, which we solve by both a time-independent variati... | statics and dynamics of quasi one-dimensional bose-einstein condensate in harmonic and dimple trap |
search for compressed supersymmetry at multi-tev scale, in the presence of a light gravitino dark matter, can get sizable uplift while looking into the associated fat- jets with missing transverse momenta as a signature of the boson produced in the decay process of much heavier next-to-lightest sparticle. we focus on t... | boosted jet techniques for a supersymmetric scenario with gravitino lsp |
we show how to produce antideuteron, antihelium, and other antinuclei in large fractions from the decays of a new particle ϕ that carries baryon number. close to threshold, the production of nuclear bound states is preferred over the decay into individual nucleons, effectively decoupling antinuclei and antiproton fluxe... | how to produce antinuclei from dark matter |
now 50 years since the existence of the neutron star crust was proposed, we review the current understanding of the nuclear physics of the outer layers of accreting neutron stars. nuclei produced during nuclear burning replace the nascent composition of the neutron star ocean and crust. non-equilibrium nuclear reaction... | nuclear physics of the outer layers of accreting neutron stars |
ages and thermal luminosities of neutron stars, inferred from observations, can be interpreted with the aid of the neutron star cooling theory to gain information on the properties of superdense matter in neutron-star interiors. we present a survey of estimated ages, surface temperatures, and thermal luminosities of mi... | thermal luminosities of cooling neutron stars |
we suggest an extension to isospin asymmetric matter of the quarkyonic model from mclerran and reddy [phys. rev. lett. 122, 122701 (2019), 10.1103/physrevlett.122.122701]. this extension allows us to construct the β equilibrium between quarks, nucleons, and leptons. the concept of quarkyonic matter originates from the ... | quarkyonic stars with isospin-flavor asymmetry |
the observed rapid cooling of the cassiopeia a neutron star can be interpreted as being caused by neutron and proton transitions from normal to superfluid and superconducting states in the stellar core. here we present two new chandra acis-s graded observations of this neutron star and measurements of the neutron star ... | tests of the nuclear equation of state and superfluid and superconducting gaps using the cassiopeia a neutron star |
pairing gaps in neutron matter need to be computed in a wide range of densities to address open questions in neutron-star phenomenology. traditionally, the bardeen-cooper-schrieffer approach has been used to compute gaps from bare nucleon-nucleon interactions. here we incorporate the influence of short- and long-range ... | pairing in high-density neutron matter including short- and long-range correlations |
in the present work we apply non-extensive statistics to obtain equations of state suitable to describe stellar matter and verify its effects on microscopic and macroscopic quantities. two snapshots of the star evolution are considered and the direct urca process is investigated with two different parameter sets. q-val... | non-extensive thermodynamics and neutron star properties |
we study the axion cooling of neutron stars within the dine-fischler-srednicki-zhitnitsky (dfsz) model, which allows for tree-level coupling of electrons to the axion and locks the peccei-quinn charges of fermions via an angle parameter. this extends our previous study [phys. rev. d 93, 065044 (2016), 10.1103/physrevd.... | axion cooling of neutron stars. ii. beyond hadronic axions |
we demonstrate that in the framework of standard general relativity, polytropic spheres with properly fixed polytropic index n and relativistic parameter σ , giving a ratio of the central pressure pc to the central energy density ρc , can contain a region of trapped null geodesics. such trapping polytropes can exist fo... | polytropic spheres containing regions of trapped null geodesics |
a set of unified relativistic mean-field equations of state for hyperonic compact stars recently built in [m. fortin, ad. r. raduta, s. avancini, and c. providência, phys. rev. d 101, 034017 (2020), 10.1103/physrevd.101.034017] is used to study the thermal evolution of nonmagnetized and nonrotating spherically-symmetri... | thermal evolution of relativistic hyperonic compact stars with calibrated equations of state |
quantum metrology exploits quantum correlations to make precise measurements with limited particle numbers. by utilizing inter- and intramode correlations in an optical interferometer, we find a state that combines entanglement and squeezing to give a sevenfold enhancement in the quantum fisher information (qfi)—a metr... | practical quantum metrology with large precision gains in the low-photon-number regime |
the standard cooling scenario in the presence of nucleon superfluidity fits rather well to the observation of the neutron stars. it implies that the stellar cooling arguments could place a stringent constraint on the properties of novel particles. we study in particular the cooling rate induced by dark gauge bosons for... | cooling of young neutron stars and dark gauge bosons |
we conduct a comprehensive survey of the shape parameter space of the nuclear pasta phases in neutron star crusts by conducting three-dimensional hartree-fock +bcs calculations. spaghetti, waffles, lasagna, bicontinuous phases and cylindrical holes occupy local minima in the resulting constant-pressure gibbs energy sur... | glassy quantum nuclear pasta in neutron star crusts |
we perform cooling simulations for isolated neutron stars using recently developed equations of state for their core. the equations of state are obtained from new parametrizations of the fsu2 relativistic mean-field functional that reproduce the properties of nuclear matter and finite nuclei, while fulfilling the restr... | cooling of small and massive hyperonic stars |
x-ray emission from the surface of isolated neutron stars (nss) has been now observed in a variety of sources. the ubiquitous presence of pulsations clearly indicates that thermal photons either come from a limited area, possibly heated by some external mechanism, or from the entire (cooling) surface but with an inhomo... | x-ray emission from isolated neutron stars revisited: 3d magnetothermal simulations |
central compact objects (ccos) are young neutron stars emitting thermal x-rays with bolometric luminosities lx in the range of 1032-1034 erg s-1. gourgouliatos, hollerbach, and igoshev recently suggested that peculiar emission properties of ccos can be explained by tangled magnetic field configurations formed in a stoc... | 3d magnetothermal simulations of tangled crustal magnetic field in central compact objects |
we demonstrate that the existing neutron-star cooling data can be appropriately described within "the nuclear medium cooling scenario" including hyperons under the assumption that different compact-star sources have different masses. we use a stiff equation of state of the relativistic mean-field model mkvorhϕ with had... | cooling of neutron stars in "nuclear medium cooling scenario" with stiff equation of state including hyperons |
the direct urca process of rapid neutrino emission can occur in nonuniform nuclear pasta phases that are expected in the inner crusts of neutron stars. here, the periodic potential for a nucleon in nuclear pasta allows momentum conservation to be satisfied for direct urca reactions. we improve on earlier work by modeli... | fast neutrino cooling of nuclear pasta in neutron stars: molecular dynamics simulations |
we investigate the evolution of the chiral magnetic instability in a protoneutron star and compute the resulting magnetic power and helicity spectra. the instability may act during the early cooling phase of the hot protoneutron star after supernova core collapse, where it can contribute to the buildup of magnetic fiel... | chiral magnetic effect in protoneutron stars and magnetic field spectral evolution |
we present the mass excesses of cr-6459, obtained from recent time-of-flight nuclear mass measurements at the national superconducting cyclotron laboratory at michigan state university. the mass of 64cr is determined for the first time, with an atomic mass excess of -33.48 (44 ) mev. we find a significantly different t... | time-of-flight mass measurements of neutron-rich chromium isotopes up to n =40 and implications for the accreted neutron star crust |
we present mass excesses (me) of neutron-rich isotopes of ar through fe, obtained via time of flight b ρ mass spectrometry at the national superconducting cyclotron laboratory. our new results have significantly reduced systematic uncertainties relative to a prior analysis, enabling the first determination of me for ti... | nuclear mass measurements map the structure of atomic nuclei and accreting neutron stars |
nucleon effective masses are studied in the framework of the brueckner-hartree-fock many-body approach at finite temperature. self-consistent calculations using the argonne v18 interaction including a microscopic three-body force are reported for varying temperature and proton fraction up to several times the nuclear s... | nucleon effective mass in hot dense matter |
axion-like particles are predicted in many physics scenarios beyond the standard model (sm). their interactions with sm particles may arise from the triangle anomaly of the associated global symmetry, along with other sm global and gauge symmetries, including anomalies with the global baryon number and electromagnetic ... | electrobaryonic axion: hair of neutron stars |
we investigate the nuclear symmetry energy and neutron star properties using a bayesian analysis based on constraints from different chiral effective field theory calculations using new energy density functionals that allow for large variations at high densities. constraints at high densities are included from observat... | symmetry energy and neutron star properties constrained by chiral effective field theory calculations |
we study the oscillations of relativistic stars, incorporating key physics associated with internal composition, thermal gradients and crust elasticity. our aim is to develop a formalism which is able to account for the state-of-the-art understanding of the complex physics associated with these systems. as a first step... | seismology of adolescent neutron stars: accounting for thermal effects and crust elasticity |
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