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semimetals are being explored for their unique advantages in low-energy high-speed photodetection, although they suffer from serious drawbacks such as an intrinsically high dark current. in this perspective, we envision the exploitation of topological effects in the photoresponse of these materials as a promising route... | semimetals for high-performance photodetection |
searches for resonances decaying into pairs of jets are performed using proton-proton collision data collected at √{s}=13 tev corresponding to an integrated luminosity of up to 36 fb-1. a low-mass search, for resonances with masses between 0.6 and 1.6 tev, is performed based on events with dijets reconstructed at the t... | search for narrow and broad dijet resonances in proton-proton collisions at √{s}=13 tev and constraints on dark matter mediators and other new particles |
the low-energy, long-lived isomer in 229th, first studied in the 1970s as an exotic feature in nuclear physics, continues to inspire a multidisciplinary community of physicists. it has stimulated innovative ideas and studies that expand the understanding of atomic and nuclear structure of heavy elements and of the inte... | nuclear clocks for testing fundamental physics |
despite decades of attempts to reveal its flaws, the standard model of particle physics (sm) has withstood all experimental tests and its predictions are in excellent agreement with data. since the theory was formulated, experiments have provided little guidance regarding the explanations of phenomena not described by ... | collider searches for long-lived particles beyond the standard model |
pushing forward the understanding of general non-unitary dynamics in controlled quantum platforms has been fueled by the recent discovery of measurement-induced phases and phase transitions. so far, these transitions remained largely elusive, since they are masked in standard quantum mechanical observables due to the r... | revealing measurement-induced phase transitions by pre-selection |
we review scenarios in which the particles that account for the dark matter (dm) in the universe interact only through their couplings with the higgs sector of the theory, the so-called higgs-portal models. in a first step, we use a general and model-independent approach in which the dm particles are singlets with spin... | dark matter through the higgs portal |
we consider the direct detection of dark matter (dm) with polar materials, where single production of optical or acoustic phonons gives an excellent reach to the scattering of sub-mev dm for both scalar and vector mediators. using density functional theory, we calculate the material-specific matrix elements, focusing o... | directional detection of light dark matter with polar materials |
the effects of the electron-phonon interaction on optical excitations can be understood in terms of exciton-phonon coupling and require a careful treatment in low-dimensional materials with strongly bound excitons or strong electron-hole interaction in general. through phonon absorption and emission processes, the opti... | theory of exciton-phonon coupling |
direct-detection experiments for light dark matter are making enormous leaps in reaching previously unexplored model space. several recent proposals rely on collective excitations, where the experimental sensitivity is highly dependent on detailed properties of the target material, well beyond just nucleus mass numbers... | multichannel direct detection of light dark matter: target comparison |
we present a summary of future prospects for direct detection of dark matter within the gev/c2 to tev/c2 mass range. this is paired with a new definition of the neutrino fog in order to better quantify the rate of diminishing returns on sensitivity due to irreducible neutrino backgrounds. a survey of dark matter candid... | snowmass2021 cosmic frontier dark matter direct detection to the neutrino fog |
we present a unified theoretical framework for computing spin-independent direct detection rates via various channels relevant for sub-gev dark matter — nuclear re- coils, electron transitions and single phonon excitations. despite the very different physics involved, in each case the rate factorizes into the particle-... | multi-channel direct detection of light dark matter: theoretical framework |
we present results from an analysis looking for dark matter annihilation in the sun with the icecube neutrino telescope. gravitationally trapped dark matter in the sun's core can annihilate into standard model particles making the sun a source of gev neutrinos. icecube is able to detect neutrinos with energies >100 ... | search for annihilating dark matter in the sun with 3 years of icecube data |
we assess the status of past and future experiments on lepton flavor violating (lfv) muon and tau decays into a light, invisible, axion-like particle (alp), a. we propose a new experimental setup for meg ii, the megii-fwd, with a forward calorimeter placed downstream from the muon stopping target. searching for μ → ea ... | looking forward to lepton-flavor-violating alps |
we study the direct detection prospects for a representative set of simplified models of sub-gev dark matter (dm), accounting for existing terrestrial, astrophysical and cosmological constraints. we focus on dark matter lighter than an mev, where these constraints are most stringent, and find three scenarios with acces... | light dark matter: models and constraints |
colliders, among the most successful tools of particle physics, have revealed much about matter. this review describes how colliders contribute to the search for particle dark matter, focusing on the highest-energy collider currently in operation, the large hadron collider (lhc) at cern. in the absence of hints about t... | dark matter searches at colliders |
we explain the recent diphoton excesses around 750 gev by both atlas and cms as a singlet scalar φ which couples to sm gluon and neutral gauge bosons only through higher-dimensional operators. a natural explanation is that φ is a pseudo-nambu-goldstone boson (pngb) which receives parity violation through anomaly if the... | hidden confining world on the 750 gev diphoton excess |
a search is performed for a new sub-gev vector boson (a') mediated production of dark matter (χ ) in the fixed-target experiment, na64, at the cern sps. the a', called dark photon, can be generated in the reaction e-z →e-z a' of 100 gev electrons dumped against an active target followed by its prompt invisible decay a'... | search for vector mediator of dark matter production in invisible decay mode |
building on the successful experience in operating the darkside-50 detector, the darkside collaboration is going to construct darkside-20k, a direct wimp search detector using a two-phase liquid argon time projection chamber (lar tpc) with an active (fiducial) mass of 23 t (20 t). this paper describes a preliminary des... | darkside-20k: a 20 tonne two-phase lar tpc for direct dark matter detection at lngs |
the photoluminescence (pl) spectrum of transition metal dichalcogenides (tmds) shows a multitude of emission peaks below the bright exciton line and not all of them have been explained yet. here, we study the emission traces of phonon-assisted recombinations of momentum-dark excitons. to this end, we develop a microsco... | phonon-assisted photoluminescence from indirect excitons in monolayers of transition-metal dichalcogenides |
large experimental programmes in the fields of nuclear and particle physics search for evidence of physics beyond that explained by current theories. the observation of the higgs boson completed the set of particles predicted by the standard model, which currently provides the best description of fundamental particles ... | precision measurement of the weak charge of the proton |
semiconductor microcavity polaritons, formed via strong exciton-photon coupling, provide a quantum many-body system on a chip, featuring rich physics phenomena for better photonic technology. however, conventional polariton cavities are bulky, difficult to integrate, and inflexible for mode control, especially for room... | photonic-crystal exciton-polaritons in monolayer semiconductors |
we revisit a class of z' explanations of the anomalies found by the lhcb collaboration in b decays, and show that the scenario is tightly constrained by a combination of constraints: (i) lhc searches for dimuon resonances, (ii) perturbativity of the z' couplings; (iii) the bs mass difference, and (iv) electroweak preci... | z' models for the lhcb and g -2 muon anomalies |
because of their tiny band gaps dirac materials promise to improve the sensitivity for dark matter particles in the sub-mev mass range by many orders of magnitude. we study several candidate materials and calculate the expected rates for dark matter scattering via light and heavy dark photons as well as for dark photon... | dirac materials for sub-mev dark matter detection: new targets and improved formalism |
superconducting nanowires, a mature technology originally developed for quantum sensing, can be used as a target and sensor with which to search for dark matter interactions with electrons. here we report on a 180-hour measurement of a tungsten silicide superconducting nanowire device with a mass of 4.3 nanograms. we u... | new constraints on dark matter from superconducting nanowires |
highly correlated orbitals coupled with phonons in two-dimension are identified for paramagnetic and optically active boron vacancy in hexagonal boron nitride by first principles methods which are responsible for recently observed optically detected magnetic resonance signal. here, we report ab initio analysis of the c... | ab initio theory of the negatively charged boron vacancy qubit in hexagonal boron nitride |
the optical properties of transition metal dichalcogenide monolayers such as the two-dimensional semiconductors mos2 and wse2 are dominated by excitons, coulomb bound electron-hole pairs. the light emission yield depends on whether the electron-hole transitions are optically allowed (bright) or forbidden (dark). by sol... | splitting between bright and dark excitons in transition metal dichalcogenide monolayers |
the ilc technical design report documents the design for the construction of a linear collider which can be operated at energies up to 500 gev. this report summarizes the outcome of a study of possible running scenarios, including a realistic estimate of the real time accumulation of integrated luminosity based on ramp... | ilc operating scenarios |
in the presence of neutrino non-standard interactions (nsi) with matter, the derivation of neutrino parameters from oscillation data must be reconsidered. in particular, along with the standard solution to neutrino oscillation, another solution known as "lma-dark" is compatible with global oscillation data and requires... | testing large non-standard neutrino interactions with arbitrary mediator mass after coherent data |
a number of direct detection experiments are searching for electron excitations created by the scattering of sub-gev dark matter. we present an alternate formulation of dark matter-electron scattering in terms of the dielectric response of a material. for dark matter which couples to electrons, this approach automatica... | dark matter-electron scattering in dielectrics |
the xenon1t experiment has recently announced the observation of an excess in electron recoil events at energy range of 1-7 kev with a 3.5 σ signal significance over the standard model prediction. in this letter we sketch the prospects of explaining such an excess from migdal ionization events with below threshold nucl... | prospects of migdal effect in the explanation of xenon1t electron recoil excess |
a search is presented for narrow resonances decaying to dijet final states in proton-proton collisions at √{ s} = 13tev using data corresponding to an integrated luminosity of 12.9 fb-1. the dijet mass spectrum is well described by a smooth parameterization and no significant evidence for the production of new particle... | search for dijet resonances in proton-proton collisions at √{ s} = 13tev and constraints on dark matter and other models |
physical systems with discrete energy levels are ubiquitous in nature and are fundamental building blocks of quantum technology. realizing controllable artificial atom- and molecule-like systems for light would enable coherent and dynamic control of the frequency, amplitude and phase of photons1-5. in this work, we dem... | electronically programmable photonic molecule |
we use 6 yrs of accurate hyperfine frequency comparison data of the dual rubidium and caesium cold atom fountain fo2 at lne-syrte to search for a massive scalar dark matter candidate. such a scalar field can induce harmonic variations of the fine structure constant, of the mass of fermions, and of the quantum chromodyn... | searching for an oscillating massive scalar field as a dark matter candidate using atomic hyperfine frequency comparisons |
we present a novel dark matter candidate, an elastically decoupling relic, which is a cold thermal relic whose present abundance is determined by the cross section of its elastic scattering on standard model particles. the dark matter candidate is predicted to have a mass ranging from a few to a few hundred mev, and an... | elastically decoupling dark matter |
we consider the possibility of interpreting the recently reported diphoton excess at 750 gev as a spin-two massive particle (such as a kaluza-klein graviton in warped extra-dimensions) which serves as a mediator to dark matter via its gravitational couplings to the dark sector and to the standard model (sm). we model n... | the diphoton resonance as a gravity mediator of dark matter |
this document summarises the proposal of the lhc dark matter working group on how to present lhc results on $s$-channel simplified dark matter models and to compare them to direct (indirect) detection experiments. | recommendations on presenting lhc searches for missing transverse energy signals using simplified $s$-channel models of dark matter |
in quantum optics, it is common to assume that atoms are pointlike objects compared to the wavelength of the electromagnetic field they interact with. however, this dipole approximation is not always valid, e.g., if atoms couple to the field at multiple discrete points. previous work has shown that superconducting qubi... | chiral quantum optics with giant atoms |
we use mastercode to perform a frequentist analysis of the constraints on a phenomenological mssm model with 11 parameters, the pmssm11, including constraints from ∼ 36/fb of lhc data at 13 tev and pico, xenon1t and pandax-ii searches for dark matter scattering, as well as previous accelerator and astrophysical measure... | likelihood analysis of the pmssm11 in light of lhc 13-tev data |
the direct detection of dark matter particles with mass below the gev scale is hampered by soft nuclear recoil energies and finite detector thresholds. for a given maximum relative velocity, the kinematics of elastic dark matter nucleus scattering sets a principal limit on detectability. here, we propose to bypass the ... | probing sub-gev dark matter with conventional detectors |
we developed superconducting nanowire single-photon detectors based on tungsten silicide, which show saturated internal detection efficiency up to a wavelength of 10 μm. these detectors are promising for applications in the mid-infrared requiring sub-nanosecond timing, ultra-high gain stability, low dark counts, and hi... | single-photon detection in the mid-infrared up to 10 μm wavelength using tungsten silicide superconducting nanowire detectors |
monolayer transition metal dichalcogenides (tmds) exhibit a remarkably strong coulomb interaction that manifests in tightly bound excitons. due to the complex electronic band structure exhibiting several spin-split valleys in the conduction and valence band, dark excitonic states can be formed. they are inaccessibly by... | dark excitons in transition metal dichalcogenides |
excitons, coulomb-bound electron-hole pairs, are elementary photo-excitations in semiconductors that can couple to light through radiative relaxation. in contrast, dark excitons (xd) show anti-parallel spin configuration with generally forbidden radiative emission. because of their long lifetimes, these dark excitons a... | radiative control of dark excitons at room temperature by nano-optical antenna-tip purcell effect |
recently, the cdf collaboration reported a new measurement of the w boson mass mw=80.4335 ±0.0094 gev , which shows a ∼7 σ deviation from the standard model prediction 80.3545 ±0.0057 gev obtained by the electroweak (ew) global fit. this deviation can be explained by new physics generating moderate ew oblique parameter... | electroweak dark matter model accounting for the cdf w -mass anomaly |
a future higgs factory will provide improved precision on measurements of higgs couplings beyond those obtained by the lhc, and will enable a broad range of investigations across the fields of fundamental physics, including the mechanism of electroweak symmetry breaking, the origin of the masses and mixing of fundament... | report of the topical group on higgs physics for snowmass 2021: the case for precision higgs physics |
rare kaon decays are excellent probes of light, new weakly coupled particles. if such particles x couple preferentially to muons, they can be produced in k →μ ν x decays. we evaluate the future sensitivity for this process at na62 assuming x decays either invisibly or to dimuons. our main physics target is the paramete... | probing muonphilic force carriers and dark matter at kaon factories |
f( r, t) gravity is an extended theory of gravity in which the gravitational action contains general terms of both the ricci scalar r and the trace of the energy-momentum tensor t. in this way, f( r, t) models are capable of describing a non-minimal coupling between geometry (through terms in r) and matter (through ter... | the simplest non-minimal matter-geometry coupling in the f( r, t) cosmology |
the superconducting nanowire single-photon detector (snspd) is a quantum-limit superconducting optical detector based on the cooper-pair breaking effect by a single photon, which exhibits a higher detection efficiency, lower dark count rate, higher counting rate, and lower timing jitter when compared with those exhibit... | superconducting nanowire single-photon detectors for quantum information |
we point out a potential common origin of the recently observed 750 gev diphoton resonance and a weakly interacting massive particle (wimp) candidate. in a dark qcd sector with an unbroken dark g parity, the diphoton resonance could be a dark g -even pion, while the wimp could be the lightest dark g -odd pion. both par... | 750 gev dark pion: cousin of a dark g -parity odd wimp |
we estimate the maximum direct detection cross section for sub-gev dark matter (dm) scattering off nucleons. for dm masses in the range 10 kev-100 mev, cross sections greater than 10-36−10-30 cm2 seem implausible. we present a dm candidate which realizes this maximum cross section: highly interactive particle relics (h... | maximizing direct detection with highly interactive particle relic dark matter |
excitons with binding energies of a few hundreds of mev control the optical properties of transition metal dichalcogenide monolayers. knowledge of the fine structure of these excitons is therefore essential to understand the optoelectronic properties of these 2d materials. here we measure the exciton fine structure of ... | measurement of the spin-forbidden dark excitons in mos2 and mose2 monolayers |
a search is presented for physics beyond the standard model (sm) using electron or muon pairs with high invariant mass. a data set of proton-proton collisions collected by the cms experiment at the lhc at √{s } = 13 tev from 2016 to 2018 corresponding to a total integrated luminosity of up to 140 fb−1 is analyzed. no s... | search for resonant and nonresonant new phenomena in high-mass dilepton final states at √{s } = 13 tev |
we introduce a numerical package forward experiment sensitivity estimator, or foresee , that can be used to simulate the expected sensitivity reach of experiments placed in the far-forward direction from the proton-proton interaction point. the simulations can be performed for 14 tev collision energy characteristic for... | forward experiment sensitivity estimator for the lhc and future hadron colliders |
this is the snowmass2021 energy frontier (ef) beyond the standard model (bsm) report. it combines the ef topical group reports of ef08 (model-specific explorations), ef09 (more general explorations), and ef10 (dark matter at colliders). the report includes a general introduction to bsm motivations and the comparative p... | report of the topical group on physics beyond the standard model at energy frontier for snowmass 2021 |
this document outlines a set of simplified models for dark matter and its interactions with standard model particles. it is intended to summarize the main characteristics that these simplified models have when applied to dark matter searches at the lhc, and to provide a number of useful expressions for reference. the l... | simplified models for dark matter searches at the lhc |
we propose a framework that addresses the origin of neutrino mass, explains the observed discrepancies in the electron and the muon anomalous magnetic moments (amms) data, and incorporates the dark matter (dm) relic abundance. both the neutrino mass and the lepton amms are generated at one-loop level mediated by a comm... | dark matter assisted lepton anomalous magnetic moments and neutrino masses |
models with non-minimal higgs sectors represent a mainstream direction in theoretical exploration of physics opportunities beyond the standard model. extended scalar sectors help alleviate difficulties of the standard model and lead to a rich spectrum of characteristic collider signatures and astroparticle consequences... | building and testing models with extended higgs sectors |
interaction between light and matter results in new quantum states whose energetics can modify chemical kinetics. in the regime of ensemble vibrational strong coupling (vsc), a macroscopic number n of molecular transitions couple to each resonant cavity mode, yielding two hybrid light-matter (polariton) modes and a res... | resonant catalysis of thermally activated chemical reactions with vibrational polaritons |
we show that the current sensitivities of direct detection experiments have already reached the interesting parameter space of freeze-in dark matter models if the dark sector is in the inelastic dark matter framework and the excited dark matter state is cosmologically stable. using results recently presented by the xen... | direct detection of freeze-in inelastic dark matter |
we study the capabilities of a muon collider experiment to detect disappearing tracks originating when a heavy and electrically charged long-lived particle decays via x+→ y+z0, where x+ and z0 are two almost mass degenerate new states and y+ is a charged standard model particle. the backgrounds induced by the in-flight... | hunting wino and higgsino dark matter at the muon collider with disappearing tracks |
the field of dark matter detection is a highly visible and highly competitive one. in this paper, we propose recommendations for presenting dark matter direct detection results particularly suited for weak-scale dark matter searches, although we believe the spirit of the recommendations can apply more broadly to search... | recommended conventions for reporting results from direct dark matter searches |
dark matter direct detection experiments have limited sensitivity to light dark matter (below a few gev), due to the challenges of lowering energy thresholds for the detection of nuclear recoil to below o (kev ) . while impressive progress has been made on this front, light dark matter remains the least constrained reg... | migdal effect and photon bremsstrahlung in effective field theories of dark matter direct detection and coherent elastic neutrino-nucleus scattering |
we report the results of an experimental search for ultralight axionlike dark matter in the mass range 162-166 nev. the detection scheme of our cosmic axion spin precession experiment is based on a precision measurement of 207pb solid-state nuclear magnetic resonance in a polarized ferroelectric crystal. axionlike dark... | search for axionlike dark matter using solid-state nuclear magnetic resonance |
we study a scotogenic extension of the minimal gauged $l_{\mu}-l_{\tau}$ model, including three right-handed singlet fermions and a scalar doublet all odd under an in-built $z_2$ symmetry to explain the anomalous magnetic moments of the muon, cdf-ii w-mass anomaly, and the 95 gev excess reported by the cms collaboratio... | scotogenic $u(1)_{l_{\\mu}-l_{\\tau}}$ origin of $(g-2)_\\mu$, w-mass anomaly and 95 gev excess |
we show that the lifetime of ultracold ground-state 87rb 133>/sup>cs molecules in an optical trap is limited by fast optical excitation of long-lived two-body collision complexes. we partially suppress this loss mechanism by applying square-wave modulation to the trap intensity, such that the molecules spend 75% ... | loss of ultracold 87rb 133cs molecules via optical excitation of long-lived two-body collision complexes |
we present low-temperature magneto-photoluminescence experiments which demonstrate the brightening of dark excitons by an in-plane magnetic field b applied to monolayers of different semiconducting transition metal dichalcogenides. for wse2 and ws2 monolayers, the dark exciton emission is observed at ∼50 mev below the ... | brightening of dark excitons in monolayers of semiconducting transition metal dichalcogenides |
dark matter elastic scattering off nuclei can result in the excitation and ionization of the recoiling atom through the so-called migdal effect. the energy deposition from the ionization electron adds to the energy deposited by the recoiling nuclear system and allows for the detection of interactions of sub-gev /c2 mas... | search for dark-matter-nucleon interactions via migdal effect with darkside-50 |
single-photon detection is a requisite technique in quantum-optics experiments in both the optical and the microwave domains. however, the energy of microwave quanta are four to five orders of magnitude less than their optical counterpart, making the efficient detection of single microwave photons extremely challenging... | single microwave-photon detector using an artificial λ-type three-level system |
high-energy jets recoiling against missing transverse energy (met) are powerful probes of dark matter at the lhc. searches based on large met signatures require a precise control of the z(ν {\bar{ν }})+ jet background in the signal region. this can be achieved by taking accurate data in control regions dominated by z(ℓ... | precise predictions for v+jets dark matter backgrounds |
xenon dual-phase time projection chambers designed to search for weakly interacting massive particles have so far shown a relative energy resolution which degrades with energy above ∼ 200 kev due to the saturation effects. this has limited their sensitivity in the search for rare events like the neutrinoless double-bet... | energy resolution and linearity of xenon1t in the mev energy range |
the axion is a highly motivated elementary particle that could address two fundamental questions in physics—the strong charge-parity (cp) problem and the dark matter mystery. experimental searches for this hypothetical particle started reaching theoretically interesting sensitivity levels, particularly in the micro–ele... | axion dark matter: how to see it? |
the intricate interplay between optically dark and bright excitons governs the light-matter interaction in transition metal dichalcogenide monolayers. we have performed a detailed investigation of the "spin-forbidden" dark excitons in wse2 monolayers by optical spectroscopy in an out-of-plane magnetic field bz. in agre... | fine structure and lifetime of dark excitons in transition metal dichalcogenide monolayers |
excitons dominate the optical properties of monolayer transition metal dichalcogenides (tmds). besides optically accessible bright exciton states, tmds exhibit also a multitude of optically forbidden dark excitons. here, we show that efficient exciton-phonon scattering couples bright and dark states and gives rise to a... | phonon sidebands in monolayer transition metal dichalcogenides |
we point out that a nonrelativistic approximately 2 gev dark matter (dm) which interacts with visible matter through higher-dimensional rayleigh operators could explain the excess of "electron recoil" events recently observed by the xenon1t collaboration. a dm scattering event results in a few kev photon that on averag... | shining dark matter in xenon1t |
the standard model axion seesaw higgs portal inflation (smash) model is a well-motivated, self-contained description of particle physics that predicts axion dark matter particles to exist within the mass range of 50 to 200 micro–electron volts. scanning these masses requires an axion haloscope to operate under a consta... | direct search for dark matter axions excluding alp cogenesis in the 63- to 67-μev range with the organ experiment |
we present first results and future plans for the oscillating resonant group axion (organ) experiment, a microwave cavity axion haloscope situated in perth, western australia designed to probe for high mass axions motivated by several theoretical models. the first stage focuses around 26.6 ghz in order to directly test... | the organ experiment: an axion haloscope above 15 ghz |
we propose a new scientific application of unsupervised learning techniques to boost our ability to search for new phenomena in data, by detecting discrepancies between two datasets. these could be, for example, a simulated standard-model background, and an observed dataset containing a potential hidden signal of new p... | guiding new physics searches with unsupervised learning |
i give an overview about the features the mathematica package sarah provides to study new models. in general, sarah can handle a wide range of models beyond the mssm coming with additional chiral superfields, extra gauge groups, or distinctive features like dirac gaugino masses. all of these models can be implemented i... | exploring new models in all detail with sarah |
ultralight axion-like particles are well-motivated dark matter candidates, naturally emerging from theories of physics at ultrahigh energies. here we report the results of a direct search for electromagnetic interactions of axion-like dark matter in the mass range that spans three decades from 12 pev to 12 nev. the det... | search for axion-like dark matter with ferromagnets |
the recently improved observation of the fine structure constant has led to a negative 2.4 σ anomaly of electron g -2 . combined with the long-existing positive 4.2 σ discrepancy of the muon anomalous magnetic moment, it is interesting and difficult to explain these two anomalies with a consistent model without introdu... | electron and muon anomalous magnetic moments in the inverse seesaw extended nmssm |
two of the most pressing questions in physics are the microscopic nature of the dark matter that comprises 84% of the mass in the universe and the absence of a neutron electric dipole moment. these questions would be resolved by the existence of a hypothetical particle known as the quantum chromodynamics (qcd) axion. i... | search for low-mass axion dark matter with abracadabra-10 cm |
we investigate the topological properties of nf= 2 + 1 qcd with physical quark masses, both at zero and finite temperature. we adopt stout improved staggered fermions and explore a range of lattice spacings a ∼ 0 .05 - 0 .12 fm. at zero temperature we estimate both finite size and finite cut-off effects, comparing our ... | axion phenomenology and θ-dependence from nf= 2 + 1 lattice qcd |
we investigate inflation within f(r,φ )-theories, where a dynamical scalar field is coupled to gravity. a class of models which can support early-time acceleration with the emerging of an effective cosmological constant at high curvature is studied. the dynamics of the field allow for exit from inflation leading to the... | inflation in f(r,φ )-theories and mimetic gravity scenario |
we present an improved result for the lattice computation of the proton decay matrix elements in nf=2 +1 qcd. in this study, by adopting the error reduction technique of all-mode-averaging, a significant improvement of the statistical accuracy is achieved for the relevant form factor of proton (and also neutron) decay ... | improved lattice computation of proton decay matrix elements |
the results of a search for the direct pair production of top squarks, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, several energetic jets, and missing transverse momentum are reported. the analysis also targets spin-0 mediator models, where the mediator decays into a... | search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb-1 of √{s}=13 tev pp collision data with the atlas detector |
we generalize models invoking a spin-2 particle as a mediator between the dark sector and the standard model. we show that a massive spin-2 messenger can efficiently play the role of a portal between the two sectors. the dark matter is then produced via a freeze-in mechanism during the reheating epoch. in a large part ... | spin-2 portal dark matter |
the major breakthroughs in understanding of topological materials over the past decade were all triggered by the discovery of the z2-type topological insulator—a type of material that is insulating in its interior but allows electron flow on its surface. in three dimensions, a topological insulator is classified as eit... | a weak topological insulator state in quasi-one-dimensional bismuth iodide |
einstein's general theory of relativity from 19151 remains the most successful description of gravitation. from the 1919 solar eclipse2 to the observation of gravitational waves3, the theory has passed many crucial experimental tests. however, the evolving concepts of dark matter and dark energy illustrate that there i... | observation of the effect of gravity on the motion of antimatter |
a recent proposal is that dark matter could be a thermal relic of 3 →2 scatterings in a strongly coupled hidden sector. we present explicit classes of strongly coupled gauge theories that admit this behavior. these are qcd-like theories of dynamical chiral symmetry breaking, where the pions play the role of dark matter... | model for thermal relic dark matter of strongly interacting massive particles |
belle ii has recently reported the new measurement ${\cal b}(b^+\to k^+\nu\bar\nu)=(2.4\pm0.7)\times 10^{-5}$ \cite{belleiitalk2023} which is two times larger than their previous result (although consistent within errors) and about $2.8\,\sigma$ higher than the sm prediction. we re-examine new physics scenarios we have... | revisiting models that enhance $b^+\\to k^+ \\nu\\bar\\nu$ in light of the new belle ii measurement |
the atlas experiment at the lhc has measured the higgs boson couplings and mass, and searched for invisible higgs boson decays, using multiple production and decay channels with up to 4.7 fb$^{-1}$ of $pp$ collision data at $\sqrt{s}=7$ tev and 20.3 fb$^{-1}$ at $\sqrt{s}=8$ tev. in the current study, the measured prod... | constraints on new phenomena via higgs boson couplings and invisible decays with the atlas detector |
the goal of this report is to summarize the current situation and discuss possible search strategies for charged scalars, in non-supersymmetric extensions of the standard model at the lhc. such scalars appear in multi-higgs-doublet models, in particular in the popular two-higgs-doublet model, allowing for charged and a... | prospects for charged higgs searches at the lhc |
understanding collisions between ultracold molecules is crucial for making stable molecular quantum gases and harnessing their rich internal degrees of freedom for quantum engineering. transient complexes can strongly influence collisional physics, but in the ultracold regime, key aspects of their behavior have remaine... | collisions of ultracold molecules in bright and dark optical dipole traps |
the currently accepted mathematical description of the fundamental constituents and interactions of matter is the standard model of particle physics. its last missing particle, the famous higgs boson, was observed at the large hadron collider at cern in 2012. however, it is clear that the standard model cannot be the u... | anomalies in particle physics |
we consider cosmological aspects of the dark dimension (a mesoscopic dimension of micron scale), which has recently been proposed as the unique corner of the quantum gravity landscape consistent with both the swampland criteria and observations. in particular we show how this leads, by the universal coupling of the sta... | dark dimension gravitons as dark matter |
we propose a predictive q4 flavored 2hdm model, where the scalar sector is enlarged by the inclusion of several gauge singlet scalars and the fermion sector by the inclusion of right-handed majorana neutrinos. in our model, the q4 family symmetry is supplemented by several auxiliary cyclic symmetries, whose spontaneous... | fermion masses and mixings, dark matter, leptogenesis and g -2 muon anomaly in an extended 2hdm with inverse seesaw |
coupling dark matter to light new particles is an attractive way to combine thermal production with strong velocity-dependent self-interactions. here we point out that in such models the dark matter annihilation rate is generically enhanced by the sommerfeld effect, and we derive the resulting constraints from the cosm... | strong constraints on self-interacting dark matter with light mediators |
results of a search for new physics in final states with an energetic jet and large missing transverse momentum are reported. the search uses proton-proton collision data corresponding to an integrated luminosity of 139 fb-1 at a center-of-mass energy of 13 tev collected in the period 2015-2018 with the atlas detector ... | search for new phenomena in events with an energetic jet and missing transverse momentum in p p collisions at √{s }=13 tev with the atlas detector |
we study the cdf w-mass, muon g -2 , and dark matter observables in a local u (1) lμ-lτ model in which the new particles include three vector-like leptons (e1,e2,n ), a new gauge boson z', a scalar s (breaking u (1) lμ-lτ ), a scalar dark matter xi and its partner xr. we find that the cdf w-mass disfavors me1=me2=mn or... | the cdf w-mass, muon g -2 , and dark matter in a u (1) lμ-lτ model with vector-like leptons |
as hosts for tightly-bound electron-hole pairs carrying quantized angular momentum, atomically-thin semiconductors of transition metal dichalcogenides (tmdcs) provide an appealing platform for optically addressing the valley degree of freedom. in particular, the valleytronic properties of neutral and charged excitons i... | coulomb-bound four- and five-particle intervalley states in an atomically-thin semiconductor |
in this paper, we study the local observational consequences of a violation of the einstein equivalence principle induced by models of light scalar dark matter (dm). we focus on two different models where the scalar field couples linearly or quadratically to the standard model of matter fields. for both these cases, we... | violation of the equivalence principle from light scalar dark matter |
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