Latest in hep-ex

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Effective-field theory analysis of the $τ^{-}\rightarrow (K π)^{-}ν_τ$ decaysFeb 21 2019We analyze the $\tau^-\to(K\pi)^-\nu_\tau$ decays within an effective field theory description of heavy new physics (NP) modifying the SM left-handed weak charged current and include refined SM input (with controlled uncertainties) for the participant ... More
Report on Tests and Measurements of Hadronic Interaction Properties with Air ShowersFeb 21 2019We present a summary of recent tests and measurements of hadronic interaction properties with air showers. This report has a special focus on muon density measurements. Several experiments reported deviations between simulated and recorded muon densities ... More
Searches for third-generation scalar leptoquarks in $\sqrt{s}$ = 13 TeV pp collisions with the ATLAS detectorFeb 21 2019Limits are set on the pair production of scalar leptoquarks, where all possible decays of the leptoquark into a quark ($t$, $b$) and a lepton ($\tau$, $\nu$) of the third generation are considered. The limits are presented as a function of the leptoquark ... More
Boosted Top quark polarizationFeb 21 2019In top quark production, the polarization of top quarks, decided by the chiral structure of couplings, is likely to be modified in the presence of any new physics contribution to the production. Hence the same is a good discriminator for those new physics ... More
Learning representations of irregular particle-detector geometry with distance-weighted graph networksFeb 21 2019We explore the use of graph networks to deal with irregular-geometry detectors in the context of particle reconstruction. Thanks to their representation-learning capabilities, graph networks can exploit the full detector granularity, while natively managing ... More
On Future High-Energy CollidersFeb 21 2019I outline some of the physics reasons to pursue a future programme in high-energy colliders.
Amplitude analysis of $B^{0}_{s} \rightarrow K^{0}_{\textrm{S}} K^{\pm}π^{\mp}$ decaysFeb 21 2019The first untagged decay-time-integrated amplitude analysis of $B^{0}_{s} \rightarrow K^{0}_{\textrm{S}} K^{\pm}\pi^{\mp}$ decays is performed using a sample corresponding to $3.0\,$fb$^{-1}$ of $pp$ collision data recorded with the LHCb detector during ... More
Single-spin asymmetry in dihadron production in SIDIS off the longitudinally polarized nucleon targetFeb 21 2019We study the single longitudinal-spin asymmetry of dihadron production in semi-inclusive deep inelastic scattering process. We consider the collinear picture in which the transverse momentum of the final-state hadron pair is integrated out, such that ... More
Transverse single spin asymmetry for very forward $π^{0}$ production in polarized proton-proton collisions at $\sqrt{s}$ = 510 GeVFeb 21 2019Transverse single spin asymmetry, $A_{N}$, of very forward $\pi^{0}$ production from polarized $p + p$ collisions provides new information toward an understanding of its production mechanism. $A_{N}$ of forward $\pi^{0}$ in the pseudorapidity region of ... More
Semileptonic and leptonic charm meson decays at Belle IIFeb 21 2019We review measurements of semileptonic and leptonic charm meson decays performed by the Belle experiment, and we use these results to estimate the sensitivity of the follow-on Belle II experiment to these decays.
Probing the Neutrino Mass Ordering with Atmospheric Neutrinos from Three Years of IceCube DeepCore DataFeb 20 2019The Neutrino Mass Ordering (NMO) remains one of the outstanding questions in the field of neutrino physics. One strategy to measure the NMO is to observe matter effects in the oscillation pattern of atmospheric neutrinos above $\sim 1\,\mathrm{GeV}$, ... More
Higgs Parity, Strong CP, and Dark MatterFeb 20 2019An exact spacetime parity replicates the $SU(2) \times U(1)$ electroweak interaction, the Higgs boson $H$, and the matter of the Standard Model. This "Higgs Parity" and the mirror electroweak symmetry are spontaneously broken at scale $v' = \left\langle{H'} ... More
Probing Muonic Forces and Dark Matter at Kaon FactoriesFeb 20 2019Rare kaon decays are excellent probes of light, new weakly-coupled particles. If such particles $X$ couple preferentially to muons, they can be produced in $K\to \mu \nu X$ decays. In this letter we evaluate the future sensitivity for this process at ... More
Neutron Skin in CsI and Low-Energy Effective Weak Mixing Angle from COHERENT DataFeb 20 2019Both the neutron skin thickness $\Delta R_{np}$ of atomic nuclei and the low-energy neutrino-nucleon ($\nu N$) interactions are of fundamental importance in nuclear and particle physics, astrophysics as well as new physics beyond the standard model (SM) ... More
Search for heavy neutrinos with the T2K near detector ND280Feb 20 2019This paper reports on the search for heavy neutrinos with masses in the range $140 < M_N < 493$ MeV/c$^2$ using the off-axis near detector ND280 of the T2K experiment. These particles can be produced from kaon decays in the standard neutrino beam and ... More
Benchmarking a Non-Equilibrium Approach to Photon Emission in Relativistic Heavy-Ion CollisionsFeb 20 2019In this work, the production of photons through binary scattering processes is investigated for equilibrated hadronic systems. More precisely, a non-equilibrium hadronic transport approach to describe relativistic heavy-ion collisions is benchmarked with ... More
Impact of form factor uncertainties on interpretations of coherent elastic neutrino-nucleus scattering dataFeb 20 2019The standard model coherent elastic neutrino-nucleus scattering (CE$\nu$NS) cross section is subject to nuclear form factor uncertainties, mainly driven by the root-mean-square radius of the neutron density distribution. Motivated by COHERENT phases I-III ... More
Conference Summary of QNP2018Feb 20 2019This report is the summary of the Eighth International Conference on Quarks and Nuclear Physics (QNP2018). Hadron and nuclear physics is the field to investigate ultimate high-density quantum many-body systems bound by strong interactions. It is intended ... More
Scanning Strategies at the Top Threshold at ILCFeb 19 2019A scan of the top quark pair production threshold at a future electron-positron collider provides the possibility for high-precision measurements of the top quark mass, and, when using two dimensional fits of the measured cross sections, also of other ... More
Automating the Construction of Jet Observables with Machine LearningFeb 19 2019Machine-learning assisted jet substructure tagging techniques have the potential to significantly improve searches for new particles and Standard Model measurements in hadronic final states. Techniques with simple analytic forms are particularly useful ... More
New paradigm for fluctuations in heavy-ion collisionsFeb 19 2019Since their discovery, fluctuations in the initial state of heavy-ion collisions have been understood as originating mostly from the random positions of nucleons within the colliding nuclei. We consider an alternative approach where all the focus is on ... More
Combinations of single-top-quark production cross-section measurements and $|f_{\rm LV}V_{tb}|$ determinations at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS experimentsFeb 19 2019This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at $\sqrt{s}=7$ and 8 TeV corresponding to integrated luminosities of 1.17 ... More
A Light Calibration System for the ProtoDUNE-DP DetectorFeb 19 2019A LED-based fiber calibration system for the ProtoDUNE-Dual Phase (DP) photon detection system (PDS) has been designed and validated. ProtoDUNE-DP is a 6x6x6 m3 liquid argon time-projection-chamber currently being installed at the Neutrino Platform at ... More
Space-Time Discriminant to Separate Double-Beta Decay from $^8$B Solar Neutrinos in Liquid ScintillatorFeb 19 2019We present a technique for separating double beta-decay from $^8$B solar neutrino interactions in a liquid scintillator detector. The technique uses position and time of photo-electrons (PEs) to separate directional Cherenkov light from isotropic sintillation ... More
Measurement of b-hadron fractions in 13 Tev pp collisionsFeb 18 2019The production fractions of $\overline{B}_s^0$ and $\Lambda_b^0$ hadrons, normalized to the sum of $B^-$ and $\overline{B}^0$ fractions, are measured in 13 TeV pp collisions using data collected by the LHCb experiment, corresponding to an integrated luminosity ... More
Measurement of b-hadron fractions in 13 TeV pp collisionsFeb 18 2019Feb 20 2019The production fractions of $\overline{B}_s^0$ and $\Lambda_b^0$ hadrons, normalized to the sum of $B^-$ and $\overline{B}^0$ fractions, are measured in 13 TeV pp collisions using data collected by the LHCb experiment, corresponding to an integrated luminosity ... More
Ultra-peripheral-collision studies in the fixed-target mode with the proton and lead LHC beamsFeb 18 2019We address the physics case related to the studies of ultra-peripheral pH, pPb, PbH, and PbPb collisions in the fixed-target mode at the LHC. In particular, we discuss how one can measure the gluon generalized parton distribution E_g(x,xi,t) in exclusive ... More
Search for light sterile neutrinos with the T2K far detector Super-Kamiokande at a baseline of 295 kmFeb 18 2019We perform a search for light sterile neutrinos using the data from the T2K far detector at a baseline of 295 km, with an exposure of 14.7 (7.6)$\times 10^{20}$ protons on target in neutrino (antineutrino) mode. A selection of neutral current interaction ... More
Electron-positron annihilation into hadrons at the higher-loop levels: Explicit formFeb 18 2019The paper constitutes the second part of the study of the R-ratio of electron-positron annihilation into hadrons [Eur. Phys. J. C77, 844 (2017)]. Specifically, the explicit expression for the R-ratio, which properly accounts for all the effects due to ... More
Signal of a $\boldsymbol{D\bar D}$ bound state in the $ \boldsymbol{e^+ e^- \to J/ψD\bar D}$ reactionFeb 18 2019We analyze the $D\bar{D}$ mass distribution from a recent Belle experiment on the $e^+e^- \to J/\psi D\bar{D}$ reaction, using a unitary formalism with coupled channels $D^+D^-$, $D^0\bar{D}^0$, $D_s\bar{D}_s$, and $\eta\eta$, with some of the interactions ... More
Signal of a $\boldsymbol{D\bar D}$ bound state in the $ \boldsymbol{e^+ e^- \to J/ψD\bar D}$ reactionFeb 18 2019Feb 19 2019We analyze the $D\bar{D}$ mass distribution from a recent Belle experiment on the $e^+e^- \to J/\psi D\bar{D}$ reaction, using a unitary formalism with coupled channels $D^+D^-$, $D^0\bar{D}^0$, $D_s\bar{D}_s$, and $\eta\eta$, with some of the interactions ... More
Study of the process $e^+e^-\to 3(π^+π^-)π^0$ in the C.M. Energy range 1.6--2.0 GeV with the CMD-3 detectorFeb 18 2019The cross section of the process $e^+e^- \to 3(\pi^+\pi^-)\pi^0$ has been measured for the first time using a data sample of 56.7 pb$^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider. 632$\pm$32 signal events have been selected ... More
Experimental searches for muon decays beyond the Standard ModelFeb 17 2019The study of muon properties and decays played a crucial role in the early years of particle physics and contributed over decades to build and consolidate the Standard Model. At present, searches for muon decays beyond the Standard Model are performed ... More
Sensitivity of the intensity frontier experiments for neutrino and scalar portals: analytic estimatesFeb 17 2019In recent years, a number of intensity-frontier experiments have been proposed to search for feebly interacting particles with a mass in the GeV range. We show analytically how the characteristic shape of the sensitivity regions of such experiments - ... More
Asymmetries of anti-triplet charmed baryon decaysFeb 17 2019We analyze the decay processes of ${\bf B}_c \to {\bf B}_n M$ with the $SU(3)_F$ flavor symmetry and spin-dependent amplitudes, where ${\bf B}_c({\bf B}_n)$ and $M$ are the anti-triplet charmed (octet) baryon and nonet meson states, respectively. In the ... More
IceCube Sterile Neutrino SearchesFeb 17 2019Anomalies in short baseline experiments have been interpreted as evidence for additional neutrino mass states with large mass splittings from the known, active flavors. This explanation mandates a corresponding signature in the muon neutrino disappearance ... More
Tracks of hadronic showers in the CALICE Si-W ECAL physics prototypeFeb 16 2019A detailed investigation of hadronic interactions is performed using $\pi^-$ data with energies in the range 2-10 GeV, recorded at FNAL in 2008, incident on a high granularity silicon-tungsten electromagnetic calorimeter. The region in which primary $\pi^-$ ... More
Search for Extra Scalars Produced in Association with Muon Pairs at the ILCFeb 16 2019We study the search for an extra scalar $S$ boson produced in association with the $Z$ boson at the International Linear Collider (ILC). The study is performed at center-of-mass energies of 250 GeV and 500 GeV based on the full simulation of the International ... More
$b\rightarrow s μ^+ μ^-$ anomalies and related phenomenology in $U(1)_{B_3 - x_μL_μ- x_τL_τ}$ flavor gauge modelsFeb 16 2019We propose a generation dependent lepton/baryon gauge symmetry, $U(1)_{B_3 - x_\mu L_\mu - x_\tau L_\tau} \equiv U(1)_X$ (with $x_\mu + x_\tau =1$ for anomaly cancellation), as a possible solution for the $b \rightarrow s \mu^+ \mu^-$ anomalies. By introducing ... More
Letter of Interest for a Neutrino Beam from Protvino to KM3NeT/ORCAFeb 16 2019The Protvino accelerator facility located in the Moscow region, Russia, is in a good position to offer a rich experimental research program in the field of neutrino physics. Of particular interest is the possibility to direct a neutrino beam from Protvino ... More
Study of the $hγZ$ coupling using $e^+e^-\xrightarrow{}h γ$ at the ILCFeb 16 2019We study the $e^+e^-\to h \gamma$ process at the International Linear Collider (ILC) to probe new physics in the $h\gamma Z$ coupling. The study is performed at a center of mass energy of 250 GeV and is based on the full simulation of the International ... More
Multi-stage jet evolution through QGP using the JETSCAPE framework: inclusive jets, correlations and leading hadronsFeb 15 2019The JETSCAPE Collaboration has recently announced the first release of the JETSCAPE package that provides a modular, flexible, and extensible Monte Carlo event generator. This innovative framework makes it possible to perform a comprehensive study of ... More
Measurement of the four-lepton invariant mass spectrum in 13 TeV proton-proton collisions with the ATLAS detectorFeb 15 2019A measurement of the four-lepton invariant mass spectrum is made with the ATLAS detector, using an integrated luminosity of 36.1 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}$ = 13 TeV delivered by the Large Hadron Collider. The differential cross-section ... More
Dalitz plot analysis of the $D^+\to K^-K^+K^+$ decayFeb 15 2019The resonant structure of the doubly Cabibbo-suppressed decay $D^+ \to K^-K^+K^+$ is studied for the first time. The measurement is based on a sample of pp-collision data, collected at a centre-of-mass energy of 8 TeV with the LHCb detector and corresponding ... More
Dalitz plot analysis of the $D^+\to K^-K^+K^+$ decayFeb 15 2019Feb 18 2019The resonant structure of the doubly Cabibbo-suppressed decay $D^+ \to K^-K^+K^+$ is studied for the first time. The measurement is based on a sample of pp-collision data, collected at a centre-of-mass energy of 8 TeV with the LHCb detector and corresponding ... More
Exploring SMEFT in VH with Machine LearningFeb 15 2019In this paper we study the use of Machine Learning techniques to exploit kinematic information in VH, the production of a Higgs in association with a massive vector boson. We parametrise the effect of new physics in terms of the SMEFT framework. We find ... More
Neutrinos below 100 TeV from the southern sky employing refined veto techniques to IceCube dataFeb 15 2019Many Galactic sources of gamma rays, such as supernova remnants, are expected to produce neutrinos with a typical energy cutoff well below 100 TeV. For the IceCube Neutrino Observatory located at the South Pole, the southern sky, containing the inner ... More
Measurement of $W^{\pm}Z$ production cross sections and gauge boson polarisation in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detectorFeb 15 2019This paper presents measurements of $W^{\pm}Z$ production cross sections in $pp$ collisions at a centre-of-mass energy of 13 TeV. The data were collected in 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider, and correspond to an integrated ... More
A magnetic spectrometer to measure electron bunches accelerated at AWAKEFeb 15 2019A magnetic spectrometer has been developed for the AWAKE experiment at CERN in order to measure the energy distribution of bunches of electrons accelerated in wakefields generated by proton bunches in plasma. AWAKE is a proof-of-principle experiment for ... More
Production of $Z_c(3900$) and $Z_c(4020)$ in $B_c$ decayFeb 15 2019In the present work, we propose to search the charmonium-like states $Z_c(3900$) and $Z_c(4020)$ in the $B_c$ decay. In an effective Lagrangian approach, the branching ratios of $B_c^+ \to Z_c(3900)^+ \pi^0$ and $B_c^+\to Z_c (4020)^+ \pi^0$ are estimated ... More
Revisiting the LHC reach in the displaced region of the minimal left-right symmetric modelFeb 15 2019We revisit discovery prospects for a long-lived sterile neutrino $N$ at the Large Hadron Collider (LHC) in the context of left-right symmetric theories. We focus on a displaced vertex search strategy sensitive to $\mathcal{O}$(GeV) neutrino masses produced ... More
Nuclear Transparency in Monte Carlo Neutrino Event GeneratorsFeb 14 2019Hadron cascade model is an essential part of Monte Carlo neutrino event generators that governs final state interactions of knocked-out nucleons and produced pions. It is shown that such model enriched with physically motivated modifications of nucleon-nucleon ... More
Measurement of $B^+$, $B^0$ and $Λ_b^0$ production in $p\mkern 1mu\mathrm{Pb}$ collisions at $\sqrt{s_\mathrm{NN}}=8.16\,{\rm TeV}$Feb 14 2019The production of $B^+$, $B^0$ and $\Lambda_b^0$ hadrons is studied in proton-lead collisions at a centre-of-mass energy per nucleon pair of $\sqrt{s_\mathrm{NN}}=8.16\,{\rm TeV}$ recorded with the LHCb detector at the LHC. The measurement uses a dataset ... More
Observation of $B^0_{(s)} \to J/ψp \overline{p}$ decays and precision measurements of the $B^0_{(s)}$ massesFeb 14 2019The first observation of the decays $B^0_{(s)} \to J/\psi p \overline{p}$ is reported, using proton-proton collision data corresponding to an integrated luminosity of $5.2{\text{fb}}^{-1}$, collected with the LHCb detector. These decays are suppressed ... More
On $SU(3)_{F}$ Breaking through Final State Interactions and CP Asymmetries in $D\to P P$ DecaysFeb 14 2019We analyse $D$ decays to two pseudoscalars $(\pi,K)$ assuming the dominant source of $\mathrm{SU}(3)_F$ breaking lies in final state interactions. We obtain an excellent agreement with experimental data and are able to predict CP violation in several ... More
Detecting hidden sector dark matter at HL-LHC and HE-LHC via long-lived stau decaysFeb 14 2019We investigate a class of models where the supergravity model with the standard model gauge group is extended by a hidden sector $U(1)_X$ gauge group and where the lightest supersymmetric particle is the neutralino in the hidden sector. We investigate ... More
Neutrino Physics with the PTOLEMY projectFeb 14 2019The PTOLEMY project aims to develop a scalable design for a Cosmic Neutrino Background (CNB) detector, the first of its kind and the only one conceived that can look directly at the image of the Universe encoded in neutrino background produced in the ... More
Transparent tiles of silica aerogels for high-energy physicsFeb 14 2019Silica aerogels are important to be used as photon radiators in Cherenkov counters for high-energy-physics experiments because of their optical transparency and intermediate refractive indices between those of gases and liquids or solids. Cherenkov counters ... More
Study of fermion pair events at the 250 GeV ILCFeb 14 2019Precise measurements of electroweak processes at the International Linear Collider (ILC) will provide unique opportunities to explore new physics beyond the Standard Model. Fermion pair production events are sensitive to new interactions involving a new ... More
Quark charge identification for $e^{+}e^{-}$ to $q\bar{q}$ studyFeb 14 2019The process $e^{+}e^{-} \to q\bar{q}$ plays an important role in electroweak precision measurements. We are studying this process with ILD full simulation. The key for the reconstruction of the quark pair final states is quark charge identification (ID). ... More
Electroweak Precision Tests of the Standard Model after the Discovery of the Higgs BosonFeb 13 2019The global fit of the Standard Model predictions to electroweak precision data, which has been routinely performed in the past decades by several groups, led to the prediction of the top quark and the Higgs boson masses before their respective discoveries. ... More
Constraints on nuclear parton distributions from dijet photoproduction at the LHCFeb 13 2019Using QCD calculations of the cross section of inclusive dijet photoproduction in Pb-Pb ultraperipheral collisions in the LHC kinematics as pseudo-data, we study the effect of including these data using the Bayesian reweighting technique on nCTEQ15, nCTEQ15np, ... More
Quark Gluon Plasma Formation in Proton-Proton Collisions Using PYTHIAFeb 13 2019The aim of this study is to investigate the possibility of the Quark Gluon Plasma (QGP) formation in proton-proton (p-p) collisions. The p-p collisions at center of mass energies $\sqrt{s_{_{NN}}} = 200$ $GeV$ and $\sqrt{s_{_{NN}}} = 13$ $TeV$ were simulated ... More
SUSY Signals from QCD Production at the Upgraded LHCFeb 13 2019Weak-scale supersymmetry remains to be one of the best-motivated theories of physics beyond the Standard Model. We evaluate the sensitivities of the High Luminosity (HL) and High Energy (HE) upgrades of the LHC to gluinos and stops, decaying through the ... More
Equation of state at finite densities for QCD matter in nuclear collisionsFeb 13 2019We construct the QCD equation of state at finite chemical potentials including net baryon, electric charge, and strangeness, based on the conserved charge susceptibilities determined from lattice QCD simulations and the equation of state of the hadron ... More
Revisiting the Dark Photon Explanation of the Muon g-2 AnomalyFeb 13 2019A massive $U(1)^{\prime}$ gauge boson, "dark photon" or $A^{\prime}$, has long been proposed as a potential explanation of the muon $g-2$ anomaly ($g_{\mu} - 2$). However, recent experimental results have excluded this possibility for a dark photon exhibiting ... More
Quenching of hadron spectra in XeXe and PbPb collisions at the LHCFeb 13 2019The $p_\perp$ dependence of the nuclear modification factor $R_{\text{AA}}$ measured in PbPb collisions at the LHC exhibits a universal shape, which can be very well reproduced in a simple energy loss model based on the BDMPS medium-induced gluon spectrum. ... More
Prospects of measuring Higgs boson decays into muon pairs at the ILCFeb 13 2019We study the prospects of measuring the decay of the Higgs boson into a pair of muons at the International Linear Collider (ILC). The study is performed at center-of-mass energies of 250\,GeV and 500\,GeV, with fully-simulated Monte-Carlo samples based ... More
Triple prompt $J/ψ$ hadroproduction as a hard probe of multiple-parton scatteringsFeb 13 2019We propose the process of triple prompt $J/\psi$ hadroproduction is a very clean hard probe of multiple-parton scatterings at high-energy hadron colliders, especially the least known triple-parton scattering. A first complete study is carried out by considering ... More
What $R_K$ and $Q_5$ can tell us about New Physics in $b\to s\ell\ell$ transitions?Feb 13 2019The deviations with respect to the Standard Model that are currently observed in $b \to s \ell\ell$ transitions, or $B$ anomalies, can be interpreted in terms of different New Physics (NP) scenarios within a model-independent effective approach. We identify ... More
A fresh look at ALP searches in fixed target experimentsFeb 13 2019A significant number of high power proton beams are available or will go online in the near future. This provides exciting opportunities for new fixed target experiments and the search for new physics in particular. In this note we will survey these beams ... More
Radiative $b$-baryon decays to measure the photon and $b$-baryon polarizationFeb 13 2019Feb 18 2019The radiative decays of $b$-baryons facilitate the direct measurement of photon helicity in $b\to s\gamma$ transitions thus serving as an important test of physics beyond the Standard Model. In this paper we analyze the complete angular distribution of ... More
Radiative $b$-baryon decays to measure the photon and $b$-baryon polarizationFeb 13 2019The radiative decays of $b$-baryons facilitate the direct measurement of photon helicity in $b\to s\gamma$ transitions thus serving as an important test of physics beyond the Standard Model. In this paper we analyze the complete angular distribution of ... More
Measurement of the branching fraction of $J/ψ\rightarrow ω η' π^{+}π^{-}$ and search for $J/ψ\rightarrow ωX(1835), \, X(1835) \rightarrow η' π^{+}π^{-}$ decayFeb 13 2019Using a sample of $1.31 \times 10^{9}$ $J/\psi$ events collected by the BESIII detector at BEPCII during 2009 and 2012, we study the $J/\psi \rightarrow \omega \eta' \pi^{+}\pi^{-}$ hadronic process. For the first time, we measure the branching ratio ... More
Lepton flavor violation induced by neutral and doubly-charged scalars at future lepton collidersFeb 13 2019New physics scenarios beyond the Standard Model (SM) for neutrino mass mechanism often necessitate the existence of a neutral scalar $H$ and/or doubly-charged scalar $H^{\pm\pm}$, which couple to the SM charged leptons in a flavor violating way, while ... More
Theoretical predictions on polarization asymmetry for Drell-Yan process with spin-one deuteron and tensor-polarized structure function $b_1$Feb 13 2019We report recent theoretical progress on a polarization asymmetry in the proton-deuteron Drell-Yan process with a polarized-deuteron target and the tensor-polarized structure function $b_1$. Experimental measurements are possible at JLab for $b_1$ and ... More
Search for Higgs-like particles produced in association with bottom quarks in proton-antiproton collisionsFeb 13 2019We report on a search for a spin-zero non-standard-model particle in proton-antiproton collisions collected by the Collider Detector at Fermilab at a center-of-mass-energy of 1.96 TeV. This particle, the $\phi$ boson, is expected to decay into a bottom-antibottom ... More
Constraints on bosonic dark matter from ultralow-field nuclear magnetic resonanceFeb 12 2019The nature of dark matter, the invisible substance making up over $80\%$ of the matter in the Universe, is one of the most fundamental mysteries of modern physics. Ultralight bosons such as axions, axion-like particles or dark photons could make up most ... More
A Dark Matter Interpretation of the ANITA Anomalous EventsFeb 12 2019The ANITA collaboration recently reported the detection of two anomalous upward-propagating extensive air showers exiting the Earth with relatively large emergence angles and energies in the range $\mathcal{O}(0.5\!-\!1)~\mathrm{EeV}$. We interpret these ... More
High Quality Factor High-Temperature Superconducting Microwave Cavity Development for the Dark Matter Axion Search in a Strong Magnetic FieldFeb 12 2019We demonstrate a superconducting (SC) microwave (mw) cavity that can accelerate the dark matter search by maintaining superconductivity in a high DC magnetic field. We used high-temperature superconductor (HTSC) yttrium barium copper oxide (YBCO) with ... More
High Quality Factor High-Temperature Superconducting Microwave Cavity Development for the Dark Matter Axion Search in a Strong Magnetic FieldFeb 12 2019Feb 13 2019We demonstrate a superconducting (SC) microwave (mw) cavity that can accelerate the dark matter search by maintaining superconductivity in a high DC magnetic field. We used high-temperature superconductor (HTSC) yttrium barium copper oxide (YBCO) with ... More
Probing baryon asymmetry of the Universe at LHC and SHiPFeb 12 2019The origin of the baryon asymmetry of the Universe (BAU) is one of the major puzzles beyond the Standard Model. Detecting the particles responsible for the generation of the BAU would enormously boost our understanding of physics of the early Universe. ... More
Toward ternary fission accompanied by the ${}^{8}$Be nucleusFeb 12 2019Experiments in preparation for search for uranium ternary fission by means of nuclear track emulsion are summarized. The study will be focused on the possible involvement of the unstable nucleus ${}^{8}$Be in the suggested scenario of the collinear tri-partition ... More
Azimuthal separation in nearly back-to-back jet topologies in inclusive 2- and 3-jet events in pp collisions at $\sqrt{s}=$ 13 TeVFeb 12 2019A measurement for inclusive 2- and 3-jet events of the azimuthal correlation between the two jets with the largest transverse momenta, $\Delta\phi_{12}$ , is presented. The measurement considers events where the two leading jets are nearly collinear ("back-to-back") ... More
Hadron tomography in meson-pair production and gravitational form factorsFeb 12 2019Generalized parton distributions (GPDs) are 3-dimensional (3D) structure functions for hadrons, and they are important for solving the proton spin puzzle including partonic orbital-angular-momentum contributions. The $s$-$t$ crossed quantities of the ... More
Understanding and constraining the PDF uncertainties in a W boson mass measurement with LHCbFeb 12 2019Precision electroweak tests are a powerful probe of physics beyond the Standard Model, but the sensitivity is limited by the precision with which the $W$ boson mass ($M_W$) has been measured. The Parton Distribution Function (PDF) uncertainties are a ... More
Searching in CMS Open Data for Dimuon Resonances with Substantial Transverse MomentumFeb 12 2019We study dimuon events in 2.11/fb of 7 TeV pp collisions, using CMS Open Data, and search for a narrow dimuon resonance with moderate mass (14-66 GeV) and substantial transverse momentum (pT). Applying dimuon pT cuts of 25 GeV and 60 GeV, we explore two ... More
Hardware Demonstrator of a Compact First-Level Muon Track Trigger for Future Hadron Collider ExperimentsFeb 11 2019Single muon triggers are crucial for the physics programmes at hadron collider experiments. To be sensitive to electroweak processes, single muon triggers with transverse momentum thresholds down to 20 GeV and dimuon triggers with even lower thresholds ... More
Neutrinoless Double-Beta Decay: Status and ProspectsFeb 11 2019Neutrinoless double-beta decay is a forbidden, lepton-number-violating nuclear transition whose observation would have fundamental implications for neutrino physics, theories beyond the Standard Model and cosmology. In this review, we summarize the theoretical ... More
Dark Matter Search Results from the Complete Exposure of the PICO-60 C$_3$F$_8$ Bubble ChamberFeb 11 2019Final results are reported from operation of the PICO-60 C$_3$F$_8$ dark matter detector, a bubble chamber filled with 52 kg of C$_3$F$_8$ located in the SNOLAB underground laboratory. The chamber was operated at thermodynamic thresholds as low as 1.2 ... More
Beyond the Standard Model Physics at the High Luminosity LHCFeb 11 2019The High-Luminosity Large Hadron Collider (HL-LHC) is expected to deliver an integrated luminosity of up to 3000 fb$^{-1}$. The very high instantaneous luminosity will lead to about 200 proton-proton collisions per bunch crossing (pileup) superimposed ... More
Search for neutral-current induced single photon production at the ND280 near detector in T2KFeb 11 2019Neutrino neutral-current induced single photon production is a sub-leading order process for accelerator-based neutrino beam experiments including T2K. It is, however, an important process to understand because it is a background for electron (anti)neutrino ... More
Electron reconstruction and identification in the ATLAS experiment using the 2015 and 2016 LHC proton-proton collision data at $\sqrt{s}$ = 13 TeVFeb 11 2019Algorithms used for the reconstruction and identification of electrons in the central region of the ATLAS detector at the Large Hadron Collider (LHC) are presented in this paper; these algorithms are used in ATLAS physics analyses that involve electrons ... More
Precision measurement of the branching fractions of $η^\prime$ decaysFeb 11 2019Based on a sample of $(1310.6 \pm 7.0) \times 10^6~J/\psi$ events collected with the BESIII detector, we present measurements of $J/\psi$ and $\eta^\prime$ absolute branching fractions using the process $J/\psi\rightarrow\gamma\eta^\prime$. By analyzing ... More
Production of open charm and beauty states in pPb collisions with LHCbFeb 11 2019This talk summarizes the LHCb measurements of charm and beauty hadron productions in proton-lead collisions. The studies are made down to very low-\pt of the observed heavy flavor hadrons using fully reconstructed decays. Nuclear matter effects are quantified ... More
Neutron-mirror neutron oscillations in starsFeb 10 2019Based on a newly proposed model of neutron-mirror neutron ($n-n'$) oscillations, evolution and nucleosynthesis in single stars under a new theory is presented. The new theory with the new $n-n'$ model can demonstrate the evolution in a much more convincing ... More
Neutron-mirror neutron oscillations in starsFeb 10 2019Feb 12 2019Based on a newly proposed model of neutron-mirror neutron ($n-n'$) oscillations, evolution and nucleosynthesis in single stars under a new theory is presented. The new theory with the new $n-n'$ model can demonstrate the evolution in a much more convincing ... More
Longitudinal spin asymmetries in polarized deuteron DIS with spectator taggingFeb 10 2019Polarized electron-deuteron DIS with spectator proton tagging offers a way of measuring the neutron spin structure functions with maximal theoretical control of nuclear effects. We calculate the nuclear structure factors in the longitudinal double-spin ... More
Coherent J/$ψ$ photoproduction in Pb-Pb collisions with nuclear overlap studied with ALICE at the LHCFeb 10 2019The photoproduction of heavy vector mesons in the electromagnetic interactions of ultra-relativistic nuclei is sensitive to the gluon distribution in the nucleus and thus to cold nuclear matter effects like shadowing or parton saturation. Besides the ... More
Pseudorapidity distributions of charged hadrons in xenon-xenon collisions at $\sqrt{s_\mathrm{NN}} =$ 5.44 TeVFeb 10 2019Measurements of the pseudorapidity distributions of charged hadrons produced in xenon-xenon collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{s_\mathrm{NN}} =$ 5.44 TeV are presented. The measurements are based on data collected by the CMS ... More