Latest in nucl-ex

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Event-by-Event Efficiency Fluctuations and Efficiency Correction for Cumulants of Superposed Multiplicity Distributions in Relativistic Heavy-ion Collision ExperimentsFeb 08 2018We performed systematic studies for the effects of event-by-event efficiency fluctuations on efficiency correction for cumulant analysis in relativistic heavy-ion collision experiments. Experimentally, particle efficiencies of events measured with different ... More
Spectroscopic Criteria for Identification of Nuclear Tetrahedral and Octahedral Symmetries: Illustration on a Rare Earth NucleusFeb 08 2018We formulate criteria of identification of the nuclear tetrahedral and octahedral symmetries and illustrate for the first time their possible realization in a Rare Earth nucleus 152Sm. We use realistic nuclear mean-field theory calculations with the phenomenological ... More
Nuclear physics uncertainties of the astrophysical gamma-process studied through the 64Zn(p,alpha)61Cu and 64Zn(p,gamma)65Ga reactionsFeb 08 2018In a recent work, the cross section measurement of the 64Zn(p,alpha)61Cu reaction was used to prove that the standard alpha-nucleus optical potentials used in astrophysical network calculation fail to reproduce the experimental data at energies relevant ... More
Transverse Extension of Partons in the Proton probed by Deeply Virtual Compton ScatteringFeb 08 2018We report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/$c$ polarized $\mu^+$ and $\mu^-$ beams of the CERN SPS impinging on a liquid hydrogen target. We determine the dependence of the average ... More
Structure of even-even Cadmium isotopes from the beyond-mean-field interacting boson modelFeb 07 2018The structure of even-even $^{108-116}$Cd isotopes is investigated based on the self-consistent mean-field approach. By mapping the quadrupole-$(\beta,\gamma)$ deformation energy surface, obtained from the constrained self-consistent mean-field calculations ... More
Predictions for isobaric collisions at $\sqrt{s_{_{\rm NN}}}$ = 200 GeV from a multiphase transport modelFeb 07 2018The isobaric collisions of $^{96}_{44}$Ru + $^{96}_{44}$Ru and $^{96}_{40}$Zr + $^{96}_{40}$Zr have recently been proposed to discern the charge separation signal of the chiral magnetic effect (CME). In this article, we employ the string melting version ... More
Measurement of the nuclear modification factor for high-$p_{\mathrm{T}}$ charged hadrons in $p$+Pb collisions with the ATLAS detectorFeb 06 2018The charged hadron spectra in $p$+Pb and $pp$ collisions at $\sqrt{s_{NN}}=\sqrt{s}=5.02$TeV are measured with the ATLAS experiment at the LHC. The measurements are performed with $p$+Pb data recorded in 2013 with an integrated luminosity of 25nb${}^{-1}$ ... More
Measurement of the charged-hadron spectra and nuclear modification factor in lead--lead collisions with the ATLAS detectorFeb 06 2018The ATLAS experiment at the Large Hadron Collider (LHC) measures charged hadron spectra obtained in 2010 and 2011 lead-lead LHC data taking periods with total integrated statistics of 0.15nb${}^{-1}$. The results are compared to the $pp$ spectra of charged ... More
Growth and characterization of a Li2Mg2(MoO4)3 scintillating bolometerFeb 06 2018Lithium magnesium molybdate (Li$_2$Mg$_2$(MoO$_4$)$_3$) crystals were grown by the low-thermal-gradient Czochralski method. Luminescence properties of the material (emission spectra, thermally stimulated luminescence, dependence of intensity on temperature, ... More
Impact of medium modification of the nucleon weak and electromagnetic form factors on the neutrino mean free path in dense matterFeb 06 2018Impact of the in-medium modified nucleon weak and electromagnetic form factors on the neutrino mean free path in dense matter is studied by considering both the weak and electromagnetic interactions of neutrinos with the constituents of the matter. A ... More
Sensitivity of Proposed Search for Axion-induced Magnetic Field using Optically Pumped MagnetometersFeb 05 2018We investigate a search for the oscillating current induced by axion dark matter in an external magnetic field using optically pumped magnetometers (OPMs). This experiment is based upon the LC circuit axion detection concept of Sikivie, Sullivan, and ... More
Sensitivity of Proposed Search for Axion-induced Magnetic Field using Optically Pumped MagnetometersFeb 05 2018Feb 07 2018We investigate a search for the oscillating current induced by axion dark matter in an external magnetic field using optically pumped magnetometers (OPMs). This experiment is based upon the LC circuit axion detection concept of Sikivie, Sullivan, and ... More
Photoproduction of the $Λ$(1405) HyperonFeb 05 2018We propose to use the high current photon beam available at A2 to produce the isosinglet $\Lambda(1405)1/2^-$ hyperon at threshold via $\gamma p\rightarrow K^+\Lambda(1405)$. Its nature is still controversial and actively debated. Since the only available ... More
Search for the Neutron Decay n$\rightarrow$ X+$γ$ where X is a dark matter particleFeb 05 2018In a recent paper submitted to Physical Review Letters, Fornal and Grinstein have suggested that the discrepancy between two different methods of neutron lifetime measurements, the beam and bottle methods can be explained by a previously unobserved dark ... More
Electron shakeoff following the \b{eta}+ decay of 19Ne+ and 35Ar+ trapped ionsFeb 05 2018The electron shakeoff of 19F and 35Cl atoms resulting from the \b{eta}+ decay of 19Ne+ and 35Ar+ ions has been investigated using a Paul trap coupled to a time of flight recoil-ion spectrometer. The charge-state distributions of the recoiling daughter ... More
On the photon or meson formation in $J/ψ$ decays into $p {\overline{p}}$Feb 02 2018The measurements of the $J/\psi \rightarrow \gamma p \overline{p}$ decays by the BES Collaboration indicate an enhancement at the $p \overline{p}$ threshold which, however, is present neither in the J/$\psi$ decays into $\omega p \overline{p}$ nor into ... More
A high-resolution study of levels in the astrophysically important nucleus $^{26}$Mg and resulting updated level assignmentsFeb 02 2018The $^{22}$Ne($\alpha,n$)$^{25}$Mg reaction is an important source of neutrons for the s-process. Due to the difficulty in directly measuring the cross section of this reaction and the competing $^{22}$Ne($\alpha,\gamma$)$^{26}$Mg reaction, indirect methods ... More
Precise half-life measurement of the superallowed emitter 30SFeb 01 2018We have measured the half-life of 30S, the parent of a superallowed 0+-to-0+ beta transition, to high precision using very pure sources and a 4pi proportional gas counter to detect the decay positrons. Our result for the half-life is 1.17992(34) s. As ... More
Multi-particle azimuthal cumulants in p+Pb collisions from a multiphase transport modelFeb 01 2018A new subevent cumulant method was recently developed, which can significantly reduce the non-flow contributions in long-range correlations for small systems. In this work, we use both standard and subevent cumulant methods to study multi-particle correlations ... More
High-spin spectroscopy and shell-model interpretation of the N < 126 radium isotopes $^{212}$Ra and $^{213}$RaJan 31 2018The level structures of $^{212}$Ra and $^{213}$Ra have been established via time-correlated $\gamma$-ray spectroscopy following the $^{204}$Pb($^{12}$C,4$n$)$^{212}$Ra and $^{204}$Pb($^{13}$C,4$n$)$^{213}$Ra reactions. In $^{212}$Ra, levels up to $\sim ... More
The impact of $\mathbf{K^+Λ}$ photoproduction on the resonance spectrumJan 31 2018The J\"ulich-Bonn coupled-channel framework is extended to $K^+\Lambda$ photoproduction. The spectrum of nucleon and $\Delta$ resonances is extracted from simultaneous fits to several pion-induced reactions in addition to pion, eta and $K^+\Lambda$ photoproduction ... More
N* Experiments and their Impact on Strong QCD PhysicsJan 29 2018I give a brief overview of experimental studies of the spectrum and the structure of the excited states of the nucleon and what we learn about their internal structure. The focus is on the effort to obtain a more complete picture of the light-quark baryon ... More
Nucleon Resonance Structure from Exclusive Meson Electroproduction with CLASJan 29 2018Feb 01 2018Studies of the nucleon resonance electroexcitation amplitudes in a wide range of photon virtualities offer unique information on many facets of strong QCD behind the generation of all prominent excited nucleon states. Advances in the evaluation of resonance ... More
What does the matter created in high multiplicity proton-nucleus collisions teach us about the 3-D structure of the proton?Jan 29 2018The study of multiparticle correlations and collectivity in the hot and dense matter created in collisions of heavy-ions as well as those of smaller systems such as proton--heavy-ion collisions has progressed to the point where detailed knowledge of the ... More
Understanding the Low-Energy Enhancement of the $γ$-ray Strength Function of $^{56}$FeJan 29 2018A model-independent technique was used to determine the $\gamma$-ray Strength Function ($\gamma$SF) of $^{56}$Fe down to $\gamma$-ray energies less than 1 MeV for the first time with GRETINA using the $(p,p')$ reaction at 16 MeV. No difference was observed ... More
Origin of a maximum of astrophysical $S$ factor in heavy-ion fusion reactions at deep subbarrier energiesJan 29 2018The hindrance phenomenon of heavy-ion fusion cross sections at deep subbarrier energies often accompanies a maximum of an astrophysical $S$ factor at a threshold energy for fusion hindrance. We argue that this phenomenon can naturally be explained when ... More
Light nuclei production as a probe of the QCD phase diagramJan 29 2018We argue that there should exist two maxima in the collision energy dependence of the baryon density fluctuation in heavy-ion collisions, i.e., a lower energy one due to the spinodal instability in the first-order phase transition and a higher energy ... More
Observation of the anomalous isotopic symmetry breaking in central diffractive production of the $f_1(1285)$ and $a^0_0(980)$ resonancesJan 29 2018At very high energies, and in the central region ($x_F\simeq0$), the double-Pomeron exchange mechanism gives the dominant contribution to production of hadrons with the positive $C$-parity and isospin $I=0$. Therefore, the observation of resonances in ... More
Gamow-Teller transitions from high-spin isomers in $N=Z$ nucleiJan 27 2018Gamow-Teller (GT) transitions from high-spin isomers are studied using the sum-rule approach and the shell model. The GT transition strengths from the high-spin isomeric states show a stronger collectivity than those from the ground states in two $N=Z$ ... More
How hadron collider experiments contributed to the development of QCD: from hard-scattering to the perfect liquidJan 26 2018A revolution in elementary particle physics occurred during the period from the ICHEP1968 to the ICHEP1982 with the advent of the parton model from discoveries in Deeply Inelastic electron-proton Scattering at SLAC, neutrino experiments, hard-scattering ... More
Improving r-process calculations for the rare-earth abundance peak via mass measurements at JYFLTRAPJan 26 2018Feb 01 2018The rare-earth peak in the $r$-process abundance pattern depends sensitively on both the astrophysical conditions and subtle changes in nuclear structure in the region. This work takes an important step elucidating the nuclear structure and reducing the ... More
Microscopically-based energy density functionals for nuclei using the density matrix expansion: Full optimization and validationJan 25 2018We seek to obtain a usable form of the nuclear energy density functional that is rooted in the modern theory of nuclear forces. We thus consider a functional obtained from the density matrix expansion of local nuclear potentials from chiral effective ... More
N* Structure and Strong QCDJan 25 2018In attempting to match QCD with Nature, it is necessary to confront the many complexities of strong, nonlinear dynamics in relativistic quantum field theory, e.g. the loss of particle number conservation, the frame and scale dependence of the explanations ... More
Extracting Particle Physics Information from Direct Detection of Dark Matter with Minimal AssumptionsJan 25 2018In the absence of direct accelerator data to constrain particle models, and given existing astrophysical uncertainties associated with the phase space distribution of WIMP dark matter in our galactic halo, extracting information on fundamental particle ... More
Removal and Binding Energies in Lepton Nucleus ScatteringJan 24 2018We investigate the Fermi momentum and nuclear interaction energy parameters that should be used in modeling quasielastic (QE) electron and neutrino scattering on bound nucleons within the framework of the Relativistic Fermi Gas model (RFG). We apply both ... More
Energy dependence of cross section of photonuclear reactions on indium isotopesJan 24 2018Experimental isomeric yield ratios for the 113In({\gamma},n)112m,gIn reactions on the betatron B25/30 bremsstrahlung gamma beam of energy range 12-25 MeV are measured. Effective cross-sections of ({\gamma},n)-reactions with 112mIn and 114mIn isomers output ... More
Differential cross section and photon-beam asymmetry for the gamma p -> pi- Delta++(1232) reaction at forward pi- angles for Egamma=1.5-2.95 GeVJan 24 2018Differential cross sections and photon-beam asymmetries for the gamma p -> pi- Delta++(1232) reaction have been measured for 0.7<cos(theta)<1 and Egamma=1.5-2.95 GeV at SPring-8/LEPS. The first-ever high statistics cross section data are obtained in this ... More
Beam energy dependence of the anisotropic flow coefficients v$_n$Jan 24 2018Recent STAR measurements of the anisotropic flow coefficients, v$_{n}$, are presented for Au+Au collisions spanning the beam energy range $\sqrt{s_{NN}} = 7.7 - 200$~GeV. The measurements indicate dependences on harmonic number, $n$, transverse momentum ... More
Spin-1 particles and perturbative QCDJan 23 2018Due to the angular condition in the light-front dynamics (LFD), the extraction of the electromagnetic form factors for spin-1 particles can be uniquely determined taking into account implicitly non-valence and/or the zero-mode contributions to the matrix ... More
Uncertainties in radiative neutron-capture rates relevant to the $A\sim 80$ $r$-process peakJan 23 2018The rapid neutron-capture process ($r$-process) has for the first time been confirmed to take place in a neutron-star merger event. A detailed understanding of the rapid neutron-capture process is one of the holy grails in nuclear astrophysics. In this ... More
Evidence for high excitation energy resonances in the 7 alpha disassembly of $^{28}$SiJan 23 2018The excitation function for the 7 alpha de-excitation of $^{28}$Si nuclei excited to high excitation energies in the collisions of 35 MeV/nucleon $^{28}$Si with $^{12}$C reveals resonance structures that may indicate the population of high spin toroidal ... More
Valence-quark structure N* resonances from DSEsJan 22 2018We present a unified Quantum Chromodynamics (QCD)-based description of elastic and transition electromagnetic form factors involving the nucleon and its resonances. We compare predictions made using a framework built upon a Faddeev equation kernel and ... More
Investigation of complete and incomplete fusion in $^{7}$Li+$^{124}$Sn reaction around Coulomb barrier energiesJan 22 2018The complete and incomplete fusion cross sections for $^{7}$Li+$^{124}$Sn reaction were measured using online and offline characteristic $\gamma$-ray detection techniques. The complete fusion (CF) cross sections at energies above the Coulomb barrier were ... More
Measurement of low-energy background events due to $^{222}$Rn contamination on the surface of a NaI(Tl) crystalJan 22 2018It has been known that decays of $^{222}$Rn and its daughter elements on the surface of a detector cause significant background at energies below 10~keV. In particular $^{210}$Pb and $^{210}$Po decays on the crystal surface result in significant background ... More
Combined Constraints on the Equation of State of Dense Neutron-Rich Matter from Terrestrial Experiments and Observations of Neutron StarsJan 21 2018Within the parameter space of equation of state (EOS) of dense neutron-rich matter limited by existing constraints mainly from terrestrial nuclear experiments, we investigate how the neutron star maximum mass $M_{\rm{max}}>2.01\pm0.04$ M$_\odot$, radius ... More
Total and differential cross sections of $η$-production in proton-deuteron fusion for excess energies between $Q_η=13\;\text{MeV}$ and $Q_η=81\;\text{MeV}$Jan 20 2018New data on both total and differential cross sections of the production of $\eta$ mesons in proton-deuteron fusion to ${}^3\text{He}\,\eta$ in the excess energy region $13.6\;\text{MeV}\leq Q_\eta \leq 80.9\;\text{MeV}$ are presented. These data have ... More
Measurement of $\hat{q}$ in RHI collisions using di-hadron correlationsJan 19 2018In the BDMPSZ model, the energy loss of an outgoing parton in a medium $-dE/dx$ is the transport coefficient $\hat{q}$ times $L$ the length traveled. This results in jet quenching, which is well established. However BDMPSZ also predicts an azimuthal broadening ... More
Hadron tomography and its application to gravitational radii of hadronsJan 19 2018Hadron tomography has been investigated by three-dimensional structure functions, such as generalized parton distributions (GPDs) and generalized distribution amplitudes (GDAs). The GDAs are $s$-$t$ crossed quantities of the GPDs, and both functions probe ... More
The radiative corrections to double-Dalitz decays revisitedJan 18 2018In this study, we revisit and complete the full next-to-leading order corrections to pseudoscalar double-Dalitz decays within the soft-photon approximation. Comparing to the previous study, we find small differences, which are nevertheless relevant for ... More
On Determining Dead Layer and Detector Thicknesses for a Position-Sensitive Silicon DetectorJan 18 2018In this work, two particular properties of the position-sensitive, thick silicon detectors (known as the "E" detectors) in the High Resolution Array (HiRA) are investigated: the thickness of the dead layer on the front of the detector, and the overall ... More
Constituent quarks and systematic errors in mid-rapidity charged multiplicity $dN_{\rm ch}/dη$ distributionsJan 16 2018Centrality definition in A$+$A collisions at colliders such as RHIC and LHC suffers from a correlated systematic uncertainty caused by the efficiency of detecting a p$+$p collision ($50\pm 5\%$ for PHENIX at RHIC). In A$+$A collisions where centrality ... More
Study of Rare Nuclear Processes with CUOREJan 16 2018Jan 17 2018TeO2 bolometers have been used for many years to search for neutrinoless double beta decay in 130-Te. CUORE, a tonne-scale TeO2 detector array, recently published the most sensitive limit on the half-life, $T_{1/2}^{0\nu} > 1.5 \times 10^{25}\,$yr, which ... More
Light-Meson Spectroscopy at GlueXJan 16 2018GlueX at Jefferson Lab aims to study the light meson spectrum with an emphasis on the search for light hybrid mesons. To this end, a linearly-polarized $9\,$GeV photon beam impinges on a hydrogen target contained within a hermetic detector with near-complete ... More
Observation of medium induced modifications of jet fragmentation in PbPb collisions using isolated-photon-tagged jetsJan 15 2018Measurements of fragmentation functions for jets associated with an isolated photon are presented for the first time in pp and PbPb collisions. The analysis uses data collected with the CMS detector at the CERN LHC at a nucleon-nucleon center-of-mass ... More
$Ab~initio$ calculations for Gamow-Teller strengths in $sd$ shellJan 15 2018In the present work we perform a systematic shell model study of Gamow-Teller transition strength distributions in $sd$ shell nuclei using $ab~initio$ effective interactions. The $ab~initio$ effective interactions are based on in-medium similarity renormalization ... More
Nucleon viewed as a Borromean Bound-StateJan 15 2018We explain how the emergent phenomenon of dynamical chiral symmetry breaking ensures that Poincar\'e covariant analyses of the three valence-quark scattering problem in continuum quantum field theory yield a picture of the nucleon as a Borromean bound-state, ... More
First Measurement of Monoenergetic Muon Neutrino Charged Current InteractionsJan 11 2018We report the first measurement of monoenergetic muon neutrino charged current interactions. MiniBooNE has isolated 236 MeV muon neutrino events originating from charged kaon decay at rest ($K^+ \rightarrow \mu^+ \nu_\mu$) at the NuMI beamline absorber. ... More
Cadmium Resonance Parameters from Neutron Capture and Transmission Measurements at the RPI LINACJan 10 2018Cadmium has been used historically as an important component of integral experiments because of its high thermal neutron absorption cross section. Correct interpretation of such experiments depends on accurate differential neutron cross section measurements. ... More
Improved search for two-neutrino double electron capture on $^{124}$Xe and $^{126}$Xe using particle identification in XMASS-IJan 10 2018We conducted an improved search for the simultaneous capture of two $K$-shell electrons on the $^{124}$Xe and $^{126}$Xe nuclei with emission of two neutrinos using 800.0 days of data from the XMASS-I detector. A novel method to discriminate $\gamma$-ray/$X$-ray ... More
Generalized Lomb-Scargle analysis of $\rm{^{90}Sr/^{90}Y}$ decay rate measurements from the Physikalisch-Technische BundesanstaltJan 10 2018We apply the generalized Lomb-Scargle (LS) periodogram to independently confirm the claim by Sturrock et al (arXiv:1605.03088) of oscillation at a frequency of 11/year in the decay rates of $\rm{^{90}Sr/^{90}Y}$ from measurements at the Physikalisch Technische ... More
Construction and Performance of the Barrel Electromagnetic Calorimeter for the GlueX ExperimentJan 09 2018The barrel calorimeter is part of the new spectrometer installed in Hall D at Jefferson Lab for the GlueX experiment. The calorimeter was installed in 2013, commissioned in 2014 and has been operating routinely since early 2015. The detector configuration, ... More
New mass anchor points for neutron-deficient heavy nuclei from direct mass measurements of radium and actinium isotopesJan 09 2018The masses of the exotic isotopes $^{210-214}$Ac and $^{210-214}$Ra have been measured with a multi-reflection time-of-flight mass spectrograph. These isotopes were obtained in flight as fusion-evaporation products behind the gas-filled recoil ion separator ... More
Precision determination of absolute neutron fluxJan 08 2018A technique for establishing the total neutron rate of a highly-collimated monochromatic cold neutron beam was demonstrated using a method of an alpha-gamma counter. The method involves only the counting of measured rates and is independent of neutron ... More
Probing the single-particle character of rotational states in $^{19}$F using a short-lived isomeric beamJan 08 2018A beam containing a substantial component of both the $J^{\pi}=5^+$, $T_{1/2}=162$ ns isomeric state of $^{18}$F and its $1^+$, 109.77-min ground state has been utilized to study members of the ground-state rotational band in $^{19}$F through the neutron ... More
$η$ and $η'$ photoproduction with EtaMAID including Regge phenomenologyJan 07 2018We present a new version of the EtaMAID model for $\eta$ and $\eta'$ photoproduction on nucleons. The model includes 23 nucleon resonances parameterized with Breit-Wigner shapes. The background is described by vector and axial-vector meson exchanges in ... More
Separated Kaon Electroproduction Cross Section and the Kaon Form Factor from 6 GeV JLab DataJan 04 2018The $^{1}H$($e,e^\prime K^+$)$\Lambda$ reaction was studied as a function of the Mandelstam variable $-t$ using data from the E01-004 (FPI-2) and E93-018 experiments that were carried out in Hall C at the 6 GeV Jefferson Lab. The cross section was fully ... More
Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scatteringJan 04 2018Jan 18 2018We report the first measurements of the transverse ($P_{x}$ and $P_{y}$) and longitudinal ($P_{z}$) components of the polarization transfer to a bound proton in the deuteron via the $^{2}\mathrm{H}(\vec{e},e'\vec{p})$ reaction, over a wide range of missing ... More
The formation of the heaviest elementsJan 03 2018The rapid neutron-capture process needed to build up many of the elements heavier than iron seems to take place primarily in neutron-star mergers, not supernova explosions.
Fission fragment mass distribution in $^{210}$Po and $^{213}$AtJan 03 2018Background: The influence of shell effect on the dynamics of the fusion fission process and it's evolution with excitation energy in the pre-actinide Hg-Pb region in general is a matter of intense research in recent years. In particular, a strong ambiguity ... More
Direct Measurement of Astrophysically Important Resonances in $^{38}\mathrm{K}(p, γ){}^{39}\mathrm{Ca}$Jan 02 2018According to sensitivity studies, the $^{38}\mathrm{K}\left( p, \gamma \right){}^{39}\mathrm{Ca}$ reaction has a significant influence on $\mathrm{Ar}$, $\mathrm{K}$, and $\mathrm{Ca}$ production in classical novae. In order to constrain the rate of this ... More
Tomography and gravitational radii for hadrons by three-dimensional structure functionsJan 01 2018Three-dimensional tomography of hadrons can be investigated by generalized parton distributions (GPDs), transverse-momentum-dependent parton distributions (TMDs), and generalized distribution amplitudes (GDAs). The GDA studies had been only theoretical ... More
Exclusive photoproduction of $π^0$ up to large values of Mandelstam variables $s, t$ and $u$ with CLASDec 29 2017Exclusive photoproduction cross sections have been measured for the process $\gamma p \rightarrow p\pi^0(e^+e^-(\gamma))$ with the Dalitz decay final state using tagged photon energies in the range of $E_{\gamma} = 1.275-5.425$ GeV. The complete angular ... More
Search for Deeply Bound Kaonic Nuclear States with AMADEUSDec 28 2017We briefly report on the search for Deeply Bound Kaonic Nuclear States with AMADEUS in the Sigma0 p channel following K- absorption on 12C and outline future perspectives for this work.
Performance of the MPD experiment for the anisotropic flow measurementDec 27 2017The main goal of the future MPD experiment at NICA is to explore the QCD phase diagram in the region of highly compressed and hot baryonic matter in the energy range corresponding to the highest chemical potential. Properties of such dense matter can ... More
Exploring Zeptosecond Quantum Equilibration Dynamics: From Deep-Inelastic to Fusion-Fission Outcomes in $^{58}$Ni+$^{60}$Ni ReactionsDec 26 2017Energy dissipative processes play a key role in how quantum many-body systems dynamically evolve towards equilibrium. In closed quantum systems, such processes are attributed to the transfer of energy from collective motion to single-particle degrees ... More
A Review and Outlook for the Removal of Radon-Generated Po-210 Surface ContaminationDec 21 2017The next generation low-background detectors operating deep underground aim for unprecedented low levels of radioactive backgrounds. The deposition and presence of radon progeny on detector surfaces is an added source of energetic background events. In ... More
Centrality determination of Au+Au with HADESDec 21 2017The centrality determination for Au+Au, as measured with HADES at the GSI-SIS18, is described. In order to extract collision geometry related quantities, such as the average impact parameter or number of participating nucleons, a Glauber Monte Carlo approach ... More
Strong evidence for nucleon resonances near 1900\,MeVDec 20 2017Data on the reaction $\gamma p\to K^+\Lambda$ from the CLAS experiments are used to derive the leading multipoles, $E_{0+}$, $M_{1-}$, $E_{1+}$, and $M_{1+}$, from the production threshold to 2180\,MeV in 24 slices of the invariant mass. The four multipoles ... More
$N^*$ resonances from $KΛ$ amplitudes in sliced bins in energyDec 20 2017The two reactions $\gamma p\to K^+\Lambda$ and $\pi^-p\to K^0\Lambda$ are analyzed to determine the leading photoproduction multipoles and the pion-induced partial wave amplitudes in slices of the invariant mass. The multipoles and the partial-wave amplitudes ... More
A Search for deviations from the inverse square law of gravity at nm range using a pulsed neutron beamDec 08 2017We describe an experimental search for deviations from the inverse square law of gravity at the nanometer length scale using neutron scattering from noble gases on a pulsed slow neutron beamline. By measuring the neutron momentum transfer ($q$) dependence ... More
Diffuse axion-like particle searchesDec 05 2017We propose a new method to search for axion-like particles (ALPs) based on the gamma-rays produced concomitant with high-energy astrophysical neutrinos. The existence of high-energy neutrinos implies production of gamma-rays in the same sources. Photons ... More
Precise Neutron Lifetime Measurement with a Solenoidal CoilDec 05 2017Jan 13 2018The neutron lifetime, $\tau$ = 880.2 $\pm$ 1.0 sec , is an important parameter for particle physics and cosmology. There is, however, an 8.4 sec (4.0$\,\sigma$) deviation between the measured value of the neutron lifetime using two methods : one method ... More
Azimuthal anisotropy in Cu+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeVDec 04 2017The azimuthal anisotropic flow of identified and unidentified charged particles has been systematically studied in Cu+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV for harmonics $n=$ 1-4 in the pseudorapidity range $|\eta|<1$. The directed flow in Cu+Au ... More
Large directed flow of open charm mesons probes the three dimensional distribution of matter in heavy ion collisionsDec 04 2017Thermalized matter created in non-central relativistic heavy-ion collisions is expected to be tilted in the reaction plane with respect to the beam axis. The most notable consequence of this forward-backward symmetry breaking is the observation of rapidity-odd ... More
Measurement of emission angle anisotropy via long-range angular correlations with high $p_T$ hadrons in $d$$+$Au and $p$$+$$p$ collisions at $\sqrt{s_{_{NN}}}=200$ GeVNov 24 2017We present measurements of two-particle angular correlations between high-transverse-momentum ($2<p_T<11$ GeV/$c$) $\pi^0$ observed at midrapidity ($|\eta|<0.35$) and particles produced either at forward ($3.1<\eta<3.9$) or backward ($-3.7<\eta<-3.1$) ... More
Measurement of the beam asymmetry $Σ$ and the target asymmetry $T$ in the photoproduction of $ω$ mesons off the proton using CLAS at Jefferson LaboratoryNov 14 2017Dec 01 2017The photoproduction of $\omega$ mesons off the proton has been studied in the reaction $\gamma p\to p\,\omega$ using the CEBAF Large Acceptance Spectrometer (CLAS) and the frozen-spin target (FROST) in Hall B at the Thomas Jefferson National Accelerator ... More
Demonstration of Single Barium Ion Sensitivity for Neutrinoless Double Beta Decay using Single Molecule Fluorescence ImagingNov 13 2017Feb 06 2018A new method to tag the barium daughter in the double beta decay of $^{136}$Xe is reported. Using the technique of single molecule fluorescent imaging (SMFI), individual barium dication (Ba$^{++}$) resolution at a transparent scanning surface has been ... More
Insight into particle production mechanisms via angular correlations of identified particles measured with ALICE in pp collisions at $\mathbf{\sqrt{\textit s}}=7$ TeVNov 13 2017Two-particle correlations as a function of $\Delta\eta$ and $\Delta\varphi$ are used in all collision systems to study a wide range of physical phenomena. Examples include the collective behavior of the quark-gluon plasma medium, jets, quantum statistics ... More
Measurement of the Q^2 Dependence of the Deuteron Spin Structure Function g_1 and its Moments at Low Q^2 with CLASNov 06 2017Jan 25 2018We measured the g_1 spin structure function of the deuteron at low $Q^{2}$, where QCD can be approximated with chiral perturbation theory ($\chi$PT). The data cover the resonance region, up to an invariant mass of $W \approx 1.9$ GeV. The generalized ... More
Transverse spin-dependent azimuthal correlations of charged pion pairs measured in p$^\uparrow$+p collisions at $\sqrt{s}$ = 500 GeVOct 27 2017The transversity distribution, which describes transversely polarized quarks in transversely polarized nucleons, is a fundamental component of the spin structure of the nucleon, and is only loosely constrained by global fits to existing semi-inclusive ... More
In-flight energy calibration of the space-borne Compton polarimeter POLAROct 24 2017Dec 18 2017POLAR is a compact wide-field space-borne detector for precise measurements of the linear polarization of hard X-rays emitted by transient sources in the energy range from 50 keV to 500 keV. It consists of a 40$\times$40 array of plastic scintillator ... More
Thermal dileptons as QCD matter probes at SISOct 17 2017Electromagnetic radiation is emitted during the whole course of a heavy-ion collision and can escape from the collision zone without further interactions. This makes it an ideal tool to study the properties of hot and dense QCD matter. To model the space-time ... More
Spectroscopy of excited states of unbound nuclei $^{30}$Ar and $^{29}$ClOct 16 2017Several states of proton-unbound isotopes $^{30}$Ar and $^{29}$Cl were investigated by measuring their in-flight decay products, $^{28}$S+proton+proton and $^{28}$S+proton, respectively. A refined analysis of $^{28}$S-proton angular correlations indicates ... More
Angular Distribution of $γ$-rays from Neutron-Induced Compound States of $^{140}$LaOct 09 2017Jan 03 2018Angular distribution of individual $\gamma$-rays, emitted from a neutron-induced compound nuclear state via radiative capture reaction of ${}^{139}$La(n,$\gamma$) has been studied as a function of incident neutron energy in the epithermal region by using ... More
New Search for Mirror Neutrons at HFIROct 02 2017Oct 25 2017The theory of mirror matter predicts a hidden sector made up of a copy of the Standard Model particles and interactions but with opposite parity. If mirror matter interacts with ordinary matter, there could be experimentally accessible implications in ... More
Semi-Inclusive $π_0$ target and beam-target asymmetries from 6 GeV electron scattering with CLASSep 21 2017We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. We scattered 6-GeV, longitudinally ... More
Lévy-stable two-pion Bose-Einstein correlations in $\sqrt{s_{_{NN}}}=200$ GeV Au$+$Au collisionsSep 17 2017We present a detailed measurement of charged two-pion correlation functions in 0%-30% centrality $\sqrt{s_{_{NN}}}=200$ GeV Au$+$Au collisions by the PHENIX experiment at the Relativistic Heavy Ion Collider. The data are well described by Bose-Einstein ... More
A laser excitation scheme for $^{229\text{m}}$ThSep 16 2017Direct laser excitation of the lowest known nuclear excited state in $^{229}$Th has been a longstanding objective. It is generally assumed that reaching this goal would require a considerably reduced uncertainty of the isomer's excitation energy compared ... More
Spin dependence of η meson production in proton-proton collisions close to thresholdSep 13 2017Nov 28 2017Taking advantage of the high acceptance and axial symmetry of the WASA-at-COSY detector, and the high degree of the polarized proton beam of COSY, the reaction pp{\to} pp{\eta} has been measured close to threshold to explore the analyzing power Ay. The ... More
Importance of d-wave contributions in the charge symmetry breaking reaction $dd \to {}^4\text{He}π^0$Sep 04 2017Jan 08 2018This letter reports the first measurement of the contribution of higher partial waves in the charge symmetry breaking reaction $dd \to {}^4\text{He}\pi^0$ using the WASA-at-COSY detector setup at an excess energy of $Q = 60$ MeV. The determined differential ... More