Latest in nucl-th

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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
Quadrupole and octupole collectivity and cluster structures in neon isotopesFeb 08 2018The lowest positive- and negative-parity bands of $^{20}$Ne and neutron-rich even-even Ne isotopes are investigated using a theoretical framework based on energy density functionals. Starting from a self-consistent relativistic Hartree-Bogoliubov calculation ... 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
Analytical forms of the wave function and the asymmetry for polarization characteristics of the deuteronFeb 08 2018The basic analytical forms of the deuteron wave function (DWF) in a coordinate representation have been reviewed. The asymptotic behaviour of DWF near the origin of coordinates has been analyzed. New analytical forms of DWF as a product of the exponential ... More
Deuteron: analytical forms of wave function and density distributionFeb 08 2018The deuteron wave function can be presented as the table through the respective massifs of numerically values of radial wave functions. In calculations such arrays of numbers in the texts of programs to operate quite difficult. Therefore a used simpler ... 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
Perturbative matching of continuum and lattice quasi-distributionsFeb 07 2018Matching of the quasi parton distribution functions between continuum and lattice is addressed using lattice perturbation theory specifically with Wilson-type fermions. The matching is done for nonlocal quark bilinear operators with a straight Wilson ... 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
Direct, elliptic and triangular flow of protons in Au+Au reactions at 1.23 AGeV: A theoretical analysis of the recent HADES dataFeb 06 2018Recently, the HADES experiment at GSI has provided preliminary data on the direct flow, $v_1$ elliptic flow, $v_2$ and triangular flow, $v_3$ of protons in Au+Au reactions at a beam energy of 1.23 AGeV. Here we present a theoretical discussion of these ... More
Symplectic no-core configuration interaction framework for ab initio nuclear structureFeb 06 2018We introduce a symplectic no-core configuration interaction (SpNCCI) framework for ab initio nuclear structure calculations, in a correlated many-body basis which encodes an approximate Sp(3,R) symmetry of the nucleus. Such a scheme potentially provides ... 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
$^{235}$U(n, f) Independent Fission Product Yield and Isomeric Ratio Calculated with the Statistical Hauser-Feshbach TheoryFeb 05 2018We have developed a Hauser-Feshbach fission fragment decay model, HF$^3$D, which can be applied to the statistical decay of more than 500 primary fission fragment pairs (1,000 nuclides) produced by the neutron induced fission of $^{235}$U. The fission ... More
Nonlinear waves in magnetized quark matter and the reduced Ostrovsky equationFeb 04 2018We study nonlinear waves in a nonrelativistic ideal and cold quark gluon plasma immersed in a strong uniform magnetic field. In the context of nonrelativistic hydrodynamics with an external magnetic field we derive a nonlinear wave equation for baryon ... 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
Application of Nilsson model for deformed nucleus in relativistic heavy ion collisionsFeb 02 2018For spherically symmetric nucleus (Au or Pb), Wood-Saxon (WS) distribution proves to be highly manoeuvrable and aptly suitable in giving nucleon distribution within a nucleus. Incorporating shape modification in WS, earlier attempts were made to explain ... More
Exploring hyperon structure with electromagnetic transverse densitiesFeb 01 2018We explore the structure of the spin-1/2 flavor-octet baryons (hyperons) through their electromagnetic transverse densities. The transverse densities describe the distribution of charge and magnetization at fixed light-front time and enable a spatial ... 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
Quark mass functions and pion structure in the Covariant Spectator TheoryFeb 01 2018The Covariant Spectator Theory is applied to the description of quarks and the pion. The dressed quark mass function is calculated dynamically in Minkowski space and used in the calculation of the pion electromagnetic form factor. The effects of the mass ... More
Structure of the orbital excited $N^*$ from the Schwinger-Dyson equationsJan 31 2018We present progress in the evaluation of $\gamma^* N \rightarrow N^*(1535)$ transition form factors in a quark-diquark picture of these baryons. Our analysis is based upon the fully-consistent treatment of a vector $\times$ vector contact interaction, ... More
On the chiral expansion of vector meson massesJan 31 2018We study the chiral expansion of meson masses and decay constants using a chiral Lagrangian that was constructed previously based on the hadrogenesis conjecture. The one-loop self energies of the Goldstone bosons and vector mesons are evaluated. It is ... More
Hyperfine interaction with the $^{229}$Th nucleus and its low lying isomeric stateJan 31 2018The thorium nucleus with mass number $A=229$ has attracted much interest because its extremely low lying first excited isomeric state at about $8$eV opens the possibility for the development of a nuclear clock. However, neither the exact energy of this ... 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
Process-independent effective coupling. From QCD Green's functions to phenomenologyJan 30 2018This article reports on a very recent proposal for a new type of process-independent QCD effective charge [Phys.Rev.D96(2017)054026] defined, as an anologue of the Gell-Mann-Low effective charge in QCD, on the ground of nothing but the knowledge of the ... More
On the chiral extrapolation of charmed meson massesJan 30 2018We perform an analysis of QCD lattice data on charmed meson masses. The quark-mass dependence of the data set is used to gain information on the size of counter terms of the chiral Lagrangian formulated with open-charm states with J^P= 0^- and J^P =1^- ... More
Comparing many-body approaches against the real helium atom exact solutionJan 30 2018Over time, many different theories and approaches have been developed to tackle the many-body problem in quantum chemistry, condensed-matter physics, and nuclear physics. Here we use the real helium atom, rather than a model, and we use the exact solution ... More
Systematic few-body analysis of eta-d, eta-3He and eta-4He interaction at low energiesJan 30 2018The Alt-Grassberger-Sandhas N-body theory is used to study interaction of eta-mesons with d, 3He, and 4He. Separable expansion of the subamplitudes is adopted to convert the integral equations into the quasi-two-body form. The resulting formalism is applied ... 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
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
Vacuum-like jet fragmentation in a dense QCD mediumJan 29 2018We study the fragmentation of a jet propagating in a dense quark-gluon plasma. Using a leading, double-logarithmic approximation in perturbative QCD, we compute for the first time the effects of the medium on the vacuum-like emissions. We show that, due ... More
Poincaré-covariant analysis of heavy-quark baryonsJan 29 2018We use a symmetry-preserving truncation of meson and baryon bound-state equations in quantum field theory in order to develop a unified description of systems constituted from light- and heavy-quarks. In particular, we compute the spectrum and leptonic ... 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
Isoscalar and Isovector spin response in $sd-$ shell nucleiJan 29 2018The spin magnetic dipole transitions and the neutron-proton spin-spin correlations in $sd-$shell even-even nuclei with $N=Z$ are investigated using shell model wave functions taking into accout enhanced isoscalar (IS) spin-triplet pairing as well as the ... 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
Toward Initial Conditions of Conserved Charges Part I: Spatial Correlations of Quarks and AntiquarksJan 26 2018In this paper, we study the spatial correlations among quarks and antiquarks produced at mid-rapidity by gluon pair production in the color glass condensate framework. This paper is the first part of a series in which we calculate a complete set of quark/quark, ... 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
Probing the tricritical endpoint of QCD phase diagram at NICA-FAIR energiesJan 25 2018In this contributions we discuss the novel version of hadron resonance gas model which is based on the induced surface tension concept. Also we present new arguments in favor of a hypothesis that the chiral symmetry restoration transition in central nuclear ... 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
New Results for Neutron Radiative Capture on 10be at Energies from 25.3 meV to 10.0 meVJan 25 2018It is shown that in the framework of the modified potential cluster model we succeeded in correct describing the available experimental data for neutron radiative capture on 10Be total cross-sections at low, astrophysical and thermal energies. All interaction ... More
From Heavy-Ion Collisions to Compact Stars: Equation of State and Relevance of the System SizeJan 24 2018In this article, we start by presenting state-of-the-art methods allowing us to compute moments related to the globally conserved baryon number, by means of first principle resummed perturbative frameworks. We focus on such quantities for they convey ... 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
From few to many body degrees of freedomJan 24 2018Here, I focus on the use of microscopic, few-body techniques that are relevant in the many-body problem. These methods can be divided into indirect and direct. In particular, indirect methods are concerned with the simplification of the many-body problem ... More
Matter-neutrino resonance in a multi-angle neutrino bulb modelJan 24 2018Simulations of neutrino flavor evolution in compact merger environments have shown that neutrino flavor, and hence nucleosynthesis, can be strongly affected by the presence of matter-neutrino resonances (MNRs), where there is a cancelation between the ... 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
Cluster formation in nuclear reactions from mean-field inhomogeneitiesJan 23 2018Perturbing fluids of neutrons and protons (nuclear matter) may lead, as the most catastrophic effect, to the rearrangement of the fluid into clusters of nucleons. A similar process may occur in a single atomic nucleus undergoing a violent perturbation, ... More
Baryon-antibaryon dynamics in relativistic heavy-ion collisionsJan 23 2018The dynamics of baryon-antibaryon annihilation and reproduction ($B{\bar B} \leftrightarrow 3 M$) is studied within the Parton-Hadron-String Dynamics (PHSD) transport approach for Pb+Pb and Au+Au collisions as a function of centrality from lower Super ... 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
Transport Dynamics of Parton Interactions in pp Collisions at LHC EnergiesJan 23 2018We investigate the transport dynamics of partons in proton-proton collisions at the Large Hadron Collider using a Boltzmann transport approach, the parton cascade model. The calculations include semi-hard pQCD interaction of partons populating the nucleons ... More
Photo- and electroproduction of $K^{+}Λ$ with unitarity-restored isobar modelJan 23 2018Exploiting the isobar model, kaon photo- and electroproduction on the proton in the resonance region comes under scrutiny. An upgrade of our previous model, comprising higher-spin nucleon and hyperon exchanges in the consistent formalism, was accomplished ... More
Pulsar glitch and nuclear EoS: Applicability of superfluid modelJan 22 2018In this contribution, we have made use of the contemporary equation of states (EOSs) for the complete neutron star structure, and confronted them with one particular glitch constrain for the crustal moment of inertia (MOI). We find that with these EOSs, ... More
Vorticity and hyperon polarization at NICA energiesJan 22 2018We study the formation of fluid vorticity and the hyperon polarization in heavy-ion collisions at NICA energies in the framework of the Parton-Hadron-String Dynamic Model, taking into account both hadronic and quark-gluonic (partonic) degrees of freedom. ... 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
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
Internal Plateau in Short GRBs and Quark StarsJan 20 2018Jan 23 2018I summarize our recent calculations on quark stars (QSs), for the purpose of explaining some short gamma-ray bursts characterized by internal plateau in their early X-ray afterglow. According to the present plateau sample, the QS central engine model ... More
Kaon Structure in the confining Nambu-Jona-Lasino ModelJan 19 2018The elastic electromagnetic form factors in the space-like region and valence quark distribution functions for the K+ meson are calculated using the confining Nambu-Jona-Lasinio model with the help of the proper-time regularization scheme, which simulates ... 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
Neutron moderation spectrum considering inelastic scatteringJan 18 2018For the first time an analytic expression for inelastic neutron scattering law for isotropic neutron source considering moderating medium temperature as a parameter was obtained in the present paper within gas model. The obtained scattering law is based ... More
A Dynamical AdS/Yang-Mills ModelJan 18 2018The Anti-de Sitter Space/Conformal Field Theory (AdS/CFT) correspondence has provided new and useful insights into the non-perturbative regime of strongly coupled gauge theories. We construct a class of models meant to mimic Yang-Mills theory using the ... More
Constraining Transfer Cross Sections Using Bayes' TheoremJan 18 2018Being able to rigorously quantify the uncertainties in reaction models is crucial to moving this field forward. Even though Bayesian methods are becoming increasingly popular in nuclear theory, they are yet to be implemented and applied in reaction theory ... More
Open bottom mesons in asymmetric nuclear matter in presence of strong magnetic fieldsJan 18 2018The modifications of the masses of the $B$ and $\bar B$ mesons in asymmetric nuclear matter in the presence of strong magnetic fields, are investigated using a chiral effective model. The medium modifications of these open bottom mesons arise due to their ... 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
Influence of the coupling constant of $Δ$ to $δ$ meson on isospin dependent in-medium $\mbox{NN}\to \mbox{N}Δ$ cross sectionJan 18 2018The isospin dependent in-medium $NN\rightarrow N\Delta$ cross sections in isospin asymmetric nuclear matter are investigated within the framework of the one boson exchange model with the $\delta$ meson taken into account. The influence of the coupling ... More
Resonance properties including asymptotic normalization coefficients deduced from phase-shift data without the effective-range functionJan 18 2018Recently a new $\Delta$-method for the calculation of asymptotic normalization coefficients (ANC) from phase-shift data has been formulated, proved and used for bound states. This method differs from the conventional one by fitting only the nuclear part ... 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
Cloud Quantum Computing of an Atomic NucleusJan 11 2018We report a quantum simulation of the deuteron binding energy on quantum processors accessed via cloud servers. We use a Hamiltonian from pionless effective field theory at leading order. We design a low-depth version of the unitary coupled-cluster ansatz, ... More
Applications of deep learning to relativistic hydrodynamicsJan 10 2018Relativistic hydrodynamics is a powerful tool to simulate the evolution of the quark gluon plasma (QGP) in relativistic heavy ion collisions. Using 10000 initial and final profiles generated from 2+1-d relativistic hydrodynamics VISH2+1 with MC-Glauber ... 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
Structure of $^{14}$N nucleus within a five-cluster modelJan 04 2018The spatial structure of $^{14}$N nucleus is studied within a five-particle model (three $\alpha$-particles plus two nucleons). Using the variational approach with Gaussian bases, the ground-state energy and wave function are calculated for this five-particle ... 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.
Energy Dependent Prompt Neutron Multiplicity Parameterization for Actinide PhotofissionJan 03 2018The prompt neutron averaged number and the dependence of prompt neutron yield on fragment mass {\nu}(A) of photofission of actinide nuclei 235U and 238U in the giant dipole resonance energy range has been parameterized. This allows us to describe the ... 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
Large-scale exact diagonalizations reveal low-momentum scales of nucleiDec 28 2017Ab initio methods aim to solve the nuclear many-body problem with controlled approximations. Virtually exact numerical solutions for realistic interactions can only be obtained for certain special cases such as few-nucleon systems. Here we extend the ... More
High-energy $μ^+μ^-$ electroproductionDec 28 2017The cross sections of high-energy $\mu^+\mu^-$ pair production and paradimuonium production by a relativistic electron in the atomic field are discussed. The calculation is performed exactly in the parameters of the atomic field. Though the Coulomb corrections ... More
Effects of composite pions on the chiral condensate within the PNJL model at finite temperatureDec 26 2017Jan 15 2018We investigate the effect of composite pions on the behaviour of the chiral condensate at finite temperature within the Polyakov-loop improved NJL model. To this end we treat quark-antiquark correlations in the pion channel (bound states and scattering ... 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
Interplay between isoscalar and isovector correlations in neutron-rich nucleiDec 26 2017The interplay between isoscalar and isovector correlations in the 1$^{-}$ states in neutron-rich (N$\neq$Z) even-even nuclei is studied, taking examples of the nuclei, $^{22}_{8}$O$_{14}$ and $^{24}_{8}$O$_{16}$. The excitation modes explored are isovector ... More
Neutron Transfer Reactions for Deformed Nuclei Using Sturmian Basis StatesDec 23 2017We study the spin-parity distribution P(J$^{\pi}$,E) of $^{156}$Gd excited states above the neutron separation energy $S_{n}=8.536$ MeV \cite{156Gd_list_of_levels} that are expected to be populated via the 1-step neutron pickup reaction $^{157}$Gd($^{3}$He,$^{4}$He)$^{156}$Gd. ... More
Beyond the 2-Body Interaction Paradigm: The Case for Extended A-Body Paring Interaction in NucleiDec 23 2017We discuss modeling of nuclear structure beyond the 2-body interaction paradigm. Our first example is related to the need of three nucleon contact interaction terms suggested by chiral perturbation theory. The relationship of the two low-energy effective ... More
Analysis and Monte Carlo Modelling of Multiple Scattering of a Beam of Neutrons or Photons off of the Two Surfaces of a Broad Material Target as a Function of its ThicknessDec 22 2017We consider the scattering of neutrons and photons on solid volume rectangular targets. It is common to treat this problem using the Maxwell Boltzmann Transport Equation and to use underlying symmetries to simplify the calculation. For isotropic scattering ... More
Fine-tuning in scalar meson decay with bound-state correctionsDec 22 2017The glueball-quarkonia mixture decay amplitude has been evaluated, in the literature, by diagrammatic techniques for drawing quark lines and the quark-gluon vertex. In this paper we use an alternative approach which consists in a mapping technique, the ... More
Model of multiple Dirac eikonal scattering of protons by nucleiDec 22 2017The model of multiple Dirac eikonal scattering of incident proton by target-nucleus nucleons is developed, in which new expressions for the elastic $pA$-scattering amplitudes are obtained from the multiple scattering Watson series with employing the eikonal ... More
Mass sensitivity of the three-flavor chiral phase transitionDec 21 2017The mass sensitivity of the chiral phase transition of QCD with and without axial $U_A(1)$-symmetry breaking at vanishing and finite quark chemical potential is investigated. To focus on the low-energy sector of QCD, a quark-meson model with three dynamical ... More
Medium effects on freeze-out of light clusters at NICA energiesDec 20 2017We estimate the chemical freeze-out of light nuclear clusters for NICA energies of above 2 A GeV. On the one hand we use results from the low energy domain of about 35 A MeV, where medium effects have been shown to be important to explain experimental ... 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
Nonlinear diffusion in relativistic heavy-ion collisions?Nov 30 2017The nonequilibrium-statistical Relativistic Diffusion Model (RDM) is investigated in a generalized version with a nonlinear diffusion term. Broad rapidity distributions encountered in relativistic heavy-ion data for stopping and particle production at ... 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
Baryons in the plasma: in-medium effects and parity doublingOct 02 2017We investigate the fate of baryons made out of u, d and s quarks in the hadronic gas and the quark-gluon plasma, using nonperturbative lattice simulations, employing the FASTSUM anisotropic Nf=2+1 ensembles. In the confined phase a strong temperature ... 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
Collision Energy Dependence of Moments of Net-Kaon Multiplicity Distributions at RHICSep 03 2017Fluctuations of conserved quantities such as baryon number, charge, and strangeness are sensitive to the correlation length of the hot and dense matter created in relativistic heavy-ion collisions and can be used to search for the QCD critical point. ... More
Isothermal compressibility of hadronic matter formed in relativistic nuclear collisionsAug 29 2017We present the first estimation of isothermal compressibility (\kT) of matter formed in relativistic nuclear collisions (\sNN=7.7 GeV to 2.76 TeV) using experimental observables. \kT is connected to the equation of state (EOS) of matter and along with ... More
Freezeout systematics due to the hadron spectrumAug 27 2017Nov 08 2017We investigate systematics of the freezeout surface in heavy ion collisions due to the hadron spectrum. The role of suspected resonance states that are yet to be confirmed experimentally in identifying the freezeout surface has been investigated. We have ... More
Revisiting the Hybrid Quantum Monte Carlo Method for Hubbard and Electron-Phonon ModelsAug 11 2017A unique feature of the Hybrid Quantum Monte Carlo (HQMC) method is the potential to simulate negative sign free lattice fermion models with sub-cubic scaling in system size. Here we will revisit the algorithm for various models. We will show that for ... More
Repulsive baryonic interactions and lattice QCD observables at imaginary chemical potentialAug 09 2017Oct 19 2017The first principle lattice QCD methods allow to calculate the thermodynamic observables at finite temperature and imaginary chemical potential. These can be compared to the predictions of various phenomenological models. We argue that Fourier coefficients ... More