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Nuclear Theory·nucl-th

Friday·October 5, 2018

9 papers—5 primary·4 cross-listed

All9Primary5Cross-lists4
  1. 01

    Net-baryon multiplicity distribution consistent with lattice QCD

    Adam Bzdak🇵🇱 · Volker Koch🇺🇸

    We determine the net-baryon multiplicity distribution which reproduces all cumulants measured so far by lattice QCD. We present the dependence on the volume and temperature of this distribution. We find that for temperatures and volumes encountered in heavy ion reactions, the multiplicity distribution is very close to the Skellam distribution, making the experimental determination of it rather challenging. We further provide estimates for the statistics required to measure cumulants of the net-baryon and net-proton distributions.

    nucl-thhep-exhep-phnucl-exPRC(2019)·6 citations
  2. 02

    New Results on Three-Nucleon Short-Range Correlations

    Misak Sargsian🇺🇸

    The recent progress in studies of two-nucleon~(2N) short-range correlations~(SRCs) are reviewed with the main emphasize given to the observation of the strong dominance of proton-neutron~(pn) SRCs in nuclei as compared to proton-proton and neutron-neutron SRCs. Based on the pn SRC dominance a specific prediction is made for the dynamical structure of 3N- SRCs for inclusive reactions, according to which the 3N- SRCs are generated through the sequence of two short range interactions. This allowed us to predict that the height of the plateau in the ratios of inclusive eA cross sections to that of in the 3N-SRC region is related to the height of the plateau in the 2N-SRC region by a quadratic relation. The analysis of the available experimental data supports validity of such a relation.

    nucl-th0 citations
  3. 03

    The chiral vortical effect in Wigner function approach

    Jian-hua Gao🇨🇳 · Jin-yi Pang🇩🇪 · Qun Wang🇨🇳

    It is more subtle to obtain the chiral vortical effect (CVE) than chiral magnetic effect (CME) in quantum transport approach. To investigate the subtlty of the CVE we present two different derivation in the Wigner function approach. The first one is based on the method in our previous work \cite{Gao:2012ix} in which the CVE was derived under static-equilibrium conditions without details. We provide a detailed derivation using a more transparent and powerful method, which can be easily generalized to higher order calculation. In this derivation of the CVE current, there is an explicit Lorentz covariance. The second derivation is based on a more general chiral kinetic theory in a semi-classical expansion of the Wigner function without assuming static-equilibrium conditions \cite{Gao:2018wmr}. In this derivation, there is a freedom to choose a reference frame for the CVE current, so the explicit Lorentz covariance seems to be lost. Howerver, under static-equilibrium conditions, we show that the CVE current in this derivation can be decomposed into two parts, identified as the normal and magnetization current. Each part depends on the reference frame, but the sum of two parts does give the total CVE current which is independent of the reference frame. In the comoving frame of the fluid, it can be shown that the normal and magnetization current give one-third and two-thirds of the total CVE current respectively. This gives a natural solution to the 'one-third' puzzle in the CVE current in three-dimensional version of the chiral kinetic theory in the literature.

    nucl-thPRD(2019)·46 citations
  4. 04

    Nucleon-nucleon interaction in a chiral SU(3) quark model revisited

    F. Huang🇨🇳 · W. L. Wang🇨🇳

    A dynamical investigation of the nucleon-nucleon (NN) interaction by using the resonating group method (RGM) in a chiral SU(3) quark model has been revisited. The considered quark-quark interaction includes, besides the one-gluon exchange (OGE) and the phenomenological confinement potential, the nonet scalar and pseudoscalar meson exchanges derived from the spontaneous SU(3) chiral symmetry breaking. The physical consistency requirement that the wave functions of single baryons satisfy the minimums of the Hamiltonian has been strictly imposed in determination of the model parameters. The calculated masses of the octet and decuplet baryon ground states, the binding energy of the deuteron, and the NN scattering phase shifts up to a total angular momentum J=6 are in satisfactory agreement with the experiments.

    nucl-thhep-phPRD(2018)·28 citations
  5. 05

    Mansour three body force applied to nuclear matter

    Hesham Mansour

    In the present work we are going to add a correction to the BHF potential calculation by introducing a two- body density dependent potential that acts as a three body interaction. Adding the result of this potential to the BHF potential would give us new saturation curves which coincide with the results obtained from the experiment. We compute the energy per particle versus density curves for symmetric nuclear matter, pure neutron matter and the symmetry energy using modern nucleon nucleon potentials like CD Bonn.

    nucl-th0 citations

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