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Nuclear Theory·nucl-th

Monday·December 15, 2014

3 papers—2 primary·1 cross-listed

All3Primary2Cross-lists1
  1. 01

    [Submitted on 12 Dec 2014]

    Beam Energy Scan a Case for the Chiral Magnetic Effect in Au-Au Collisions

    R.S. Longacre🇺🇸

    The Chiral Magnetic Effect (CME) is predicted for Au-Au collisions at RHIC. However many backgrounds can give signals that make the measurement hard to interpret. The STAR experiment has made measurements at different collisions energy ranging from =7.7 GeV to 62.4 GeV. In the analysis that is presented we show that the CME turns on with energy and is not present in central collisions where the induced magnetic is small.

    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1412.4072 [pdf]
    0 citations
  2. 02

    [Submitted on 12 Dec 2014]

    Unified description of Li structure and deuterium-He dynamics with chiral two- and three-nucleon forces

    Guillaume Hupin · Sofia Quaglioni · Petr Navrátil

    Prototype for the study of weakly bound projectiles colliding on stable targets, the scattering of deuterium () on He () is an important milestone in the search for a fundamental understanding of low-energy reactions. At the same time, it is also important for its role in the Big-bang nucleosynthesis of Li and applications in the characterization of deuterium impurities in materials. We present the first unified {\em ab initio} study of the Li ground state and -He elastic scattering using two- and three-nucleon forces derived within the framework of chiral effective field theory. The six-nucleon bound-state and scattering observables are calculated by means of the no-core shell model with continuum. %and are compared to available experimental data. We analyze the influence of the dynamic polarization of the deuterium and of the chiral three-nucleon force, and examine the role of the continuum degrees of freedom in shaping the low-lying spectrum of Li. We find that the adopted Hamiltonian correctly predicts the binding energy of Li, yielding an asymptotic - to -state ratio of the Li wave function in configuration of in agreement with the value determined from a phase shift analysis of Li+He elastic scattering, but overestimates the excitation energy of the first state by keV. The bulk of the computed differential cross section is in good agreement with data.

    Comments:
    5 pages, 5 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1412.4101 [pdf]
    PRL(2015)·58 citations
  3. 03

    [Submitted on 3 Dec 2014] (cross-list from hep-th)

    Effective Temperature of Non-equilibrium Dense Matter in Holography

    Hironori Hoshino🇯🇵 · Shin Nakamura🇯🇵

    We study properties of effective temperature of non-equilibrium steady states by using the anti-de Sitter spacetime/conformal field theory (AdS/CFT) correspondence. We consider non-equilibrium systems with a constant flow of current along an electric field, in which the current is carried by both the doped charges and those pair created by the electric field. We find that the effective temperature agrees with that of the Langevin systems if we take the limit where the pair creation is negligible. The effect of pair creation raises the effective temperature whereas the current by the doped charges contributes to lower the effective temperature in a wide range of the holographic models.

    Comments:
    18 pages, 7 figures
    Subjects:
    High Energy Physics — Theory (hep-th); Statistical Mechanics (cond-mat.stat-mech); Nuclear Theory (nucl-th)
    arXiv:
    1412.1319 [pdf]
    PRD(2015)·7 citations

Affiliations

first authorsco-authorsvia INSPIRE