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Nuclear Theory·nucl-th

Monday·August 6, 2018

4 papers—3 primary·1 cross-listed

All4Primary3Cross-lists1
  1. 01

    [Submitted on 3 Aug 2018]

    Time-like detonation in presence of magnetic field

    Ritam Mallick🇮🇳 · Shailendra Singh🇮🇳

    We study the effect of magnetic field in an implosion process achieved by radiation. A time-varying sinusoidal magnetic field is seen to affect the continuous transition of space-like detonation to time-like detonation at the core of implosion region. The oscillating varying magnetic field has a significant effect in increasing the volume of the time-like detonation of the core of implosion and also modify the time of the implosion process. This transition can have significant outcome both theoretically and experimentally in the areas of high energy hadronization of quark-gluon plasma (QGP) matter and Inertial Confinement Fusion efforts of fuels.

    Comments:
    9 pages, 8 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1808.01107 [pdf]
    Laser Part.Beams(2019)·0 citations
  2. 02

    [Submitted on 3 Aug 2018]

    Variational Monte Carlo method for shell-model calculations in odd-mass nuclei and restoration of symmetry

    Noritaka Shimizu🇯🇵 · Takahiro Mizusaki🇯🇵

    We investigate two kinds of extensions for the variational Monte Carlo (VMC) method with the Pfaffian in the nuclear shell-model calculations. One is the extension to odd-mass nuclei, for which we find a new Pfaffian expression of the VMC matrix elements. We can, thereby, give a unified VMC framework both for even and odd mass nuclei. The other is the extension of the variation after angular-momentum projection. We successfully implement the full angular-momentum projected trial state into the VMC method, which can provide us with the precise yrast energies. We also find a unique characteristic, namely that this angular-momentum projection in the VMC can be even "approximately" performed. This characteristic is useful not only for efficient computation but also for precise estimation of the yrast energies through the energy-variance extrapolation.

    Comments:
    10 pages, 4 figures, submitted to Phys. Rev. C
    Subjects:
    Nuclear Theory (nucl-th); Strongly Correlated Electrons (cond-mat.str-el)
    arXiv:
    1808.01122 [pdf]
    PRC(2018)·9 citations
  3. 03

    [Submitted on 3 Aug 2018]

    Assessing saturation physics explanations of collectivity in small collision systems with the IP-Jazma model

    J.L. Nagle🇺🇸 · W.A. Zajc🇨🇴

    Experimental measurements in collisions of small systems from p+p to p/d/3He+A at RHIC and the LHC reveal particle emission patterns that are strikingly similar to those observed in A+A collisions. One explanation of these patterns is the formation of small droplets of quark-gluon plasma followed by hydrodynamic evolution. A geometry engineering program was proposed [1] to investigate these emission patterns, and the experimental data from that program in p+Au, d+Au, 3He+Au collisions for elliptic and triangular anisotropy coefficients v2 and v3 follow the pattern predicted by hydrodynamic calculations [2]. One alternative approach, referred to as initial-state correlations, suggests that for small systems the patterns observed in the final-state hadrons are encoded at the earliest moments of the collision, and therefore require no final-state parton scattering or hydrodynamic evolution [3,4]. Recently, new calculations using only initial-state correlations, in the dilute-dense approximation of gluon saturation physics, reported striking agreement with the v2 patterns observed in p/d/3He+Au data at RHIC [5]. The reported results are counterintuitive and thus we aim here to reproduce some of the basic features of these calculations. In this first investigation, we provide a description of our model, IP-Jazma, and investigate its implications for saturation scales, multiplicity distributions and eccentricities, reserving for later work the analysis of momentum spectra and azimuthal anisotropies. We find that our implementation of the saturation physics model reproduces the results of the earlier calculation of the multiplicity distribution in d+Au collisions at RHIC. However, our investigations, together with existing data, call into question some of the essential elements reported in Ref. [5].

    Comments:
    16 pages, 14 figures, submitted for publication
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1808.01276 [pdf]
    PRC(2019)·35 citations

Affiliations

first authorsco-authorsvia INSPIRE