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Nuclear Theory·nucl-th

Monday·January 26, 2015

6 papers—4 primary·2 cross-listed

All6Primary4Cross-lists2
  1. 01

    [Submitted on 22 Jan 2015]

    Neutron Matter from Low to High Density

    Stefano Gandolfi🇺🇸 · Alexandros Gezerlis🇨🇦 · J. Carlson🇺🇸

    Neutron matter is an intriguing nuclear system with multiple connections to other areas of physics. Considerable progress has been made over the last two decades in exploring the properties of pure neutron fluids. Here we begin by reviewing work done to explore the behavior of very low density neutron matter, which forms a strongly paired superfluid and is thus similar to cold Fermi atoms, though at energy scales differing by many orders of magnitude. We then increase the density, discussing work that ties the study of neutron matter with the determination of the properties of neutron-rich nuclei and neutron-star crusts. After this, we review the impact neutron matter at even higher densities has on the mass-radius relation of neutron stars, thereby making contact with astrophysical observations.

    Comments:
    30 pages, 11 figures; prepared for Annual Review of Nuclear and Particle Science
    Subjects:
    Nuclear Theory (nucl-th); Solar and Stellar Astrophysics (astro-ph.SR); Quantum Gases (cond-mat.quant-gas); Nuclear Experiment (nucl-ex)
    arXiv:
    1501.05675 [pdf]
    Ann.Rev.Nucl.Part.Sci.(2015)·169 citations
  2. 02

    [Submitted on 23 Jan 2015]

    Extraction of Neutrino Flux from the Inclusive Muon Cross Section

    Tomoya Murata🇯🇵 · Toru Sato🇯🇵

    We have studied a method to extract neutrino flux from the data of neutrino-nucleus reaction by using maximum entropy method. We demonstrate a promising example to extract neutrino flux from the inclusive cross section of muon production without selecting a particular reaction process such as quasi-elastic nucleon knockout.

    Comments:
    7 pages, 4 figures, 1 table. Talk presented by TM at the International Workshop on Neutrino Factories and Future Neutrino Facilities (NUFACT 2014), August 25-30 2014, Glasgow, UK
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1501.05741 [pdf]
    PoS(2015)·0 citations
  3. 03

    [Submitted on 23 Jan 2015]

    Exotic atoms and exotic nuclei

    S. Hirenzaki🇯🇵 · H. Nagahiro🇯🇵 · N. Ikeno🇯🇵 · J. Yamagata-Sekihara🇯🇵

    We briefly review the study of the exotic atoms and exotic nuclei, and report recent research activities of eta-mesic nucleus and kaonic atoms in this article.

    Comments:
    6 pages, 2 figures. Talk given at II Symposium on applied nuclear physics and innovative technologies, Jagiellonian University, Krakow, Poland, Acta Physica Polonica B (2015) in press
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1501.05748 [pdf]
    Acta Phys.Polon.B(2015)·4 citations
  4. 04

    [Submitted on 23 Jan 2015]

    On growth of spinodal instabilities in nuclear matter

    O. Yilmaz · S. Ayik · F. Acar · A. Gokalp

    Early growth of density fluctuations of nuclear matter in spinodal region is investigated employing the stochastic mean-field approach. In contrast to the earlier treatments in which only collective modes were included in the calculations, in the present work non-collective modes are also included, thus providing a complete treatment of the density correlation functions. Calculations are carried out for symmetric matter in non-relativistic framework using a semi-classical approximation.

    Comments:
    19 pages, 10 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1501.05785 [pdf]
    PRC(2015)·5 citations
  5. 05

    [Submitted on 23 Jan 2015] (cross-list from hep-ph)

    Top-quark production in proton-nucleus and nucleus-nucleus collisions at LHC energies and beyond

    David d'Enterria🇨🇭 · Krisztian Krajczar🇨🇭 · Hannu Paukkunen🇫🇮

    Single and pair top-quark production in proton-lead (p-Pb) and lead-lead (Pb-Pb) collisions at the CERN Large Hadron Collider (LHC) and future circular collider (FCC) energies, are studied with next-to-leading-order perturbative QCD calculations including nuclear parton distribution functions. At the LHC, the pair-production cross sections amount to sigma(t-tbar) = 3.4 mub in Pb-Pb at sqrt(s) = 5.5 TeV, and sigma(t-tbar) = 60 nb in p-Pb at sqrt(s) = 8.8 TeV. At the FCC energies of sqrt(s) = 39 and 63 TeV, the same cross sections are factors of 90 and 55 times larger respectively. In the leptonic final-state t-tbar --> W+b W-bbar --> b bbar l+l- nu+nu-, after typical acceptance and efficiency cuts, one expects about 90 and 300 top-quarks per nominal LHC-year and 4.7 10^4 and 10^5 per FCC-year in Pb-Pb and p-Pb collisions respectively. The total t-tbar cross sections, dominated by gluon fusion processes, are enhanced by 3--8% in nuclear compared to p-p collisions due to an overall net gluon antishadowing, although different regions of their differential distributions are depleted due to shadowing or EMC-effect corrections. The rapidity distributions of the decay leptons in t-tbar processes can be used to reduce the uncertainty on the Pb gluon density at high virtualities by up to 30% at the LHC (full heavy-ion programme), and by 70% per FCC-year. The cross sections for single-top production in electroweak processes are also computed, yielding about a factor of 30 smaller number of measurable top-quarks after cuts, per system and per year.

    Comments:
    14 pages, 5 figs. Minor modifications. Version to appear in Phys.Lett.B
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1501.05879 [pdf]
    PLB(2015)·61 citations
  6. 06

    [Submitted on 19 Jan 2015] (cross-list from cond-mat.mtrl-sci)

    The role of correlation entropy in nuclear fusion in liquid lithium, indium and mercury

    M. Coraddu · M. Lissia · P. Quarati · A. M. Scarfone

    Nuclear fusion cross-sections considerably higher than corresponding theoretical predictions are observed in low-energy experiments with metal matrix targets and accelerated deuteron beams. The cross-section increment is significantly higher for liquid than for solid targets. We propose that the same two-body correlation entropy used in evaluating the metal melting entropy explains the large liquid-solid difference of the effective screening potential that parameterizes the cross-section increment. This approach is applied to the specific case of the Li(d,)He reaction, whose measured screening potential liquid-solid difference is eV. Cross sections in the two metals with the highest two-body correlation entropy (In and Hg) have not yet been measured: increments of the cross sections in liquid relative to the ones in solid metals are estimated with the same procedure.

    Comments:
    7 pages, no figures. Published in Journal of Physics G: Nuclear and Particle Physics
    Subjects:
    cond-mat.mtrl-sci (cond-mat.mtrl-sci); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th); Plasma Physics (physics.plasm-ph)
    arXiv:
    1501.05906 [pdf]
    J.Phys.G(2014)·0 citations

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first authorsco-authorsvia INSPIRE