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Nuclear Theory·nucl-th

Tuesday·July 17, 2018

25 papers—18 primary·7 cross-listed

All25Primary18Cross-lists7
  1. 19

    [Submitted on 13 Jul 2018] (cross-list from quant-ph)

    Improved effective-range expansions for small and large values of scattering length

    S K Adhikari🇧🇷

    The textbook effective-range expansion of scattering theory is useful in the analysis of low-energy scattering phenomenology when the scattering length is much larger than the range of the scattering potential: . Nevertheless, the same has been used for systems where the scattering length is much smaller than the range of the potential, which could be the case in many scattering problems. We suggest and numerically study improved two-parameter effective-range expansions for the cases and . The improved effective-range expansion for reduces to the textbook expansion for .

    Subjects:
    Quantum Physics (quant-ph); Quantum Gases (cond-mat.quant-gas); Nuclear Theory (nucl-th); Atomic Physics (physics.atom-ph)
    arXiv:
    1807.05208 [pdf]
    Eur.J.Phys.(2018)·8 citations
  2. 20

    [Submitted on 15 Jul 2018] (cross-list from hep-ph)

    Chiral Magnetic Effect in Isobaric Collisions from Anomalous-Viscous Fluid Dynamics (AVFD)

    Shuzhe Shi🇺🇸 · Hui Zhang🇨🇳 · Defu Hou🇨🇳 · Jinfeng Liao🇺🇸

    The isobaric collision experiment at RHIC provides the unique opportunity to detect the possible signal of Chiral Magnetic Effect (CME) in heavy ion collisions. The idea is to contrast the correlation observables of the two colliding systems that supposedly have identical flow-driven background contributions while quite different CME signal contributions due to the 10% variation in their nuclear charge and thus magnetic field strength. With the recently developed quantitative simulation tool for computing CME signal, the Anomalous-Viscous Fluid Dynamics (AVFD), we demonstrate that a joint (multiplicity + elliptic-flow) event selection is crucial for this purpose. We further propose to use the absolute difference between RuRu and ZrZr events (after using identical event selection) for detecting CME signal and make predictions for the correlation observables.

    Comments:
    4 pages, 3 figures, contribution to QM2018 conference proceedings
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1807.05604 [pdf]
    NPA(2019)·11 citations
  3. 21

    [Submitted on 16 Jul 2018] (cross-list from cond-mat.quant-gas)

    Pairing of the Pöschl-Teller gas

    Hsuan-Hao Fan🇺🇸 · E. Krotscheck🇺🇸

    We report calculations of equation of state of a model system, representative for a cold Fermi gas, of particles interacting via the Pöschl-Teller interaction. In successively more sophisticated calculations, we determine the importance of correlations and non-localities. We show that the gas displays, at relatively low density, an instability indicated by a divergence of the in-medium scattering length which occurs well before the divergence of the vacuum scattering length and the spinodal density. We also calculate the pairing gap and show that non-local correlations can change the pairing gap by almost an order of magnitude.

    Comments:
    9 pages, 2 figures, QFS 2018 in Tokyo
    Subjects:
    Quantum Gases (cond-mat.quant-gas); Strongly Correlated Electrons (cond-mat.str-el); Superconductivity (cond-mat.supr-con); Nuclear Theory (nucl-th); Quantum Physics (quant-ph)
    arXiv:
    1807.05643 [pdf]
    J.Low Temp.Phys.(2019)·1 citation
  4. 22

    [Submitted on 16 Jul 2018] (cross-list from hep-ph)

    Unified framework for heavy flavor and quarkonium production in high multiplicity p+p and p+A collisions at RHIC and LHC

    Yan-Qing Ma🇨🇳 · Prithwish Tribedy🇺🇸 · Raju Venugopalan🇺🇸 · Kazuhiro Watanabe🇺🇸

    We discuss the production of -mesons and in high multiplicity proton-proton and proton-nucleus collisions within the Color-Glass-Condensate (CGC) framework. We demonstrate that the modification of the LHC data on and yields in high multiplicity events relative to minimum bias events arise from a significant enhancement of the gluon saturation scales of the corresponding rare parton configurations in the colliding protons and nuclei. For a given event multiplicity, we predict these relative yields to be energy independent from GeV at RHIC to the highest LHC energies.

    Comments:
    4 pages 3 figures, proceedings of Quark Matter 2018, Venice, Italy, May 13-19 2018
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1807.05655 [pdf]
    NPA(2019)·3 citations
  5. 23

    [Submitted on 16 Jul 2018] (cross-list from hep-ph)

    Correlated gluonic hot spots meet symmetric cumulants data at LHC energies

    Javier L. Albacete🇪🇸 · Harri Niemi🇩🇪 · Hannah Petersen🇩🇪 · Alba Soto-Ontoso🇪🇸

    We present a systematic study on the influence of spatial correlations between the proton constituents, in our case gluonic hot spots, their size and their number on the symmetric cumulant SC(2,3), at the eccentricity level, within a Monte Carlo Glauber framework [1]. When modeling the proton as composed by 3 gluonic hot spots, the most common assumption in the literature, we find that the inclusion of spatial correlations is indispensable to reproduce the negative sign of SC(2,3) in the highest centrality bins as dictated by data. Further, the subtle interplay between the different scales of the problem is discussed. To conclude, the possibility of feeding a 2+1D viscous hydrodynamic simulation with our entropy profiles is exposed.

    Comments:
    4 pages, 3 figures, talk by A.Soto-Ontoso at the Quark Matter 2018 conference
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    1807.05866 [pdf]
    NPA(2019)·2 citations
  6. 24

    [Submitted on 16 Jul 2018] (cross-list from hep-ph)

    Testing coalescence and statistical-thermal production scenarios for (anti-)(hyper-)nuclei and exotic QCD objects at energies available at the CERN Large Hadron Collider

    Francesca Bellini🇨🇭 · Alexander Philipp Kalweit🇨🇭

    We present a detailed comparison of coalescence and thermal-statistical models for the production of (anti-)(hyper-)nuclei in high-energy collisions. For the first time, such a study is carried out as a function of the size of the object relative to the size of the particle emitting source. Our study reveals large differences between the two scenarios for the production of objects with extended wave-functions. While both models give similar predictions and show similar agreement with experimental data for (anti-)deuterons and (anti-)3He nuclei, they largely differ in their description of (anti-)hyper-triton production. We propose to address experimentally the comparison of the production models by measuring the coalescence parameter systematically for different (anti-)(hyper-)nuclei in different collision systems and differentially in multiplicity. Such measurements are feasible with the current and upgraded Large Hadron Collider experiments. Our findings highlight the unique potential of ultra-relativistic heavy-ion collisions as a laboratory to clarify the internal structure of exotic QCD objects and can serve as a basis for more refined calculations in the future.

    Comments:
    Updated to journal version, t/3He ratio included. 20 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1807.05894 [pdf]
    PRC(2019)·114 citations
  7. 25

    [Submitted on 16 Jul 2018] (cross-list from hep-th)

    Quantum Kinetic Equation in the Rotating Frame and Chiral Kinetic Theory

    Omer F. Dayi🇹🇷 · Eda Kilincarslan🇹🇷

    A modified quantum kinetic equation which takes account of the noninertial features of rotating frame is proposed. The vector and axial-vector field components of the Wigner function for chiral fluids are worked out in a semiclassical scheme. It is demonstrated that the chiral currents and energy-momentum tensor computed by means of them are consistent with the hydrodynamical results. A new semiclassical covariant chiral transport equation is established by inspecting the equations satisfied by the chiral vector fields. It uniquely provides a new three-dimensional semiclassical chiral kinetic theory possessing a Coriolis force term. The particle number and current densities deduced from this transport equation satisfy the anomalous continuity equation and generate the magnetic and vortical effects correctly.

    Comments:
    Some comments and references added
    Subjects:
    High Energy Physics — Theory (hep-th); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Nuclear Theory (nucl-th)
    arXiv:
    1807.05912 [pdf]
    PRD(2018)·24 citations

Affiliations

first authorsco-authorsvia INSPIRE