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Nuclear Theory·nucl-th

Friday·September 9, 2016

7 papers—4 primary·3 cross-listed

All7Primary4Cross-lists3
  1. 05

    [Submitted on 7 Sept 2016] (cross-list from astro-ph.HE)

    X-ray bounds on the r-mode amplitude in millisecond pulsars

    Kai Schwenzer · Tuğba Boztepe · Tolga Güver · Eda Vurgun

    r-mode astroseismology provides a unique way to study the internal composition of compact stars. Due to their precise timing, recycled millisecond radio pulsars present a particularly promising class of sources. Although their thermal properties are still poorly constrained, X-ray data is very useful for astroseismology since r-modes could strongly heat a star. Using known and new upper bounds on the temperatures and luminosities of several non-accreting millisecond radio pulsars we derive bounds on the r-mode amplitude as low as and discuss the impact on scenarios for their internal composition.

    Comments:
    10 pages, 8 figures
    Subjects:
    High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); Nuclear Theory (nucl-th)
    arXiv:
    1609.01912 [pdf]
    MNRAS(2017)·18 citations
  2. 06

    [Submitted on 8 Sept 2016] (cross-list from hep-ph)

    Heavy-Meson Decay Constants: QCD Sum-Rule Glance at Isospin Breaking

    Wolfgang Lucha🇦🇹 · Dmitri Melikhov🇦🇹 · Silvano Simula🇮🇹

    QCD sum rules for decay constants of heavy mesons with or quark yield for mesons much less isospin breaking than lattice QCD but good agreement for mesons.

    Comments:
    5 pages, 2 figures, contributed to "QCD@Work 2016 - International Workshop on Quantum Chromodynamics: Theory and Experiment" (27 - 30 June 2016, Martina Franca, Italy)
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    1609.02382 [pdf]
    EPJ Web Conf.(2016)·3 citations
  3. 07

    [Submitted on 8 Sept 2016] (cross-list from hep-ph)

    Unveiling the nucleon tensor charge at Jefferson Lab: A study of the SoLID case

    Zhihong Ye · Nobuo Sato🇺🇸 · Kalyan Allada🇺🇸 · Tianbo Liu🇺🇸 · Jian-Ping Chen🇺🇸 · Haiyan Gao🇺🇸 · Zhong-Bo Kang🇺🇸 · Alexei Prokudin🇺🇸 · Peng Sun🇺🇸 · Feng Yuan🇺🇸

    Future experiments at the Jefferson Lab 12 GeV upgrade, in particular, the Solenoidal Large Intensity Device (SoLID), aim at a very precise data set in the region where the partonic structure of the nucleon is dominated by the valence quarks. One of the main goals is to constrain the quark transversity distributions. We apply recent theoretical advances of the global QCD extraction of the transversity distributions to study the impact of future experimental data from the SoLID experiments. Especially, we develop a simple strategy based on the Hessian matrix analysis that allows one to estimate the uncertainties of the transversity quark distributions and their tensor charges extracted from SoLID data simulation. We find that the SoLID measurements with the proton and the effective neutron targets can improve the precision of the u- and d-quark transversity distributions up to one order of magnitude in the range 0.05 < x < 0.6.

    Comments:
    11 pages, 3 figures, published on Physics Letters B
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1609.02449 [pdf]
    PLB(2017)·61 citations

Affiliations

first authorsco-authorsvia INSPIRE