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Nuclear Theory·nucl-th

Thursday·April 14, 2016

5 papers—3 primary·2 cross-listed

All5Primary3Cross-lists2
  1. 04

    [Submitted on 12 Apr 2016] (cross-list from hep-ph)

    The interaction region of high energy protons

    I.M. Dremin🇷🇺 · S.N. White🇨🇭

    The spatial view of the interaction region of colliding high energy protons (in terms of impact parameter) is considered. It is shown that the region of inelastic collisions has a very peculiar shape. It saturates for central collisions at an energy of 7 TeV. We speculate on the further evolution with energy, which is contrasted to the "black disk" picture.

    Comments:
    9 pages, 1 figure. arXiv admin note: text overlap with arXiv:1406.2153
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1604.03469 [pdf]
    9 citations
  2. 05

    [Submitted on 13 Apr 2016] (cross-list from hep-th)

    A Rotation/Magnetism Analogy for the Quark-Gluon Plasma

    Brett McInnes🇸🇬

    In peripheral heavy ion collisions, the Quark-Gluon Plasma that may be formed often has a large angular momentum per unit energy. This angular momentum may take the form of (local) rotation. In many physical systems, rotation can have effects analogous to those produced by a magnetic field; thus, there is a risk that the effects of local rotation in the QGP might be mistaken for those of the large genuine magnetic fields which are also known to arise in these systems. Here we use the gauge-gravity duality to investigate this, and we find indeed that, with realistic parameter values, local rotation has effects on the QGP (at high values of the baryonic chemical potential) which are not only of the same kind as those produced by magnetic fields, but which can in fact be substantially larger. Furthermore, the combined effect of rotation and magnetism is to change the shape of the main quark matter phase transition line in an interesting way, reducing the magnitude of its curvature; again, local rotation contributes to this phenomenon at least as strongly as magnetism.

    Comments:
    Various clarifications, included brief discussion of finite size effects, 21 pages, 4 figures; version to appear in Nuclear Physics B
    Subjects:
    High Energy Physics — Theory (hep-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1604.03669 [pdf]
    NPB(2016)·43 citations

Affiliations

first authorsco-authorsvia INSPIRE