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Nuclear Theory·nucl-th

Tuesday·January 3, 2017

9 papers—2 primary·7 cross-listed

All9Primary2Cross-lists7
  1. 01

    [Submitted on 31 Dec 2016]

    Forward-backward multiplicity correlations at the LHC from independent sources

    Adam Olszewski🇵🇱 · Wojciech Broniowski🇵🇱

    It is argued that the superposition approach, where partons are independently emitted from longitudinally extended sources in the early stage, is fully compatible with the experimental results for the forward-backward multiplicity correlations in Pb+Pb collisions at . The pertinent correlation analysis is based on the PhD Thesis of Ref. [1], which includes an unpublished analysis of data taken by the ALICE Collaboration. Our calculations show that in the experimentally covered pseudorapidity range , the initial sources in the backward and forward bins are maximally correlated, which complies to the string-like interpretation of the underlying early-stage production mechanism.

    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1701.00099 [pdf]
    Acta Phys.Polon.B(2017)·1 citation
  2. 02

    [Submitted on 1 Jan 2017]

    Exit-Channel Suppression in Statistical Reaction Theory

    G.F. Bertsch · T. Kawano

    Statistical reaction theories such as Hauser-Feshbach assume that branching ratios follow Bohr's compound nucleus hypothesis by factorizing into independent probabilities for different channels. Corrections to the factorization hypothesis are known in both nuclear theory and quantum transport theory, particularly an enhanced memory of the entrance channel. We apply the Gaussian orthogonal ensemble to study a complementary suppression of exit channel branching ratios. The effect can be large enough to provide information on the number of exit channels. The effect is demonstrated for the branching ratios of neutron-induced reactions on a U target.

    Comments:
    8 pages, 1 Figure, to be published in Physical Review Letters
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1701.00276 [pdf]
    PRL(2017)·7 citations

Affiliations

first authorsco-authorsvia INSPIRE