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Nuclear Theory·nucl-th

Monday·September 4, 2017

5 papers—3 primary·2 cross-listed

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  1. 04

    [Submitted on 1 Sept 2017] (cross-list from nucl-ex)

    Examination of evidence for collinear cluster tri-partition

    Yu.V. Pyatkov · D.V. Kamanin · A.A. Alexandrov · I.A. Alexandrova · Z.I. Goryainova · V. Malaza · N. Mkaza · E.A. Kuznetsova · A.O. Strekalovsky · O.V. Strekalovsky · V.E. Zhuchko

    In a series of the experiments at different time-of-flight spectrometers of heavy ions we have observed manifestations of a new at least ternary decay channel of low excited heavy nuclei. Due to specific features of the effect, it was called collinear cluster tri-partition (CCT). The experimental results obtained initiated a number of theoretical articles dedicated to different aspects of the CCT. We compare theoretical predictions with our experimental data, only partially published so far. The model of one of the most populated CCT modes that gives rise to the so called "Ni-bump" is discussed. Detection of the 68-72Ni fission fragments with a kinetic energy E<25 MeV at the mass-separator Lohengrin is proposed for an independent experimental verification of the CCT.

    Comments:
    16 pages, 14 figures
    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1709.00170 [pdf]
    PRC(2017)·27 citations
  2. 05

    [Submitted on 1 Sept 2017] (cross-list from hep-ph)

    Update on extraction of transversity PDF from inclusive di-hadron production

    Marco Radici🇮🇹

    The transversity was recently extracted from data on the production of hadron pairs in semi-inclusive deep-inelastic scattering. This analysis can be conveniently performed in the framework of collinear factorization where the elementary mechanism is represented by the simple product of transversity and of a suitable chiral-odd function describing the fragmentation of a transversely polarized parton into a pair of hadrons inside the same current jet. The same elementary mechanism was predicted long ago to generate an asymmetry in the azimuthal distribution of the hadron pairs when they are produced in proton-proton collisions with one transversely polarized proton. Recently, the STAR Collaboration has observed this asymmetry. We analyze the impact of these data on our knowledge of transversity and we present its first preliminary extraction from a global fit of all data in hard processes with inclusive di-hadron production.

    Comments:
    7 pages, 2 multiple figures, PoS style, adapted from the proceedings of the XXV International Workshop on Deep-Inelastic Scattering and Related Subjects, 3-7 April 2017, Univ. of Birmingham (UK)
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1709.00360 [pdf]
    PoS(2018)·0 citations

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first authorsco-authorsvia INSPIRE