PaperPanorama
FAQ

Nuclear Theory·nucl-th

Wednesday·May 17, 2017

10 papers—7 primary·3 cross-listed

All10Primary7Cross-lists3
  1. 08

    [Submitted on 15 May 2017] (cross-list from hep-ph)

    The Energy Distribution of Subjets and the Jet Shape

    Zhong-Bo Kang🇺🇸 · Felix Ringer🇺🇸 · Wouter J. Waalewijn🇳🇱

    We present a framework that describes the energy distribution of subjets of radius within a jet of radius . We consider both an inclusive sample of subjets as well as subjets centered around a predetermined axis, from which the jet shape can be obtained. For we factorize the physics at angular scales and to resum the logarithms of . For central subjets, we consider both the standard jet axis and the winner-take-all axis, which involve double and single logarithms of , respectively. All relevant one-loop matching coefficients are given, and an inconsistency in some previous results for cone jets is resolved. Our results for the standard jet shape differ from previous calculations at next-to-leading logarithmic order, because we account for the recoil of the standard jet axis due to soft radiation. Numerical results are presented for an inclusive subjet sample for at next-to-leading order plus leading logarithmic order.

    Comments:
    39 pages, 7 figures, v2: journal version
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1705.05375 [pdf]
    JHEP(2017)·74 citations
  2. 09

    [Submitted on 15 May 2017] (cross-list from nucl-ex)

    The nuclear force imprints revealed on the elastic scattering of protons with C

    A. Kumar🇨🇦 · R. Kanungo🇨🇦 · A. Calci🇨🇦 · P. Navratil🇨🇦 · A. Sanetullaev🇨🇦 · M. Alcorta🇨🇦 · V. Bildstein🇨🇦 · G. Christian🇨🇦 · B. Davids🇨🇦 · J. Dohet-Eraly🇨🇦 · J. Fallis🇨🇦 · A. T. Gallant🇨🇦 and 17 other authors

    How does nature hold together protons and neutrons to form the wide variety of complex nuclei in the universe? Describing many-nucleon systems from the fundamental theory of quantum chromodynamics has been the greatest challenge in answering this question. The chiral effective field theory description of the nuclear force now makes this possible but requires certain parameters that are not uniquely determined. Defining the nuclear force needs identification of observables sensitive to the different parametrizations. From a measurement of proton elastic scattering on C at TRIUMF and ab initio nuclear reaction calculations we show that the shape and magnitude of the measured differential cross section is strongly sensitive to the nuclear force prescription.

    Comments:
    7 pages, 6 figures
    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1705.05409 [pdf]
    PRL(2017)·29 citations
  3. 10

    [Submitted on 15 May 2017] (cross-list from nucl-ex)

    Isolating the chiral magnetic effect from backgrounds by pair invariant mass

    Jie Zhao🇺🇸 · Hanlin Li🇺🇸 · Fuqiang Wang🇺🇸

    Topological gluon configurations in quantum chromodynamics induce quark chirality imbalance in local domains, which can result in the chiral magnetic effect (CME)--an electric charge separation along a strong magnetic field. Experimental searches for the CME in relativistic heavy ion collisions via the charge-dependent azimuthal correlator () suffer from large backgrounds arising from particle correlations (e.g. due to resonance decays) coupled with the elliptic anisotropy. We propose differential measurements of the as a function of the pair invariant mass (), by restricting to high thus relatively background free, and by studying the dependence to separate the possible CME signal from backgrounds. We demonstrate by model studies the feasibility and effectiveness of such measurements for the CME search.

    Comments:
    16 preprint pages 5 figures. v2: added a test with a broad "instanton/sphaleron" peak, and added clarifying texts; v3: added event-shape engineering (and two new figures) and expanded discussions on the low invariant mass region; v4: repeated cautionary discussions in introduction and conclusion sections, published version
    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1705.05410 [pdf]
    EPJC(2019)·56 citations

Affiliations

first authorsco-authorsvia INSPIRE