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Nuclear Theory·nucl-th

Monday·January 15, 2018

8 papers—1 primary·7 cross-listed

All8Primary1Cross-lists7
  1. 02

    [Submitted on 10 Jan 2018] (cross-list from nucl-ex)

    PHENIX results on three-particle Bose-Einstein correlations in GeV Au+Au collisions

    Tamás Novák🇭🇺

    Bose-Einstein correlations of identical hadrons reveal information about hadron creation from the strongly interacting matter formed in ultrarelativistic heavy ion collisions. The measurement of three-particle correlations may in particular shed light on hadron creation mechanisms beyond thermal/chaotic emission. In this paper we show the status of PHENIX measurements of three pion correlations as a function of momentum differences within the triplets. We analyze the shape of the correlation functions through the assumption of Lévy sources and a proper treatment of the Coulomb interaction within the triplets. We measure the three-particle correlation strength (), which, together with the two-particle correlation strength , encodes information about hadron creation mechanisms. From a consistent analysis of two- and three-particle correlation strength we establish a new experimental measure of thermalization and coherence in the source.

    Subjects:
    Nuclear Experiment (nucl-ex); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
    arXiv:
    1801.03544 [pdf]
    Universe(2018)·8 citations
  2. 03

    [Submitted on 11 Jan 2018] (cross-list from hep-ph)

    Strong and radiative decays of D\Xi molecular state and newly observed states

    Yin Huang🇨🇳 · Cheng-jian Xiao🇨🇳 · Qi Fang Lü🇨🇳 · Rong Wang🇫🇷 · Jun He🇨🇳 · Lisheng Geng🇨🇳

    In this work, we study strong and radiative decays of S-wave D\Xi molecular state, which is related to the \Omega^*_c states newly observed at LHCb. The coupling between the D\Xi molecular state and its constituents D and \Xi is calculated by using the compositeness condition. With the obtained coupling, the partial decay widths of the D\Xi molecular state into the \Xi_c^{+}K^{-}, \Xi^{'+}_cK^{-} and \Omega^{*}_c(2695)\gamma final states through hadronic loop are calculated with the help of the effective Lagrangians. By comparison with the LHCb observation, the current results of total decay width support the \Omega^{*}_c(3119) or \Omega^{*}_c(3050) as D\Xi molecule while the the decay width of the \Omega^{*}_c(3000), \Omega^{*}_c(3066) and \Omega^{*}_c(3090) can not be well reproduced in the molecular state picture. The partial decay widths are also presented and helpful to further understand the internal structures of \Omega^{*}_c(3119) and \Omega^{*}_c(3050).

    Comments:
    7pages,6 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1801.03598 [pdf]
    PRD(2018)·51 citations
  3. 04

    [Submitted on 11 Jan 2018] (cross-list from hep-ph)

    Spontaneous magnetization under a pseudovector interaction between quarks in high density quark matter

    M.Morimoto (Kochi Univ., Japan)🇯🇵 · Y.Tsue (Kochi Univ., Japan)🇯🇵 · J.da Providencia (Univ.de Coimbra, Portugal)🇵🇹 · C. Providencia (Univ.de Coimbra, Portugal)🇵🇹 · M.Yamamura (Kansai Univ., Japan)🇯🇵

    Spontaneous magnetization and magnetic susceptibility originated from the pseudovector-type four-point interaction between quarks are calculated in quark matter with zero temperature and finite quark chemical potential by using the two-flavor Nambu-Jona-Lasinio model. It is shown that both the chiral condensate and spin polarized condensate coexist in a narrow region of the quark chemical potential. And then, it is also shown that, in this narrow region, the spontaneous magnetization appears. Also, the magnetic susceptibility due to quarks with the positive energy is evaluated in the spin polarized phase.

    Comments:
    15 pages, 2 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1801.03633 [pdf]
    IJMPE(2018)·12 citations
  4. 05

    [Submitted on 11 Jan 2018] (cross-list from hep-th)

    Complete and Consistent Chiral Transport from Wigner Function Formalism

    Anping Huang🇨🇳 · Shuzhe Shi🇺🇸 · Yin Jiang🇨🇳 · Jinfeng Liao🇺🇸 · Pengfei Zhuang🇨🇳

    Recently there has been significant interest in understanding the macroscopic quantum transport in a many-body system of chiral fermions. A natural framework for describing such a system which is generally out of equilibrium, is the transport equation for its phase space distribution function. In this paper, we obtain a complete solution of the covariant chiral transport for massless fermions, by starting from the general Wigner function formalism and carrying out a complete and consistent semiclassical expansion up to order. In particular, we clarify certain subtle and confusing issues surrounding the Lorentz non-invariance and frame dependence associated with the 3D chiral kinetic theory. We prove that such frame dependence is uniquely and completely fixed by an unambiguous definition of the correction to the distribution function in each reference frame.

    Subjects:
    High Energy Physics — Theory (hep-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    1801.03640 [pdf]
    PRD(2018)·145 citations
  5. 06

    [Submitted on 11 Jan 2018] (cross-list from nucl-ex)

    The Compression-Mode Giant Resonances and Nuclear Incompressibility

    Umesh Garg · Gianluca Colò

    The compression-mode giant resonances, namely the isoscalar giant monopole and isoscalar giant dipole modes, are examples of collective nuclear motion. Their main interest stems from the fact that one hopes to extrapolate from their properties the incompressibility of uniform nuclear matter, which is a key parameter of the nuclear Equation of State (EoS). Our understanding of these issues has undergone two major jumps, one in the late 1970s when the Isoscalar Giant Monopole Resonance (ISGMR) was experimentally identified, and another around the turn of the millennium since when theory has been able to start giving reliable error bars to the incompressibility. However, mainly magic nuclei have been involved in the deduction of the incompressibility from the vibrations of finite nuclei. The present review deals with the developments beyond all this. Experimental techniques have been improved, and new open-shell, and deformed, nuclei have been investigated. The associated changes in our understanding of the problem of the nuclear incompressibility are discussed. New theoretical models, decay measurements, and the search for the evolution of compressional modes in exotic nuclei are also discussed.

    Comments:
    Review paper to appear in "Progress in Particle and Nuclear Physics"
    Subjects:
    Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1801.03672 [pdf]
    PPNP(2018)·273 citations
  6. 07

    [Submitted on 11 Jan 2018] (cross-list from quant-ph)

    Cloud Quantum Computing of an Atomic Nucleus

    E. F. Dumitrescu🇺🇸 · A. J. McCaskey🇺🇸 · G. Hagen🇺🇸 · G. R. Jansen🇺🇸 · T. D. Morris🇺🇸 · T. Papenbrock🇺🇸 · R. C. Pooser🇺🇸 · D. J. Dean🇺🇸 · P. Lougovski🇺🇸

    We report a quantum simulation of the deuteron binding energy on quantum processors accessed via cloud servers. We use a Hamiltonian from pionless effective field theory at leading order. We design a low-depth version of the unitary coupled-cluster ansatz, use the variational quantum eigensolver algorithm, and compute the binding energy to within a few percent. Our work is the first step towards scalable nuclear structure computations on a quantum processor via the cloud, and it sheds light on how to map scientific computing applications onto nascent quantum devices.

    Subjects:
    Quantum Physics (quant-ph); Nuclear Theory (nucl-th)
    arXiv:
    1801.03897 [pdf]
    PRL(2018)·428 citations
  7. 08

    [Submitted on 11 Jan 2018] (cross-list from hep-ph)

    Factorization Theorem Relating Euclidean and Light-Cone Parton Distributions

    Taku Izubuchi🇯🇵 · Xiangdong Ji🇨🇳 · Luchang Jin🇺🇸 · Iain W. Stewart🇺🇸 · Yong Zhao🇺🇸

    In a large-momentum nucleon state, the matrix element of a gauge-invariant Euclidean Wilson line operator accessible from lattice QCD can be related to the standard light-cone parton distribution function through the large-momentum effective theory (LaMET) expansion. This relation is given by a factorization theorem with a non-trivial matching coefficient. Using the operator product expansion we prove the large-momentum factorization of the quasi-parton distribution function in LaMET, and show that the more recently discussed Ioffe-time distribution approach also obeys an equivalent factorization theorem. Explicit results for the coefficients are obtained and compared at one-loop. Our proof clearly demonstrates that the matching coefficients in the scheme depend on the large partonic momentum rather than the nucleon momentum.

    Comments:
    19 pages, 4 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
    arXiv:
    1801.03917 [pdf]
    PRD(2018)·239 citations

Affiliations

first authorsco-authorsvia INSPIRE