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Nuclear Theory·nucl-th

Wednesday·June 1, 2016

5 papers—4 primary·1 cross-listed

All5Primary4Cross-lists1
  1. 01

    [Submitted on 30 May 2016]

    Neutrino-Induced Reactions on Nuclei

    K. Gallmeister🇩🇪 · U. Mosel🇩🇪 · J. Weil🇩🇪

    Background: Long-baseline experiments such as the planned Deep Underground Neutrino Experiment (DUNE) require theoretical descriptions of the complete event in a neutrino-nucleus reaction. Since nuclear targets are used this requires a good understanding of neutrino-nucleus interactions. Purpose: Develop a consistent theory and code framework for the description of lepton-nucleus interactions that can be used to describe not only inclusive cross sections, but also the complete final state of the reaction. Methods: The Giessen-Boltzmann-Uehling-Uhlenbeck (GiBUU) implementation of quantum-kinetic transport theory is used, with improvements in its treatment of the nuclear ground state and of 2p2h interactions. For the latter an empirical structure function from electron scattering data is used as a basis. Results: Results for electron-induced inclusive cross sections are given as a necessary check for the overall quality of this approach. The calculated neutrino-induced inclusive double-differential cross sections show good agreement with data from neutrino- and antineutrino reactions for different neutrino flavors at MiniBooNE and T2K. Inclusive double-differential cross sections for MicroBooNE, NOvA, MINERvA and LBNF/DUNE are given. Conclusions: Based on the GiBUU model of lepton-nucleus descriptions a good theoretical description of inclusive electron-, neutrino- and antineutrino-nucleus data over a wide range of energies, different neutrino flavors and different experiments is now possible. Since no tuning is involved this theory and code should be reliable also for new energy regimes and target masses. \end{description}

    Comments:
    title changed, version accepted for publication in Phys. Rev. C
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Experiment (hep-ex); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1605.09391 [pdf]
    PRC(2016)·108 citations
  2. 02

    [Submitted on 30 May 2016]

    Initial state fluctuations in collisions between light and heavy ions

    Kevin Welsh🇺🇸 · Jordan Singer🇺🇸 · Ulrich W. Heinz (Ohio State)🇺🇸

    In high energy collisions involving small nuclei (p+p or x+Au collisions where x=p, d, or He) the fluctuating size, shape and internal gluonic structure of the nucleon is shown to have a strong effect on the initial size and shape of the fireball of new matter created in the collision. A systematic study of the eccentricity coefficients describing this initial fireball state for several semi-realistic models of nucleon substructure and for several practically relevant collision systems involving small nuclei is presented. The key importance of multiplicity fluctuations in such systems is pointed out. Our results show large differences from expectations based on conventional Glauber model simulations of the initial state created in such collisions.

    Comments:
    18 pages, 15 figures. Submitted to Physical Review C
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
    arXiv:
    1605.09418 [pdf]
    PRC(2016)·75 citations
  3. 03

    [Submitted on 31 May 2016]

    Hadronization conditions in relativistic nuclear collisions and the QCD pseudo-critical line

    F. Becattini (U. Florence)🇮🇹 · J. Steinheimer (FIAS Frankfurt)🇩🇪 · R. Stock (U. Frankfurt)🇩🇪 · M. Bleicher (FIAS Frankfurt)🇩🇪

    We compare the reconstructed hadronization conditions in relativistic nuclear collisions in the nucleon-nucleon centre-of-mass energy range 4.7-2760 GeV in terms of temperature and baryon-chemical potential with lattice QCD calculations, by using hadronic multiplicities. We obtain hadronization temperatures and baryon chemical potentials with a fit to measured multiplicities by correcting for the effect of post-hadronization rescattering. The post-hadronization modification factors are calculated by means of a coupled hydrodynamical-transport model simulation under the same conditions of approximate isothermal and isochemical decoupling as assumed in the statistical hadronization model fits to the data. The fit quality is considerably better than without rescattering corrections, as already found in previous work. The curvature of the obtained "true" hadronization pseudo-critical line kappa is found to be 0.0048 +- 0.0026, in agreement with lattice QCD estimates; the pseudo-critical temperature at vanishing mu_B is found to be 164.3+-1.8 MeV.

    Comments:
    9 pages, 2 figures. Minor corrections, version published in PLB
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1605.09694 [pdf]
    PLB(2017)·97 citations
  4. 04

    [Submitted on 31 May 2016]

    Evidence of strong dynamic core excitation in C resonant break-up

    J. A. Lay · R. de Diego · R. Crespo · A. M. Moro · J. M. Arias · R. C. Johnson

    The resonant break-up of C on protons measured at RIKEN [Phys. Lett. B 660, 320 (2008)] is analyzed in terms of a valence-core model for C including possible core excitations. The analysis of the angular distribution of a prominent peak appearing in the relative-energy spectrum could be well described with this model and is consistent with the previous assignment of for this state. Inclusion of core-excitation effects are found to be essential to give the correct magnitude of the cross section for this state. By contrast, the calculation assuming an inert C core is found to largely underestimate the data.

    Comments:
    5 pages, 2 figures, to be submitted
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    1605.09723 [pdf]
    PRC(2016)·20 citations
  5. 05

    [Submitted on 31 May 2016] (cross-list from hep-ph)

    Predictions for Pb Collisions at TeV: Comparison with Data

    J. L. Albacete🇫🇷 · F. Arleo🇫🇷 · G. G. Barnafoldi🇭🇺 · J. Barrette🇫🇷 · W.-T. Deng🇩🇪 · A. Dumitru🇺🇸 · K. J. Eskola🇫🇮 · E. G. Ferreiro🇪🇸 · F. Fleuret🇫🇷 · H. Fujii🇯🇵 · M. Gyulassy🇺🇸 · S. M. Harangozi🇭🇺 and 26 other authors

    Predictions made in Albacete {\it et al} prior to the LHC Pb run at TeV are compared to currently available data. Some predictions shown here have been updated by including the same experimental cuts as the data. Some additional predictions are also presented, especially for quarkonia, that were provided to the experiments before the data were made public but were too late for the original publication are also shown here.

    Comments:
    55 pages 35 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    1605.09479 [pdf]
    IJMPE(2016)·38 citations

Affiliations

first authorsco-authorsvia INSPIRE