Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloInfluence of the neutron-skin effect on nuclear isobar collisions at RHIC
Anno di pubblicazione2019
FormatoElettronico
Autore/iJ. Hammelmann (1,2), A. Soto-Ontoso (3), M. Alvioli (4), H. Elfner (1,2,5), M. Strikman (6)
Affiliazioni autori(1) Goethe-Universit ?at Frankfurt, Max-von-Laue-Strasse 1, 60438 Frankfurt am Main, Germany (2) Frankfurt Institute for Advanced Studies, Ruth-Moufang-Strasse 1, 60438 Frankfurt am Main, Germany (3) Physics Department, Brookhaven National Laboratory, Upton, NY 11973, USA (4) Consiglio Nazionale delle Ricerche, Istituto di Ricerca per la Protezione Idrogeologica, via Madonna Alta 126, I-06128 Perugia, Italy (5) GSI Helmholtzzentrum f ?ur Schwerionenforschung GmbH, Planckstr. 1, 64291 Darmstadt, Germany (6) Pennsylvania State University, University Park, PA 16802, US
Autori CNR e affiliazioni
  • MASSIMILIANO ALVIOLI
Lingua/e
  • inglese
AbstractThe unambiguous observation of a Chiral Magnetic Effect (CME)-driven charge separation is the core aim of the isobar program at RHIC consisting of 96,40Zr+96,40Zr and 96,44Ru+96,44Ru collisions at ?sNN=200 GeV. We quantify the role of the spatial distributions of the nucleons in the isobars on both eccentricity and magnetic field strength within a relativistic hadronic transport approach (SMASH). In particular, we introduce isospin-dependent nucleon-nucleon spatial correlations in the geometric description of both nuclei, deformation for 96,44Ru and the so-called neutron skin effect for the neutron-rich isobar i.e. 96,40Zr. The main result of this study is a reduction of the magnetic field strength difference between 96,44Ru+96,44Ru and 96,40Zr+96,40Zr by a factor of 2, from 10% to 5% in peripheral collisions when the neutron-skin effect is included. Further, we find an increase of eccentricity by up to 10% when deformation is taken into account while neither the neutron skin effect nor the nucleon-nucleon correlations result into a significant modification of this observable with respect to the traditional Woods-Saxon modeling. Our results suggest a significantly smaller CME signal to background ratio for the experimental charge separation measurement in peripheral collisions with the isobar systems than previously expected.
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RivistaPhysical review letters (Print)
Attiva dal 1958
Editore: American Physical Society. - [Woodbury, N.Y., etc.]
Paese di pubblicazione: Stati Uniti d'America
Lingua: inglese
ISSN: 0031-9007
Titolo chiave: Physical review letters (Print)
Titolo proprio: Physical review letters. (Print)
Titolo abbreviato: Phys. rev. lett. (Print)
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Verificato da refereeSì: Internazionale
Stato della pubblicazionePreprint
Indicizzazione (in banche dati controllate)-
Parole chiaveneutron skin, RHIC, isobar
Link (URL, URI)https://arxiv.org/abs/1908.10231
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Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
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Influence of the neutron-skin effect on nuclear isobar collisions at RHIC
Descrizione: arXiv:1908.10231 [nucl-th]
Tipo documento: application/pdf