Rapidity correlations in the RHIC Beam Energy Scan Data

0481339 - ÚJF 2018 RIV NL eng J - Journal Article
Jowzaee, S. - Adamczyk, L. - Adkins, J. K. - Agakishiev, G. - Bielčík, J. - Bielčíková, Jana - Chaloupka, P. - Federič, Pavol - Rusňák, Jan - Rusňáková, O. - Šimko, Miroslav - Šumbera, Michal - Vértési, Robert … Total 341 authors
Rapidity correlations in the RHIC Beam Energy Scan Data.
Nuclear Physics. A. Roč. 967, č. 11 (2017), s. 792-795. ISSN 0375-9474. E-ISSN 1873-1554
R&D Projects: GA MŠMT LG15001; GA MŠMT LM2015054
Institutional support: RVO:61389005
Keywords : STAR collaboration * rapidity correlations * forward-backward asymmetry
OECD category: Nuclear physics
Impact factor: 1.992, year: 2017

A pair-normalized two-particle covariance versus the rapidity of the two particles, called R-2, was originally studied in ISR and FNAL data in the 1970's. This variable has recently seen renewed interest for the study of the dynamics of heavy-ion collisions in the longitudinal direction. These rapidity correlations can be decomposed into a basis set of Legendre polynomials with prefactors a(mn ) which can be considered the rapidity analog of the decomposition of azimuthal anisotropies into a set of cosine functions with prefactors vn. The a(mn) values have been suggested to be sensitive to the number of particle emitting sources, baryon stopping, viscosities, and critical behavior. The rapidity correlations have been measured by the STAR collaboration as a function of the beam energy for 0-5% central Au+Au collisions with beam energies ranging from 7.7 to 200 GeV. The experimental results and comparisons to the UrQMD model are presented.
Permanent Link: http://hdl.handle.net/11104/0276915