Probing nuclear quadrupole deformation from correlation of elliptic flow and transverse momentum in heavy ion collisions

Jia, Jiangyong; Huang, Shengli; Zhang, Chunjian

doi:10.1103/physrevc.105.014906

Probing nuclear quadrupole deformation from correlation of elliptic flow and transverse momentum in heavy ion collisions

Journal Article · Thu Jan 06 00:00:00 EST 2022 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.105.014906· OSTI ID:1979855

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Stony Brook Univ., NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); OSTI
Stony Brook Univ., NY (United States)

In heavy ion collisions, elliptic flow v2 and radial flow, characterized by eventwise average transverse momentum [p_T], are related to the shape and size of the overlap region, which are sensitive to the shape of colliding atomic nuclei. The Pearson correlation coefficient between v₂ and [p_T], ρ₂, was found to be particularly sensitive to the quadrupole deformation parameter β that is traditionally measured in low energy experiments. Built on earlier insight that the prolate deformation β>0 reduces the ρ₂ in ultracentral collisions (UCC), we show that the prolate deformation β<0 enhances the value of ρ₂. As β>0 and β<0 are the two extremes of triaxiality, the strength and sign of v²₂-[pT] correlation can be used to provide valuable information on the triaxiality of the nucleus. Our study provide further arguments for using the hydrodynamic flow as a precision tool to directly image the deformation of the atomic nuclei at extremely short timescale (<10^-24s).

View Accepted Manuscript (DOE)

Research Organization:: State Univ. of New York (SUNY), Albany, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-87ER40331

OSTI ID:: 1979855

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 1 Vol. 105; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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