Assessing background effects in search of the chiral vortical effect in relativistic heavy-ion collisions

Fuente: arXiv

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Bibliographic Details
Main Authors:	Wang, Chunzheng, Wan, Jie, Liao, Jinfeng, Ma, Yugang, Shi, Shuzhe, Shou, Qiye, Wang, Zhengqing, Xiong, Kegang, Zhang, Song, Zheng, Liang
Format:	Preprint
Published:	2025
Subjects:	Nuclear Theory
Online Access:	Acceder al recurso
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_version_	1866916946185814016
author	Wang, Chunzheng Wan, Jie Liao, Jinfeng Ma, Yugang Shi, Shuzhe Shou, Qiye Wang, Zhengqing Xiong, Kegang Zhang, Song Zheng, Liang
author_facet	Wang, Chunzheng Wan, Jie Liao, Jinfeng Ma, Yugang Shi, Shuzhe Shou, Qiye Wang, Zhengqing Xiong, Kegang Zhang, Song Zheng, Liang
contents	The search for the Chiral Vortical Effect (CVE) in relativistic heavy-ion collisions is carried out by measuring azimuthal correlators for baryon pairs such as $Λ$ and protons. Experimental results from the ALICE collaboration show significant separations in these observables, however, the interpretation remains unclear. It is believed that background contributions from baryon production mechanisms may play an important role. Using three phenomenological models, the Blast Wave, AMPT, and AVFD+UrQMD, we systematically investigate the background effects in Pb--Pb collisions at \snn = 5.02 TeV. We demonstrate that local baryon conservation, as well as hadronic annihilation processes, can significantly influence the correlators. The feed-down contribution from secondary protons is also estimated. Our study provides a foundation for disentangling background mechanisms and further facilitates the search for the CVE.
format	Preprint
id	arxiv_https___arxiv_org_abs_2509_09025
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Assessing background effects in search of the chiral vortical effect in relativistic heavy-ion collisions Wang, Chunzheng Wan, Jie Liao, Jinfeng Ma, Yugang Shi, Shuzhe Shou, Qiye Wang, Zhengqing Xiong, Kegang Zhang, Song Zheng, Liang Nuclear Theory The search for the Chiral Vortical Effect (CVE) in relativistic heavy-ion collisions is carried out by measuring azimuthal correlators for baryon pairs such as $Λ$ and protons. Experimental results from the ALICE collaboration show significant separations in these observables, however, the interpretation remains unclear. It is believed that background contributions from baryon production mechanisms may play an important role. Using three phenomenological models, the Blast Wave, AMPT, and AVFD+UrQMD, we systematically investigate the background effects in Pb--Pb collisions at \snn = 5.02 TeV. We demonstrate that local baryon conservation, as well as hadronic annihilation processes, can significantly influence the correlators. The feed-down contribution from secondary protons is also estimated. Our study provides a foundation for disentangling background mechanisms and further facilitates the search for the CVE.
title	Assessing background effects in search of the chiral vortical effect in relativistic heavy-ion collisions
topic	Nuclear Theory
url	https://arxiv.org/abs/2509.09025