Effects of finite coverage on global polarization observables in heavy ion collisions

Autor: Shaowei Lan, Zi-Wei Lin, Shusu Shi, Xu Sun
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Physics Letters B, Vol 780, Iss , Pp 319-324 (2018)
Druh dokumentu: article
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2018.02.076
Popis: In non-central relativistic heavy ion collisions, the created matter possesses a large initial orbital angular momentum. Particles produced in the collisions could be polarized globally in the direction of the orbital angular momentum due to spin–orbit coupling. Recently, the STAR experiment has presented polarization signals for Λ hyperons and possible spin alignment signals for ϕ mesons. Here we discuss the effects of finite coverage on these observables. The results from a multi-phase transport and a toy model both indicate that a pseudorapidity coverage narrower than |η|
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