Medium-assisted enhancement of χ c 1 ( 3872 ) production from small to large colliding systems

Guo, Yu; Guo, Xingyu; Liao, Jinfeng; Wang, Enke; Xing, Hongxi

doi:10.1103/PhysRevC.110.L021901

Title: Medium-assisted enhancement of $χ_{c 1} (3872)$ production from small to large colliding systems

Journal Article · 14 August 2024 · Physical Review. C

DOI: https://doi.org/10.1103/PhysRevC.110.L021901 · OSTI ID:2474468

Guo, Yu;

; Liao, Jinfeng; Wang, Enke; Xing, Hongxi

Studies of exotic hadrons such as the $χ_{c 1} (3872)$ state provide crucial insights into the fundamental force governing the strong interaction dynamics, with an emerging frontier to investigate their production in high energy collisions where a partonic medium is present. The latest experimental measurements from the Large Hadron Collider show an intriguing evolution pattern of the $χ_{c 1} (3872)$ -to- $ψ (2 S)$ yield ratio from proton-proton collisions with increasing multiplicities toward proton-lead and lead-lead collisions. Here we propose a mechanism of medium-assisted enhancement for the $χ_{c 1} (3872)$ production, which competes with the more conventional absorption-induced suppression and results in a nonmonotonic trend from small to large colliding systems. Realistic simulations from this model offer a quantitative description of all available data. Predictions are made for the centrality dependence of this observable in PbPb collisions as well as for its system-size dependence from OO and ArAr to XeXe and PbPb collisions. In both cases, a nonmonotonic behavior emerges as the imprint of the competition between enhancement and suppression and can be readily tested by future data. Published by the American Physical Society 2024

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Research Organization:: Indiana Univ., Bloomington, IN (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: SC0023598

OSTI ID:: 2474468

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 2 Vol. 110; ISSN PRVCAN; ISSN 2469-9985

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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