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Semi-inclusive direct photon + jet and π0+jet correlations measured in p + p and central Au + Au collisions at √sNN=200 GeV

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The Solenoidal Tracker at RHIC (STAR) experiment at the Relativistic Heavy Ion Collider reports new measurements of jet quenching based on the semi-inclusive distribution of charged-particle jets recoiling from direct photon (𝛾dir) and neutral pion (𝜋0) triggers in 𝑝𝑝 and central Au+Au collisions at...

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Main Authors: Aboona, Bassam (Author) , Deppner, Ingo Martin (Author) , Herrmann, Norbert (Author) , Leung, Yue (Author) , Söhngen, Yannick (Author)
Corporate Author: STAR Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 1 July 2025
In: Physical review
Year: 2025, Volume: 111, Issue: 6, Pages: 1-30
ISSN:2469-9993
DOI:10.1103/8b8y-98yh
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/8b8y-98yh
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/8b8y-98yh
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Author Notes:The STAR Collaboration*
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Summary:The Solenoidal Tracker at RHIC (STAR) experiment at the Relativistic Heavy Ion Collider reports new measurements of jet quenching based on the semi-inclusive distribution of charged-particle jets recoiling from direct photon (𝛾dir) and neutral pion (𝜋0) triggers in 𝑝𝑝 and central Au+Au collisions at √𝑠𝑁⁢𝑁=200GeV for triggers in the range 9<𝐸trig𝑇<20GeV. The datasets have integrated luminosities of 3.9nb−1 for Au+Au and 23pb−1 for 𝑝𝑝 collisions. Jets are reconstructed using the anti-𝑘𝑇 algorithm with resolution parameters 𝑅=0.2 and 0.5. The large uncorrelated jet background in central Au+Au collisions is corrected using a mixed-event approach, which enables precise charged-particle jet measurements at low transverse momentum 𝑝ch𝑇,jet and large 𝑅. Recoil-jet distributions are reported in the range 𝑝ch𝑇,jet<25 GeV/𝑐. Comparison of the distributions measured in 𝑝𝑝 and Au+Au collisions reveals strong medium-induced jet yield suppression for 𝑅=0.2 with markedly less suppression for 𝑅=0.5. Comparison is also made to theoretical models incorporating jet quenching. These data provide new insight into the mechanisms underlying jet quenching and the angular dependence of medium-induced jet-energy transport and provide new constraints on modeling such effects.
Item Description:Veröffentlicht: 11. Juni 2025, korrigiert: 1. Juli 2025
*The STAR Collaboration: B.E. Aboona, I.M. Deppner, N. Herrmann, Y.H. Leung, Y. Söhngen [und 363 weitere Personen]
Im Titel ist die Zahl "0" hochgestellt
Im Titel steht der Ausdruck "sNN" unter dem Wurzelsymbol
Gesehen am 28.11.2025
Physical Description:Online Resource
ISSN:2469-9993
DOI:10.1103/8b8y-98yh

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