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DOE OSTI Β· 2572807

Hard-photon-triggered jets in π‘βˆ’π‘ and π΄βˆ’π΄ collisions

Sirimanna, C. [Duke University; Wayne State University] (ORCID:0000000320928394)Β·Tachibana, Y. [Akita International University]Β·Majumder, A. [Wayne State University]Β·Angerami, A. [Lawrence Livermore National Laboratory]Β·Arora, R. [Wayne State University]Β·Bass, S. A. [Duke University]Β·Chen, Y. [Laboratory for Nuclear Science; Massachusetts Institute of Technology; Vanderbilt University]Β·Datta, R. [Wayne State University]Β·Du, L. [McGill University; University of California; Lawrence Berkeley National Laboratory]Β·Ehlers, R. [University of California; Lawrence Berkeley National Laboratory]Β·Elfner, H. [GSI Helmholtzzentrum fΓΌr Schwerionenforschung; Goethe University; Frankfurt Institute for Advanced Studies]Β·Fries, R. J. [Texas A&M University; Texas A&M University]Β·Gale, C. [McGill University]Β·He, Y. [South China University of Technology]Β·Jacak, B. V. [University of California; Lawrence Berkeley National Laboratory]Β·Jacobs, P. M. [University of California; Lawrence Berkeley National Laboratory]Β·Jeon, S. [McGill University]Β·Ji, Y. [Duke University]Β·Jonas, F. [University of California; Lawrence Berkeley National Laboratory]Β·Kasper, L. [Vanderbilt University]Β·Kordell, M. [Texas A&M University; Texas A&M University]Β·Kumar, A. [University of Regina; McGill University]Β·Kunnawalkam-Elayavalli, R. [Vanderbilt University]Β·Latessa, J. [Wayne State University]Β·Lee, Y.-J. [Laboratory for Nuclear Science; Massachusetts Institute of Technology]Β·Lemmon, R. [Daresbury, Warrington]Β·Luzum, M. [Universidade de SΓ£o Paulo]Β·Mak, S. [Duke University]Β·Mankolli, A. [Vanderbilt University]Β·Martin, C. [University of Tennessee]Β·Mehryar, H. [Wayne State University]Β·Mengel, T. [University of Tennessee]Β·Nattrass, C. [University of Tennessee]Β·Norman, J. [University of Liverpool]Β·Parker, C. [Texas A&M University; Texas A&M University]Β·Paquet, J.-F. [Vanderbilt University]Β·Putschke, J. H. [Wayne State University]Β·Roch, H. [Wayne State University]Β·Roland, G. [Laboratory for Nuclear Science; Massachusetts Institute of Technology]Β·Schenke, B. [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000179081322)Β·Schwiebert, L. [Wayne State University]Β·Sengupta, A. [Texas A&M University; Texas A&M University]Β·Shen, C. [Wayne State University; Brookhaven National Laboratory]Β·Singh, M. [Vanderbilt University]Β·Soeder, D. [Duke University]Β·Soltz, R. A. [Wayne State University; Lawrence Livermore National Laboratory]Β·Soudi, I. [Wayne State University; University of JyvΓ€skylΓ€; Helsinki Institute of Physics]Β·Velkovska, J. [Vanderbilt University]Β·Vujanovic, G. [University of Regina]Β·Wang, X.-N. [Central China Normal University; University of California; Lawrence Berkeley National Laboratory]Β·Wu, X. [McGill University; Wayne State University]Β·Zhao, W. [Wayne State University; University of California; Lawrence Berkeley National Laboratory]
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Abstract

An investigation of high-transverse-momentum (high-𝑝 𝑇 ) photon-triggered jets in proton-proton (π‘βˆ’π‘) and ion-ion (π΄βˆ’π΄) collisions at $\sqrt{s_{NN}}$=0.2 and 5.02TeV is carried out, using the multistage description of in-medium jet evolution. Monte Carlo simulations of hard scattering and energy loss in heavy-ion collisions are performed using parameters tuned in a previous study of the nuclear modification factor (𝑅 𝐴⁒𝐴 ) for inclusive jets and high-𝑝𝑇 hadrons. We obtain a good reproduction of the experimental data for photon-triggered jet 𝑅 𝐴⁒𝐴 , as measured by the ATLAS detector, the distribution of the ratio of jet to photon 𝑝 𝑇 (𝑋 𝐽⁒𝛾 ), measured by both CMS and ATLAS, and the photon-jet azimuthal correlation as measured by CMS. We obtain a moderate description of the photon-triggered jet 𝐼 𝐴⁒𝐴 , as measured by STAR. A noticeable improvement in the comparison is observed when one goes beyond prompt photons and includes bremsstrahlung and decay photons, revealing their significance in certain kinematic regions, particularly at 𝑋 𝐽⁒𝛾 >1. Moreover, azimuthal angle correlations demonstrate a notable impact of bremsstrahlung photons on the distribution, emphasizing their role in accurately describing experimental results. This work highlights the success of the multistage model of jet modification to straightforwardly predict (this set of) photon-triggered jet observables. This comparison, along with the role played by bremsstrahlung photons, has important consequences on the inclusion of such observables in a future Bayesian analysis.

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73 NUCLEAR PHYSICS AND RADIATION PHYSICSjet quenchingphoton, lepton, & quark productionquark-gluon plasmarelativistic heavy-ion collisions

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Sirimanna, C. [Duke University; Wayne State University] (ORCID:0000000320928394), Tachibana, Y. [Akita International University], Majumder, A. [Wayne State University], Angerami, A. [Lawrence Livermore National Laboratory], Arora, R. [Wayne State University], Bass, S. A. [Duke University], Chen, Y. [Laboratory for Nuclear Science; Massachusetts Institute of Technology; Vanderbilt University], Datta, R. [Wayne State University], Du, L. [McGill University; University of California; Lawrence Berkeley National Laboratory], Ehlers, R. [University of California; Lawrence Berkeley National Laboratory], Elfner, H. [GSI Helmholtzzentrum fΓΌr Schwerionenforschung; Goethe University; Frankfurt Institute for Advanced Studies], Fries, R. J. [Texas A&M University; Texas A&M University], Gale, C. [McGill University], He, Y. [South China University of Technology], Jacak, B. V. [University of California; Lawrence Berkeley National Laboratory], Jacobs, P. M. [University of California; Lawrence Berkeley National Laboratory], Jeon, S. [McGill University], Ji, Y. [Duke University], Jonas, F. [University of California; Lawrence Berkeley National Laboratory], Kasper, L. [Vanderbilt University], Kordell, M. [Texas A&M University; Texas A&M University], Kumar, A. [University of Regina; McGill University], Kunnawalkam-Elayavalli, R. [Vanderbilt University], Latessa, J. [Wayne State University], Lee, Y.-J. [Laboratory for Nuclear Science; Massachusetts Institute of Technology], Lemmon, R. [Daresbury, Warrington], Luzum, M. [Universidade de SΓ£o Paulo], Mak, S. [Duke University], Mankolli, A. [Vanderbilt University], Martin, C. [University of Tennessee], Mehryar, H. [Wayne State University], Mengel, T. [University of Tennessee], Nattrass, C. [University of Tennessee], Norman, J. [University of Liverpool], Parker, C. [Texas A&M University; Texas A&M University], Paquet, J.-F. [Vanderbilt University], Putschke, J. H. [Wayne State University], Roch, H. [Wayne State University], Roland, G. [Laboratory for Nuclear Science; Massachusetts Institute of Technology], Schenke, B. [Brookhaven National Laboratory (BNL), Upton, NY (United States)] (ORCID:0000000179081322), Schwiebert, L. [Wayne State University], Sengupta, A. [Texas A&M University; Texas A&M University], Shen, C. [Wayne State University; Brookhaven National Laboratory], Singh, M. [Vanderbilt University], Soeder, D. [Duke University], Soltz, R. A. [Wayne State University; Lawrence Livermore National Laboratory], Soudi, I. [Wayne State University; University of JyvΓ€skylΓ€; Helsinki Institute of Physics], Velkovska, J. [Vanderbilt University], Vujanovic, G. [University of Regina], Wang, X.-N. [Central China Normal University; University of California; Lawrence Berkeley National Laboratory], Wu, X. [McGill University; Wayne State University], Zhao, W. [Wayne State University; University of California; Lawrence Berkeley National Laboratory]. 2025-06-17. Hard-photon-triggered jets in π‘βˆ’π‘ and π΄βˆ’π΄ collisions. https://doi.org/10.1103/yyr5-zp16

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