Interplay of prompt and non-prompt photons in photon-triggered jet observables
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| author | Sirimanna, Chathuranga Tachibana, Yasuki Majumder, Abhijit Angerami, Aaron Arora, Ritu Bass, Steffen Chen, Yi Datta, Ritoban Du, Lipei Ehlers, Raymond Elfner, Hannah Fries, Rainer J. Gale, Charles He, Yayun Jacak, Barbara Jacobs, Peter Jeon, Sangyong Ji, Yi Jonas, Florian Kasper, Lauren Kordell, Michael Kumar, Amit Kunnawalkam-Elayavalli, Raghav Latessa, Joseph Lee, Yen-Jie Lemmon, Roy Luzum, Matt Mak, Simon Mankolli, Andi Martin, Christal Mehryar, Haydar Mengel, Tanner Nattrass, Christine Norman, Jaime Paquet, Jean-Francois Parker, Cameron Putschke, Joern H. Roch, Hendrik Roland, Gunther Schenke, Bjoern Schwiebert, Loren Sengupta, Arjun Shen, Chun Singh, Mayank Soeder, Derek Soltz, Ron A. Soudi, Ismail Velkovska, Julia Vujanovic, Gojko Wang, Xin-Nian Wu, Xinag-Yu Zhao, Wenbin |
| author_facet | Sirimanna, Chathuranga Tachibana, Yasuki Majumder, Abhijit Angerami, Aaron Arora, Ritu Bass, Steffen Chen, Yi Datta, Ritoban Du, Lipei Ehlers, Raymond Elfner, Hannah Fries, Rainer J. Gale, Charles He, Yayun Jacak, Barbara Jacobs, Peter Jeon, Sangyong Ji, Yi Jonas, Florian Kasper, Lauren Kordell, Michael Kumar, Amit Kunnawalkam-Elayavalli, Raghav Latessa, Joseph Lee, Yen-Jie Lemmon, Roy Luzum, Matt Mak, Simon Mankolli, Andi Martin, Christal Mehryar, Haydar Mengel, Tanner Nattrass, Christine Norman, Jaime Paquet, Jean-Francois Parker, Cameron Putschke, Joern H. Roch, Hendrik Roland, Gunther Schenke, Bjoern Schwiebert, Loren Sengupta, Arjun Shen, Chun Singh, Mayank Soeder, Derek Soltz, Ron A. Soudi, Ismail Velkovska, Julia Vujanovic, Gojko Wang, Xin-Nian Wu, Xinag-Yu Zhao, Wenbin |
| contents | Prompt photons are important yet challenging to observe in relativistic heavy-ion collisions, as they are produced in the early stages and traverse almost the entire QGP medium without interaction. Experimental analyses typically employ isolation cuts, in the hope to identify prompt photons. Most theoretical studies consider only events with actual prompt photons, assuming no contribution from isolated non-prompt photons to reduce computational cost. For the first time, we present a study that compares simulation results generated using inclusive (bremsstrahlung) and prompt-photon events with multiple experimental observables for both $p-p$ and $Pb-Pb$ collisions at $5.02$ TeV. Simulations are carried out using the multi-stage JETSCAPE framework tuned to describe the quenching of jets and hadrons. Isolated non-prompt photons are generated in hard photon bremsstrahlung, where the photon is radiated at a sufficient angle to the jet. Several photon triggered jet and jet substructure observables show significant contributions from inclusive photons, yielding an improvement in comparison with experimental data. Novel photon triggered jet substructure observables are also expected to show new structures, yet to be detected in experiment. This effort examines the significance of isolated non-prompt photons using parameters tuned for a simultaneous description of the leading hadron and jet spectrum, and thus provides an independent verification of the multistage evolution framework. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_00905 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Interplay of prompt and non-prompt photons in photon-triggered jet observables Sirimanna, Chathuranga Tachibana, Yasuki Majumder, Abhijit Angerami, Aaron Arora, Ritu Bass, Steffen Chen, Yi Datta, Ritoban Du, Lipei Ehlers, Raymond Elfner, Hannah Fries, Rainer J. Gale, Charles He, Yayun Jacak, Barbara Jacobs, Peter Jeon, Sangyong Ji, Yi Jonas, Florian Kasper, Lauren Kordell, Michael Kumar, Amit Kunnawalkam-Elayavalli, Raghav Latessa, Joseph Lee, Yen-Jie Lemmon, Roy Luzum, Matt Mak, Simon Mankolli, Andi Martin, Christal Mehryar, Haydar Mengel, Tanner Nattrass, Christine Norman, Jaime Paquet, Jean-Francois Parker, Cameron Putschke, Joern H. Roch, Hendrik Roland, Gunther Schenke, Bjoern Schwiebert, Loren Sengupta, Arjun Shen, Chun Singh, Mayank Soeder, Derek Soltz, Ron A. Soudi, Ismail Velkovska, Julia Vujanovic, Gojko Wang, Xin-Nian Wu, Xinag-Yu Zhao, Wenbin High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory Prompt photons are important yet challenging to observe in relativistic heavy-ion collisions, as they are produced in the early stages and traverse almost the entire QGP medium without interaction. Experimental analyses typically employ isolation cuts, in the hope to identify prompt photons. Most theoretical studies consider only events with actual prompt photons, assuming no contribution from isolated non-prompt photons to reduce computational cost. For the first time, we present a study that compares simulation results generated using inclusive (bremsstrahlung) and prompt-photon events with multiple experimental observables for both $p-p$ and $Pb-Pb$ collisions at $5.02$ TeV. Simulations are carried out using the multi-stage JETSCAPE framework tuned to describe the quenching of jets and hadrons. Isolated non-prompt photons are generated in hard photon bremsstrahlung, where the photon is radiated at a sufficient angle to the jet. Several photon triggered jet and jet substructure observables show significant contributions from inclusive photons, yielding an improvement in comparison with experimental data. Novel photon triggered jet substructure observables are also expected to show new structures, yet to be detected in experiment. This effort examines the significance of isolated non-prompt photons using parameters tuned for a simultaneous description of the leading hadron and jet spectrum, and thus provides an independent verification of the multistage evolution framework. |
| title | Interplay of prompt and non-prompt photons in photon-triggered jet observables |
| topic | High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2507.00905 |