![Figure 5. Isolated photon and di-jet correlation, xJJγ calculated using prompt-photon events generated by JETSCAPE compared with ATLAS preliminary results [7].](https://hackernoon.imgix.net/images/fWZa4tUiBGemnqQfBGgCPf9594N2-tnf30pv.png?auto=format&fit=max&w=3840)
Sep 04, 2024
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Simulating Photon-Triggered Jets in Quark-Gluon Plasma: Results and Discussion
by NomadismSeptember 4th, 2024
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JETSCAPE results for the majority of photon-triggered jet observables provide an excellent description of the experimental results. This analysis was conducted without further modification of the previous PP19 and AA22 parameter tunes. Although the isolated photons mainly consist of prompt photons, these findings suggest a significant contribution to the transverse momentum imbalance from other photons.Authors:
(1) Chathuranga Sirimanna, Department of Physics, Duke University, Durham, Department of Physics and Astronomy, Wayne State University, Detroit, and for the JETSCAPE Collaboration;
(2) Yasuki Tachibana, Akita International University, Yuwa, Akita-city 010-1292, Japan and for the JETSCAPE Collaboration.
Table of Links
2 Simulating photon triggered jets using JETSCAPE framework
3 Results and Discussion, Acknowledgments, and References
3 Results and Discussion
Since CMS results for both p-p and Pb-Pb are smeared, the same smearing function is applied for a proper comparison, as illustrated in Figure 3. Similarly, in this case, results from full events exhibit better agreement with the experimental results. Although the isolated photons mainly consist of prompt photons, these findings suggest a significant contribution to the transverse momentum imbalance from other photons, including those produced in the partonic shower and fragmentation photons.
JETSCAPE results for the majority of photon-triggered jet observables provide an excellent description of the experimental results without requiring additional parameter tuning. While current theoretical knowledge is insufficient to fully understand certain observables like isolated photon and multi-jet correlation, JETSCAPE, with its multistage evolution, offers an excellent description of all stages of jet evolution — a significant improvement over single-stage jet evolution. This analysis was conducted without further modification of the previous PP19 and AA22 parameter tunes. Therefore, this study serves as a parameter-free verification of multistage evolution.
Acknowledgments
These proceedings are supported in part by the National Science Foundation (NSF) within the framework of the JETSCAPE collaboration, under grant numbers ACI-1550300 OAC2004571 (CSSI:X-SCAPE) and in part by the U.S. Department of Energy (DOE) under grant number DE-SC0013460.
References
[1] X.N. Wang, Z. Huang, I. Sarcevic, Phys. Rev. Lett. 77, 231 (1996), hep-ph/9605213
[2] A. Kumar et al. (JETSCAPE), Phys. Rev. C 102, 054906 (2020), 1910.05481
[3] A. Kumar et al. (JETSCAPE), Phys. Rev. C 107, 034911 (2023), 2204.01163
[4] C. Sirimanna (JETSCAPE), PoS HardProbes2020, 051 (2021), 2009.04407
[5] M. Aaboud et al. (ATLAS), Phys. Lett. B 789, 167 (2019), 1809.07280
[6] A.M. Sirunyan et al. (CMS), Phys. Lett. B 785, 14 (2018), 1711.09738
[7] Tech. rep., CERN, Geneva (2023), all figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLASCONF-2023-008, https://cds.cern.ch/record/2854837
This paper is available on arxiv under CC BY 4.0 DEED license.
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