Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector
2021-11-22 | journal article. A publication with affiliation to the University of Göttingen.
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Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector
Aad, G.; Abbott, B.; Abbott, D. C.; Abed Abud, A.; Abeling, K.; Abhayasinghe, D. K. & Abidi, S. H. et al. (2021)
Journal of High Energy Physics, 2021(11) art. 169. DOI: https://doi.org/10.1007/JHEP11(2021)169
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Details
- Authors Group
- The ATLAS collaboration
The authors list is uncomplete: - Authors
- Aad, G.; Abbott, B.; Abbott, D. C.; Abed Abud, A.; Abeling, K.; Abhayasinghe, D. K.; Abidi, S. H.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Abusleme Hoffman, A. C.; Acharya, B. S.; Achkar, B.; Adam, L.; Adam Bourdarios, C.; Adamczyk, L.; Adamek, L.; Addepalli, S. V.; Adelman, J.; Adiguzel, A.; Adorni, S.; Adye, T.; Affolder, A. A.; Afik, Y.; Agapopoulou, C.; Agaras, M. N.; Agarwala, J.; Aggarwal, A.; Agheorghiesei, C.; Aguilar-Saavedra, J. A.; Ahmad, A.; Ahmadov, F.; Ahmed, W. S.; Ai, X.; Aielli, G.; Aizenberg, I.; Akatsuka, S.; Akbiyik, M.; Åkesson, T. P. A.; Akimov, A. V.; Al Khoury, K.; Alberghi, G. L.; Albert, J.; Alconada Verzini, M. J.; Alderweireldt, S.; Aleksa, M.; Aleksandrov, I. N.; Alexa, C.; Alexopoulos, T.; Alfonsi, A.; Anthony, M. T.; Arnold, H.; Balaji, S.; Chen, Y.; Degens, J.; Dreyer, T.; Falke, S.; Fournier, D.; Gao, Y.; Gao, Y. S.; Grosse-Knetter, J.; Guenther, J.; Harenberg, T.; Jin, S.; Kim, E.; Kluth, S.; Krüger, H.; Kuhl, T.; Lai, S.; Lehmann, K.; Lehmann, N.; Li, H.; Li, H.; Li, J.; Li, K.; Li, X.; Li, Y.; Liu, B.; Lorenz, J.; Lu, M.; Lu, S.; Lutz, M. S.; Martinez, M.; Menke, S.; Meyer, C.; Morgenstern, S.; Mueller, J.; Mueller, R.; Quadt, A.; Rajagopalan, S.; Rave, S.; Schaefer, L.; Schoening, A.; Schott, M.; Seitz, C.; Sen, S.; Sharma, S.; Wang, C.; Wang, C.; Wang, H.; Wang, J.; Wang, Y.; Weber, M. S.; Xu, Y.; Zhang, B.; Zhang, J.; Zhang, K.; Zhang, M.; Zhao, Z.; Zhou, Y.; Zhu, C.
- Abstract
- Abstract A measurement of prompt photon-pair production in proton-proton collisions at s $ \sqrt{s} $ = 13 TeV is presented. The data were recorded by the ATLAS detector at the LHC with an integrated luminosity of 139 fb−1. Events with two photons in the well-instrumented region of the detector are selected. The photons are required to be isolated and have a transverse momentum of p T , γ 1 2 $ {p}_{\mathrm{T}{,}_{\gamma 1(2)}} $ > 40 (30) GeV for the leading (sub-leading) photon. The differential cross sections as functions of several observables for the diphoton system are measured and compared with theoretical predictions from state-of-the-art Monte Carlo and fixed-order calculations. The QCD predictions from next-to-next-to-leading-order calculations and multi-leg merged calculations are able to describe the measured integrated and differential cross sections within uncertainties, whereas lower-order calculations show significant deviations, demonstrating that higher-order perturbative QCD corrections are crucial for this process. The resummed predictions with parton showers additionally provide an excellent description of the low transverse-momentum regime of the diphoton system.
- Issue Date
- 22-November-2021
- Publisher
- Springer Berlin Heidelberg
- Journal
- Journal of High Energy Physics
- eISSN
- 1029-8479
- Language
- English
