Observation of electroweak production of two jets in association with an isolated photon and missing transverse momentum, and search for a Higgs boson decaying into invisible particles at 13 $\text {TeV}$ with the ATLAS detector
2022-02-03 | journal article. A publication with affiliation to the University of Göttingen.
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Observation of electroweak production of two jets in association with an isolated photon and missing transverse momentum, and search for a Higgs boson decaying into invisible particles at 13 $\text {TeV}$ with the ATLAS detector
Aad, G.; Abbott, B.; Abbott, D. C.; Abud, A. A.; Abeling, K.; Abhayasinghe, D. K. & Abidi, S. H. et al. (2022)
The European Physical Journal C, 82(2) art. 105. DOI: https://doi.org/10.1140/epjc/s10052-021-09878-z
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Details
- Authors Group
- ATLAS Collaboration
The authors list is uncomplete: - Authors
- Aad, G.; Abbott, B.; Abbott, D. C.; Abud, A. A.; Abeling, K.; Abhayasinghe, D. K.; Abidi, S. H.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; Albert, J.; Ali, S.; Anthony, M. T.; Arnold, H.; Balaji, S.; Bauer, F.; Chen, J.; Chen, J.; Chen, S.; Chen, Y.; Chowdhury, T.; David, C.; De Castro, S.; Degens, J.; Dreyer, T.; Falke, S.; Fournier, D.; Gao, Y.; Gao, Y. S.; George, S.; Grosse-Knetter, J.; Guenther, J.; Han, S.; Harenberg, T.; Heim, S.; Heim, T.; Herrmann, T.; Holm, T.; Hu, S.; Jin, S.; Keller, J. S.; Kersten, S.; Kim, E.; Kluth, S.; Korn, S.; Krüger, H.; Kuhl, T.; Lai, S.; Lee, S.; Lehmann, K.; Lehmann, N.; Li, H.; 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.; Schoening, A.; Schott, M.; Seitz, C.; Sen, S.; Sharma, S.; Wang, C.; Wang, C.; Wang, H.; Wang, J.; Wang, Y.; Weber, M. S.; Xu, T.; Xu, Y.; Zhang, B.; Zhang, J.; Zhang, K.; Zhang, M.; Zhao, Z.; Zhou, Y.; Zhu, C.
- Abstract
- Abstract This paper presents a measurement of the electroweak production of two jets in association with a 1497301Z\gamma 1497301 Z γ pair, with the Z boson decaying into two neutrinos. It also presents a search for invisible or partially invisible decays of a Higgs boson with a mass of 125 1497301\text {GeV}1497301 GeV produced through vector-boson fusion with a photon in the final state. These results use data from LHC proton–proton collisions at 1497301\sqrt{s}1497301 s = 13 1497301\text {TeV}1497301 TeV collected with the ATLAS detector and corresponding to an integrated luminosity of 139 1497301\hbox {fb}^{-1}1497301 fb - 1 . The event signature, shared by all benchmark processes considered for the measurements and searches, is characterized by a significant amount of unbalanced transverse momentum and a photon in the final state, in addition to a pair of forward jets. Electroweak 1497301Z\gamma 1497301 Z γ production in association with two jets is observed in this final state with a significance of 5.2 (5.1 expected) standard deviations. The measured fiducial cross-section for this process is 14973011.31\pm 0.291497301 1.31 ± 0.29 fb. An observed (expected) upper limit of 0.37 ( 14973010.34^{+0.15}_{-0.10}1497301 0 . 34 - 0.10 + 0.15 ) at 95% confidence level is set on the branching ratio of a 125 1497301\text {GeV}1497301 GeV Higgs boson to invisible particles, assuming the Standard Model production cross-section. The signature is also interpreted in the context of decays of a Higgs boson into a photon and a dark photon. An observed (expected) 95% CL upper limit on the branching ratio for this decay is set at 0.018 ( 14973010.017^{+0.007}_{-0.005}1497301 0 . 017 - 0.005 + 0.007 ), assuming the Standard Model production cross-section for a 125 1497301\text {GeV}1497301 GeV Higgs boson.
- Issue Date
- 3-February-2022
- Publisher
- Springer Berlin Heidelberg
- Journal
- The European Physical Journal C
- ISSN
- 1434-6044
- eISSN
- 1434-6052
- Language
- English
