Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson
Abstract Decays of the 125 GeV Higgs boson into a Z boson and a ρ0(770) or ϕ(1020) meson are searched for using proton-proton collision data collected by the CMS experiment at the LHC at...
| Автори: | , , , , , , , , , , , , , , , , |
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| Інші автори: | |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Springer Berlin Heidelberg
2021
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| Онлайн доступ: | https://hdl.handle.net/1721.1/132007 |
| _version_ | 1826199446220701696 |
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| author | Sirunyan, A. M. Tumasyan, A. Adam, W. Ambrogi, F. Bergauer, T. Dragicevic, M. Erö, J. Escalante Del Valle, A. Frühwirth, R. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Madlener, T. Mikulec, I. Pitters, F. M. Rad, N. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Sirunyan, A. M. Tumasyan, A. Adam, W. Ambrogi, F. Bergauer, T. Dragicevic, M. Erö, J. Escalante Del Valle, A. Frühwirth, R. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Madlener, T. Mikulec, I. Pitters, F. M. Rad, N. |
| author_sort | Sirunyan, A. M. |
| collection | MIT |
| description | Abstract
Decays of the 125 GeV Higgs boson into a Z boson and a ρ0(770) or ϕ(1020) meson are searched for using proton-proton collision data collected by the CMS experiment at the LHC at
s
$$ \sqrt{s} $$
= 13 TeV. The analysed data set corresponds to an integrated luminosity of 137 fb−1. Events are selected in which the Z boson decays into a pair of electrons or a pair of muons, and the ρ and ϕ mesons decay into pairs of pions and kaons, respectively. No significant excess above the background model is observed. As different polarization states are possible for the decay products of the Z boson and ρ or ϕ mesons, affecting the signal acceptance, scenarios in which the decays are longitudinally or transversely polarized are considered. Upper limits at the 95% confidence level on the Higgs boson branching fractions into Zρ and Zϕ are determined to be 1.04–1.31% and 0.31–0.40%, respectively, where the ranges reflect the considered polarization scenarios; these values are 740–940 and 730–950 times larger than the respective standard model expectations. These results constitute the first experimental limits on the two decay channels. |
| first_indexed | 2024-09-23T11:20:21Z |
| format | Article |
| id | mit-1721.1/132007 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:20:21Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1320072023-12-22T19:51:16Z Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson Sirunyan, A. M. Tumasyan, A. Adam, W. Ambrogi, F. Bergauer, T. Dragicevic, M. Erö, J. Escalante Del Valle, A. Frühwirth, R. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Madlener, T. Mikulec, I. Pitters, F. M. Rad, N. Massachusetts Institute of Technology. Department of Physics Abstract Decays of the 125 GeV Higgs boson into a Z boson and a ρ0(770) or ϕ(1020) meson are searched for using proton-proton collision data collected by the CMS experiment at the LHC at s $$ \sqrt{s} $$ = 13 TeV. The analysed data set corresponds to an integrated luminosity of 137 fb−1. Events are selected in which the Z boson decays into a pair of electrons or a pair of muons, and the ρ and ϕ mesons decay into pairs of pions and kaons, respectively. No significant excess above the background model is observed. As different polarization states are possible for the decay products of the Z boson and ρ or ϕ mesons, affecting the signal acceptance, scenarios in which the decays are longitudinally or transversely polarized are considered. Upper limits at the 95% confidence level on the Higgs boson branching fractions into Zρ and Zϕ are determined to be 1.04–1.31% and 0.31–0.40%, respectively, where the ranges reflect the considered polarization scenarios; these values are 740–940 and 730–950 times larger than the respective standard model expectations. These results constitute the first experimental limits on the two decay channels. 2021-09-20T17:41:23Z 2021-09-20T17:41:23Z 2020-11-10 2021-02-28T04:38:32Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/132007 Journal of High Energy Physics. 2020 Nov 10;2020(11):39 PUBLISHER_CC en https://doi.org/10.1007/JHEP11(2020)039 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Sirunyan, A. M. Tumasyan, A. Adam, W. Ambrogi, F. Bergauer, T. Dragicevic, M. Erö, J. Escalante Del Valle, A. Frühwirth, R. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Madlener, T. Mikulec, I. Pitters, F. M. Rad, N. Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson |
| title | Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson |
| title_full | Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson |
| title_fullStr | Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson |
| title_full_unstemmed | Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson |
| title_short | Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson |
| title_sort | search for decays of the 125 gev higgs boson into a z boson and a ρ or ϕ meson |
| url | https://hdl.handle.net/1721.1/132007 |
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