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 s $$ \sqrt{s} $$ = 13 TeV. The analysed data set corresponds to an integrated luminosity of 137 f...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2021
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| Online Access: | https://hdl.handle.net/1721.1/131930 |
| _version_ | 1826203818937810944 |
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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 | 2024-09-23T12:43:35Z |
| format | Article |
| id | mit-1721.1/131930 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:43:35Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1319302023-12-22T19:26:35Z 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. 2021-09-20T17:30:59Z 2021-09-20T17:30:59Z 2020-11-10 2020-11-15T04:08:58Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131930 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/1721.1/131930 |
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