Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at s$$ \sqrt{s} $$ = 13 TeV
Abstract A search is presented for a Higgs boson that is produced in association with a Z boson and that decays to an undetected particle together with an isolated photon. The search is performed by the CMS Collaboration at the Large Hadron Collider using a data set corresponding to...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Springer Berlin Heidelberg
2021
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| Online Access: | https://hdl.handle.net/1721.1/131689 |
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| author | Sirunyan, A. M Tumasyan, A. Adam, W. Ambrogi, F. Bergauer, T. Brandstetter, J. Dragicevic, M. Erö, J. Escalante Del Valle, A. Flechl, M. Frühwirth, R. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. |
| 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. Brandstetter, J. Dragicevic, M. Erö, J. Escalante Del Valle, A. Flechl, M. Frühwirth, R. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. |
| author_sort | Sirunyan, A. M |
| collection | MIT |
| description | Abstract
A search is presented for a Higgs boson that is produced in association with a Z boson and that decays to an undetected particle together with an isolated photon. The search is performed by the CMS Collaboration at the Large Hadron Collider using a data set corresponding to an integrated luminosity of 137 fb−1 recorded at a center-of-mass energy of 13 TeV. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for associated Higgs and Z boson production and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a mass of 125 GeV, assuming the standard model production cross section, this corresponds to an observed (expected) upper limit on this branching fraction of 4.6 (3.6)% at 95% confidence level. These are the first limits on Higgs boson decays to final states that include an undetected massless dark photon. |
| first_indexed | 2024-09-23T15:56:02Z |
| format | Article |
| id | mit-1721.1/131689 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:56:02Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1316892023-12-08T20:29:39Z Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at s$$ \sqrt{s} $$ = 13 TeV Sirunyan, A. M Tumasyan, A. Adam, W. Ambrogi, F. Bergauer, T. Brandstetter, J. Dragicevic, M. Erö, J. Escalante Del Valle, A. Flechl, M. Frühwirth, R. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Massachusetts Institute of Technology. Department of Physics Abstract A search is presented for a Higgs boson that is produced in association with a Z boson and that decays to an undetected particle together with an isolated photon. The search is performed by the CMS Collaboration at the Large Hadron Collider using a data set corresponding to an integrated luminosity of 137 fb−1 recorded at a center-of-mass energy of 13 TeV. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for associated Higgs and Z boson production and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a mass of 125 GeV, assuming the standard model production cross section, this corresponds to an observed (expected) upper limit on this branching fraction of 4.6 (3.6)% at 95% confidence level. These are the first limits on Higgs boson decays to final states that include an undetected massless dark photon. 2021-09-20T17:29:40Z 2021-09-20T17:29:40Z 2019-10-10 2020-06-26T13:06:53Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131689 Journal of High Energy Physics. 2019 Oct 10;2019(10):139 PUBLISHER_CC en https://doi.org/10.1007/JHEP10(2019)139 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. Brandstetter, J. Dragicevic, M. Erö, J. Escalante Del Valle, A. Flechl, M. Frühwirth, R. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at s$$ \sqrt{s} $$ = 13 TeV |
| title | Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at s$$ \sqrt{s} $$ = 13 TeV |
| title_full | Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at s$$ \sqrt{s} $$ = 13 TeV |
| title_fullStr | Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at s$$ \sqrt{s} $$ = 13 TeV |
| title_full_unstemmed | Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at s$$ \sqrt{s} $$ = 13 TeV |
| title_short | Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at s$$ \sqrt{s} $$ = 13 TeV |
| title_sort | search for dark photons in decays of higgs bosons produced in association with z bosons in proton proton collisions at s sqrt s 13 tev |
| url | https://hdl.handle.net/1721.1/131689 |
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