Search for rare decays of Z and Higgs bosons to J/ψ and a photon in proton-proton collisions at √s = 13 TeV

A search is presented for decays of Z and Higgs bosons to a J/ψ meson and a photon, with the subsequent decay of the J/ψ to μ+μ−. The analysis uses data from proton-proton collisions with an integrated luminosity of 35.9 fb−1 at √s = 13 TeV collected with the CMS detector at the LHC. The observe...

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Main Authors:	Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Ambrogi, Federico, Asilar, Ece, Md. Ali, Mohd. Adli
Format:	Article
Language:	English English English
Published:	Springer Nature 2019
Subjects:	Q Science (General) QC Physics
Online Access:	http://irep.iium.edu.my/71633/ http://irep.iium.edu.my/71633/ http://irep.iium.edu.my/71633/ http://irep.iium.edu.my/71633/1/71633_Search%20for%20rare%20decays%20of%20Z%20and%20Higgs_article.pdf http://irep.iium.edu.my/71633/2/71633_Search%20for%20rare%20decays%20of%20Z%20and%20Higgs_scopus.pdf http://irep.iium.edu.my/71633/3/71633_Search%20for%20rare%20decays%20of%20Z%20and%20Higgs_wos.pdf

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spelling	iium-716332019-07-12T03:19:25Z http://irep.iium.edu.my/71633/ Search for rare decays of Z and Higgs bosons to J/ψ and a photon in proton-proton collisions at √s = 13 TeV Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli Q Science (General) QC Physics A search is presented for decays of Z and Higgs bosons to a J/ψ meson and a photon, with the subsequent decay of the J/ψ to μ+μ−. The analysis uses data from proton-proton collisions with an integrated luminosity of 35.9 fb−1 at √s = 13 TeV collected with the CMS detector at the LHC. The observed limit on the Z → J/ψγ decay branching fraction, assuming that the J/ψ meson is produced unpolarized, is 1.4 × 10−6 at 95% confidence level, which corresponds to a rate higher than expected in the standard model by a factor of 15. For extreme-polarization scenarios, the observed limit changes from −13.6 to +8.6% with respect to the unpolarized scenario. The observed upper limit on the branching fraction for H → J/ψγ where the J/ψ meson is assumed to be transversely polarized is 7.6×10−4, a factor of 260 larger than the standard model prediction. The results for the Higgs boson are combined with previous data from proton-proton collisions at √s = 8 TeV to produce an observed upper limit on the branching fraction for H → J/ψγ that is a factor of 220 larger than the standard model value. Springer Nature 2019-02-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/71633/1/71633_Search%20for%20rare%20decays%20of%20Z%20and%20Higgs_article.pdf application/pdf en http://irep.iium.edu.my/71633/2/71633_Search%20for%20rare%20decays%20of%20Z%20and%20Higgs_scopus.pdf application/pdf en http://irep.iium.edu.my/71633/3/71633_Search%20for%20rare%20decays%20of%20Z%20and%20Higgs_wos.pdf Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2019) Search for rare decays of Z and Higgs bosons to J/ψ and a photon in proton-proton collisions at √s = 13 TeV. European Physical Journal C, 79 (2). pp. 1-27. ISSN 1434-6044 E-ISSN 1434-6052 https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-019-6562-5.pdf 10.1140/epjc/s10052-019-6562-5
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English English
topic	Q Science (General) QC Physics
spellingShingle	Q Science (General) QC Physics Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli Search for rare decays of Z and Higgs bosons to J/ψ and a photon in proton-proton collisions at √s = 13 TeV
description	A search is presented for decays of Z and Higgs bosons to a J/ψ meson and a photon, with the subsequent decay of the J/ψ to μ+μ−. The analysis uses data from proton-proton collisions with an integrated luminosity of 35.9 fb−1 at √s = 13 TeV collected with the CMS detector at the LHC. The observed limit on the Z → J/ψγ decay branching fraction, assuming that the J/ψ meson is produced unpolarized, is 1.4 × 10−6 at 95% confidence level, which corresponds to a rate higher than expected in the standard model by a factor of 15. For extreme-polarization scenarios, the observed limit changes from −13.6 to +8.6% with respect to the unpolarized scenario. The observed upper limit on the branching fraction for H → J/ψγ where the J/ψ meson is assumed to be transversely polarized is 7.6×10−4, a factor of 260 larger than the standard model prediction. The results for the Higgs boson are combined with previous data from proton-proton collisions at √s = 8 TeV to produce an observed upper limit on the branching fraction for H → J/ψγ that is a factor of 220 larger than the standard model value.
format	Article
author	Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli
author_facet	Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli
author_sort	Sirunyan, A. M.
title	Search for rare decays of Z and Higgs bosons to J/ψ and a photon in proton-proton collisions at √s = 13 TeV
title_short	Search for rare decays of Z and Higgs bosons to J/ψ and a photon in proton-proton collisions at √s = 13 TeV
title_full	Search for rare decays of Z and Higgs bosons to J/ψ and a photon in proton-proton collisions at √s = 13 TeV
title_fullStr	Search for rare decays of Z and Higgs bosons to J/ψ and a photon in proton-proton collisions at √s = 13 TeV
title_full_unstemmed	Search for rare decays of Z and Higgs bosons to J/ψ and a photon in proton-proton collisions at √s = 13 TeV
title_sort	search for rare decays of z and higgs bosons to j/ψ and a photon in proton-proton collisions at √s = 13 tev
publisher	Springer Nature
publishDate	2019
url	http://irep.iium.edu.my/71633/ http://irep.iium.edu.my/71633/ http://irep.iium.edu.my/71633/ http://irep.iium.edu.my/71633/1/71633_Search%20for%20rare%20decays%20of%20Z%20and%20Higgs_article.pdf http://irep.iium.edu.my/71633/2/71633_Search%20for%20rare%20decays%20of%20Z%20and%20Higgs_scopus.pdf http://irep.iium.edu.my/71633/3/71633_Search%20for%20rare%20decays%20of%20Z%20and%20Higgs_wos.pdf
first_indexed	2023-09-18T21:41:34Z
last_indexed	2023-09-18T21:41:34Z
_version_	1777413175106338816

Search for rare decays of Z and Higgs bosons to J/ψ and a photon in proton-proton collisions at √s = 13 TeV

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