Measurements of the pp -> ZZ production cross section and the Z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13TeV

Measurements of the pp -> ZZ production cross section and the Z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13TeV

Four-lepton production in proton-proton collisions, pp → (Z/γ ∗)(Z/γ ∗) → 4, where = e or μ, is studied at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb−1. The ZZ production cross section, σ (pp → ZZ) = 17....

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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
Published: Springer Link 2018
Subjects:
Q Science (General)
QC Physics
Online Access:http://irep.iium.edu.my/70434/
http://irep.iium.edu.my/70434/
http://irep.iium.edu.my/70434/
http://irep.iium.edu.my/70434/1/70434_Measurements%20of%20the%20pp%20%E2%86%92%20ZZ%20production%20cross%20section_article.pdf
http://irep.iium.edu.my/70434/7/70434_Measurements%20of%20the%20pp%20%E2%86%92%20ZZ%20production%20cross%20section_wos.pdf
id iium-70434
recordtype eprints
spelling iium-704342019-07-15T01:30:34Z http://irep.iium.edu.my/70434/ Measurements of the pp -> ZZ production cross section and the Z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13TeV Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli Q Science (General) QC Physics Four-lepton production in proton-proton collisions, pp → (Z/γ ∗)(Z/γ ∗) → 4, where = e or μ, is studied at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb−1. The ZZ production cross section, σ (pp → ZZ) = 17.2 ± 0.5 (stat) ± 0.7 (syst) ± 0.4 (theo) ± 0.4 (lumi) pb, measured using events with two opposite-sign, same-flavor lepton pairs produced in the mass region 60 < m+− < 120 GeV, is consistent with standard model predictions. Differential cross sections are measured and are well described by the theoretical predictions. The Z boson branching fraction to four leptons is measured to be B(Z → 4) = 4.83+0.23 −0.22(stat) +0.32 −0.29(syst) ± 0.08(theo) ± 0.12(lumi) × 10−6 for events with a four-lepton invariant mass in the range 80 < m4 < 100 GeV and a dilepton mass m > 4 GeV for all opposite-sign, same-flavor lepton pairs. The results agree with standard model predictions. The invariant mass distribution of the four-lepton system is used to set limits on anomalous ZZZ and ZZγ couplings at 95% confidence level: − 0.0012 < f Z 4 < 0.0010, − 0.0010 < f Z 5 < 0.0013, − 0.0012 < f γ 4 < 0.0013, − 0.0012 < f γ 5 < 0.0013. Springer Link 2018 Article PeerReviewed application/pdf en http://irep.iium.edu.my/70434/1/70434_Measurements%20of%20the%20pp%20%E2%86%92%20ZZ%20production%20cross%20section_article.pdf application/pdf en http://irep.iium.edu.my/70434/7/70434_Measurements%20of%20the%20pp%20%E2%86%92%20ZZ%20production%20cross%20section_wos.pdf Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Measurements of the pp -> ZZ production cross section and the Z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13TeV. The European Physical C, 78 (2). pp. 1-29. ISSN 1434-6044 E-ISSN 1434-6052 https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-018-5567-9.pdf 10.1140/epjc/s10052-018-5567-9
repository_type Digital Repository
institution_category Local University
institution International Islamic University Malaysia
building IIUM Repository
collection Online Access
language 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
Measurements of the pp -> ZZ production cross section and the Z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13TeV
description Four-lepton production in proton-proton collisions, pp → (Z/γ ∗)(Z/γ ∗) → 4, where = e or μ, is studied at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb−1. The ZZ production cross section, σ (pp → ZZ) = 17.2 ± 0.5 (stat) ± 0.7 (syst) ± 0.4 (theo) ± 0.4 (lumi) pb, measured using events with two opposite-sign, same-flavor lepton pairs produced in the mass region 60 < m+− < 120 GeV, is consistent with standard model predictions. Differential cross sections are measured and are well described by the theoretical predictions. The Z boson branching fraction to four leptons is measured to be B(Z → 4) = 4.83+0.23 −0.22(stat) +0.32 −0.29(syst) ± 0.08(theo) ± 0.12(lumi) × 10−6 for events with a four-lepton invariant mass in the range 80 < m4 < 100 GeV and a dilepton mass m > 4 GeV for all opposite-sign, same-flavor lepton pairs. The results agree with standard model predictions. The invariant mass distribution of the four-lepton system is used to set limits on anomalous ZZZ and ZZγ couplings at 95% confidence level: − 0.0012 < f Z 4 < 0.0010, − 0.0010 < f Z 5 < 0.0013, − 0.0012 < f γ 4 < 0.0013, − 0.0012 < f γ 5 < 0.0013.
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 Measurements of the pp -> ZZ production cross section and the Z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13TeV
title_short Measurements of the pp -> ZZ production cross section and the Z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13TeV
title_full Measurements of the pp -> ZZ production cross section and the Z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13TeV
title_fullStr Measurements of the pp -> ZZ production cross section and the Z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13TeV
title_full_unstemmed Measurements of the pp -> ZZ production cross section and the Z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13TeV
title_sort measurements of the pp -> zz production cross section and the z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13tev
publisher Springer Link
publishDate 2018
url http://irep.iium.edu.my/70434/
http://irep.iium.edu.my/70434/
http://irep.iium.edu.my/70434/
http://irep.iium.edu.my/70434/1/70434_Measurements%20of%20the%20pp%20%E2%86%92%20ZZ%20production%20cross%20section_article.pdf
http://irep.iium.edu.my/70434/7/70434_Measurements%20of%20the%20pp%20%E2%86%92%20ZZ%20production%20cross%20section_wos.pdf
first_indexed 2023-09-18T21:40:00Z
last_indexed 2023-09-18T21:40:00Z
_version_ 1777413075807240192

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