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Search for narrow resonances in dilepton mass spectra in proton–proton collisions at s=13 TeV and combination with 8 TeV data

A search for narrow resonances in dielectron and dimuon invariant mass spectra has been performed using data obtained from proton–proton collisions at √s = 13 TeV collected with the CMS detector. The integrated luminosity for the dielectron sample is 2.7 fb−1 and for the dimuon sample 2.9 fb−1. T...

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Main Authors: Khachatryan, Vardan, Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Asilar, Ece, Md. Ali, Mohd. Adli
Format: Article
Language:English
English
English
Published: Elsevier B.V. 2017
Subjects:
Q Science (General)
QC Physics
Online Access:http://irep.iium.edu.my/63110/1/63110_Search%20for%20narrow%20resonances%20in%20dilepton_article.pdf
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http://irep.iium.edu.my/63110/13/63110_Search%20for%20narrow%20resonances%20in%20dilepton_wos.pdf
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spelling my.iium.irep.631102019-08-26T06:18:39Z http://irep.iium.edu.my/63110/ Search for narrow resonances in dilepton mass spectra in proton–proton collisions at s=13 TeV and combination with 8 TeV data Khachatryan, Vardan Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Asilar, Ece Md. Ali, Mohd. Adli Q Science (General) QC Physics A search for narrow resonances in dielectron and dimuon invariant mass spectra has been performed using data obtained from proton–proton collisions at √s = 13 TeV collected with the CMS detector. The integrated luminosity for the dielectron sample is 2.7 fb−1 and for the dimuon sample 2.9 fb−1. The sensitivity of the search is increased by combining these data with a previously analyzed set of data obtained at √s = 8 TeV and corresponding to a luminosity of 20 fb−1. No evidence for nonstandard-model physics is found, either in the 13 TeV data set alone, or in the combined data set. Upper limits on the product of production cross section and branching fraction have also been calculated in a model-independent manner to enable interpretation in models predicting a narrow dielectron or dimuon resonance structure. Limits are set on the masses of hypothetical particles that could appear in new-physics scenarios. For the Z SSM particle, which arises in the sequential standard model, and for the superstring inspired Z ψ particle, 95% confidence level lower mass limits for the combined data sets and combined channels are found to be 3.37 and 2.82 TeV, respectively. The corresponding limits for the lightest Kaluza–Klein graviton arising in the Randall–Sundrum model of extra dimensions with coupling parameters 0.01 and 0.10 are 1.46 and 3.11 TeV, respectively. These results significantly exceed the limits based on the 8 TeV LHC data Elsevier B.V. 2017-05-10 Article PeerReviewed application/pdf en http://irep.iium.edu.my/63110/1/63110_Search%20for%20narrow%20resonances%20in%20dilepton_article.pdf application/pdf en http://irep.iium.edu.my/63110/2/63110_Search%20for%20narrow%20resonances%20in%20dilepton_scopus.pdf application/pdf en http://irep.iium.edu.my/63110/13/63110_Search%20for%20narrow%20resonances%20in%20dilepton_wos.pdf Khachatryan, Vardan and Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Asilar, Ece and Md. Ali, Mohd. Adli (2017) Search for narrow resonances in dilepton mass spectra in proton–proton collisions at s=13 TeV and combination with 8 TeV data. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 768. pp. 57-80. ISSN 0370-2693 https://reader.elsevier.com/reader/sd/pii/S0370269317301004?token=FC74B196F9451C1D94D4C82E8B9CF267FD2C04DBB90FD660D060B9C3687BA0F13107E57492EFF7E321C88BB9B0C16151 10.1016/j.physletb.2017.02.010
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
language English
English
English
topic Q Science (General)
QC Physics
spellingShingle Q Science (General)
QC Physics
Khachatryan, Vardan
Sirunyan, A. M.
Tumasyan, A. R.
Adam, Wolfgang
Asilar, Ece
Md. Ali, Mohd. Adli
Search for narrow resonances in dilepton mass spectra in proton–proton collisions at s=13 TeV and combination with 8 TeV data
description A search for narrow resonances in dielectron and dimuon invariant mass spectra has been performed using data obtained from proton–proton collisions at √s = 13 TeV collected with the CMS detector. The integrated luminosity for the dielectron sample is 2.7 fb−1 and for the dimuon sample 2.9 fb−1. The sensitivity of the search is increased by combining these data with a previously analyzed set of data obtained at √s = 8 TeV and corresponding to a luminosity of 20 fb−1. No evidence for nonstandard-model physics is found, either in the 13 TeV data set alone, or in the combined data set. Upper limits on the product of production cross section and branching fraction have also been calculated in a model-independent manner to enable interpretation in models predicting a narrow dielectron or dimuon resonance structure. Limits are set on the masses of hypothetical particles that could appear in new-physics scenarios. For the Z SSM particle, which arises in the sequential standard model, and for the superstring inspired Z ψ particle, 95% confidence level lower mass limits for the combined data sets and combined channels are found to be 3.37 and 2.82 TeV, respectively. The corresponding limits for the lightest Kaluza–Klein graviton arising in the Randall–Sundrum model of extra dimensions with coupling parameters 0.01 and 0.10 are 1.46 and 3.11 TeV, respectively. These results significantly exceed the limits based on the 8 TeV LHC data
format Article
author Khachatryan, Vardan
Sirunyan, A. M.
Tumasyan, A. R.
Adam, Wolfgang
Asilar, Ece
Md. Ali, Mohd. Adli
author_facet Khachatryan, Vardan
Sirunyan, A. M.
Tumasyan, A. R.
Adam, Wolfgang
Asilar, Ece
Md. Ali, Mohd. Adli
author_sort Khachatryan, Vardan
title Search for narrow resonances in dilepton mass spectra in proton–proton collisions at s=13 TeV and combination with 8 TeV data
title_short Search for narrow resonances in dilepton mass spectra in proton–proton collisions at s=13 TeV and combination with 8 TeV data
title_full Search for narrow resonances in dilepton mass spectra in proton–proton collisions at s=13 TeV and combination with 8 TeV data
title_fullStr Search for narrow resonances in dilepton mass spectra in proton–proton collisions at s=13 TeV and combination with 8 TeV data
title_full_unstemmed Search for narrow resonances in dilepton mass spectra in proton–proton collisions at s=13 TeV and combination with 8 TeV data
title_sort search for narrow resonances in dilepton mass spectra in proton–proton collisions at s=13 tev and combination with 8 tev data
publisher Elsevier B.V.
publishDate 2017
url http://irep.iium.edu.my/63110/1/63110_Search%20for%20narrow%20resonances%20in%20dilepton_article.pdf
http://irep.iium.edu.my/63110/2/63110_Search%20for%20narrow%20resonances%20in%20dilepton_scopus.pdf
http://irep.iium.edu.my/63110/13/63110_Search%20for%20narrow%20resonances%20in%20dilepton_wos.pdf
http://irep.iium.edu.my/63110/
https://reader.elsevier.com/reader/sd/pii/S0370269317301004?token=FC74B196F9451C1D94D4C82E8B9CF267FD2C04DBB90FD660D060B9C3687BA0F13107E57492EFF7E321C88BB9B0C16151
_version_ 1643619707879686144
score 13.211869

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