Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 TeV

A statistical combination of several searches for the electroweak production of charginos and neutralinos is presented. All searches use proton-proton collision data at √ s = 13 TeV, recorded with the CMS detector at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1 . I...

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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 2018
Subjects:	QC Physics
Online Access:	http://irep.iium.edu.my/65018/ http://irep.iium.edu.my/65018/ http://irep.iium.edu.my/65018/ http://irep.iium.edu.my/65018/1/65018_Combined%20search%20for%20electroweak%20production_artcile.pdf http://irep.iium.edu.my/65018/2/65018_Combined%20search%20for%20electroweak%20production_scopus.pdf http://irep.iium.edu.my/65018/13/65018_Combined%20search%20for%20electroweak%20production%20of%20charginos%20and%20neutralinos%20in%20proton-proton%20collisions%20at%20%E2%88%9As%3D13%20TeV_WoS.pdf

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spelling	iium-650182018-08-01T01:12:25Z http://irep.iium.edu.my/65018/ Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 TeV Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli QC Physics A statistical combination of several searches for the electroweak production of charginos and neutralinos is presented. All searches use proton-proton collision data at √ s = 13 TeV, recorded with the CMS detector at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1 . In addition to the combination of previous searches, a targeted analysis requiring three or more charged leptons (electrons or muons) is presented, focusing on the challenging scenario in which the difference in mass between the two least massive neutralinos is approximately equal to the mass of the Z boson. The results are interpreted in simplified models of chargino-neutralino or neutralino pair production. For chargino-neutralino production, in the case when the lightest neutralino is massless, the combination yields an observed (expected) limit at the 95% confidence level on the chargino mass of up to 650 (570) GeV, improving upon the individual analysis limits by up to 40 GeV. If the mass difference between the two least massive neutralinos is approximately equal to the mass of the Z boson in the chargino-neutralino model, the targeted search requiring three or more leptons obtains observed and expected exclusion limits of around 225 GeV on the second neutralino mass and 125 GeV on the lightest neutralino mass, improving the observed limit by about 60 GeV in both masses compared to the previous CMS result. In the neutralino pair production model, the combined observed (expected) exclusion limit on the neutralino mass extends up to 650–750 (550–750) GeV, depending on the branching fraction assumed. This extends the observed exclusion achieved in the individual analyses by up to 200 GeV. The combined result additionally excludes some intermediate gaps in the mass coverage of the individual analyses. Springer Nature 2018-03-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/65018/1/65018_Combined%20search%20for%20electroweak%20production_artcile.pdf application/pdf en http://irep.iium.edu.my/65018/2/65018_Combined%20search%20for%20electroweak%20production_scopus.pdf application/pdf en http://irep.iium.edu.my/65018/13/65018_Combined%20search%20for%20electroweak%20production%20of%20charginos%20and%20neutralinos%20in%20proton-proton%20collisions%20at%20%E2%88%9As%3D13%20TeV_WoS.pdf Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 TeV. Journal of High Energy Physics, 2018 (3). pp. 1-46. ISSN 1029-8479 https://link.springer.com/content/pdf/10.1007%2FJHEP03%282018%29160.pdf 10.1007/JHEP03(2018)160
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English English
topic	QC Physics
spellingShingle	QC Physics Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Ambrogi, Federico Asilar, Ece Md. Ali, Mohd. Adli Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 TeV
description	A statistical combination of several searches for the electroweak production of charginos and neutralinos is presented. All searches use proton-proton collision data at √ s = 13 TeV, recorded with the CMS detector at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1 . In addition to the combination of previous searches, a targeted analysis requiring three or more charged leptons (electrons or muons) is presented, focusing on the challenging scenario in which the difference in mass between the two least massive neutralinos is approximately equal to the mass of the Z boson. The results are interpreted in simplified models of chargino-neutralino or neutralino pair production. For chargino-neutralino production, in the case when the lightest neutralino is massless, the combination yields an observed (expected) limit at the 95% confidence level on the chargino mass of up to 650 (570) GeV, improving upon the individual analysis limits by up to 40 GeV. If the mass difference between the two least massive neutralinos is approximately equal to the mass of the Z boson in the chargino-neutralino model, the targeted search requiring three or more leptons obtains observed and expected exclusion limits of around 225 GeV on the second neutralino mass and 125 GeV on the lightest neutralino mass, improving the observed limit by about 60 GeV in both masses compared to the previous CMS result. In the neutralino pair production model, the combined observed (expected) exclusion limit on the neutralino mass extends up to 650–750 (550–750) GeV, depending on the branching fraction assumed. This extends the observed exclusion achieved in the individual analyses by up to 200 GeV. The combined result additionally excludes some intermediate gaps in the mass coverage of the individual analyses.
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	Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 TeV
title_short	Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 TeV
title_full	Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 TeV
title_fullStr	Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 TeV
title_full_unstemmed	Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 TeV
title_sort	combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 tev
publisher	Springer Nature
publishDate	2018
url	http://irep.iium.edu.my/65018/ http://irep.iium.edu.my/65018/ http://irep.iium.edu.my/65018/ http://irep.iium.edu.my/65018/1/65018_Combined%20search%20for%20electroweak%20production_artcile.pdf http://irep.iium.edu.my/65018/2/65018_Combined%20search%20for%20electroweak%20production_scopus.pdf http://irep.iium.edu.my/65018/13/65018_Combined%20search%20for%20electroweak%20production%20of%20charginos%20and%20neutralinos%20in%20proton-proton%20collisions%20at%20%E2%88%9As%3D13%20TeV_WoS.pdf
first_indexed	2023-09-18T21:32:14Z
last_indexed	2023-09-18T21:32:14Z
_version_	1777412587877564416

Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at √s=13 TeV

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