Search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 TeV

A search is presented for heavy vectorlike quarks (VLQs) that couple only to light quarks in protonproton collisions at ffiffi s p ¼ 8 TeV at the LHC. The data were collected by the CMS experiment during 2012 and correspond to an integrated luminosity of 19.7 fb−1. Both single and pair production...

Full description

Bibliographic Details
Main Authors:	Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Asilar, Ece, Bergauer, Thomas, Md. Ali, Mohd. Adli
Format:	Article
Language:	English English
Published:	American Physical Society 2018
Subjects:	Q Science (General) QC Physics
Online Access:	http://irep.iium.edu.my/65674/ http://irep.iium.edu.my/65674/ http://irep.iium.edu.my/65674/ http://irep.iium.edu.my/65674/1/65674_Search%20for%20vectorlike%20light-flavor%20quark%20partners_article.pdf http://irep.iium.edu.my/65674/2/65674_Search%20for%20vectorlike%20light-flavor%20quark%20partners_scopus.pdf

id	iium-65674
recordtype	eprints
spelling	iium-656742018-08-14T01:43:32Z http://irep.iium.edu.my/65674/ Search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 TeV Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Asilar, Ece Bergauer, Thomas Md. Ali, Mohd. Adli Q Science (General) QC Physics A search is presented for heavy vectorlike quarks (VLQs) that couple only to light quarks in protonproton collisions at ffiffi s p ¼ 8 TeV at the LHC. The data were collected by the CMS experiment during 2012 and correspond to an integrated luminosity of 19.7 fb−1. Both single and pair production of VLQs are considered. The single-production search is performed for down-type VLQs (electric charge of magnitude 1=3), while the pair-production search is sensitive to up-type (charge of magnitude 2=3) and down-type VLQs. Final states with at least one muon or one electron are considered. No significant excess over standard model expectations is observed, and lower limits on the mass of VLQs are derived. The lower limits range from 400 to 1800 GeV, depending on the single-production cross section and the VLQ branching fractions B to W, Z, and Higgs bosons. When considering pair production alone, VLQs with masses below 845 GeV are excluded for BðWÞ ¼ 1.0, and below 685 GeV for BðWÞ ¼ 0.5, BðZÞ ¼ BðHÞ ¼ 0.25. The results are more stringent than those previously obtained for single and pair production of VLQs coupled to light quarks. American Physical Society 2018-04-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/65674/1/65674_Search%20for%20vectorlike%20light-flavor%20quark%20partners_article.pdf application/pdf en http://irep.iium.edu.my/65674/2/65674_Search%20for%20vectorlike%20light-flavor%20quark%20partners_scopus.pdf Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Asilar, Ece and Bergauer, Thomas and Md. Ali, Mohd. Adli (2018) Search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 TeV. Physical Review D, 97 (7). 072008-1-072008-36. ISSN 2470-0010 E-ISSN 2470-0029 https://journals.aps.org/prd/pdf/10.1103/PhysRevD.97.072008 10.1103/PhysRevD.97.072008
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 Asilar, Ece Bergauer, Thomas Md. Ali, Mohd. Adli Search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 TeV
description	A search is presented for heavy vectorlike quarks (VLQs) that couple only to light quarks in protonproton collisions at ffiffi s p ¼ 8 TeV at the LHC. The data were collected by the CMS experiment during 2012 and correspond to an integrated luminosity of 19.7 fb−1. Both single and pair production of VLQs are considered. The single-production search is performed for down-type VLQs (electric charge of magnitude 1=3), while the pair-production search is sensitive to up-type (charge of magnitude 2=3) and down-type VLQs. Final states with at least one muon or one electron are considered. No significant excess over standard model expectations is observed, and lower limits on the mass of VLQs are derived. The lower limits range from 400 to 1800 GeV, depending on the single-production cross section and the VLQ branching fractions B to W, Z, and Higgs bosons. When considering pair production alone, VLQs with masses below 845 GeV are excluded for BðWÞ ¼ 1.0, and below 685 GeV for BðWÞ ¼ 0.5, BðZÞ ¼ BðHÞ ¼ 0.25. The results are more stringent than those previously obtained for single and pair production of VLQs coupled to light quarks.
format	Article
author	Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Asilar, Ece Bergauer, Thomas Md. Ali, Mohd. Adli
author_facet	Sirunyan, A. M. Tumasyan, A. R. Adam, Wolfgang Asilar, Ece Bergauer, Thomas Md. Ali, Mohd. Adli
author_sort	Sirunyan, A. M.
title	Search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 TeV
title_short	Search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 TeV
title_full	Search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 TeV
title_fullStr	Search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 TeV
title_full_unstemmed	Search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 TeV
title_sort	search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 tev
publisher	American Physical Society
publishDate	2018
url	http://irep.iium.edu.my/65674/ http://irep.iium.edu.my/65674/ http://irep.iium.edu.my/65674/ http://irep.iium.edu.my/65674/1/65674_Search%20for%20vectorlike%20light-flavor%20quark%20partners_article.pdf http://irep.iium.edu.my/65674/2/65674_Search%20for%20vectorlike%20light-flavor%20quark%20partners_scopus.pdf
first_indexed	2023-09-18T21:33:10Z
last_indexed	2023-09-18T21:33:10Z
_version_	1777412646630326272

Search for vectorlike light-flavor quark partners in proton-proton collisions at s =8 TeV

Similar Items