Search for heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets in proton-proton collisions at √s=13 TeV

A search for new particles has been conducted using events with two high transverse momentum τ leptons that decay hadronically and at least two energetic jets. The analysis is performed using data from proton-proton collisions at √ s = 13 TeV, collected by the CMS experiment at the LHC in 2016 a...

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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/72607/ http://irep.iium.edu.my/72607/ http://irep.iium.edu.my/72607/ http://irep.iium.edu.my/72607/2/72607_Search%20for%20heavy%20neutrinos%20and%20third-generation_article.pdf http://irep.iium.edu.my/72607/13/72607_Search%20for%20heavy%20neutrinos%20and%20third-generation_scopus_new.pdf http://irep.iium.edu.my/72607/14/72607_Search%20for%20heavy%20neutrinos%20and%20third-generation_wos.pdf

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spelling	iium-726072019-07-25T08:11:44Z http://irep.iium.edu.my/72607/ Search for heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets 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 for new particles has been conducted using events with two high transverse momentum τ leptons that decay hadronically and at least two energetic jets. The analysis is performed using data from proton-proton collisions at √ s = 13 TeV, collected by the CMS experiment at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1 . The observed data are consistent with standard model expectations. The results are interpreted in the context of two physics models. The first model involves righthanded charged bosons, WR, that decay to heavy right-handed Majorana neutrinos, N` (` = e, µ, τ ), arising in a left-right symmetric extension of the standard model. The model considers that Ne and Nµ are too heavy to be detected at the LHC. Assuming that the Nτ mass is half of the WR mass, masses of the WR boson below 3.50 TeV are excluded at 95% confidence level. Exclusion limits are also presented considering different scenarios for the mass ratio between Nτ and WR, as a function of WR mass. In the second model, pair production of third-generation scalar leptoquarks that decay into τ τbb is considered, resulting in an observed exclusion region with leptoquark masses below 1.02 TeV, assuming a 100% branching fraction for the leptoquark decay to a τ lepton and a bottom quark. These results represent the most stringent limits to date on these models. Springer Nature 2019-03-01 Article PeerReviewed application/pdf en http://irep.iium.edu.my/72607/2/72607_Search%20for%20heavy%20neutrinos%20and%20third-generation_article.pdf application/pdf en http://irep.iium.edu.my/72607/13/72607_Search%20for%20heavy%20neutrinos%20and%20third-generation_scopus_new.pdf application/pdf en http://irep.iium.edu.my/72607/14/72607_Search%20for%20heavy%20neutrinos%20and%20third-generation_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 heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets in proton-proton collisions at √s=13 TeV. Journal of High Energy Physics, 2019 (3). pp. 1-40. ISSN 1126-6708 E-ISSN 1029-8479 https://link.springer.com/content/pdf/10.1007%2FJHEP03%282019%29170.pdf 10.1007/JHEP03(2019)170
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 heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets in proton-proton collisions at √s=13 TeV
description	A search for new particles has been conducted using events with two high transverse momentum τ leptons that decay hadronically and at least two energetic jets. The analysis is performed using data from proton-proton collisions at √ s = 13 TeV, collected by the CMS experiment at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1 . The observed data are consistent with standard model expectations. The results are interpreted in the context of two physics models. The first model involves righthanded charged bosons, WR, that decay to heavy right-handed Majorana neutrinos, N` (` = e, µ, τ ), arising in a left-right symmetric extension of the standard model. The model considers that Ne and Nµ are too heavy to be detected at the LHC. Assuming that the Nτ mass is half of the WR mass, masses of the WR boson below 3.50 TeV are excluded at 95% confidence level. Exclusion limits are also presented considering different scenarios for the mass ratio between Nτ and WR, as a function of WR mass. In the second model, pair production of third-generation scalar leptoquarks that decay into τ τbb is considered, resulting in an observed exclusion region with leptoquark masses below 1.02 TeV, assuming a 100% branching fraction for the leptoquark decay to a τ lepton and a bottom quark. These results represent the most stringent limits to date on these models.
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 heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets in proton-proton collisions at √s=13 TeV
title_short	Search for heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets in proton-proton collisions at √s=13 TeV
title_full	Search for heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets in proton-proton collisions at √s=13 TeV
title_fullStr	Search for heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets in proton-proton collisions at √s=13 TeV
title_full_unstemmed	Search for heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets in proton-proton collisions at √s=13 TeV
title_sort	search for heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets in proton-proton collisions at √s=13 tev
publisher	Springer Nature
publishDate	2019
url	http://irep.iium.edu.my/72607/ http://irep.iium.edu.my/72607/ http://irep.iium.edu.my/72607/ http://irep.iium.edu.my/72607/2/72607_Search%20for%20heavy%20neutrinos%20and%20third-generation_article.pdf http://irep.iium.edu.my/72607/13/72607_Search%20for%20heavy%20neutrinos%20and%20third-generation_scopus_new.pdf http://irep.iium.edu.my/72607/14/72607_Search%20for%20heavy%20neutrinos%20and%20third-generation_wos.pdf
first_indexed	2023-09-18T21:42:52Z
last_indexed	2023-09-18T21:42:52Z
_version_	1777413256701280256

Search for heavy neutrinos and third-generation leptoquarks in hadronic states of two τ leptons and two jets in proton-proton collisions at √s=13 TeV

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