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Search for the production of an excited bottom quark decaying to $tW$ in proton-proton collisions at $ s=8 $ TeV

Search for the production of an excited bottom quark decaying to $tW$ in proton-proton collisions at $ s=8 $ TeV
Search for the production of an excited bottom quark decaying to $tW$ in proton-proton collisions at $ s=8 $ TeV
A search is presented for a singly produced excited bottom quark (b*) decaying to a top quark and a W boson in the all-hadronic, lepton+jets, and dilepton final states in proton-proton collisions at s √ =8
s=8
TeV recorded by the CMS experiment at the CERN LHC. Data corresponding to an integrated luminosity of 19.7 fb−1 are used. No significant excess of events is observed with respect to standard model expectations. We set limits at 95% confidence on the product of the b* quark production cross section and its branching fraction to tW. The cross section limits are interpreted for scenarios including left-handed, right-handed, and vector-like couplings of the b* quark and are presented in the two-dimensional coupling plane based on the production and decay coupling constants. The masses of the left-handed, right-handed, and vector-like b* quark states are excluded at 95% confidence below 1390, 1430, and 1530 GeV, respectively, for benchmark couplings. This analysis gives the most stringent limits on the mass of the b∗ quark to date.
1029-8479
166
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

The CMS Collaboration (2016) Search for the production of an excited bottom quark decaying to $tW$ in proton-proton collisions at $ s=8 $ TeV. Journal of High Energy Physics, 01, 166. (doi:10.1007/JHEP01(2016)166).

Record type: Article

Abstract

A search is presented for a singly produced excited bottom quark (b*) decaying to a top quark and a W boson in the all-hadronic, lepton+jets, and dilepton final states in proton-proton collisions at s √ =8
s=8
TeV recorded by the CMS experiment at the CERN LHC. Data corresponding to an integrated luminosity of 19.7 fb−1 are used. No significant excess of events is observed with respect to standard model expectations. We set limits at 95% confidence on the product of the b* quark production cross section and its branching fraction to tW. The cross section limits are interpreted for scenarios including left-handed, right-handed, and vector-like couplings of the b* quark and are presented in the two-dimensional coupling plane based on the production and decay coupling constants. The masses of the left-handed, right-handed, and vector-like b* quark states are excluded at 95% confidence below 1390, 1430, and 1530 GeV, respectively, for benchmark couplings. This analysis gives the most stringent limits on the mass of the b∗ quark to date.

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More information

Accepted/In Press date: 13 January 2016
e-pub ahead of print date: 27 January 2016
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 408090
URI: http://eprints.soton.ac.uk/id/eprint/408090
ISSN: 1029-8479
PURE UUID: 9beb3002-dd0c-4b4a-91df-100420d5806e
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 11 May 2017 01:08
Last modified: 22 Nov 2021 02:55

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Contributors

Author: Vardan Khachatryan
Corporate Author: The CMS Collaboration

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