Please use this identifier to cite or link to this item:
https://hdl.handle.net/11147/11641
Title: | Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at root s=13 TeV | Authors: | CMS Collaboration Karapınar, Güler |
Keywords: | CMS Standard model EWK |
Issue Date: | 2021 | Publisher: | Elsevier | Abstract: | A search is performed for the rare decay W-+/--> pi(+/-)gamma in proton-proton collisions at root s = 13 TeV. Data corresponding to an integrated luminosity of 137 fb(-1) were collected during 2016 to 2018 with the CMS detector. This analysis exploits a novel search strategy based on W boson production in top quark pair events. An inclusive search for the W-+/--> pi(+/-)gamma decay is not optimal at the LHC because of the high trigger thresholds. Instead, a trigger selection is exploited in which the W boson originating from one of the top quarks is used to tag the event in a leptonic decay. The W boson emerging from the other top quark is used to search for the W-+/--> pi(+/-)gamma signature. Such decays are characterized by an isolated track pointing to a large energy deposit, and by an isolated photon of large transverse momentum. The presence of b quark jets reduces the background from the hadronization of light-flavor quarks and gluons. The W-+/- -> pi(+/-)gamma decay is not observed. An upper exclusion limit is set to this branching fraction, corresponding to 1.50 x 10(-5) at 95% confidence level, whereas the expected upper exclusion limit is 0.85(-0.29)(+0.52) x 10(-5). (C) 2021 The Author(s). Published by Elsevier B.V. | URI: | https://doi.org/10.1016/j.physletb.2021.136409 https://hdl.handle.net/11147/11641 |
ISSN: | 0370-2693 1873-2445 |
Appears in Collections: | Rectorate / Rektörlük WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
Show full item record
CORE Recommender
SCOPUSTM
Citations
3
checked on Dec 2, 2023
WEB OF SCIENCETM
Citations
1
checked on Jun 19, 2023
Page view(s)
14
checked on Nov 27, 2023
Google ScholarTM
Check
Altmetric
Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.