Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на этот ресурс:
http://earchive.tpu.ru/handle/11683/72487
Название: | Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at √s=13TeV |
Авторы: | Sirunyan, А. М. Tumasyan, A. R. Adam, Wolfgang Tyurin, Nikolay Evgenjevich Babaev, Anton Anatoljevich Okhotnikov, Vitaly Vladimirovich Sukhikh, Leonid Grigorievich |
Ключевые слова: | CMS; standard model; EWK |
Дата публикации: | 2021 |
Издатель: | Elsevier |
Библиографическое описание: | Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at √s=13TeV / А. М. Sirunyan, A. R. Tumasyan, W. Adam [et al.] // Physics Letters B. — 2021. — Vol. 819. — [136409, 24 p.]. |
Аннотация: | A search is performed for the rare decay W±→π±γ in proton-proton collisions at √s =13TeV. Data corresponding to an integrated luminosity of 137fb−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±→π±γ 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±→π±γ 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±→π±γ decay is not observed. An upper exclusion limit is set to this branching fraction, corresponding to 1.50×10−5 at 95% confidence level, whereas the expected upper exclusion limit is 0.85−0.29+0.52×10−5. |
URI: | http://earchive.tpu.ru/handle/11683/72487 |
Располагается в коллекциях: | Репринты научных публикаций |
Файлы этого ресурса:
Файл | Описание | Размер | Формат | |
---|---|---|---|---|
reprint-nw-38211.pdf | 721,67 kB | Adobe PDF | Просмотреть/Открыть |
Все ресурсы в архиве электронных ресурсов защищены авторским правом, все права сохранены.