dc.contributor | Yerevan Physics Institute | |
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dc.date.accessioned | 2022-05-01T07:29:18Z | |
dc.date.accessioned | 2022-12-20T03:39:03Z | |
dc.date.available | 2022-05-01T07:29:18Z | |
dc.date.available | 2022-12-20T03:39:03Z | |
dc.date.created | 2022-05-01T07:29:18Z | |
dc.date.issued | 2021-08-10 | |
dc.identifier | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 819. | |
dc.identifier | 0370-2693 | |
dc.identifier | http://hdl.handle.net/11449/233313 | |
dc.identifier | 10.1016/j.physletb.2021.136409 | |
dc.identifier | 2-s2.0-85111246735 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/5413412 | |
dc.description.abstract | 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. | |
dc.language | eng | |
dc.relation | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | |
dc.source | Scopus | |
dc.subject | CMS | |
dc.subject | EWK | |
dc.subject | Standard model | |
dc.title | Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at s=13TeV | |
dc.type | Artículos de revistas | |