Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at √s=13 TeV
Authors
Sirunyan, A. M.Tumasyan, A.
Adam, W.
Bergauer, T.
Dragicevic, M.
Adžić, Petar
Ćirković, Predrag
Đorđević, Miloš
Milenović, Predrag
Milošević, Jovan
Contributors
CMS CollaborationArticle (Published version)
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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, cor...responding to 1.50×10−5 at 95% confidence level, whereas the expected upper exclusion limit is 0.85−0.29+0.52×10−5.
Source:
Physics Letters B, 2021, 819 C, 136409-Note:
- CMS Collaboration (ukupan broj autora: 2352)
DOI: 10.1016/j.physletb.2021.136409
ISSN: 0370-2693
WoS: 000679259200060
Scopus: 2-s2.0-85111246735
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VinčaTY - JOUR AU - Sirunyan, A. M. AU - Tumasyan, A. AU - Adam, W. AU - Bergauer, T. AU - Dragicevic, M. AU - Adžić, Petar AU - Ćirković, Predrag AU - Đorđević, Miloš AU - Milenović, Predrag AU - Milošević, Jovan PY - 2021 UR - https://vinar.vin.bg.ac.rs/handle/123456789/10003 AB - 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. T2 - Physics Letters B T1 - Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at √s=13 TeV VL - 819 C SP - 136409 DO - 10.1016/j.physletb.2021.136409 ER -
@article{ author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan", year = "2021", 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.", journal = "Physics Letters B", title = "Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at √s=13 TeV", volume = "819 C", pages = "136409", doi = "10.1016/j.physletb.2021.136409" }
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at √s=13 TeV. in Physics Letters B, 819 C, 136409. https://doi.org/10.1016/j.physletb.2021.136409
Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at √s=13 TeV. in Physics Letters B. 2021;819 C:136409. doi:10.1016/j.physletb.2021.136409 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at √s=13 TeV" in Physics Letters B, 819 C (2021):136409, https://doi.org/10.1016/j.physletb.2021.136409 . .