Publication: Measurements of the branching fractions of Λc+ →pη and Λc+ →pπ0 decays at Belle
Дата
2021
Авторы
Li, S. X.
Shen, C. P.
Adachi, I.
Ahn, J. K.
Pakhlov, P.
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Аннотация
© 2021 authors. Published by the American Physical Society.We report measurements of the branching fractions of singly Cabibbo-suppressed decays Λc+→pη and Λc+→pπ0 using the full Belle data sample corresponding to an integrated luminosity of 980.6 fb-1. The data were collected by the Belle detector at the KEKB e+e- asymmetric energy collider. A clear Λc+ signal is seen in the invariant mass distribution of pη. The fitted number of signal events of the Λc+→pη process is 7734±263; from this, we measure the ratio of branching fractions B(Λc+→pη)/B(Λc+→pK-π+)=[2.258±0.077(stat)±0.122(syst)]×10-2, from which we infer the branching fraction B(Λc+→pη)=[1.42±0.05(stat)±0.11(syst)]×10-3. In addition, no significant signal for Λc+→pπ0 is found, so an upper limit on the branching fraction of B(Λc+→pπ0)<8.0×10-5 at a 90% credibility level is set, more than 3 times better than the best current upper limit.
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Measurements of the branching fractions of Λc+ →pη and Λc+ →pπ0 decays at Belle / Li, S.X. [et al.] // Physical Review D. - 2021. - 103. - № 7. - 10.1103/PhysRevD.103.072004
URI
https://www.doi.org/10.1103/PhysRevD.103.072004
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https://www.scopus.com/record/display.uri?eid=2-s2.0-85104683173&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000648576600001
https://openrepository.mephi.ru/handle/123456789/23933