Publication:
Measurement of branching fractions of Λc+ →η Λπ+, η ς0π+, Λ (1670)π+, and η ς (1385)+

Дата
2021
Авторы
Lee, J. Y.
Tanida, K.
Kato, Y.
Kim, S. K.
Pakhlov, P.
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Научные группы
Логотип проекта
Научная группа
Belle Collaboration
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Аннотация
© 2021 authors. Published by the American Physical Society.We report branching fraction measurements of four decay modes of the Λc+ baryon, each of which includes an η meson and a Λ baryon in the final state, and all of which are measured relative to the Λc+→pK-π+ decay mode. The results are based on a 980 fb-1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. Two decays, Λc+→ης0π+ and Λ(1670)π+, are observed for the first time, while the measurements of the other decay modes, Λc+→ηΛπ+ and ης(1385)+, are more precise than those made previously. We obtain relative branching fractions of B(Λc+→ηΛπ+)/B(Λc+→pK-π+)=0.293±0.003±0.014, B(Λc+→ης0π+)/B(Λc+→pK-π+)=0.120±0.006±0.010, B(Λc+→Λ(1670)π+)×B(Λ(1670)→ηΛ)/B(Λc+→pK-π+)=(5.54±0.29±0.73)×10-2, and B(Λc+→ης(1385)+)/B(Λc+→pK-π+)=0.192±0.006±0.016. The mass and width of the Λ(1670) are also precisely determined to be 1674.3±0.8±4.9 MeV/c2 and 36.1±2.4±4.8 MeV, respectively, where the uncertainties are statistical and systematic, respectively.
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Measurement of branching fractions of Λc+ →η Λπ+, η ς0π+, Λ (1670)π+, and η ς (1385)+ / Lee, J.Y. [et al.] // Physical Review D. - 2021. - 103. - № 5. - 10.1103/PhysRevD.103.052005
URI
https://www.doi.org/10.1103/PhysRevD.103.052005
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85103319874&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000648528800001
 https://openrepository.mephi.ru/handle/123456789/23851
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