Measurements of the branching fractions of Lambda(+)(c) -> p eta and Lambda(+)(c) -> p pi(0) decays at Belle

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10439864" target="_blank" >RIV/00216208:11320/21:10439864 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_Tqmza57Rw" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_Tqmza57Rw</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.103.072004" target="_blank" >10.1103/PhysRevD.103.072004</a>

Result language
angličtina
Original language name
Measurements of the branching fractions of Lambda(+)(c) -> p eta and Lambda(+)(c) -> p pi(0) decays at Belle
Original language description
We report measurements of the branching fractions of singly Cabibbo-suppressed decays Lambda(+)(c) -> p eta and Lambda(+)(c) -> p pi(0) 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 collidcr. A clear Lambda(+)(c) signal is seen in the invariant mass distribution of p eta. The fitted number of signal events of the Lambda(+)(c) -> p eta process is 7734 +/- 263; from this, we measure the ratio of branching fractions B(Lambda(+ )(c) -> p eta)/ B(Lambda(+)(c) -> p K- pi(+)) = [2.258 +/- 0.077(stat) +/- 0.122(syst)] x 10(-2), from which we infer the branching fraction B(Lambda(+)(c) -> p eta) = [1.42 +/- 0.05(stat) +/- 0.11(syst)] x 10(-3). In addition, no significant signal for Lambda(+)(c)-> p pi(0) is found, so an upper limit on the branching fraction of B(Lambda(+)(c) -> p eta(0)) < 8.0 x 10(-5) at a 90% credibility level is set, more than 3 times better than the best current upper limit.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10300 - Physical sciences

Project
<a href="/en/project/LTT17020" target="_blank" >LTT17020: Study of Beyond Standard Model Physics with the International Experiment Belle II in Japan</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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