Journal
PHYSICAL REVIEW D
Volume 103, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.103.072004
Keywords
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan
- Japan Society for the Promotion of Science (JSPS)
- Tau-Lepton Physics Research Center of Nagoya University
- Australian Research Council [DP180102629, DP170102389, DP170102204, DP150103061, FT130100303]
- Austrian Science Fund (FWF)
- National Natural Science Foundation of China [11435013, 11475187, 11521505, 11575017, 11675166, 11705209, 11761141009, 11975076, 12042509]
- Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) [QYZDJ-SSWSLH011]
- CAS Center for Excellence in Particle Physics (CCEPP)
- Shanghai Pujiang Program [18PJ1401000]
- Ministry of Education, Youth and Sports of the Czech Republic [LTT17020]
- Carl Zeiss Foundation
- Deutsche Forschungsgemeinschaft, the Excellence Cluster Universe
- VolkswagenStiftung
- Department of Science and Technology of India
- Istituto Nazionale di Fisica Nucleare of Italy
- National Research Foundation (NRF) of Korea [2016R1D1A1B01010135, 2016R1D1A1B02012900, 2018R1A2B3003643, 2018R1A6A1A06024970, 2018R1D1A1B07047294, 2019K1A3A7A09033840, 2019R1I1A3A01058933]
- Radiation Science Research Institute, the Foreign Large-size Research Facility Application Supporting Project
- Global Science Experimental Data Hub Center of the Korea Institute of Science and Technology Information
- KREONET/GLORIAD
- Polish Ministry of Science and Higher Education
- National Science Center
- Ministry of Science and Higher Education of the Russian Federation [14.W03.31.0026]
- University of Tabuk [S-1440-0321, S-0256-1438, S-0280-1439]
- Slovenian Research Agency
- Ikerbasque, the Basque Foundation for Science, Spain
- Swiss National Science Foundation
- Ministry of Education of Taiwan
- Ministry of Science and Technology of Taiwan
- United States Department of Energy
- National Science Foundation
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This study reports measurements of the branching fractions of Λ(+)(C) -> p eta and Λ(+)(C) -> p pi(0) decays using the full Belle data sample. A clear signal for Λ(+)(C) -> p eta is observed, with the measured branching fraction and ratio calculated. An upper limit on the branching fraction of Λ(+)(C) -> p pi(0) is also set at a 90% credibility level, improving upon existing limits.
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.
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