dc.description.abstract | 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. | es_ES |
dc.description.sponsorship | We thank the KEKB group for the excellent operation of
the accelerator; the KEK cryogenics group for the efficient
operation of the solenoid; the KEK computer group and
the Pacific Northwest National Laboratory (PNNL)
Environmental Molecular Sciences Laboratory (EMSL)
computing group for strong computing support; and the
National Institute of Informatics and Science Information
NETwork 5 (SINET5) for valuable network support. We
acknowledge support from the Ministry of Education,
Culture, Sports, Science, and Technology (MEXT) of Japan, the Japan Society for the Promotion of Science
(JSPS), and the Tau-Lepton Physics Research Center
of Nagoya University; the Australian Research Council
including Grants No. DP180102629, No. DP170102389,
No. DP170102204, No. DP150103061, and
No. FT130100303; the Austrian Science Fund (FWF);
the National Natural Science Foundation of China under
Contracts No. 11435013, No. 11475187, No. 11521505,
No. 11575017, No. 11675166, No. 11705209,
No. 11761141009, No. 11975076, and No. 12042509;
the Key Research Program of Frontier Sciences, Chinese
Academy of Sciences (CAS), Grant No. QYZDJ-SSWSLH011; the CAS Center for Excellence in Particle Physics
(CCEPP); the Shanghai Pujiang Program under Grant
No. 18PJ1401000; the Ministry of Education, Youth and
Sports of the Czech Republic under Contract
No. LTT17020; the Carl Zeiss Foundation, the Deutsche
Forschungsgemeinschaft, the Excellence Cluster Universe,
and the VolkswagenStiftung; the Department of Science and
Technology of India; the Istituto Nazionale di Fisica
Nucleare of Italy; the National Research Foundation
(NRF) of Korea Grants No. 2016R1D1A1B01010135,
No. 2016R1D1A1B02012900, No. 2018R1A2B3003643,
No. 2018R1A6A1A06024970, No. 2018R1D1A1B07047294,
No. 2019K1A3A7A09033840, and
No. 2019R1I1A3A01058933; the Radiation Science
Research Institute, the Foreign Large-size Research
Facility Application Supporting Project, the Global
Science Experimental Data Hub Center of the Korea
Institute of Science and Technology Information and
KREONET/GLORIAD; the Polish Ministry of Science
and Higher Education and the National Science Center;
the Ministry of Science and Higher Education of the Russian
Federation, Agreement No. 14.W03.31.0026; University of
Tabuk research grants No. S-1440-0321, No. S-0256-1438,
and No. S-0280-1439 (Saudi Arabia); the Slovenian
Research Agency; Ikerbasque, the Basque Foundation for
Science, Spain; the Swiss National Science Foundation; the
Ministry of Education and the Ministry of Science and
Technology of Taiwan; and the United States Department of
Energy and the National Science Foundation | es_ES |