Journal article

Measurement of branching fractions of Delta( )(c) -> eta Lambda pi( ), eta Sigma(0)pi( ), Lambda(1670)pi( ), and eta Sigma(1385)( )

JY Lee, K Tanida, Y Kato, SK Kim, SB Yang, I Adachi, JK Ahn, H Aihara, S Al Said, DM Asner, T Aushev, R Ayad, V Babu, S Bahinipati, P Behera, C Beleno, J Bennett, M Bessner, B Bhuyan, T Bilka Show all



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+→p..

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University of Melbourne Researchers


Awarded by Australian Research Council

Awarded by National Natural Science Foundation of China

Awarded by Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)

Awarded by Shanghai Pujiang Program

Awarded by Ministry of Education, Youth and Sports of the Czech Republic

Awarded by National Research Foundation (NRF) of Korea

Awarded by Ministry of Science and Higher Education of the Russian Federation

Awarded by University of Tabuk (Saudi Arabia)

Awarded by NRF

Awarded by MEXT KAKENHI Grant

Funding Acknowledgements

We thank the KEKB group for the excellent operation of the accelerator; the KEK cryogenics group for the efficient operation of the solenoid; and 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, No. FT130100303; 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; 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; National Research Foundation (NRF) of Korea Grants No. 2016R1D1A1B01010135, No. 2016-R1D1A1B02012900, No. 2018R1A2B3003643, No. 2018R1A6A1A06024970, No. 2018R1D1A1-B07047294, No. 2019K1A3A7A09033840, No. 2019-R1I1A3A01058933; Radiation Science Research Institute, 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 14.W03.31.0026; University of Tabuk research Grants No. S-1440-0321, No. S-0256-1438, and No. S0280-1439 (Saudi Arabia); the Slovenian Research Agency; Ikerbasque, 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. J. Y. Lee and S. K. Kim were supported by NRF Grant No. 2016R1A2B3008343. S. B. Yang and J. K. Ahn acknowledges support from NRF Grants No. 2018R1A6A3A01012138 and No 2018R1A5A1025563. Y. Kato is supported by MEXT KAKENHI Grant No. JP19H05148.