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Measurement of branching fractions of Λc+ →η Λπ+, η ς0π+, Λ (1670)π+, and η ς (1385)+
- Authors
- Lee, J.Y.; Tanida, K.; Kato, Y.; Kim, S.K.; Yang, S.B.; Adachi, I.; Ahn, J.K.; Aihara, H.; Al, Said S.; Asner, D.M.; Aushev, T.; Ayad, R.; Babu, V.; Bahinipati, S.; Behera, P.; Beleño, C.; Bennett, J.; Bessner, M.; Bhuyan, B.; Bilka, T.; Biswal, J.; Bonvicini, G.; Bozek, A.; Bračko, M.; Browder, T.E.; Campajola, M.; Cao, L.; Červenkov, D.; Chang, M.-C.; Chang, P.; Chekelian, V.; Chen, A.; Cheon, B.G.; Chilikin, K.; Cho, K.; Choi, S.-K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; De, Nardo G.; Di, Capua F.; DoleŽal, Z.; Dong, T.V.; Eidelman, S.; Epifanov, D.; Ferber, T.; Fulsom, B.G.; Garg, R.; Gaur, V.; Garmash, A.; Giri, A.; Goldenzweig, P.; Golob, B.; Hadjivasiliou, C.; Hartbrich, O.; Hayasaka, K.; Hayashii, H.; Hedges, M.T.; Hernandez, Villanueva M.; Hsu, C.-L.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Jacobs, W.W.; Jang, E.-J.; Jia, S.; Jin, Y.; Joo, C.W.; Joo, K.K.; Kang, K.H.; Karyan, G.; Kichimi, H.; Kiesling, C.; Kim, B.H.; Kim, D.Y.; Kim, K.-H.; Kim, K.T.; Kim, S.H.; Kim, Y.J.; Kim, Y.-K.; Kinoshita, K.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; KriŽan, P.; Kroeger, R.; Krokovny, P.; Kuhr, T.; Kulasiri, R.; Kumara, K.; Kuzmin, A.; Kwon, Y.-J.; Lee, S.C.; Li, C.H.; Li, L.K.; Li, Y.B.; Li, Gioi L.; Libby, J.; Lieret, K.; Liptak, Z.; Liventsev, D.; Luo, T.; Macqueen, C.; Masuda, M.; Matsuda, T.; Matvienko, D.; Merola, M.; Miyabayashi, K.; Mizuk, R.; Mohanty, G.B.; Moon, T.J.; Mori, T.; Mussa, R.; Nakano, T.; Nakao, M.; Natochii, A.; Nayak, M.; Niiyama, M.; Nisar, N.K.; Nishida, S.; Ogawa, K.; Ogawa, S.; Olsen, S.L.; Ono, H.; Onuki, Y.; Oskin, P.; Pakhlov, P.; Pakhlova, G.; Pardi, S.; Park, S.-H.; Patra, S.; Paul, S.; Pedlar, T.K.; Pestotnik, R.; Piilonen, L.E.; Podobnik, T.; Popov, V.; Prencipe, E.; Prim, M.T.; Rostomyan, A.; Rout, N.; Russo, G.; Sahoo, D.; Sakai, Y.; Sandilya, S.; Sangal, A.; Santelj, L.; Savinov, V.; Schnell, G.; Schueler, J.; Schwanda, C.; Schwartz, A.J.; Seidl, R.; Seino, Y.; Senyo, K.; Sevior, M.E.; Shapkin, M.; Shebalin, V.; Shiu, J.-G.; Shwartz, B.; Sokolov, A.; Solovieva, E.; Stanič, S.; Starič, M.; Stottler, Z.S.; Sumihama, M.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tamponi, U.; Tenchini, F.; Uchida, M.; Uglov, T.; Uno, S.; Usov, Y.; Vahsen, S.E.; Van, Tonder R.; Varner, G.; Vinokurova, A.; Vorobyev, V.; Vossen, A.; Wang, C.H.; Wang, E.; Wang, M.-Z.; Wang, P.; Watanabe, M.; Watanuki, S.; Wehle, S.; Wiechczynski, J.; Xu, X.; Yabsley, B.D.; Yan, W.; Ye, H.; Yelton, J.; Yin, J.H.; Yuan, C.Z.; Yusa, Y.; Zhang, Z.P.; Zhilich, V.; Zhukova, V.; Zhulanov, V.; (Belle Collaboration)
- Issue Date
- 15-Mar-2021
- Publisher
- American Physical Society
- Citation
- Physical Review D, v.103, no.5
- Journal Title
- Physical Review D
- Volume
- 103
- Number
- 5
- ISSN
- 2470-0010
- Abstract
- 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. © 2021 authors. Published by the American Physical Society.
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Related Researcher
- Kim, D. Y.
- College of Natural Sciences (Department of Physics)