First determination of the spin and parity of the charmed-strange baryon Xi(c) (2970)(+)
- Authors
- Moon, T. J.; Tanida, K.; Kato, Y.; Kim, S. K.; Adachi, I; Ahn, J. K.; Aihara, H.; Al Said, S.; Asner, D. M.; Aulchenko, V; Aushev, T.; Ayad, R.; Babu, V; Bahinipati, S.; Behera, P.; Beleno, C.; Bennett, J.; Bessner, M.; Bhuyan, B.; Bilka, T.; Biswal, J.; Bonvicini, G.; Bozek, A.; Bracko, M.; Browder, T. E.; Campajola, M.; Cao, L.; Cervenkov, D.; Chang, M-C; Chang, P.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, K.; Choi, S-K; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Dash, N.; De Nardo, G.; Di Capua, F.; Dolezal, Z.; Dong, T., V; Dossett, D.; Dubey, S.; Eidelman, S.; Epifanov, D.; Ferber, T.; Fulsom, B. G.; Garg, R.; Gaur, V; Gabyshev, N.; Garmash, A.; Giri, A.; Goldenzweig, P.; Golob, B.; Hadjivasiliou, C.; Hartbrich, O.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Hou, W-S; Hsu, C-L; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jia, S.; Jin, Y.; Joo, K. K.; Kang, K. H.; Karyan, G.; Kawasaki, T.; Kichimi, H.; Kiesling, C.; Kim, B. H.; Kim, D. Y.; Kim, K. T.; Kim, S. H.; Kim, Y. J.; Kim, Y-K; Kimmel, T. D.; Kinoshita, K.; Kodys, P.; Korpar, S.; Kotchetkov, D.; Krizan, P.; Kroeger, R.; Krokovny, P.; Kuhr, T.; Kumar, R.; Kumara, K.; Kuzmin, A.; Kwon, Y-J; Lee, I. S.; Lee, J. Y.; Lee, S. C.; Li, L. K.; Li, Y. B.; Li Gioi, L.; Libby, J.; Liptak, Z.; Liventsev, D.; Luo, T.; MacQueen, C.; Masuda, M.; Matsuda, T.; Matvienko, D.; Merola, M.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Mohanty, S.; Mori, T.; Mussa, R.; Nakano, T.; Nakao, M.; Natkaniec, Z.; Natochii, A.; Nayak, M.; Niiyama, M.; Nisar, N. K.; Nishida, S.; Ogawa, K.; Ogawa, S.; Ono, H.; Pakhlov, P.; Pakhlova, G.; Pardi, S.; Park, H.; Park, S-H; Patra, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Podobnik, T.; Popov, V; Prencipe, E.; Prim, M. T.; Ritter, M.; Rout, N.; Russo, G.; Sahoo, D.; Sakai, Y.; Sandilya, S.; Sangal, A.; Santelj, L.; Savinov, V; Schnell, G.; Schueler, J.; Schwanda, C.; Seidl, R.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Shen, C. P.; Shiu, J-G; Shwartz, B.; Solovieva, E.; Sumihama, M.; Sumisawa, K.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tamponi, U.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Vahsen, S. E.; Van Tonder, R.; Varner, G.; Vinokurova, A.; Vorobyev, V.; Vossen, A.; Wang, C. H.; Wang, E.; Wang, M-Z; Wang, P.; Wehle, S.; Wiechczynski, J.; Xu, X.; Yabsley, B. D.; Yang, S. B.; Ye, H.; Yelton, J.; Yin, J. H.; Yuan, C. Z.; Zhang, Z. P.; Zhilich, V; Zhukova, V; Zhulanov, V
- Issue Date
- 16-Jun-2021
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW D, v.103, no.11
- Journal Title
- PHYSICAL REVIEW D
- Volume
- 103
- Number
- 11
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/41348
- DOI
- 10.1103/PhysRevD.103.L111101
- ISSN
- 2470-0010
- Abstract
- We report results from a study of the spin and parity of Xi(c)(2970)(+) using a 980 fb(-1) data sample collected by the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. The decay angle distributions in the chain Xi(c)(2970)(+) -> Xi(c) (2645)(0)pi(+) -> Xi c(+) pi(-)pi(+) are analyzed to determine the spin of this charmed-strange baryon. The angular distributions strongly favor the Xi(c) (2970)(+) spin J = 1/2 over 3/2 or 5/2, under an assumption that the lowest partial wave dominates in the decay. We also measure the ratio of Xi(c) (2970)(+) decay branching fractions R= B[Xi(c) (2970)(+) -> Xi(c)(2645)(0)(pi)+]/B[Xi(c)(2970)(+) -> Xi('0)(c)pi(+)] 1..67 +/- 0.29(stat)(-0.09)(+0.15)(syst)+/- 0.25(IS), where the last uncertainty is due to possible isospin-symmetry-breaking effects. This R value favors the spin-parity J(P) = 1/2(+) with the spin of the light-quark degrees of freedom s(l) = 0. This is the first determination of the spin and parity of a charmed-strange baryon.
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