Search for Λc+ →φpπ0 and branching fraction measurement of Λc+ →k-π+pπ0

Date Issued
01-09-2017
Author(s)
Pal, B.
Schwartz, A. J.
Adachi, I.
Aihara, H.
Al Said, S.
Asner, D. M.
Aushev, T.
Ayad, R.
Badhrees, I.
Bakich, A. M.
Bansal, V.
Behera, P.
Berger, M.
Bhardwaj, V.
Biswal, J.
Bobrov, A.
Bozek, A.
BraÄ ko, M.
Browder, T. E.
ÄŒervenkov, D.
Chekelian, V.
Chen, A.
Cheon, B. G.
Chilikin, K.
Cho, K.
Choi, S. K.
Choi, Y.
Cinabro, D.
Dash, N.
Di Carlo, S.
DoleŽal, Z.
Drásal, Z.
Eidelman, S.
Ferber, T.
Fulsom, B. G.
Gaur, V.
Gabyshev, N.
Garmash, A.
Goldenzweig, P.
Guido, E.
Hara, T.
Hayasaka, K.
Hayashii, H.
Hou, W. S.
Hsu, C. L.
Inami, K.
Ishikawa, A.
Itoh, R.
Jacobs, W. W.
Jaegle, I.
Jeon, H. B.
Jia, S.
Jin, Y.
Joffe, D.
Joo, K. K.
Karyan, G.
Kato, Y.
Kim, D. Y.
Kim, J. B.
Kim, K. T.
Kim, S. H.
Kim, Y. J.
Kinoshita, K.
Kodyš, P.
Korpar, S.
Kotchetkov, D.
Krokovny, P.
Kuhr, T.
Kulasiri, R.
Kwon, Y. J.
Li, C. H.
Li, L.
Li, Y.
Li Gioi, L.
Indian Institute of Technology, Madras
Liventsev, D.
Lubej, M.
Luo, T.
MacNaughton, J.
Matvienko, D.
Merola, M.
Miyabayashi, K.
Miyata, H.
Mizuk, R.
Mohanty, G. B.
Moon, H. K.
Mori, T.
Mussa, R.
Nakano, E.
Nakao, M.
Nanut, T.
Nath, K. J.
Nayak, M.
Niiyama, M.
Nishida, S.
Ogawa, S.
Ono, H.
Pakhlov, P.
Pakhlova, G.
Pardi, S.
DOI
Abstract
We have searched for the Cabibbo-suppressed decay Λc+→φpπ0 in e+e-collisions using a data sample corresponding to an integrated luminosity of 915 fb-1. The data were collected by the Belle experiment at the KEKB e+e-A symmetric-energy collider running at or near the Ï'(4S) and Ï'(5S) resonances. No significant signal is observed, and we set an upper limit on the branching fraction of B(Λc+→φpπ0)<15.3×10-5 at 90% confidence level. The contribution of nonresonant Λc+→K+K-pπ0 decays is found to be consistent with zero, and the corresponding upper limit on its branching fraction is set to be B(Λc+→K+K-pπ0)NR<6.3×10-5 at 90% confidence level. We also search for an intermediate hidden-strangeness pentaquark decay Ps+→φp. We see no evidence for this intermediate decay and set an upper limit on the product branching fraction of B(Λc+→Ps+π0)×B(Ps+→φp)<8.3×10-5 at 90% confidence level. Finally, we measure the branching fraction for the Cabibbo-favored decay Λc+→K-π+pπ0; the result is B(Λc+→K-π+pπ0)=(4.42±0.05(stat)±0.12(syst)±0.16(norm))%, which is the most precise measurement to date.
Volume
96