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  • Observation of Cabibbo-supp...
    Abe, K.; Ahn, Byoung Sup; Aihara, H.; Akatsu, M.; Behari, S.; Behera, P.K.; Bondar, A.; Browder, T.E.; Casey, B.C.K.; Chang, P.; Cheon, B.G.; Choi, S.-K.; Dong, L.Y.; Eidelman, S.; Eiges, V.; Fukushima, M.; Gershon, T.; Guo, R.; Hamasaki, H.; Handa, F.; Hara, T.; Hastings, N.C.; Hazumi, M.; Heenan, E.M.; Higuchi, I.; Higuchi, T.; Hojo, T.; Hoshi, Y.; Hoshina, K.; Hsu, S.-C.; Huang, H.-C.; Igarashi, Y.; Inami, K.; Itoh, R.; Iwasaki, Y.; Kagan, R.; Kang, J.H.; Katayama, N.; Kawai, H.; Kawamura, N.; Kichimi, H.; Kim, D.W.; Kim, H.O.; Kim, T.H.; Korpar, S.; Kumar, S.; Lange, J.S.; Lee, S.H.; Lu, R.-S.; Mikami, Y.; Miyata, H.; Mori, S.; Nagashima, Y.; Nakadaira, T.; Natkaniec, Z.; Nishida, S.; Noguchi, S.; Ogawa, S.; Ohshima, T.; Okabe, T.; Olsen, S.L.; Ostrowicz, W.; Ozaki, H.; Palka, H.; Park, C.S.; Park, H.; Park, K.S.; Peak, L.S.; Piilonen, L.E.; Rybicki, K.; Ryuko, J.; Sakamoto, H.; Singh, J.B.; Stanič, S.; Sugiyama, A.; Sumisawa, K.; Sumiyoshi, T.; Suzuki, K.; Suzuki, S.Y.; Swain, S.K.; Takasaki, F.; Tamai, K.; Tanaka, M.; Tanaka, Y.; Taylor, G.N.; Ueno, K.; Uno, S.; Vahsen, S.E.; Wang, J.G.; Won, E.; Yabsley, B.D.; Yamaga, M.; Yamaguchi, A.; Yamashita, Y.; Yanaka, S.; Yuan, Y.; Zhang, C.C.; Zhao, H.W.; Zhilich, V.; Žontar, D.

    Physics letters. B, 01/2002, Volume: 524, Issue: 1-2
    Journal Article

    We present measurements of the Cabibbo-suppressed decays Λc+→Λ0K+ and Λc+→Σ0K+ (both first observations), Λc+→Σ+K+π− (seen with large statistics for the first time), Λc+→pK+K− and Λc+→pφ (measured with improved accuracy). Improved branching ratio measurements for the decays Λc+→Σ+K+K− and Λc+→Σ+φ, which are attributed to W-exchange diagrams, are shown. We also present the first evidence for Λc+→Ξ(1690)0K+ and set an upper limit on the non-resonant decay Λc+→Σ+K+K−. This analysis was performed using 32.6 fb−1 of data collected by the Belle detector at the asymmetric e+e− collider KEKB.