Observation of B+-->LambdaLambdaK+.
We report the first observation of the charmless hyperonic B decay, B+-->LambdaLambdaK+, using a 140 fb(-1) data sample recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB (e+)(e-) collider. The measured branching fraction is B(B+-->LambdaLambdaK+) = (2.91(+0.90)(-0.70) +/- 0.38) x 10(-6). We also perform a search for the related decay mode B+-->LambdaLambdapi+, but do not find a significant signal. We set a 90% confidence-level upper limit of B(B+-->LambdaLambdapi+) < 2.8 x 10(-6).
Lee
Y-J
YJ
Department of Physics, National Taiwan University, Taipei.
Wang
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Abe
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Abe
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Aulchenko
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Danilov
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Higuchi
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Hinz
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Hoshi
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Hou
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Imoto
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Inami
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Ishikawa
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Itoh
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Iwasaki
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Iwasaki
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Kang
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Kang
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Katayama
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Kawai
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Lesiak
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Li
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Lin
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Macnaughton
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Majumder
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Mandl
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Matsumoto
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Matyja
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Mikami
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Mitaroff
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Miyabayashi
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Miyata
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Mizuk
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Mori
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Nagamine
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Nagasaka
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Nakadaira
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Nakao
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Nishida
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Nitoh
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Ogawa
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Ohshima
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Okabe
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Okuno
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Olsen
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Ostrowicz
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Ozaki
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Pakhlov
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Parslow
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Piilonen
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Sagawa
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Saitoh
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Schneider
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Schümann
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Semenov
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Senyo
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Sidorov
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Soni
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Sumisawa
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Sumiyoshi
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Tajima
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Takasaki
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Tamai
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Tamura
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Tanaka
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Taylor
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Teramoto
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Tovey
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Tsuboyama
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Uehara
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Uglov
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Ueno
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Uno
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Varner
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Varvell
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Wang
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Watanabe
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Yamada
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Yamaguchi
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Yamauchi
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Yuan
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Yusa
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Zhang
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Zhang
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Ziegler
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Zontar
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