Observation of $B^0 to p bar{Lambda}D^{(*)-}$

Chang, Y. Y.*; Tanida, Kiyoshi ; Belle Collaboration*; 170 of others*

We report the first observation of the decays $B^0 to p bar{Lambda}D^{(*)-}$ . The data sample of 711 fb $^{-1}$ used in this analysis corresponds to pairs, collected at the resonance by the Belle detector at the KEKB asymmetric-energy collider. We observe and excesses of events for the two decay modes and measure the branching fractions of $B^0 to p bar{Lambda}D^{-}$ and $B^0 to p bar{Lambda}D^{*-}$ to be $(25.1 pm 2.6 pm 3.5) times 10^{-6}$ and $(33.6 pm 6.3 pm 4.4) times 10^{-6}$ , respectively, where the first uncertainties are statistical and the second are systematic. These results are not compatible with the predictions based on the generalized factorization approach. In addition, a threshold enhancement in the dibaryon () system is observed, consistent with that observed in similar decays.

Language	:	English
Journal	:	Physical Review Letters
Volume	:	115
Number	:	22
Pages	:	p.221803_1 - 221803_8
Publication Year/Month	:	2015/11
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PDF	:	AA2015-0718.pdf:0.69MB
Paper URL	:	https://doi.org/10.1103/PhysRevLett.115.221803
DOI for research data	:
Keywords	:	ハドロン分光
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Article of JAEA R&D Review	:
Cooperating Institute	:	高エネルギー加速器研究機構

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Registration No. : AA20150718
JAEA Abstracts No. : 44000239
Paper Submission No. : 16928

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