Observation of in decays

Bala, A.*; Tanida, Kiyoshi ; Belle Collaboration*; 174 of others*

We report the first observation of and evidence for . We measure the product of branching fractions for the former to be ${cal B}(B^0 to X(3872)(K^+pi^-))times {cal B}(X(3872) to J/psi pi^+ pi^-)=(7.9 pm 1.3({rm stat}) pm 0.4({rm syst}))times 10^{-6}$ and find that does not dominate the decay mode. We also measure ${cal B}(B^+ to X(3872)(K^0pi^+))times {cal B}(X(3872) to J/psi pi^+ pi^-)=(10.6 pm 3.0({rm stat}) pm 0.9({rm syst})) times 10^{-6}$ . This study is based on the full data sample of 711 ${rm fb^{-1}}$ ( $772 times 10^6 ; Bbar{B}$ pairs) collected at the resonance with the Belle detector at the KEKB collider.

Language	:	English
Journal	:	Physical Review D
Volume	:	91
Number	:	5
Pages	:	p.051101_1 - 051101_7
Publication Year/Month	:	2015/03
Meeting title	:
Held date	:
Location (city)	:
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Patent information	:
PDF	:	AA2015-0715.pdf:0.33MB
Paper URL	:	https://doi.org/10.1103/PhysRevD.91.051101
DOI for research data	:
Keywords	:	ハドロン分光
Research Facility	:
Press Release	:
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. : AA20150715
JAEA Abstracts No. : 44000231
Paper Submission No. : 16920

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