Measurements of the branching fractions ${cal B}(B^{-} to bar{Lambda}_{c}^{-} Xi_{c}^{'0})$ , ${cal B}(B^{-} to bar{Lambda}_{c}^{-} Xi_{c}(2645)^{0})$ and ${cal B}(B^{-} to bar{Lambda}_{c}^{-} Xi_{c}(2790)^{0})$

Li, Y.*; Tanida, Kiyoshi ; Belle Collaboration*; 175 of others*

Using the data sample of 711 fb $^{-1}$ of on-resonance data taken by the Belle detector at the KEKB asymmetric-energy electron-positron collider, we present the first measurements of branching fractions of the decays $B^{-} to bar{Lambda}_{c}^{-} Xi_{c}^{'0}$ , $B^{-} to bar{Lambda}_{c}^{-} Xi_{c}(2645)^{0}$ , and $B^{-} to bar{Lambda}_{c}^{-} Xi_{c}(2790)^{0}$ . The signal yields for these decays are extracted from the recoil mass spectrum of the system recoiling against $bar{Lambda}_{c}^{-}$ baryons in selected candidates. The branching fraction of $B^{-} to bar{Lambda}_{c}^{-} Xi_{c}(2790)^{0}$ is measured to be $(1.1 pm 0.4 pm 0.2)times 10^{-3}$ , where the first uncertainty is statistical and the second is systematic. The 90% credibility level upper limits on ${cal B}(B^{-} to bar{Lambda}_{c}^{-} Xi_{c}^{'0})$ and ${cal B}(B^{-} to bar{Lambda}_{c}^{-} Xi_{c}(2645)^{0})$ are determined to be $6.5times 10^{-4}$ and $7.9times 10^{-4}$ , respectively.

Language	:	English
Journal	:	Physical Review D
Volume	:	100
Number	:	11
Pages	:	p.112010_1 - 112010_8
Publication Year/Month	:	2019/12
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Paper URL	:	https://doi.org/10.1103/PhysRevD.100.112010
DOI for research data	:
Keywords	:	Hadron spectroscopy
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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. : AA20200187
JAEA Abstracts No. : 48000829
Paper Submission No. : 23106

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Measurements of the branching fractions , and

Measurements of the branching fractions ${cal B}(B^{-} to bar{Lambda}_{c}^{-} Xi_{c}^{'0})$ , ${cal B}(B^{-} to bar{Lambda}_{c}^{-} Xi_{c}(2645)^{0})$ and ${cal B}(B^{-} to bar{Lambda}_{c}^{-} Xi_{c}(2790)^{0})$