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Observation of the decay B̅ 0→Λc+p̅ π0

Author(s)
Cowan, Ray Franklin; Dujmic, Denis; Fisher, Peter H.; Henderson, Shawn Wesley; Sciolla, Gabriella; Spitznagel, Michael; Yamamoto, Richard K.; Zhao, Min Liang; ... Show more Show less
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Alternative title
Observation of the decay B [beta superscript -0]→Λ [delta subscript c superscript +]p[superscript - pi 0]
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
In a sample of 467×106 BB̅ pairs collected with the BABAR detector at the PEP-II collider at SLAC we have observed the decay B̅ 0[beta superscript -0]→Λc+p̅ π0 [delta subscript c superscript +]p[superscript - pi 0] and measured the branching fraction to be (1.94±0.17±0.14±0.50)×10[superscript -4], where the uncertainties are statistical, systematic, and the uncertainty on the Λc+ [delta subscript c superscript +]→pK-π+ [p kappa superscript - pi +-π+ branching fraction, respectively. We determine an upper limit of 1.5×10[superscript -6] at 90% C.L. for the product branching fraction B(B̅ [superscript 0]→Σ [sigma subscript c superscript +](2455)p̅)×B(Λ [delta subscript c superscript +]→pK-π+ [p kappa superscript- pi +]). Furthermore, we observe an enhancement at the threshold of the invariant mass of the baryon-antibaryon pair.
Date issued
2010-08
URI
http://hdl.handle.net/1721.1/60887
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical review D
Publisher
American Physical Society
Citation
Aubert, B. et al. “Observation of the decay B[over ¯]^{0}→Λ_{c}^{+}p[over ¯]π^{0}.” Physical Review D 82.3 (2010): n. pag. © 2010 The American Physical Society
Version: Final published version
ISSN
1550-7998
1550-2368

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