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Measurement of the branching fraction and Λ̄ polarization in B0→Λ̄pπ-

Abstract:

We present a measurement of the B0→Λ̄pπ- branching fraction performed using the BABAR detector at the PEP-II asymmetric e+e- collider. Based on a sample of 467×106 BB̄ pairs we measure B(B0→Λ̄pπ-)=[3.07±0.31(stat)±0.23(syst)] ×10-6. The measured differential spectrum as a function of the dibaryon invariant mass m(Λ̄p) shows a near-threshold enhancement similar to that observed in other baryonic B decays. We study the Λ̄ polarization as a function of Λ̄ energy in the B0 rest frame (EΛ̄*) and c...

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Publisher copy:
10.1103/PhysRevD.79.112009

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Journal:
Physical Review D More from this journal
Volume:
79
Issue:
11
Publication date:
2009-06-19
DOI:
EISSN:
1550-2368
ISSN:
1550-7998
Language:
English
Pubs id:
pubs:211402
UUID:
uuid:063445e3-d47c-429d-9e50-082a4f7e2fa1
Local pid:
pubs:211402
Source identifiers:
211402
Deposit date:
2012-12-19

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