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http://hdl.handle.net/2445/131642
Title: | Measurement of the branching fraction and ¯¯¯Λ polarization in B0→¯¯¯Λpπ− |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 19-Jun-2009 |
Publisher: | American Physical Society |
Abstract: | We present a measurement of the B 0 → ¯¯¯ Λ p π − branching fraction performed using the BABAR detector at the PEP-II asymmetric e + e − collider. Based on a sample of 467 × 10 6 B ¯¯¯ B pairs we measure B ( B 0 → ¯¯¯ Λ p π − ) = [ 3.07 ± 0.31 ( stat ) ± 0.23 ( syst ) ] × 10 − 6 . The measured differential spectrum as a function of the dibaryon invariant mass m ( ¯¯¯ Λ p ) shows a near-threshold enhancement similar to that observed in other baryonic B decays. We study the ¯¯¯ Λ polarization as a function of ¯¯¯ Λ energy in the B 0 rest frame ( E ∗ ¯¯¯ Λ ) and compare it with theoretical expectations of fully longitudinally right-polarized ¯¯¯ Λ at large E ∗ ¯¯¯ Λ . |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.79.112009 |
It is part of: | Physical Review D, 2009, vol. 79, num. 11, p. 112009 |
URI: | http://hdl.handle.net/2445/131642 |
Related resource: | https://doi.org/10.1103/PhysRevD.79.112009 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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