Please use this identifier to cite or link to this item: 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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