Measurement of the Branching Fraction and Lambda-bar Polarization in B0 -> Lambda-par P Pi-.
Author | : |
Publisher | : |
Total Pages | : 12 |
Release | : 2009 |
ISBN-10 | : OCLC:1061396693 |
ISBN-13 | : |
Rating | : 4/5 (93 Downloads) |
Download or read book Measurement of the Branching Fraction and Lambda-bar Polarization in B0 -> Lambda-par P Pi-. written by and published by . This book was released on 2009 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the B° → {bar ?}p?− branching fraction performed using the BABAR detector at the PEP-II asymmetric e+e− collider. Based on a sample of 467 x 106 B{bar B} pairs we measure ?(B° → {bar ?}p?−) [3.07 ± 0.31(stat.) ± 0.23(syst.)] x 10−6. The measured differential spectrum as a function of the dibaryon invariant mass m({bar ?}p) shows a near-threshold enhancement similar to that observed in other baryonic B decays. We study the {bar ?} polarization as a function of {bar ?} energy in the B° rest frame (E*{sub {bar ?}}) and compare it with theoretical expectations of fully longitudinally right-polarized {bar ?} at large E*{sub {bar ?}}.