Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/131670
Title: | Angular distributions in the decay B→K∗l+l− |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 26-Feb-2009 |
Publisher: | American Physical Society |
Abstract: | We use a sample of 384 × 10 6 B ¯¯¯ B events collected with the BABAR detector at the PEP-II e + e − collider to study angular distributions in the rare decays B → K ∗ ℓ + ℓ − , where ℓ + ℓ − is either e + e − or μ + μ − . For low dilepton invariant masses, m ℓ ℓ < 2.5 GeV / c 2 , we measure a lepton forward-backward asymmetry A FB = 0.24 + 0.18 − 0.23 ± 0.05 and K ∗ longitudinal polarization F L = 0.35 ± 0.16 ± 0.04 . For m ℓ ℓ > 3.2 GeV / c 2 , we measure A FB = 0.76 + 0.52 − 0.32 ± 0.07 and F L = 0.71 + 0.20 − 0.22 ± 0.04 . |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.79.031102 |
It is part of: | Physical Review D, 2009, vol. 79, num. 3, p. 031102 |
URI: | http://hdl.handle.net/2445/131670 |
Related resource: | https://doi.org/10.1103/PhysRevD.79.031102 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
577767.pdf | 265.69 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.