Published February 26, 2009 | Version Published
Journal Article Open

Angular distributions in the decay B → K^*l^+l^-

Creators

Abstract

We use a sample of 384×106 B[overline B] events collected with the BABAR detector at the PEP-II e+e- collider to study angular distributions in the rare decays B-->K*[script-l]+[script-l]-, where [script-l]+[script-l]- is either e+e- or µ+µ-. For low dilepton invariant masses, m[script-l][script-l]<2.5 GeV/c2, we measure a lepton forward-backward asymmetry [script A]FB=0.24-0.23+0.18±0.05 and K* longitudinal polarization FL=0.35±0.16±0.04. For m[script-l][script-l]>3.2 GeV/c2, we measure [script A]FB=0.76-0.32+0.52±0.07 and FL=0.71-0.22+0.20±0.04.

Additional Information

© 2009 The American Physical Society. Received 28 April 2008; published 26 February 2009. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain), and STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union) and the A. P. Sloan Foundation.

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Additional details

Additional titles

Alternative title
Angular Distributions in the Decays B ---> K* l+ l-

Identifiers

Eprint ID
16328
Resolver ID
CaltechAUTHORS:20091013-134513643

Funding

Department of Energy (DOE)
NSF
Natural Sciences and Engineering Research Council of Canada (NSERC)
Commissariat à l'Energie Atomique (CEA)
Centre National de la Recherche Scientifique (CNRS)
Bundesministerium für Bildung und Forschung (BMBF)
Deutsche Forschungsgemeinschaft (DFG)
Istituto Nazionale di Fisica Nucleare (INFN)
Stichting voor Fundamenteel Onderzoek der Materie (FOM)
Norwegian Research Council
Ministry of Education and Science of the Russian Federation
Ministerio de Educación y Ciencia (MEC)
Science and Technology Facilities Council (STFC)
Marie Curie Fellowship
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
Alfred P. Sloan Foundation

Dates

Created
2009-10-15
Created from EPrint's datestamp field
Updated
2023-03-16
Created from EPrint's last_modified field