English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/22026
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Direct CP, Lepton Flavor, and Isospin Asymmetries in the Decays B -> K((*))l(+)l(-)

AuthorsBabar Collaboration; Azzolini, Virginia; López-March, Neus ; Martínez-Vidal, Fernando ; Milanés, Diego A. ; Oyanguren, Arantza ; Aubert, B.
Issue Date6-Mar-2009
PublisherAmerican Physical Society
CitationPhysical Review Letters 102 (9): 091803 (2009)
AbstractWe measure branching fractions and integrated rate asymmetries for the rare decays B -> K((*))l(+)l(-), where l(+)l(-) is either e(+)e(-) or mu(+)mu(-), using a sample of 384x10(6) BB events collected with the BABAR detector at the PEP-II e(+)e(-) collider. We find no evidence for direct CP or lepton-flavor asymmetries. However, for dilepton masses below the J/psi resonance, we find evidence for unexpectedly large isospin asymmetries in both B -> Kl(+)l(-) and B -> K(*)l(+)l(-) which differ, respectively, by 3.2 sigma and 2.7 sigma, including systematic uncertainties, from the standard model expectations.
Publisher version (URL)http://dx.doi.org/ 10.1103/PhysRevLett.102.091803
Appears in Collections:(IFIC) Artículos
Files in This Item:
File Description SizeFormat 
direct cp.pdf229,74 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.