DSpace

Digital.CSIC > Ciencia y Tecnologías Físicas > Instituto de Física de Cantabria (IFCA) > (IFCA) Artículos >

Share

EndNote

Impact

Open Access item Observation of the Baryonic Flavor-Changing Neutral Current Decay Λb0→Λμ+μ-

Authors:Aaltonen, T.
Álvarez González, B.
Casal, Bruno
Cuevas, Javier
Gómez, G.
Palencia, Enrique
Rodrigo, Teresa
Ruiz Jimeno, Alberto
Scodellaro, Luca
Vila, Iván
Vilar, Rocío
Cabrera, Susana
Cuenca Almenar, Cristóbal
Issue Date:Nov-2011
Publisher:American Physical Society
Citation:Physical Review Letters 107(20): 201802 (2011)
Abstract:We report the first observation of the baryonic flavor-changing neutral current decay Λb0→Λμ+μ- with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses a pp̅ collisions data sample corresponding to 6.8  fb-1 at √s=1.96  TeV collected by the CDF II detector at the Tevatron collider. The total and differential branching ratios for Λb0→Λμ+μ- are measured. We find B(Λb0→Λμ+μ-)=[1.73±0.42(stat)±(syst)]×10-6. We also report the first measurement of the differential branching ratio of Bs0→ϕμ+μ-, using 49 signal events. In addition, we report branching ratios for B+→K+μ+μ-, B0→K0μ+μ-, and B→K*(892)μ+μ- decays.
Description:8 páginas, 2 figuras, 4 tablas.-- PACS numbers: 13.30.Ce, 12.15.Mm, 14.20.Mr.-- CDF Collaboration: et al.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevLett.107.201802
URI:http://hdl.handle.net/10261/46368
ISSN:0031-9007
E-ISSNmetadata.dc.identifier.doi = DOI:1079-7114
???metadata.dc.identifier.doi???:10.1103/PhysRevLett.107.201802
Appears in Collections:(IFCA) Artículos
(IFIC) Artículos

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.