158 articles – 1995 references  [version française]
 HAL: in2p3-00618358, version 1
 arXiv: 1107.3753
 ADS Bibliographic id: 2011PhRvL.107t1802A
 Physical Review Letters 107 (2011) 201802
 Observation of the Baryonic Flavor-Changing Neutral Current Decay Λb0→Λμ+μ-
 For the CDF collaboration(s)
 (2011-11)
 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 pp¯ collisions data sample corresponding to 6.8fb-1 at s=1.96TeV 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.
 Research team: APC - AHE
 Subject(s) : Physics/High Energy Physics - ExperimentSciences of the Universe/Astrophysics/High Energy Astrophysical PhenomenaPhysics/Astrophysics/High Energy Astrophysical Phenomena
 Keyword(s) : Leptonic – semileptonic – and radiative decays – Neutral currents – Bottom baryons
 Fulltext link: http://fr.arXiv.org/abs/1107.3753
 in2p3-00618358, version 1 http://hal.in2p3.fr/in2p3-00618358 oai:hal.in2p3.fr:in2p3-00618358 From: Swarna Bassava <> Submitted on: Thursday, 1 September 2011 15:04:15 Updated on: Tuesday, 9 October 2012 16:46:48