TY  - JOUR
AU  - CDF Collaboration (Aaltonen, T. et al
AU  - Cabrera, S.
PY  - 2011
DA  - 2011//
TI  - Observation of the Baryonic Flavor-Changing Neutral Current Decay Lambda(0)(b) -> Lambda mu(+)mu(-)
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 201802
EP  - 8pp
VL  - 107
IS  - 20
PB  - Amer Physical Soc
AB  - We report the first observation of the baryonic flavor-changing neutral current decay Lambda(0)(b) -> Lambda mu(+)mu(-) with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses a p (p) over bar collisions data sample corresponding to 6.8 fb(-1) at root s = 1.96 TeV collected by the CDF II detector at the Tevatron collider. The total and differential branching ratios for Lambda(0)(b) -> Lambda mu(+)mu(-) are measured. We find B(Lambda(0)(b) -> Lambda mu(+)mu(-)) = [1.73 +/- 0.42(stat) +/- (syst)] x 10(-6). We also report the first measurement of the differential branching ratio of B(s)(0) -> phi mu(+)mu(-), using 49 signal events. In addition, we report branching ratios for B(+) -> K(+)mu(+)mu(-), B(0) -> K(0)mu(+)mu(-), and B -> K*(892)mu(+)mu(-) decays.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1107.3753
UR  - https://doi.org/10.1103/PhysRevLett.107.201802
DO  - 10.1103/PhysRevLett.107.201802
LA  - English
N1  - WOS:000297130800003
ID  - CDFCollaborationAaltonen+Cabrera2011
ER  -