Aaltonen, T;
Gonzalez, BA;
Amerio, S;
Amidei, D;
Anastassov, A;
Annovi, A;
Antos, J;
... CDF Collaboration; + view all
(2011)
Observation of the Baryonic Flavor-Changing Neutral Current Decay Lambda(0)(b) -> Lambda mu(+)mu(-).
PHYS REV LETT
, 107
(20)
, Article 201802. 10.1103/PhysRevLett.107.201802.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | Observation of the Baryonic Flavor-Changing Neutral Current Decay Lambda(0)(b) -> Lambda mu(+)mu(-) |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.107.201802 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.107.201802 |
| Language: | English |
| Additional information: | © 2011 American Physical Society |
| Keywords: | UPGRADE |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1334442 |
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