@article{10902/1849,
year = {2011},
month = {4},
url = {http://hdl.handle.net/10902/1849},
abstract = {We reconstruct the rare decays B+→K+μ+μ-, B0→K*(892)0μ+μ-, and Bs0→ϕ(1020)μ+μ- in a data sample corresponding to 4.4  fb-1 collected in pp̅ collisions at √s=1.96  TeV by the CDF II detector at the Tevatron Collider. Using 121±16 B+→K+μ+μ- and 101±12 B0→K*0μ+μ- decays we report the branching ratios. In addition, we report the differential branching ratio and the muon forward-backward asymmetry in the B+ and B0 decay modes, and the K*0 longitudinal polarization fraction in the B0 decay mode with respect to the squared dimuon mass. These are consistent with the predictions, and most recent determinations from other experiments and of comparable accuracy. We also report the first observation of the Bs0→ϕμ+μ- decay and measure its branching ratio BR(Bs0→ϕμ+μ-)=[1.44±0.33±0.46]×10-6 using 27±6 signal events. This is currently the most rare Bs0 decay observed.},
organization = {We thank the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported by the U. S. Department of Energy and
National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China;
the Swiss National Science Foundation; the A.P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the World Class University Program, the National Research Foundation of Korea; the Science and Technology Facilities Council and the Royal Society, UK; the Institut National de Physique Nucleaire et Physique des Particules/CNRS; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; and the Academy of Finland.},
publisher = {American Physical Society},
publisher = {Physical Review Letters, 2011, 106(16), 161801},
title = {Measurement of the forward-backward asymmetry in the B→K(*)μ+μ- decay and first observation of the Bs0→ϕμ+μ- decay},
author = {Aaltonen, Timo Antero and Álvarez González, Bárbara and Casal Laraña, Bruno and Cuevas Maestro, Francisco Javier and Gómez Gramuglio, Gervasio and Palencia Cortezón, José Enrique and Rodrigo Anoro, Teresa and Ruiz Jimeno, Alberto and Scodellaro, Luca and Vila Álvarez, Iván  and Vilar Cortabitarte, Rocío},
}