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 Korean Science and Engineering Foundation and the Korean Research Foundation; 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.

We report results from a search for the lepton flavor violating decays B-s(0) -> e(+)mu(-) and B-0 -> e(+)mu(-), and the flavor-changing neutral-current decays B-s(0) -> e(+)e(-) and B-0 -> e(+)e(-). The analysis uses data corresponding to 2 fb(-1) of integrated luminosity of p (p) over bar collisions at root s = 1.96 TeV collected with the upgraded Collider Detector (CDF II) at the Fermilab Tevatron. The observed number of B-0 and B-s(0) candidates is consistent with background expectations. The resulting Bayesian upper limits on the branching ratios at 90% credibility level are B(B-s(0) -> e(+)mu(-) ) e(+)mu(-)) e(+)e(-) ) e(+)e(-)) e(+)mu(-)), the following lower bounds on the Pati-Salam leptoquark masses are also derived: M-LQ(B-s(0) -> e(+)mu(-)) > 47.8 TeV/c(2), and M-LQ(B-0 -> e(+)mu(-)) > 59.3 TeV/c(2), at 90% credibility level.

Peer reviewed