Search for the Decays B(s)-->e+mu- and B(s)-->e+e- in CDF Run II
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Aaltonen-2009-Search for the Decay.pdf
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Author(s)
Xie, Si
Knuteson, Bruce O.
Henderson, C.
Hahn, Kristian Allan
Gomez-Ceballos, Guillelmo
Choudalakis, Georgios
Paus, Christoph M. E.
Makhoul, Khaldoun
Goncharov, Maxim
Bauer, Gerry P
Date Issued
May 2009
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Search for the Decays B(s)-->e+mu- and B(s)-->e+e- in CDF Run II.” Physical Review Letters 102.20 (2009): 201801. © 2009 The American Physical Society.
Version
Final published version
Abstract
We report results from a search for the lepton flavor violating decays B[subscript s][superscript 0]→e[superscript +]μ[superscript -] and B[superscript 0]→e[superscript +]μ[superscript -], and the flavor-changing neutral-current decays B[subscript s][superscript 0]→e[superscript +]e[superscript -] and B[superscript 0]→e[superscript +]e[superscript -]. The analysis uses data corresponding to 2 fb[superscript -1] of integrated luminosity of pp̅ collisions at √s=1.96 TeV collected with the upgraded Collider Detector (CDF II) at the Fermilab Tevatron. The observed number of B[superscript 0] and B[subscript s][superscript 0] candidates is consistent with background expectations. The resulting Bayesian upper limits on the branching ratios at 90% credibility level are B(B[subscript s][superscript 0]→e[superscript +]μ[superscript -])<2.0×10[superscript -7], B(B[superscript 0]→e[superscript +]μ[superscript -])<6.4×10[superscript -8], B(B[subscript s][superscript 0]→e[superscript +]e[superscript -])<2.8×10[superscript -7], and B(B[superscript 0]→e[superscript +]e[superscript -])<8.3×10[superscript -8]. From the limits on B(B([subscript s])[superscript 0]→e[superscript +]μ[superscript -]), the following lower bounds on the Pati-Salam leptoquark masses are also derived: MLQ(B[subscript s][superscript 0]→e[superscript +]μ[superscript -])>47.8 TeV/c[superscript 2], and MLQ(B[superscript 0]→e[superscript +]μ[superscript -])>59.3 TeV/c[superscript 2], at 90% credibility level.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.102.201801
