Search for the Decays B_s⁰,B_d⁰ → e^±μ^± and Pati-Salam Leptoquarks

Authors

F. Abe, National Laboratory for High Energy Physics (KEK), Tsukuba, Ibaraki 305, Japan
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Collider Detector at Fermilab Collaboration

Document Type

Article

Date of this Version

12-28-1998

Comments

Published by American Physical Society. Phys. Rev. Lett. 81, 5742 (1998). http://prl.aps.org. Copyright © 1998 American Physical Society. Permission to use.

Abstract

We have searched for the decays B_s⁰→ e^±μ^± and B_d⁰ → e^±μ^± using a 102 pb^-1 data sample of pp̅ collisions at √s =1.8 TeV collected with the Collider Detector at Fermilab. We set upper limits on the branching fractions of Ɓ(B_s⁰ → e^±μ^±) < 6.1(8.2) X 10^-6 and Ɓ(B_d⁰ → e^±μ^±) < 3.5(4.5) X 10^-6 at 90(95)% confidence level. Using these limits, we set lower bounds on the corresponding Pati-Salam leptoquark masses and find that M_LQ(B_s⁰) > 20.7(19.3) TeV/c² and M_LQ(B_d⁰ > 21.7(20.4) TeV/c² at 90(95)% confidence level.