Search for exclusive b→u semileptonic decays of B mesons

Authors

A. Bean, University of California, Santa Barbara
J. Gronberg, University of California, Santa Barbara
R. Kutschke, University of California, Santa Barbara
S. Menary, University of California, Santa Barbara
R. J. Morrison, University of California, Santa Barbara
H. N. Nelson, University of California, Santa Barbara
J. D. Richman, University of California, Santa Barbara
H. Tajima, University of California, Santa Barbara
D. Schmidt, University of California, Santa Barbara
D. Sperka, University of California, Santa Barbara
M. S. Witherell, University of California, Santa Barbara
M. Procario, University of California, Santa Barbara
S. Yang, University of California, Santa Barbara
R. Ballest, University of California, Santa Barbara
M. Daoudi, University of California, Santa Barbara
W. T. Ford, University of California, Santa Barbara
D. R. Johnson, University of California, Santa Barbara
K. Lingel, University of California, Santa Barbara
M. Lohner, University of California, Santa Barbara
P. Rankin, University of California, Santa Barbara
J. G. Smith, University of California, Santa Barbara
J. P. Alexander, University of California, Santa Barbara
C. Bebek, University of California, Santa Barbara
K. Berkelman, University of California, Santa Barbara
D. Besson, University of California, Santa Barbara
T. E. Browder, University of California, Santa Barbara
D. G. Cassel, University of California, Santa Barbara
H. A. Cho, University of California, Santa Barbara
D. M. Coffman, University of California, Santa Barbara
P. S. Drell, University of California, Santa Barbara
R. Ehrlich, University of California, Santa Barbara

Document Type

Article

Publication Date

1-1-1993

Abstract

Using a sample of 935 000 BB̄ pairs collected with the CLEO-II detector at the Cornell Electron Storage Ring, we have obtained upper limits on the branching ratios for the b→ul-ν̄ processes B-→ωl- ν̄, B-→ρ0l-ν̄, and B̄0→ρ+l-ν̄. The combined result using the relationships among the widths for these three modes is B(B-→ρ0l-ν̄)<(1.6-2.7)×10-4 at 90% C.L., where the range of values is due to model dependence of the detection efficiencies. These measurements yield the limits Vub/Vcb<0.08-0.13. © 1993 The American Physical Society.

Recommended Citation

Bean, A.; Gronberg, J.; Kutschke, R.; Menary, S.; Morrison, R. J.; Nelson, H. N.; Richman, J. D.; Tajima, H.; Schmidt, D.; Sperka, D.; Witherell, M. S.; Procario, M.; Yang, S.; Ballest, R.; Daoudi, M.; Ford, W. T.; Johnson, D. R.; Lingel, K.; Lohner, M.; Rankin, P.; Smith, J. G.; Alexander, J. P.; Bebek, C.; Berkelman, K.; Besson, D.; Browder, T. E.; Cassel, D. G.; Cho, H. A.; Coffman, D. M.; Drell, P. S.; and Ehrlich, R., "Search for exclusive b→u semileptonic decays of B mesons" (1993). Physics Faculty Publications. 51.
https://digitalcommons.bowdoin.edu/physics-faculty-publications/51