A Search for B+ --> tau + nu tau Recoiling Against B- --> D0 l- nu-bar l X
- SLAC
We present a search for the decay B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} in 88.9 x 10{sup 6} {Upsilon}(4S) decays recorded with the BABAR detector at the SLAC B-Factory. A sample of semi-exclusive, semi-leptonic B decays (B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}{sub {ell}}X), where X is either a photon, {pi}{sup 0}, or nothing, is used to identify the daughter particles that are associated with the other B meson in each event. These particles are searched for evidence of a one-prong leptonic B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} decay. For this data sample we set a preliminary upper limit on the branching fraction of {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) < 4.9 x 10{sup -4} at the 90% confidence level. This result is then combined with a statistically independent BABAR search for B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} to give a combined preliminary limit of {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) < 4.1 x 10{sup -4}.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (US)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 812972
- Report Number(s):
- SLAC-PUB-9688
- Country of Publication:
- United States
- Language:
- English
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