Search for the B to K nu nu-bar Decay Using Semi-Leptonic Tags
Journal Article
·
· Submitted to Physical Review D
OSTI ID:981387
We present an update of the search for the flavor-changing neutral current B{sup +} {yields} K{sup +}{nu}{bar {nu}} decay using 351 X 10{sup 6} B{bar B} pairs collected at the {Upsilon}(4S) resonance with the BABAR detector at the SLAC PEP-II B factory. Due to the presence of two neutrinos in the final state, we require the reconstruction of the companion B in the event through the decay channel B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}X. We find 38 candidates in the data with an expected background of 31{-+} 12. This allows us to set an upper limit on the branching fraction for B{sup +} {yields} K{sup +}{nu}{bar {nu}} of 4.5 X 10{sup -5} at 90% confidence level.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 981387
- Report Number(s):
- SLAC-PUB-13713; arXiv:0911.1988; TRN: US1003921
- Journal Information:
- Submitted to Physical Review D, Journal Name: Submitted to Physical Review D
- Country of Publication:
- United States
- Language:
- English
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