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Title: Search for B + K + τ + τ - at the BaBar Experiment

Journal Article · · Physical Review Letters
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© 2017 American Physical Society. We search for the rare flavor-changing neutral current process B+→K+τ+τ- using data from the BABAR experiment. The data sample, collected at the center-of-mass energy of the (4S) resonance, corresponds to a total integrated luminosity of 424 fb-1 and to 471×106 BB pairs. We reconstruct one B meson, produced in the (4S)→B+B- decay, in one of many hadronic decay modes and search for activity compatible with a B+→K+τ+τ- decay in the rest of the event. Each τ lepton is required to decay leptonically into an electron or muon and neutrinos. Comparing the expected number of background events with the data sample after applying the selection criteria, we do not find evidence for a signal. The resulting upper limit, at the 90% confidence level, is B(B+→K+τ+τ-) < 2.25×10-3.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Contributing Organization:
BaBar Collaboration
Grant/Contract Number:
AC02-76SF00515; AC02-05CH11231
OSTI ID:
1361131
Alternate ID(s):
OSTI ID: 1341316; OSTI ID: 1393608
Report Number(s):
SLAC-PUB-16526; PRLTAO
Journal Information:
Physical Review Letters, Vol. 118, Issue 3; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

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Cited By (4)

Search for B Λ p ¯ ν ν ¯ with the BaBar experiment journal December 2019
Large h b s in generic two-Higgs-doublet models journal February 2018
Averages of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties as of summer 2016 journal December 2017
Lepton polarization asymmetries in rare semi-tauonic $$ b \rightarrow s $$ b → s exclusive decays at FCC-ee journal October 2017

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