Search for B{sup +}{yields}{tau}{sup +}{nu} decays with hadronic B tags
- Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
- Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
- Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
- University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
- Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
We present a search for the decay B{sup +}{yields}{tau}{sup +}{nu} using 383x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the BABAR detector at the SLAC PEP-II B Factory. We select a sample of events with one completely reconstructed tag B in a hadronic decay mode (B{sup -}{yields}D{sup (*)0}X{sup -}), and examine the rest of the event to search for a B{sup +}{yields}{tau}{sup +}{nu} decay. We identify the {tau} lepton in the following modes: {tau}{sup +}{yields}e{sup +}{nu}{nu}, {tau}{sup +}{yields}{mu}{sup +}{nu}{nu}, {tau}{sup +}{yields}{pi}{sup +}{nu}, and {tau}{sup +}{yields}{pi}{sup +}{pi}{sup 0}{nu}. We find a 2.2{sigma} excess in data and measure a branching fraction of B(B{sup +}{yields}{tau}{sup +}{nu})=(1.8{sub -0.8}{sup +0.9}(stat.){+-}0.4(bkg. syst.){+-}0.2(other syst.))x10{sup -4}. We calculate the product of the B meson decay constant f{sub B} and |V{sub ub}| to be f{sub B}{center_dot}|V{sub ub}|=(10.1{sub -2.5}{sup +2.3}(stat.){sub -1.5}{sup +1.2}(syst.))x10{sup -4} GeV.
- OSTI ID:
- 21035668
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 1; Other Information: DOI: 10.1103/PhysRevD.77.011107; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). BABAR Collaboration; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
The Search for B+ to Tau+ Nu(Tau) at BaBar
A Search for B+ to tau+ nu