RT Journal Article
T1 Fast CP violation
A1 Grossman, Y
A1 Peláez Sagredo, José Ramón
A1 Worah, M. P.
AB B flavor tagging will be extensively studied at the asymmetric B factories due to its importance in CP asymmetry measurements. The primary tagging modes are the semileptonic decays of the b (lepton tag), or the hadronic b → c(→ s) decays (kaon tag). We suggest that looking for time dependent CP asymmetries in events where one B is tagged leptonically and the other one is tagged with a kaon could result in an early detection of CP violation. Although in the standard model these asymmetries are expected to be small,  1%, they could be measured with about the same amount of data as in the "gold-plated" decay B_d→ψ K_s. In the presence of physics beyond the standard model, these asymmetries could be as large as  5%, and the first CP violation signal in the B system may show up in these events. We give explicit examples of new physics scenarios where this occurs. [S0556-2821(98)09321-7]
PB American Physical Society
SN 0556-2821
YR 1998
FD 1998-11-01
LK https://hdl.handle.net/20.500.14352/60095
UL https://hdl.handle.net/20.500.14352/60095
LA eng
NO ©1998 The American Physical Society.The authors thank Y. Nir, S. Plaszczynski, H. Quinn, T. Rizzo, J. Rosner, M-H. Schune, A. Snyder and A. Soffer for useful conversations. J.R.P. has been partially supported by the Spanish CICYT under contract AEN93-0776, and thanks the SLAC Theory Group for their kind hospitality as well as the Spanish Ministerio de Educación y Cultura for financial support. This research was supported by the Department of Energy under contract DE-AC03-76SF00515.
NO Spanish CICYT
NO Ministerio de Educación y Cultura
NO Department of Energy
DS Docta Complutense
RD 6 abr 2025