Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/140219
Search for the Decay B+→K+τ∓μ±
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
We present a search for the lepton flavor violating decay B + → K + τ ∓ μ ± using 383 × 10 6 B ¯¯¯ B events collected by the BABAR experiment. The branching fraction for this decay can be substantially enhanced in new physics models. The kinematics of the tau from the signal B decay are inferred from the K + , μ , and other B in the event, which is fully reconstructed in one of a variety of hadronic decay modes, allowing the signal B candidate to be fully reconstructed. We observe no excess of events over the expected background and set a limit of B ( B + → K + τ μ ) < 7.7 × 10 − 5 at 90% confidence level, where the branching fraction is for the sum of the K + τ − μ + and K + τ + μ − final states. We use this result to improve a model-independent bound on the energy scale of flavor-changing new physics.
Matèries
Matèries (anglès)
Citació
Citació
GARRA TICÓ, Jordi, GRAUGÉS POUS, Eugeni and BABAR Collaboration. Search for the Decay B+→K+τ∓μ±. Physical Review Letters. 2007. Vol. 99, num. 20, pags. 201801. ISSN 0031-9007. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/140219