Searching for a light Higgs-like boson in Upsilon leptonic decays

por Miguel Angel Sanchis Lozano (IFIC and Departamento de Fisica Teorica UV)

viernes 31 oct. 2003 12:00 → 13:00 Europe/Madrid

Sala Seminarios (Dpto. de Física Teórica (UVEG))

We examine the posssible existence of new physics which could modify the branching fractions of the leptonic decays of Upsilon resonances. In particular, the existence of a light non-standard CP-odd Higgs mediating the decay could lead to an experimental observation of lepton universality breakdown,compatible with current data. A possible mixing between the pseudoscalar Higgs and eta_b resonances can have observable consequences on the bottomonium spectroscopy. Other possible scenarios are also considered.