Speaker
Arafat Gabareen Mokhtar
(SLAC / Stanford University)
Description
* A study of radiative Upsilon(2S) and Upsilon(3S) transitions using converted photons
We present a study of the radiative transitions from decays of the Upsilon(2S) and Upsilon(3S) resonances using photons that have converted into an e+e- pair. This study uses data collected with the BABAR detector operating at the SLAC PEP-II B-factory on the Upsilon(2S) and Upsilon(3S) resonances.
* Search for f_J(2220) Production in Radiative J/psi Decays
We present a search for f_J(2220) production in radiative J/psi -> gamma f_J(2220) decays using 460 fb-1 of data collected with the BaBar detector at the PEP-II storage rings. The f_J(2220) is reconstructed in the decays f_J(2220) -> K+K- and f_J(2220) -> K0_S K0_S$. No evidence of this resonance is observed and 90% confidence level upper limits on the J/psi -> gamma f_J(2220), f_J(2220) -> K+ K- and J/psi -> gamma f_J(2220), f_J(2220) -> K0_S K0_S branching fractions are set at the level of 10^-5.
* The search for new X(3872) decay modes and for the Z1 and Z2 states in chi_c1 pi
We present a search for the X(3872) produced in B-->psi pi+pi- K and B-->psi pi+pi-pi0 K (psi=J/psi or psi(2S)) using 427 fb-1 of BaBar data. We also report on a search for the Z1 and Z2 states in the chi_c1 pi invariant-mass distribution at BaBar. We perform a study of charged and neutral B decays to chi_c1 K pi. The aim is to search for the two resonance-like structures, the Z1 and Z2, first observed by the Belle experiment in the chi_c1 pi+ invariant-mass distribution near 4.1 GeV in exclusive B0->chi_c1 K-pi+.
