The e+e− --> K+K− Cross Section at Center-of-Mass Energies 0.99 – 5.0 GeV Measured with Initial-State Radiation

Aula B-1 (Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati)

Aula B-1

Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati

Via Enrico Fermi 40 00044 Frascati

We study the process e+e− --> K+K− with a hard photon radiated from the initial state. About 76,000 fully reconstructed events have been selected from 232 fb−1 of BaBar data. The invariant mass of the hadronic final state defines the effective e+e− center-of-mass energy, so that these data can be compared with the corresponding direct e+e− measurements. From the K+K−-mass spectrum, the cross section for the process e+e− --> K+K− are measured for center-of-mass energies from 0.99 to 5.0 GeV. We observe the (1020), Y (2175) and J/ signals for the kaons pair final state and measure the corresponding branching fractions.

The agenda of this meeting is empty
Your browser is out of date!

Update your browser to view this website correctly. Update my browser now