Charged- and neutral-current production ofΔ(1236)

- 02 Charm Production in Charged Current Interactions and Charm & Beauty Production in Neutral Current Interactions

The charm and beauty production cross sections in ep neutral current processes and the charm production cross section in ep charged current processes at high Q are measured at HERA. Their determination relies on an inclusive method, where secondary decay vertices are explicitly reconstructed using the H1 vertex detector. The charm and beauty cross sections in neutral current interactions are me...

Charged and Neutral Current Couplings of Quarks

2 Neutral and Charged Current Dis at Large Q

Data from the HERA collider experiments, H1 and ZEUS, have been fundamental to the rapid recent development of our understanding of the partonic composition of the proton and of QCD. This report focuses on inclusive measurements of neutral and charged current cross sections at HERA, using the full available data taken to date. The present precision on the proton parton densities and the further...

Leptoproduction of heavy quarks. I. General formalism and kinematics of charged current and neutral current production processes.

Existing calculations of heavy quark production in charged-current and neutral current lepton-hadron scattering are formulated differently because of the artificial distinction of “light” and “heavy” quarks made in the traditional approach. A proper QCD formalism valid for a wide kinematic range from near threshold to energies much higher then the quark mass should treat these processes in a un...

Polarization Correlations in Pair Production from Charged and Neutral Strings

Polarization correlations of ee pair productions from charged and neutral Nambu strings are investigated, via photon and graviton emissions, respectively and explicit expressions for their corresponding probabilities are derived and found to be speed dependent. The strings are taken to be circularly oscillating closed strings, as perhaps the simplest solution of the Nambu action. In the extreme...