122452337
THE PLUNGING MAGNET SYSTEM FOR THE NIMROD EXTRACTED PROTON BEAM
117183644
FEASIBILITY STUDY OF A 15- TO 70-Mev SEPARATED-ORBIT CYCLOTRON AS A BOOSTER INJECTOR
119484740
First determination of the quark mixing matrix element $V_{tb}$ independent of assumptions of unitarity
We present a new method for the determination of the Cabibbo-Kobayashi-Maskawa quark mixing matrix element $|V_{tb}|$ from electroweak loop corrections, in particular those affecting the process $Z\to b\bar{b}$. From a combined analysis of results from the LEP, SLC, Tevatron, and neutrino scattering experiments we determine $|V_{tb}| = 0.77^{+0.18}_{-0.24}$. This is the first determination of $|V_{tb}|$ which is independent of unitarity assumptions.
17878414
Radiative tau lepton pair production as a probe of anomalous electromagnetic couplings of the tau
Abstract We calculate the squared matrix element for the process e + e − → τ + τ − γ allowing for anomalous magnetic and electric dipole moments at the ττγ vertex. No interferences are neglected and no approximations of light fermion masses are made. We show that anomalous moments affect not only the cross section, but also the shape of the photon energy and angular distributions. We also demonstrate that in the case of the anomalous magnetic dipole moment, the contribution from interference involving Standard Model and anomalous amplitudes is significant compared to the contribution from anomalous amplitudes alone. A program to perform the calculation is available and it may be employed as a Monte Carlo generator.