Charged current weak electroproduction of theΔresonance

- th / 9 71 20 58 v 1 1 6 D ec 1 99 7 Charged current weak electroproduction of ∆ resonance

We study the weak production of ∆ (i.e. e − + p → ∆ 0 + ν e and e + + p → ∆ ++ + ¯ ν e) in the intermediate energy range corresponding to the Mainz and TJNAF electron accelerators. The differential cross sections σ(θ) are found to be of the order of 10 −39 cm 2 /sr, over a range of angles which increases with energy. The possibility of observing these reactions with the high luminosities availa...

Methods of Testing Lepton Universality using Charged Current Weak Interactions

Pion charge radius from charged pion electroproduction

We analyze a low-energy theorem of threshold pion electroproduction which allows one to determine the charge radius of the pion. We show that at the same order where the radius appears, pion loops induce a correction to the momentum dependence of the longitudinal dipole amplitude L01 (2) . This model-independent correction amounts to an increase of the pion charge radius squared from the electr...

Quantum Interference Effects in the Detection Probability of Charged Leptons Produced in Charged Current Weak Interactions

The phases of quantum interference effects in charged lepton production by neutrinos (neutrino oscillations) following pion decay at rest and in flight, muon decay and nuclear β−decay at rest as well as for ‘muon oscillations’ following pion decay at rest and in flight are calculated. The same phase is found for neutrino and muon oscillations following pion decay at rest. The results found disa...

Weak quasielastic electroproduction of hyperons with polarization observables

With the availability of high luminosity electron beam at the accelerators, there is now the possibility of studying weak quasielastic hyperon production off the proton i.e. ep → νeY (Y = Λ,Σ ), which will enable the determination of nucleon-hyperon vector and axial-vector transition form factors at high Q in the strangeness sector and provide test of the Cabibbo model, G-invariance, CVC, PCAC ...