[Triumf-seminars] TRIUMF Seminar today at 14:00

[postmaster at admin.triumf.ca]

Date/Time: Wed 2008-10-29 at 14:00

Location:  Auditorium          

Speaker:   Doron Gazit (INT, University of Washington, Seattle)

Title:     Electro-weak reactions on light nuclei: from QCD to astrophysics

Abstract: Recent theoretical developments, in low energy description of the strong interaction and in few-body methods, enable a description of light nuclei, essentially without free parameters, from their nucleonic degrees of freedom. This opens a ray of oppurtunities, ranging from QCD to astrophysics. In astrophysics, I will present ab-initio calculations of neutrino inelastic scattering on the trinuclei and 4He, which are unavailable experimentally. These can affect the explosion mechanism of core-collapse supernova, and determine the amount of 7Li produced in this scenario. In nuclear physics, describing triton beta-decay using chiral perturbation theory gives us an objective look at short range correlations in the nucleus, and the elusive three nucleon forces. The same process in 6He helps us assess fundamental problems, such as the g_A -> problem. Finally, I will discuss the process of muon capture on 3He, where precision experimental data and theoretical evaluation combine together to grant a deep look into the weak structure of the nucleon, giving the strongest bounds on the induced pseudoscalar form factor, and on the conservation of vector current (CVC) hypothesis.





______________________________

Subscription information available at http://admin.triumf.ca/netdata/seminars/list