Oak Ridge National Laboratory

Physics Division

Physics Division Seminars

Physics Division Seminars bring us speakers on a variety of physics related subjects. Usually these are held in the Building 6008 large Conference Room, at 3:00 pm on the chosen day, but times and locations may vary. For more information, contact our seminar chairman,

Alfredo Galindo-Uribarri
Tel (Office): (865) 574-6124  (FAX): (865) 574-1268

Tue., November 09, 2010, at 3:00 p.m. (refreshments at 2:40 p.m.)

Theoretical study of the parity-violating asymmetry in the 3He(n,p)3H reaction

Michele Viviani, Istituto Nazionale di Fisica Nucleare - Sezione di Pisa, Italy
Building 6008 Conference Room

The study of parity violation (PV) in low-energy processes involving few nucleon systems is an active area of research. The primary objective of this program is to have a better understanding of the weak interaction between hadrons, in particular its interplay with the strong interaction.

In this talk, we report on a theoretical study of the longitudinal asymmetry induced by PV nucleon-nucleon potential in the charge-exchange reaction 3He(n,p)3H. The four-nucleon wave functions are accurately derived from solutions of the strong-interaction Hamiltonian with the hyperspherical-harmonics method, fully accounting for the coupled-channel nature of the scattering problem. The longitudinal asymmetry is calculated for vanishing neutron incident energies, in correspondence of the DDH model of PV nucleon-nucleon interaction. The properties and features of the PV potential, as derived from an effective field theory based on the chiral symmetry, will also be discussed.