June 29, 2015 to July 3, 2015
Pisa
Europe/Rome timezone

Nuclear axial current in chiral effective field theory

Jun 29, 2015, 5:00 PM
15m
Room PS1 (Building E, Polo Fibonacci, Pisa)

Room PS1

Building E, Polo Fibonacci, Pisa

Talk Few-Body Physics Working Group Parallel Session 2 -Few-Body Physics WG

Speaker

Alessandro Baroni (Old Dominion University, Norfolk)

Description

We present the derivation of two-nucleon axial charge and current operators in chiral effective field theory up to order Q in the power counting, where Q denotes generically the low momentum scale. The derivation is based on time-ordered perturbation theory, and accounts for cancellations between the contributions of irreducible diagrams and those due to non-static corrections from energy denominators of reducible diagrams. Renormalized terms in the axial charge are obtained by isolating divergences in loop corrections via dimensional regularization, and reabsorbing them in a subset of the low-energy constants of contact operators entering the theory at order Q. The axial current contains no divergencies at order Q and also no contact terms at this order.

Primary author

Alessandro Baroni (Old Dominion University, Norfolk)

Co-authors

Luca Girlanda (LE) Michele Viviani (PI) Prof. Rocco Schiavilla (Jefferson Lab/Old Dominion University) saori pastore (University of South Carolina)

Presentation materials