[Theory-seminars] Theory Seminar on Monday

[Christopher Thomas]

Dear all,

We have a theory seminar on Monday (February 1st) at 1pm in L104: Chieh 
Jen Yang (Ohio) will be talking an "Subtractive renormalization of 
chiral effective theory NN potentials up to next-to-next-to leading 
order" --  more details below.

This is in addition to the seminars on Wednesday (Bingwei Long, 3pm, 
L104) and Friday (Alvaro Calle Cordon, 11am, A110).


----------

Monday February 1st
1pm
L104

*Subtractive renormalization of chiral effective theory NN potentials up 
to next-to-next-to leading order*

Chieh Jen Yang
(Ohio University)

We have developed a subtractive renormalization method with which we can
evaluate NN scattering phase shifts produced by the NN potential 
obtained at leading, next-to-leading, and next-to-next-to-leading order 
(NNLO) in the chiral effective theory. In this method the low-energy 
constants associated with short-distance NN physics are eliminated from 
the Lippmann-Schwinger equation (LSE) for the NN t-matrix, in favor of 
physical observables. This allows to straightforwardly compute 
scattering phase shifts for ultra-violet cutoffs of at least 10 GeV. We 
then perform detailed analyses of several renormalization issues and 
determine the maximum cutoff at which the use of an effective field NN 
potential in the LSE makes sense.

----------


A complete list of upcoming theory seminars and talks from previous
seminars are available from:
http://www.jlab.org/~thomasc/seminars/index.html

Thanks,
Christopher

-- 
Christopher Thomas

Jefferson Laboratory
12000 Jefferson Avenue
Suite #1
Newport News
VA 23606
USA

Tel: +1 (757) 269 7453
Email: thomasc at jlab.org