Horsley, R. and Nakamura, Y. and Perlt, H. and Pleiter, D. and Rakow, P. E. L. and Schierholz, G. and Schiller, A. and Stueben, H. and Winter, F. and Zanotti, J. M. (2012) Hyperon sigma terms for 2+1 quark flavors. PHYSICAL REVIEW D, 85 (3): 034506. ISSN 2470-0010, 2470-0029
Full text not available from this repository.Abstract
QCD lattice simulations determine hadron masses as functions of the quark masses. From the gradients of these masses and using the Feynman-Hellmann theorem the hadron sigma terms can then be determined. We use here a novel approach of keeping the singlet quark mass constant in our simulations which upon using an SU(3) flavor symmetry breaking expansion gives highly constrained (i.e. few parameter) fits for hadron masses in a multiplet. This is a highly advantageous procedure for determining the hadron mass gradient as it avoids the use of delicate chiral perturbation theory. We illustrate the procedure here by estimating the light and strange sigma terms for the baryon octet.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LATTICE QCD; FORM-FACTOR; NUCLEON; MASSES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Dirk Pleiter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 19 May 2020 08:45 |
| Last Modified: | 19 May 2020 08:45 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19222 |
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