Shanahan, P. E. and Horsley, R. and Nakamura, Y. and Pleiter, D. and Rakow, P. E. L. and Schierholz, G. and Stueben, H. and Thomas, A. W. and Young, R. D. and Zanotti, J. M. (2014) Electric form factors of the octet baryons from lattice QCD and chiral extrapolation. PHYSICAL REVIEW D, 90 (3): 034502. ISSN 1550-7998, 1550-2368
Full text not available from this repository.Abstract
We apply a formalism inspired by heavy-baryon chiral perturbation theory with finite-range regularization to dynamical 2 + 1-flavor CSSM/QCDSF/UKQCD Collaboration lattice QCD simulation results for the electric form factors of the octet baryons. The electric form factor of each octet baryon is extrapolated to the physical pseudoscalar masses, after finite-volume corrections have been applied, at six fixed values of Q(2) in the range 0.2-1.3 GeV2. The extrapolated lattice results accurately reproduce the experimental form factors of the nucleon at the physical point, indicating that omitted disconnected quark loop contributions are small relative to the uncertainties of the calculation. Furthermore, using the results of a recent lattice study of the magnetic form factors, we determine the ratio mu(p)G(E)(p)/G(M)(p). This quantity decreases with Q(2) in a way qualitatively consistent with recent experimental results.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PERTURBATION-THEORY; MAGNETIC-MOMENTS; QUARK MASS; NUCLEON; RATIO; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Dirk Pleiter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Aug 2019 13:20 |
| Last Modified: | 30 Aug 2019 13:20 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9748 |
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