Braun, V. M. and Collins, S. and Goeckeler, M. and Perez-Rubio, P. and Schaefer, A. and Schiel, R. W. and Sternbeck, A. (2015) Second moment of the pion light-cone distribution amplitude from lattice QCD. PHYSICAL REVIEW D, 92 (1): 014504. ISSN 2470-0010, 2470-0029
Full text not available from this repository. (Request a copy)Abstract
We present the results of a lattice study of the second moment of the light-cone pion distribution amplitude using two flavors of dynamical (clover) fermions on lattices of different volumes and pion masses down to m(pi) similar to 150 MeV. At lattice spacings between 0.06 and 0.08 fm we find for the second Gegenbauer moment the value a(2) = 0.1364(154)145) at the scale mu = 2 GeV in the (MS) over bar scheme, where the first error is statistical including the uncertainty of the chiral extrapolation, and the second error is the estimated uncertainty coming from the nonperturbatively determined renormalization factors. The error due to the continuum extrapolation cannot be quantified yet and is the only remaining significant source of uncertainty.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HADRONIC FORM-FACTORS; EXCLUSIVE PROCESSES; SUM-RULES; QUANTUM; FACTORIZATION; VIOLATION; OPERATORS; DECAYS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Jul 2019 13:02 |
| Last Modified: | 05 Jul 2019 13:02 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5193 |
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