TY - JOUR
T1 - Chiral logs with staggered fermions
AU - Aubin, C.
AU - Bernard, C.
AU - DeTar, C.
AU - Gottlieb, Steven
AU - Heller, Urs M.
AU - Orginos, K.
AU - Sugar, R.
AU - Toussaint, D.
N1 - Funding Information:
We are grateful to M. Golterman, G. P. Lepage, and S. Sharpe for very useful discussions. Computations were performed at LANL, NERSC, NCSA, ORNL, PSC and SDSC. This work was supported by the U.S. DOE and NSF.
PY - 2003/5
Y1 - 2003/5
N2 - We compute chiral logarithms in the presence of "taste" symmetry breaking of staggered fermions. The lagrangian of Lee and Sharpe is generalized and then used to calculate the logs in π and K masses. We correct an error in Ref. [1]. MILC data with three light dynamical flavors can be well fit by our formulas. However, two new chiral parameters, which describe O(a2) hairpin diagrams for taste-nonsinglet mesons, enter in the fits. To obtain precise results for the physical O(p4) coefficients, these new parameters will need to be bounded.
AB - We compute chiral logarithms in the presence of "taste" symmetry breaking of staggered fermions. The lagrangian of Lee and Sharpe is generalized and then used to calculate the logs in π and K masses. We correct an error in Ref. [1]. MILC data with three light dynamical flavors can be well fit by our formulas. However, two new chiral parameters, which describe O(a2) hairpin diagrams for taste-nonsinglet mesons, enter in the fits. To obtain precise results for the physical O(p4) coefficients, these new parameters will need to be bounded.
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U2 - 10.1016/S0920-5632(03)01511-1
DO - 10.1016/S0920-5632(03)01511-1
M3 - Article
AN - SCOPUS:0038286380
VL - 119
SP - 233
EP - 235
JO - Nuclear and Particle Physics Proceedings
JF - Nuclear and Particle Physics Proceedings
SN - 2405-6014
ER -