Δ mix parameter in the overlap on domain-wall mixed action

M. Lujan, A. Alexandru, Y. Chen, T. Draper, W. Freeman, M. Gong, F. X. Lee, A. Li, K. F. Liu, N. Mathur

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

A direct calculation of the mixed action parameter Δ mix with valence overlap fermions on a domain-wall fermion sea is presented. The calculation is performed on four ensembles of the 2+1 flavor domain-wall gauge configurations: 243×64 (am l=0.005, a=0.114fm) and 323×64 (am l=0.004, 0.006, 0.008, a=0.085fm). For pion masses close to 300 MeV we find Δ mix=0.030(6)GeV4 at a=0.114fm and Δ mix=0.033(12)GeV4 at a=0.085fm. The results are quite independent of the lattice spacing and they are significantly smaller than the results for valence domain-wall fermions on asqtad sea or those of valence overlap fermions on clover sea. Combining the results extracted from these two ensembles, we get Δ mix=0.030(6)(5)GeV4, where the first error is statistical and the second is the systematic error associated with the fitting method.

Original languageEnglish (US)
Article number014501
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume86
Issue number1
DOIs
StatePublished - Jul 5 2012
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Lujan, M., Alexandru, A., Chen, Y., Draper, T., Freeman, W., Gong, M., Lee, F. X., Li, A., Liu, K. F., & Mathur, N. (2012). Δ mix parameter in the overlap on domain-wall mixed action. Physical Review D - Particles, Fields, Gravitation and Cosmology, 86(1), [014501]. https://doi.org/10.1103/PhysRevD.86.014501