Taste violations in the scalar correlator in mixed action simulations

Conference · Mon Oct 01 00:00:00 EDT 2007

OSTI ID:917433

Aubin, C; Laiho, Jack; Van de Water, Ruth S

We study the behavior of the isovector scalar correlator, which is particularly sensitive to lattice artifacts, using domain-wall valence quarks on a staggered sea (generated by the MILC collaboration). We analyze this according to the prediction from chiral perturbation theory determined by Prelovsek, which indicates that the leading unitarity violations come from taste breaking effects. We show that our data behaves in the way predicted by Prelovsek, thus verifying that the largest contribution to the violations of unitarity which arise at finite lattice spacing can be described by the mixed-action chiral perturbation theory.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 917433
• Report Number(s): FERMILAB-CONF-07-524-T; arXiv eprint number arXiv:0710.0804; TRN: US0804536
• Resource Relation: Conference: Presented at 25th International Symposium on Lattice Field Theory, Regensburg, Germany, 30 Jul - 4 Aug 2007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
FORECASTING
ISOVECTORS
LATTICE FIELD THEORY
PERTURBATION THEORY
QUARKS
SCALARS
SEAS
UNITARITY
VALENCE
Lattice