We present heavy-meson spectrum results obtained using the Oktay-Kronfeld (OK) action on MILC asqtad lattices. The OK action was designed to improve the heavy-quark action of the Fermilab formulation, such that heavy-quark discretization errors are reduced. The OK action includes dimension-6 and -7 operators necessary for tree-level matching to QCD through order O(Λ3/m3 Q) for heavy-light mesons and O(ν6) for quarkonium, or, equivalently, through O(a2) with some O(a3) terms with Symanzik power counting. To assess the improvement, we extend previous numerical tests with heavy-meson masses by analyzing data generated on a finer (a ≈ 0.12 fm) lattice with the correct tadpole factors for the c5 term in the action. We update the analyses of the inconsistency parameter and the hyperfine splittings for the rest and kinetic masses.
|Journal||Proceedings of Science|
|Publication status||Published - 2014|
|Event||32nd International Symposium on Lattice Field Theory, LATTICE 2014 - New York, United States|
Duration: 2014 Jun 23 → 2014 Jun 28
Bibliographical noteFunding Information:
C.D. is supported in part by the U.S. Department of Energy under grant No. DE-FC02-12ER-41879 and the U.S. National Science Foundation under grant PHY10-034278. A.S.K. is supported in part by the German Excellence Initiative and the European Union Seventh Framework Programme under grant agreement No. 291763 as well as the European Union’s Marie Curie CO-FUND program. Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. The research of W. Lee is supported by the Creative Research Initiatives Program (No. 2014001852) of the NRF grant funded by the Korean government (MEST). W. Lee would like to acknowledge the support from KISTI supercomputing center through the strategic support program for the supercomputing application research [No. KSC-2013-G2-005]. Part of computations were carried out on the DAVID GPU clusters at Seoul National University. J.A.B. is supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2014027937).
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