We report on the status of our kaon semileptonic form factor calculations using the highlyimproved staggered quark (HISQ) formulation to simulate the valence fermions. We present results for the form factor f Kp + (0) on the asqtad Nf = 2+1 MILC configurations, discuss the chiral-continuum extrapolation, and give a preliminary estimate of the total error. We also present a more preliminary set of results for the same form factor but with the sea quarks also simulated with the HISQ action; these results include data at the physical light quark masses. The improvements that we expect to achieve with the use of the HISQ configurations and simulations at the physical quark masses are briefly discussed.
|Journal||Proceedings of Science|
|Publication status||Published - 2012|
|Event||30th International Symposium on Lattice Field Theory, Lattice 2012 - Cairns, Australia|
Duration: 2012 Jun 24 → 2012 Jun 29
Bibliographical noteFunding Information:
∗Speaker. †Operated by Brookhaven Science Associates, LLC, under Contract No. DE-AC02-98CH10886 with the United States Department of Energy. ‡Operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.
We thank Johan Bijnens for making his NLO partially quenched χPT and NNLO full QCD χPT codes available to us. Computations for this work were carried out with resources provided by the USQCD Collaboration and the Argonne Leadership Computing Facility, the National Energy Research Scientific Computing Center, and the Los Alamos National Laboratory, which are funded by the Office of Science of the U.S. Department of Energy; and with resources provided by the National Institute for Computational Science, the Pittsburgh Supercomputer Center, the San Diego Supercomputer Center, and the Texas Advanced Computing Center, which are funded through the National Science Foundation’s Teragrid/XSEDE Program. This work was supported in part by the MICINN (Spain) under grant FPA2010-16696 and Ramón y Cajal program (E.G.), Junta de Andalucía (Spain) under grants FQM-101, FQM-330, and FQM-6552 (E.G.), European Commission under Grant No. PCIG10-GA-2011-303781 (E.G.), by the U.S. Department of Energy under Grant No. DE-FG02-91ER40677 (A.X.E.) and DE-FG02-91ER40628 (C.W.B.), and by the U.S. National Science Foundation under grants PHY0757333 and PHY1067881 (C.D.).
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