Semileptonic decays of K and D mesons in 2+1 flavor QCD

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The experimentally measured rates of the semileptonic decays K {yields} {pi}/{nu} and D {yields} K({pi})/{nu} can be combined with lattice calculations of the associated form factors to precisely extract the CKM matrix elements |V{sub us}| and |V{sub cs(d)}|. We report on the status of form factor calculations with Fermilab charm quarks and staggered light quarks on the 2+1 flavor asqtad staggered MILC ensembles. Analysis of data for the D {yields} {pi}/{nu} form factor provides a nontrivial test of our methods via comparison with CLEO data. We discuss the use of HISQ valence quarks to calculate the K {yields} {pi}/{nu} form ... continued below

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Bailey, Jon A.; Bazavov, A.; Bernard, C.; Bouchard, C.M.; DeTar, C.; El-Khadra, A.X. et al. November 1, 2010.

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The experimentally measured rates of the semileptonic decays K {yields} {pi}/{nu} and D {yields} K({pi})/{nu} can be combined with lattice calculations of the associated form factors to precisely extract the CKM matrix elements |V{sub us}| and |V{sub cs(d)}|. We report on the status of form factor calculations with Fermilab charm quarks and staggered light quarks on the 2+1 flavor asqtad staggered MILC ensembles. Analysis of data for the D {yields} {pi}/{nu} form factor provides a nontrivial test of our methods via comparison with CLEO data. We discuss the use of HISQ valence quarks to calculate the K {yields} {pi}/{nu} form factor f{sub +}{sup K{pi}}(0) and describe tests of our method.

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  • Journal Name: PoS Lattice2010:306,2010

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  • Report No.: FERMILAB-CONF-10-447-T
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 993221
  • Archival Resource Key: ark:/67531/metadc1014481

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  • November 1, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 25, 2017, 4:31 p.m.

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Bailey, Jon A.; Bazavov, A.; Bernard, C.; Bouchard, C.M.; DeTar, C.; El-Khadra, A.X. et al. Semileptonic decays of K and D mesons in 2+1 flavor QCD, article, November 1, 2010; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc1014481/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.