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

MILC Collaborations

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

MILC Collaborations

Integrated Sciences and Engineering Division

Research output: Contribution to journal › Conference article › peer-review

Abstract

The experimentally measured rates of the semileptonic decays K → πl and D → K(π)l can be combined with lattice calculations of the associated form factors to precisely extract the CKM matrix elements |V_us| and |V_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 → πl 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 → πl form factor f₊ ^Kπ(0) and describe tests of our method.

Original language	English
Journal	Proceedings of Science
Volume	105
Publication status	Published - 2010
Event	28th International Symposium on Lattice Field Theory, Lattice 2010 - Villasimius, Sardinia, Italy Duration: 2010 Jun 14 → 2010 Jun 19

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© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

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@article{afca8b1522ab4c3aa88c5b3e7a56d182,

title = "Semileptonic decays of K and D mesons in 2 + 1 flavor QCD",

abstract = "The experimentally measured rates of the semileptonic decays K → πl and D → K(π)l can be combined with lattice calculations of the associated form factors to precisely extract the CKM matrix elements |Vus| and |Vcs(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 → πl 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 → πl form factor f+ Kπ(0) and describe tests of our method.",

author = "{MILC Collaborations} and Bailey, {Jon A.} and A. Bazavov and C. Bernard and C. Bouchard and C. DeTar and El-Khadra, {A. X.} and Freeland, {E. D.} and E. G{\'a}miz and Steven Gottlieb and Heller, {U. M.} and Hetrick, {J. E.} and Kronfeld, {A. S.} and J. Laiho and L. Levkova and Mackenzie, {P. B.} and Oktay, {M. B.} and Simone, {J. N.} and R. Sugar and D. Toussaint and {Van De Water}, {R. S.} and Fermilab Lattice",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.; 28th International Symposium on Lattice Field Theory, Lattice 2010 ; Conference date: 14-06-2010 Through 19-06-2010",

year = "2010",

language = "English",

volume = "105",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

}

TY - JOUR

T1 - Semileptonic decays of K and D mesons in 2 + 1 flavor QCD

AU - MILC Collaborations

AU - Bailey, Jon A.

AU - Bazavov, A.

AU - Bernard, C.

AU - Bouchard, C.

AU - DeTar, C.

AU - El-Khadra, A. X.

AU - Freeland, E. D.

AU - Gámiz, E.

AU - Gottlieb, Steven

AU - Heller, U. M.

AU - Hetrick, J. E.

AU - Kronfeld, A. S.

AU - Laiho, J.

AU - Levkova, L.

AU - Mackenzie, P. B.

AU - Oktay, M. B.

AU - Simone, J. N.

AU - Sugar, R.

AU - Toussaint, D.

AU - Van De Water, R. S.

AU - Lattice, Fermilab

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

PY - 2010

Y1 - 2010

N2 - The experimentally measured rates of the semileptonic decays K → πl and D → K(π)l can be combined with lattice calculations of the associated form factors to precisely extract the CKM matrix elements |Vus| and |Vcs(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 → πl 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 → πl form factor f+ Kπ(0) and describe tests of our method.

AB - The experimentally measured rates of the semileptonic decays K → πl and D → K(π)l can be combined with lattice calculations of the associated form factors to precisely extract the CKM matrix elements |Vus| and |Vcs(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 → πl 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 → πl form factor f+ Kπ(0) and describe tests of our method.

UR - http://www.scopus.com/inward/record.url?scp=85055318051&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85055318051&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85055318051

SN - 1824-8039

VL - 105

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 28th International Symposium on Lattice Field Theory, Lattice 2010

Y2 - 14 June 2010 through 19 June 2010

ER -

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

Abstract

Bibliographical note

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