Charm semileptonic decays and|Vcs(d) from heavy clover quarks and 2+1 flavor asqtad staggered ensembles

Jon A. Bailey; D. Du; A. X. El-Khadra; Steven Gottlieb; R. D. Jain; A. S. Kronfeld; R. S. Van De Water; R. Zhou

Charm semileptonic decays and|V_cs(d) from heavy clover quarks and 2+1 flavor asqtad staggered ensembles

Jon A. Bailey, D. Du, A. X. El-Khadra, Steven Gottlieb, R. D. Jain, A. S. Kronfeld, R. S. Van De Water, R. Zhou

Integrated Sciences and Engineering Division

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

1 Citation (Scopus)

Abstract

By combining experimentally measured partial branching fractions for the semileptonic decays D→K and D→ with lattice calculations of the formfactors f D→K + (q2) and f D→ + (q2), one can extract the CKM matrix elements |Vcs| and |Vcd|. We are calculating the form factors by using Fermilab charm and asqtad staggered light and strange quarks on 2+1 flavor asqtad staggered ensembles generated by the MILC Collaboration. We vary the light valence quark masses from 0.4ms to 0.05ms (ms is the strange sea-quark mass), and the lattice spacings, from about 0.12 fm to about 0.045 fm. We extrapolate to the physical light-quark mass and the continuum limit using heavy-light meson staggered chiral perturbation theory about the SU(2) and SU(3) limits, compare the resulting (preliminary) form factor shapes with experiment, and discuss our errors.

Original language	English
Article number	232
Journal	Proceedings of Science
Volume	Part F130497
Publication status	Published - 2012
Event	30th International Symposium on Lattice Field Theory, Lattice 2012 - Cairns, Australia Duration: 2012 Jun 24 → 2012 Jun 29

Bibliographical note

Funding Information:
by the Korean government (MEST); this work was supported by grants DE-FG02-91ER40661 (S.G., R.Z.) and DE-FG02-91ER40677 (D.D., R.D.J., A.X.K.) of the U.S. DOE.

Funding Information:
From the SU(2) (SU(3)) fits above, the statistical errors in f+D→pi(0) are 4% (4%), and those in f+D→K(0), 2.3% (3%). Important systematic errors are from heavy-quark lattice artifacts, the error in r1, and the error in the axial coupling gpi. Naively updating the gpi error reduces the projected systematics to 3.4% [14, 15]. A careful estimate of all systematics reflecting the entire data set has yet to be made; the difference between our present SU(2) and SU(3) curves is in some cases comparable to the other errors. Fermilab is operated under contract DE-AC02-07CH11359 with the U.S. DOE; J.A.B. is supported by the Creative Research Initiatives Program (2012-0000241) of the NRF grant funded

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Cite this

@article{cd73e5dd3a3146119a2916a50dbea2cc,

title = "Charm semileptonic decays and|Vcs(d) from heavy clover quarks and 2+1 flavor asqtad staggered ensembles",

abstract = "By combining experimentally measured partial branching fractions for the semileptonic decays D→K and D→ with lattice calculations of the formfactors f D→K + (q2) and f D→ + (q2), one can extract the CKM matrix elements |Vcs| and |Vcd|. We are calculating the form factors by using Fermilab charm and asqtad staggered light and strange quarks on 2+1 flavor asqtad staggered ensembles generated by the MILC Collaboration. We vary the light valence quark masses from 0.4ms to 0.05ms (ms is the strange sea-quark mass), and the lattice spacings, from about 0.12 fm to about 0.045 fm. We extrapolate to the physical light-quark mass and the continuum limit using heavy-light meson staggered chiral perturbation theory about the SU(2) and SU(3) limits, compare the resulting (preliminary) form factor shapes with experiment, and discuss our errors.",

author = "Bailey, {Jon A.} and D. Du and El-Khadra, {A. X.} and Steven Gottlieb and Jain, {R. D.} and Kronfeld, {A. S.} and {Van De Water}, {R. S.} and R. Zhou",

note = "Funding Information: by the Korean government (MEST); this work was supported by grants DE-FG02-91ER40661 (S.G., R.Z.) and DE-FG02-91ER40677 (D.D., R.D.J., A.X.K.) of the U.S. DOE. Funding Information: From the SU(2) (SU(3)) fits above, the statistical errors in f+D→pi(0) are 4% (4%), and those in f+D→K(0), 2.3% (3%). Important systematic errors are from heavy-quark lattice artifacts, the error in r1, and the error in the axial coupling gpi. Naively updating the gpi error reduces the projected systematics to 3.4% [14, 15]. A careful estimate of all systematics reflecting the entire data set has yet to be made; the difference between our present SU(2) and SU(3) curves is in some cases comparable to the other errors. Fermilab is operated under contract DE-AC02-07CH11359 with the U.S. DOE; J.A.B. is supported by the Creative Research Initiatives Program (2012-0000241) of the NRF grant funded; 30th International Symposium on Lattice Field Theory, Lattice 2012 ; Conference date: 24-06-2012 Through 29-06-2012",

year = "2012",

language = "English",

volume = "Part F130497",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

}

TY - JOUR

T1 - Charm semileptonic decays and|Vcs(d) from heavy clover quarks and 2+1 flavor asqtad staggered ensembles

AU - Bailey, Jon A.

AU - Du, D.

AU - El-Khadra, A. X.

AU - Gottlieb, Steven

AU - Jain, R. D.

AU - Kronfeld, A. S.

AU - Van De Water, R. S.

AU - Zhou, R.

N1 - Funding Information: by the Korean government (MEST); this work was supported by grants DE-FG02-91ER40661 (S.G., R.Z.) and DE-FG02-91ER40677 (D.D., R.D.J., A.X.K.) of the U.S. DOE. Funding Information: From the SU(2) (SU(3)) fits above, the statistical errors in f+D→pi(0) are 4% (4%), and those in f+D→K(0), 2.3% (3%). Important systematic errors are from heavy-quark lattice artifacts, the error in r1, and the error in the axial coupling gpi. Naively updating the gpi error reduces the projected systematics to 3.4% [14, 15]. A careful estimate of all systematics reflecting the entire data set has yet to be made; the difference between our present SU(2) and SU(3) curves is in some cases comparable to the other errors. Fermilab is operated under contract DE-AC02-07CH11359 with the U.S. DOE; J.A.B. is supported by the Creative Research Initiatives Program (2012-0000241) of the NRF grant funded

PY - 2012

Y1 - 2012

N2 - By combining experimentally measured partial branching fractions for the semileptonic decays D→K and D→ with lattice calculations of the formfactors f D→K + (q2) and f D→ + (q2), one can extract the CKM matrix elements |Vcs| and |Vcd|. We are calculating the form factors by using Fermilab charm and asqtad staggered light and strange quarks on 2+1 flavor asqtad staggered ensembles generated by the MILC Collaboration. We vary the light valence quark masses from 0.4ms to 0.05ms (ms is the strange sea-quark mass), and the lattice spacings, from about 0.12 fm to about 0.045 fm. We extrapolate to the physical light-quark mass and the continuum limit using heavy-light meson staggered chiral perturbation theory about the SU(2) and SU(3) limits, compare the resulting (preliminary) form factor shapes with experiment, and discuss our errors.

AB - By combining experimentally measured partial branching fractions for the semileptonic decays D→K and D→ with lattice calculations of the formfactors f D→K + (q2) and f D→ + (q2), one can extract the CKM matrix elements |Vcs| and |Vcd|. We are calculating the form factors by using Fermilab charm and asqtad staggered light and strange quarks on 2+1 flavor asqtad staggered ensembles generated by the MILC Collaboration. We vary the light valence quark masses from 0.4ms to 0.05ms (ms is the strange sea-quark mass), and the lattice spacings, from about 0.12 fm to about 0.045 fm. We extrapolate to the physical light-quark mass and the continuum limit using heavy-light meson staggered chiral perturbation theory about the SU(2) and SU(3) limits, compare the resulting (preliminary) form factor shapes with experiment, and discuss our errors.

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UR - http://www.scopus.com/inward/citedby.url?scp=85030129421&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85030129421

SN - 1824-8039

VL - Part F130497

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 232

T2 - 30th International Symposium on Lattice Field Theory, Lattice 2012

Y2 - 24 June 2012 through 29 June 2012

ER -

Charm semileptonic decays and|V_cs(d) from heavy clover quarks and 2+1 flavor asqtad staggered ensembles

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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