D meson Semileptonic Decay Form Factors at q2 = 0

Ruizi Li; A. Bazavov; C. W. Bernard; C. DeTar; D. Du; A. X. El-Khadra; E. Gámiz; S. Gottlieb; U. M. Heller; J. Komijani; A. S. Kronfeld; J. Laiho; P. B. Mackenzie; E. T. Neil; T. Primer; J. N. Simone; R. L. Sugar; D. Toussaint; R. S. Van De Water; R. Zhou

D meson Semileptonic Decay Form Factors at q² = 0

Ruizi Li, A. Bazavov, C. W. Bernard, C. DeTar, D. Du, A. X. El-Khadra, E. Gámiz, S. Gottlieb, U. M. Heller, J. Komijani, A. S. Kronfeld, J. Laiho, P. B. Mackenzie, E. T. Neil, T. Primer, J. N. Simone, R. L. Sugar, D. Toussaint, R. S. Van De Water, R. Zhou

Physics

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

Abstract

We discuss preliminary results for the vector form factors f₊^{π,K} at zero-momentum transfer for the decays D → π`ν and D → K`ν using MILC’s N_f = 2 + 1 + 1 HISQ ensembles at four lattice spacings, a ≈ 0.042,0.06,0.09, and 0.12 fm, and various HISQ quark masses down to the (degenerate) physical light quark mass. We use the kinematic constraint f₊(q²) = f₀(q²) at q² = 0 to determine the vector form factor from our study of the scalar current, which yields f₀(0). Results are extrapolated to the continuum physical point in the framework of hard pion/kaon SU(3) heavy-meson-staggered χPT and Symanzik effective theory. Our calculation improves upon the precision achieved in existing lattice-QCD calculations of the vector form factors at q² = 0. We show the values of the CKM matrix elements |V_cs| and |V_cd| that we would obtain using our preliminary results for the form factors together with recent experimental results, and discuss the implications of these values for the second row CKM unitarity.

Original language	English (US)
Article number	269
Journal	Proceedings of Science
Volume	334
State	Published - 2018
Event	36th Annual International Symposium on Lattice Field Theory, LATTICE 2018 - East Lansing, United States Duration: Jul 22 2018 → Jul 28 2018

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Li, R., Bazavov, A., Bernard, C. W., DeTar, C., Du, D., El-Khadra, A. X., Gámiz, E., Gottlieb, S., Heller, U. M., Komijani, J., Kronfeld, A. S., Laiho, J., Mackenzie, P. B., Neil, E. T., Primer, T., Simone, J. N., Sugar, R. L., Toussaint, D., Van De Water, R. S., & Zhou, R. (2018). D meson Semileptonic Decay Form Factors at q² = 0. Proceedings of Science, 334, Article 269.

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title = "D meson Semileptonic Decay Form Factors at q2 = 0",

abstract = "We discuss preliminary results for the vector form factors f+{π,K} at zero-momentum transfer for the decays D → π`ν and D → K`ν using MILC{\textquoteright}s Nf = 2 + 1 + 1 HISQ ensembles at four lattice spacings, a ≈ 0.042,0.06,0.09, and 0.12 fm, and various HISQ quark masses down to the (degenerate) physical light quark mass. We use the kinematic constraint f+(q2) = f0(q2) at q2 = 0 to determine the vector form factor from our study of the scalar current, which yields f0(0). Results are extrapolated to the continuum physical point in the framework of hard pion/kaon SU(3) heavy-meson-staggered χPT and Symanzik effective theory. Our calculation improves upon the precision achieved in existing lattice-QCD calculations of the vector form factors at q2 = 0. We show the values of the CKM matrix elements |Vcs| and |Vcd| that we would obtain using our preliminary results for the form factors together with recent experimental results, and discuss the implications of these values for the second row CKM unitarity.",

author = "Ruizi Li and A. Bazavov and Bernard, {C. W.} and C. DeTar and D. Du and El-Khadra, {A. X.} and E. G{\'a}miz and S. Gottlieb and Heller, {U. M.} and J. Komijani and Kronfeld, {A. S.} and J. Laiho and Mackenzie, {P. B.} and Neil, {E. T.} and T. Primer and Simone, {J. N.} and Sugar, {R. L.} and D. Toussaint and {Van De Water}, {R. S.} and R. Zhou",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons.; 36th Annual International Symposium on Lattice Field Theory, LATTICE 2018 ; Conference date: 22-07-2018 Through 28-07-2018",

year = "2018",

language = "English (US)",

volume = "334",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab Srl",

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TY - JOUR

T1 - D meson Semileptonic Decay Form Factors at q2 = 0

AU - Li, Ruizi

AU - Bazavov, A.

AU - Bernard, C. W.

AU - DeTar, C.

AU - Du, D.

AU - El-Khadra, A. X.

AU - Gámiz, E.

AU - Gottlieb, S.

AU - Heller, U. M.

AU - Komijani, J.

AU - Kronfeld, A. S.

AU - Laiho, J.

AU - Mackenzie, P. B.

AU - Neil, E. T.

AU - Primer, T.

AU - Simone, J. N.

AU - Sugar, R. L.

AU - Toussaint, D.

AU - Van De Water, R. S.

AU - Zhou, R.

PY - 2018

Y1 - 2018

N2 - We discuss preliminary results for the vector form factors f+{π,K} at zero-momentum transfer for the decays D → π`ν and D → K`ν using MILC’s Nf = 2 + 1 + 1 HISQ ensembles at four lattice spacings, a ≈ 0.042,0.06,0.09, and 0.12 fm, and various HISQ quark masses down to the (degenerate) physical light quark mass. We use the kinematic constraint f+(q2) = f0(q2) at q2 = 0 to determine the vector form factor from our study of the scalar current, which yields f0(0). Results are extrapolated to the continuum physical point in the framework of hard pion/kaon SU(3) heavy-meson-staggered χPT and Symanzik effective theory. Our calculation improves upon the precision achieved in existing lattice-QCD calculations of the vector form factors at q2 = 0. We show the values of the CKM matrix elements |Vcs| and |Vcd| that we would obtain using our preliminary results for the form factors together with recent experimental results, and discuss the implications of these values for the second row CKM unitarity.

AB - We discuss preliminary results for the vector form factors f+{π,K} at zero-momentum transfer for the decays D → π`ν and D → K`ν using MILC’s Nf = 2 + 1 + 1 HISQ ensembles at four lattice spacings, a ≈ 0.042,0.06,0.09, and 0.12 fm, and various HISQ quark masses down to the (degenerate) physical light quark mass. We use the kinematic constraint f+(q2) = f0(q2) at q2 = 0 to determine the vector form factor from our study of the scalar current, which yields f0(0). Results are extrapolated to the continuum physical point in the framework of hard pion/kaon SU(3) heavy-meson-staggered χPT and Symanzik effective theory. Our calculation improves upon the precision achieved in existing lattice-QCD calculations of the vector form factors at q2 = 0. We show the values of the CKM matrix elements |Vcs| and |Vcd| that we would obtain using our preliminary results for the form factors together with recent experimental results, and discuss the implications of these values for the second row CKM unitarity.

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UR - http://www.scopus.com/inward/citedby.url?scp=85069969228&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85069969228

SN - 1824-8039

VL - 334

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 269

T2 - 36th Annual International Symposium on Lattice Field Theory, LATTICE 2018

Y2 - 22 July 2018 through 28 July 2018

ER -

D meson Semileptonic Decay Form Factors at q² = 0

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