$D$ to $K$ semileptonic decay form factors from HISQ light and charm quarks

Na, H.; Davies, C.T.H.; Follana, E.; Lepage, P.; Shigemitsu, J.

doi:10.22323/1.105.0315

$D$ to $K$ semileptonic decay form factors from HISQ light and charm quarks

Mar, 2011

7 pages

Part of Proceedings, 28th International Symposium on Lattice field theory (Lattice 2010) : Villasimius, Italy, June 14-19, 2010, 315

Published in:

PoS Lattice2010 (2014) 315

Contribution to:

- Lattice 2010
, 315

Published: 2014

e-Print:

1103.5419 [hep-lat]

DOI:

10.22323/1.105.0315

View in:

ADS Abstract Service

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Abstract: (arXiv)

We present a study of

D \rightarrow K, l \nu

semileptonic decays on the lattice which employs the HISQ action for both the charm and the light quarks. We work with MILC unquenched

N_f = 2 + 1

lattices and determine the scalar form factor

f_0(q^2)

. This form factor is obtained from a scalar current matrix element that does not require any operator matching. We find

f^{D \rightarrow K}_0(0) \equiv f^{D \rightarrow K}_+(0) = 0.747(19)

in the chiral plus continuum limit and hereby improve the theory error on this quantity by a factor of

\sim

4 compared to previous lattice determinations. Combining the new theory result with recent experimental measurements of the product

f^{D \rightarrow K}_+(0) * |V_{cs}|

from BaBar and CLEO-c leads to a very precise direct determination of the CKM matrix element

|V_{cs}|

,

|V_{cs}| = 0.961(11)(24)

, where the first error comes from experiment and the second is the lattice QCD theory error.

Note:

7 pages, 6 figures, and 1 table. Talk given at Lattice 2010, June 14-19, 2010, Villasimius, Italy

form factor: scalar
current: scalar
D: semileptonic decay
D: form factor
CKM matrix

References(9)

Figures(0)

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Eduardo Follana
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DDD to KKK semileptonic decay form factors from HISQ light and charm quarks

Citations per year

D semi-leptonic decay form factors with HISQ charm and light quarks

The D→K,lνD \rightarrow K, l \nuD→K,lν Semileptonic Decay Scalar Form Factor and ∣Vcs∣|V_{cs}|∣Vcs​∣ from Lattice QCD

Semileptonic decays of D mesons in three-flavor lattice QCD

Measurement of the hadronic form-factor in D0→K−e+νeD^0 \to K^{-} e^{+} \nu_{e}D0→K−e+νe​ 1

Improved measurements of D meson semileptonic decays to pi and K mesons

Review of particle physics

$D$ to $K$ semileptonic decay form factors from HISQ light and charm quarks

The $D \rightarrow K, l \nu$ Semileptonic Decay Scalar Form Factor and $|V_{cs}|$ from Lattice QCD

Measurement of the hadronic form-factor in $D^0 \to K^{-} e^{+} \nu_{e}$ 1