Lattice approach to semi-leptonic decays of charm mesons

Claude W. Bernard; Aida X El-Khadra; Amarjit Soni

doi:10.1016/0920-5632(92)90237-M

Lattice approach to semi-leptonic decays of charm mesons

Claude W. Bernard, Aida X El-Khadra, Amarjit Soni

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Abstract

Lattice efforts to compute matrix elements relevant to semi-leptonic form factors are reviewed. The emphasis is on D → K^* where the two groups seem to find appreciably different results for A₂(0)/A₁(0). Lattice measurements at the end-point region for both the 0^- and the 1^- final states are emphasized. All the lattice results seem to suggest that for D, D_s decays to 1^- final states, the A₁ form factor at the endpoint is always close to unity. We note that the FNAL experiment E691 does not agree with lattice results for A₁ at the endpoint; in addition it tends to disagree with our value for A₂(0)/A₁(0).

Original language	English (US)
Pages (from-to)	204-210
Number of pages	7
Journal	Nuclear Physics B (Proceedings Supplements)
Volume	26
Issue number	C
DOIs	https://doi.org/10.1016/0920-5632(92)90237-M
State	Published - 1992
Externally published	Yes

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Nuclear and High Energy Physics

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abstract = "Lattice efforts to compute matrix elements relevant to semi-leptonic form factors are reviewed. The emphasis is on D → K* where the two groups seem to find appreciably different results for A2(0)/A1(0). Lattice measurements at the end-point region for both the 0- and the 1- final states are emphasized. All the lattice results seem to suggest that for D, Ds decays to 1- final states, the A1 form factor at the endpoint is always close to unity. We note that the FNAL experiment E691 does not agree with lattice results for A1 at the endpoint; in addition it tends to disagree with our value for A2(0)/A1(0).",

author = "Bernard, {Claude W.} and El-Khadra, {Aida X} and Amarjit Soni",

year = "1992",

doi = "10.1016/0920-5632(92)90237-M",

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AU - Bernard, Claude W.

AU - El-Khadra, Aida X

AU - Soni, Amarjit

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Y1 - 1992

N2 - Lattice efforts to compute matrix elements relevant to semi-leptonic form factors are reviewed. The emphasis is on D → K* where the two groups seem to find appreciably different results for A2(0)/A1(0). Lattice measurements at the end-point region for both the 0- and the 1- final states are emphasized. All the lattice results seem to suggest that for D, Ds decays to 1- final states, the A1 form factor at the endpoint is always close to unity. We note that the FNAL experiment E691 does not agree with lattice results for A1 at the endpoint; in addition it tends to disagree with our value for A2(0)/A1(0).

AB - Lattice efforts to compute matrix elements relevant to semi-leptonic form factors are reviewed. The emphasis is on D → K* where the two groups seem to find appreciably different results for A2(0)/A1(0). Lattice measurements at the end-point region for both the 0- and the 1- final states are emphasized. All the lattice results seem to suggest that for D, Ds decays to 1- final states, the A1 form factor at the endpoint is always close to unity. We note that the FNAL experiment E691 does not agree with lattice results for A1 at the endpoint; in addition it tends to disagree with our value for A2(0)/A1(0).

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Lattice approach to semi-leptonic decays of charm mesons

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