A large sample of D0 decaying to K μ ν and D0 decaying to pi μ ν collected by the FOCUS photoproduction experiment at Fermilab has been used to perform a new measurements of the q2 dependence for the f+(q2) form factor. These measured f+(q2) form factors are fit to common parameterizations such as the pole dominance form and compared to unquenched Lattice QCD calculations. We find mpole = 1.93 ± 0.05 ± 0.03 GeV/c2 for D0 --> K μ ν and mpole = 1.91+0.30 −0.15 ± 0.07 GeV/c2 for D0 --> pi μ ν and f(K)− (0)/f(K)+ (0) = −1.7+1.5 −1.4 ± 0.3.
MEASUREMENTS OF THE Q**2 DEPENDENCE OF THE D0 -> K- MU+ NU AND D0 -> PI- MU+ NU FORM FACTORS
BOCA, GIANLUIGI;LIGUORI, GIUSEPPE;LOPES PEGNA, DAVID;MERLO, MARCO MASSIMILIANO;RATTI, SERGIO PEPPINO;RICCARDI, CRISTINA;VITULO, PAOLO;
2005-01-01
Abstract
A large sample of D0 decaying to K μ ν and D0 decaying to pi μ ν collected by the FOCUS photoproduction experiment at Fermilab has been used to perform a new measurements of the q2 dependence for the f+(q2) form factor. These measured f+(q2) form factors are fit to common parameterizations such as the pole dominance form and compared to unquenched Lattice QCD calculations. We find mpole = 1.93 ± 0.05 ± 0.03 GeV/c2 for D0 --> K μ ν and mpole = 1.91+0.30 −0.15 ± 0.07 GeV/c2 for D0 --> pi μ ν and f(K)− (0)/f(K)+ (0) = −1.7+1.5 −1.4 ± 0.3.File in questo prodotto:
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