Measurement of the Hadronic Form Factors in Ds -> phi e nu Decays

2006/07/27 by The BABAR Collaboration, B. Aubert, Aubert, B.
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0607085

21 pages, 8 postscript figues, submitted to ICHEP2006

arxiv created 2006/07/27 · arxiv updated 2009/12/01

Abstract

Based on the measured four-dimensional rate for D_s⁺ to ϕe⁺ ν_e decays, we have determined the ratios of the three hadronic form factors, r_V=V(0)/A₁(0)= 1.636 ± 0.067 ± 0.038 and r₂=A₂(0)/A₁(0)= 0.705 ± 0.056 ± 0.029, using a simple pole ansatz for the q² dependence, with fixed values of the pole masses for both the vector and axial form factors. By a separate fit to the same data, we have also extracted the pole mass for the axial form factors, m_A: r_V=V(0)/A₁(0)= 1.633 ± 0.081 ± 0.068 ,r₂=A₂(0)/A₁(0)= 0.711 ± 0.111 ± 0.096 and m_A=(2.53^+0.54_-0.35± 0.54)GeV/c²

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