Using 2.92 fb-1 of electron-positron annihilation data collected at a center-of-mass energy of sort(s)=3.773 GeV with the BESIII detector, we present an improved measurement of the branching fraction B(D+-->omega e+nu_e)=(1.63±0.11±0.08)x10-3. The parameters defining the corresponding hadronic form factor ratios at zero momentum transfer are determined for the first time; we measure them to be rV=1.24±0.09±0.06 and r2=1.06±0.15±0.05. The first and second uncertainties are statistical and systematic, respectively. We also search for the decay D+-->phi e+nu_e. An improved upper limit B(D+-->phi e+nu_e)<1.3x10-5 is set at 90% confidence level.

Measurement of the form factors in the decay D+ --> omega e+ nu_e and search for the decay D+ --> phi e+ nu_e

Garzia, I.;
2015

Abstract

Using 2.92 fb-1 of electron-positron annihilation data collected at a center-of-mass energy of sort(s)=3.773 GeV with the BESIII detector, we present an improved measurement of the branching fraction B(D+-->omega e+nu_e)=(1.63±0.11±0.08)x10-3. The parameters defining the corresponding hadronic form factor ratios at zero momentum transfer are determined for the first time; we measure them to be rV=1.24±0.09±0.06 and r2=1.06±0.15±0.05. The first and second uncertainties are statistical and systematic, respectively. We also search for the decay D+-->phi e+nu_e. An improved upper limit B(D+-->phi e+nu_e)<1.3x10-5 is set at 90% confidence level.
2015
Ablikim, M.; Achasov, M. N.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Baldini Ferroli, R.; B...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2378119
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