Measurement of the form-factor ratios for D+ ---&gt; anti-K*0 lepton+ lepton-neutrino

Aitala, E. M.

doi:10.1016/S0370-2693(98)01243-X

Measurement of the form-factor ratios for D+ ---> anti-K*0 lepton+ lepton-neutrino

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Phys.Lett.B

DOI:https://doi.org/10.1016/S0370-2693(98)01243-X· OSTI ID:1892196

Aitala, E. M.

The form factor ratios rv=V(0)/A1(0), r2=A2(0)/A1(0) and r3=A3(0)/A1(0) in the decay D+ --> K* l nu, K* -->K-pi+ have been measured using data from charm hadroproduction experiment E791 at Fermilab. From 3034 (595) signal (background) events in the muon channel, we obtain rv=1.84+-0.11+-0.09, r2=0.75+-0.08+-0.09 and, as a first measurement of r3, we find 0.04+-0.33 +-0.29. The values of the form factor ratios rv and r2 measured for the muon channel are combined with the values of rv and r2 that we have measured in the electron channel. The combined E791 results for the muon and electron channels are rv=1.87+-0.08+-0.07 and r2=0.73+-0.06+-0.08.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: E791

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1892196

Report Number(s):: KSU-HEP-98-001; FERMILAB-PUB-98-289-E; arXiv:hep-ex/9809026; oai:inspirehep.net:476799

Journal Information:: Phys.Lett.B, Journal Name: Phys.Lett.B Vol. 440

Country of Publication:: United States

Language:: English

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