Measurement of the form-factor ratios for D+(s) ---&gt; phi lepton+ neutrino(lepton)

Aitala, E. M.

doi:10.1016/S0370-2693(99)00141-0

Measurement of the form-factor ratios for D+(s) ---> phi lepton+ neutrino(lepton)

Journal Article · Tue Dec 01 04:00:00 EST 1998 · Phys.Lett.B

DOI:https://doi.org/10.1016/S0370-2693(99)00141-0· OSTI ID:1893429

Aitala, E. M.

We have measured the form factor ratios r_V = V(0)/A_1(0) and r_2 = A_2(0)/A_1(0) for the decay D_s^+ -> phi ell^+ nu_ell, phi -> K^+ K^-, using data from charm hadroproduction experiment E791 at Fermilab. Results are based on 144 signal and 22 background events in the electron channel and 127 signal and 34 background events in the muon channel. We combine the measurements from both lepton channels to obtain r_V = 2.27 +- 0.35 +- 0.22 and r_2 = 1.57 +- 0.25 +- 0.19.

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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:: 1893429

Report Number(s):: KSU-HEP-98-002; FERMILAB-PUB-98-330-E; arXiv:hep-ex/9812013; oai:inspirehep.net:480733

Journal Information:: Phys.Lett.B, Journal Name: Phys.Lett.B Vol. 450

Country of Publication:: United States

Language:: English

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