Measurement of the hadronic form factor in D{sup 0}{yields}K{sup -}e{sup +}{nu}{sub e} decays

Journal Article · Sat Sep 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.052005· OSTI ID:21027673

Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A ^[1]; Tico, J Garra; Grauges, E ^[2]; Lopez, L; Palano, A ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Abrams, G S; Battaglia, M; Brown, D N; Button-Shafer, J ^[5]

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1. Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

The shape of the hadronic form factor f{sub +}(q{sup 2}) in the decay D{sup 0}{yields}K{sup -}e{sup +}{nu}{sub e} has been measured in a model independent analysis and compared with theoretical calculations. We use 75 fb{sup -1} of data recorded by the BABAR detector at the PEP-II electron-positron collider. The corresponding decay branching fraction, relative to the decay D{sup 0}{yields}K{sup -}{pi}{sup +}, has also been measured to be R{sub D}=B(D{sup 0}{yields}K{sup -}e{sup +}{nu}{sub e}({gamma}))/B(D{sup 0}{yields}K{sup -}{pi}{sup +}({gamma}))=0.927{+-}0.00 = 7{+-}0.012. From these results, and using the present world average value for B(D{sup 0}{yields}K{sup -}{pi}{sup +}), the normalization of the form factor at q{sup 2}=0 is determined to be f{sub +}(0)=0.727{+-}0.007{+-}0.005{+-}0.007 where the uncertainties are statistical, systematic, and from external inputs, respectively.

• OSTI ID: 21027673
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
D NEUTRAL MESONS
ELECTRON NEUTRINOS
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
FORM FACTORS
KAONS MINUS
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
PIONS PLUS
POSITRONS
QUANTUM CHROMODYNAMICS