Analysis of the D{sup +}{yields}K{sup -}{pi}{sup +}e{sup +}{nu}{sub e} decay channel

Journal Article · Fri Apr 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.072001· OSTI ID:21537691

Amo Sanchez, P del; Lees, J P; Poireau, V; Prencipe, E; Tisserand, V ^[1]; Garra Tico, J; Grauges, E ^[2]; Martinelli, M; Palano, A; Pappagallo, M ^[3]; Milanes, D A ^[4]; Eigen, G; Stugu, B; Sun, L ^[5]; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G; Osipenkov, I L ^[6]; Koch, H ^[7]

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1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. INFN Sezione di Bari, I-70126 Bari (Italy)
4. Dipartimento di Fisica, Universita di Bari, I-70126 Bari (Italy)
5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
6. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
7. Ruhr Universitaet Bochum, Institut fuer Experimentalphysik 1, D-44780 Bochum (Germany)

Using 347.5 fb{sup -1} of data recorded by the BABAR detector at the PEP-II electron-positron collider, 244x10{sup 3} signal events for the D{sup +}{yields}K{sup -}{pi}{sup +}e{sup +}{nu}{sub e} decay channel are analyzed. This decay mode is dominated by the K*(892){sup 0} contribution. We determine the K*(892){sup 0} parameters: m{sub K}{sup *}{sub (892)}{sup 0}=(895.4{+-}0.2{+-}0.2) MeV/c{sup 2}, {Gamma}{sub K}{sup *}{sub (892)}{sup 00}=(46.5{+-}0.3{+-}0.2) MeV/c{sup 2}, and the Blatt-Weisskopf parameter r{sub BW}=2.1{+-}0.5{+-}0.5 (GeV/c){sup -1}, where the first uncertainty comes from statistics and the second from systematic uncertainties. We also measure the parameters defining the corresponding hadronic form factors at q{sup 2}=0 (r{sub V}=(V(0)/A{sub 1}(0))=1.463{+-}0.017{+-}0.031, r{sub 2}=(A{sub 2}(0)/A{sub 1}(0))=0.801{+-}0.020{+-}0.020) and the value of the axial-vector pole mass parametrizing the q{sup 2} variation of A{sub 1} and A{sub 2}: m{sub A}=(2.63{+-}0.10{+-}0.13) GeV/c{sup 2}. The S-wave fraction is equal to (5.79{+-}0.16{+-}0.15)%. Other signal components correspond to fractions below 1%. Using the D{sup +}{yields}K{sup -}{pi}{sup +}{pi}{sup +} channel as a normalization, we measure the D{sup +} semileptonic branching fraction: B(D{sup +}{yields}K{sup -}{pi}{sup +}e{sup +}{nu}{sub e})=(4.00{+-}0.03{+-}0.04{+-}0.09)x10{sup -2}, where the third uncertainty comes from external inputs. We then obtain the value of the hadronic form factor A{sub 1} at q{sup 2}=0: A{sub 1}(0)=0.6200{+-}0.0056{+-}0.0065{+-}0.0071. Fixing the P-wave parameters, we measure the phase of the S wave for several values of the K{pi} mass. These results confirm those obtained with K{pi} production at small momentum transfer in fixed target experiments.

• OSTI ID: 21537691
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 7; Other Information: DOI: 10.1103/PhysRevD.83.072001; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
ELECTRON NEUTRINOS
ELECTRONS
FORM FACTORS
K*-892 MESONS
KAONS MINUS
MASS
MOMENTUM TRANSFER
P WAVES
PARTICLE DECAY
PEP STORAGE RINGS
PIONS PLUS
POSITRONS
S WAVES
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
KAONS
LEPTONS
MASSLESS PARTICLES
MATTER
MESONS
NEUTRINOS
PARTIAL WAVES
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
STORAGE RINGS
STRANGE MESONS
STRANGE PARTICLES
VECTOR MESONS