Measurement of the {gamma}{gamma}*{yields}{eta}{sub c} transition form factor

Journal Article · Mon Mar 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.052010· OSTI ID:21409821

Lees, J P; Poireau, V; Prencipe, E; Tisserand, V ^[1]; Garra Tico, J; Grauges, E ^[2]; Martinelli, M; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Battaglia, M; Brown, D N; Hooberman, B; Kerth, L T; Kolomensky, Yu G; Lynch, G; Osipenkov, I L; Tanabe, T ^[5]

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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. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We study the reaction e{sup +}e{sup -{yields}}e{sup +}e{sup -{eta}}{sub c}, {eta}{sub c{yields}}K{sub S}K{sup {+-}{pi}{+-}}and obtain {eta}{sub c} mass and width values 2982.2{+-}0.4{+-}1.6 MeV/c{sup 2} and 31.7{+-}1.2{+-}0.8 MeV, respectively. We find {Gamma}({eta}{sub c{yields}{gamma}{gamma}})B({eta}{sub c{yields}}KK{pi})=0.374{+-}0.009{+-}0.031 keV, and measure the {gamma}{gamma}*{yields}{eta}{sub c} transition form factor in the momentum transfer range from 2 to 50 GeV{sup 2}. The analysis is based on 469 fb{sup -1} of integrated luminosity collected at PEP-II with the BABAR detector at e{sup +}e{sup -} center-of-mass energies near 10.6 GeV.

• OSTI ID: 21409821
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevD.81.052010; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CENTER-OF-MASS SYSTEM
ELECTRON-POSITRON COLLISIONS
ELECTRONS
FORM FACTORS
GEV RANGE 01-10
LUMINOSITY
MASS
MEV RANGE
MOMENTUM TRANSFER
POSITRONS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
COLLISIONS
DIMENSIONLESS NUMBERS
ELECTRON COLLISIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
LEPTONS
MATTER
OPTICAL PROPERTIES
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
POSITRON COLLISIONS