Para acceder a los documentos con el texto completo, por favor, siga el siguiente enlace: http://hdl.handle.net/2445/131639
Título:
|
Measurement of the γγ*→π0 transition form factor
|
Autor/a:
|
Garra Ticó, Jordi; Graugés Pous, Eugeni; BABAR Collaboration
|
Otros autores:
|
Universitat de Barcelona |
Abstract:
|
We study the reaction e + e − → e + e − π 0 in the single tag mode and measure the differential cross section d σ / d Q 2 and the γ γ ∗ → π 0 transition form factor in the momentum transfer range from 4 to 40 GeV 2 . At Q 2 > 10 GeV 2 the measured form factor exceeds the asymptotic limit predicted by perturbative QCD. The analysis is based on 442 fb − 1 of integrated luminosity collected at PEP-II with the BABAR detector at e + e − center-of-mass energies near 10.6 GeV. |
Materia(s):
|
-Física de partícules -Experiments -Particle physics -Experiments |
Derechos:
|
(c) American Physical Society, 2009
|
Tipo de documento:
|
Artículo Artículo - Versión publicada |
Editor:
|
American Physical Society
|
Compartir:
|
|
Mostrar el registro completo del ítem