Measurement of the gamma gamma* --> pi0 transition form factor

Abstract

We study the reaction e+e- --> e+e-pi0 and measure the gamma gamma* --> pi0 transition form factor in the momentum transfer range from 4 to 40 GeV^2. 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.

19 pages, 23 postscript figures, submitted to Phys. Rev. D

References in corpus (14)

• The BABAR Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• QCD-based pion distribution amplitudes confronting experimental data
• Study of e+e- --> pi+ pi- pi0 process using initial state radiation with BABAR
• Unbiased analysis of CLEO data at NLO and pion distribution amplitude
• Pion light-cone wave function and pion distribution amplitude in the Nambu-Jona-Lasinio model
• Analytic coupling and Sudakov effects in exclusive processes: pion and ${\gamma }^{\ast }\gamma \to {\pi }^0$ form factors
• CLEO and E791 data: A smoking gun for the pion distribution amplitude?
• High-statistics measurement of neutral-pion pair production in two-photon collisions
• High-statistics measurement of neutral-pion pair production in two-photon collisions
• Lattice measurements of nonlocal quark condensates, vacuum correlation length, and pion distribution amplitude in QCD
• Impact of the higher twist effects on the $\gamma {\gamma }^{\ast }\to {\pi }^0$ transition form factor
• New vistas of the meson structure in QCD from low to high energies
• Resummation of Large Logarithms in ${\gamma }^{\ast }{\pi }^0\to \gamma$

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