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16 papers · 2 filters
QCD Factorizations in Exclusive gamma* gamma* -> rho0_L rho0_L
B. Pire, M. Segond, L. Szymanowski +1
The exclusive process e+ e- -> e+ e-rho0_L rho0_L allows to study various dynamics and factorization properties of perturbative QCD. At moderate energy, we demonstrate how collinea…
Anomalous GPDs in the photon
S. Friot, B. Pire, L. Szymanowski
We consider deeply virtual Compton scattering (DVCS) on a photon target, in the generalized Bjorken limit, at the Born order and in the leading logarithmic approximation. This lead…
Two-photon decay of heavy quarkonium from heavy-quark spin symmetry
T. N. Pham
With the recent measurements on and at CLEO, Babar and Belle, and with the prospect of finding the at the Tevatron, it seems appropriate to have an…
Production of a pion in association with a high-Q2 dilepton pair in antiproton-proton annihilation at GSI-FAIR
J. P. Lansberg, B. Pire, L. Szymanowski
We evaluate the cross section for anti-p p -> l+ l- pi0 in the forward direction and for large lepton pair invariant mass. In this kinematical region, the leading-twist amplitude f…
A dispersive approach to Sudakov resummation
Einan Gardi, Georges Grunberg
We present a general all-order formulation of Sudakov resummation in QCD in terms of dispersion integrals. We show that the Sudakov exponent can be written as a dispersion integral…
Probing Transversity GPDs in Photo and Electroproduction of Two Vector Mesons
B. Pire, L. Szymanowski
Electroproduction of two mesons well separated in rapidity allows the first feasible selective access to chiral-odd transversity GPDs provided one of these mesons is a transversely…