Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-12-15
Phys.Lett. B425 (1998) 359-364
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 2 figures and 3 tables, uses epsf.sty. Added references and tables. Minor changes included
Scientific paper
10.1016/S0370-2693(98)00263-9
Central pseudoscalar production in $pp$ scattering is suppressed at small values of $Q_\perp$, where $Q$ is defined as the difference between the momenta transferred from the two protons. Such a behaviour is expected if the production occurs through the fusion of two vectors. Photon exchange could provide the dominant contribution at low transferred momenta, but we argue that an extension of the experiment could probe the gluon contribution to the proton spin.
Castoldi P.
Escribano Rafel
Frere Jean-Marie
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