Large multiplicity fluctuations and saturation effects in onium collisions

Details Large multiplicity fluctuations and saturation effects in onium collisions Large multiplicity fluctuations and saturation effects in onium collisions

1996-05-14

arxiv.org/abs/hep-ph/9605302v1

Nucl.Phys.B475:293-320,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages LaTeX2e, 11 figures included using epsfig. Compressed postscript of whole paper also available at http://www.hep.ph

Scientific paper

10.1016/0550-3213(96)00336-7

This paper studies two related questions in high energy onium-onium scattering: the probability of producing an unusually large number of particles in a collision, where it is found that the cross section for producing a central multiplicity proportional to $k$ should decrease exponentially in $\sqrt{k}$. Secondly, the nature of gluon (dipole) evolution when dipole densities become so high that saturation effects due to dipole-dipole interactions become important: measures of saturation are developed to help understand when saturation becomes important, and further information is obtained by exploiting changes of frame, which interchange unitarity and saturation corrections.

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