Formation time scaling and hadronization in cold nuclear matter

Details Formation time scaling and hadronization in cold nuclear matter Formation time scaling and hadronization in cold nuclear matter

2006-04-18

arxiv.org/abs/nucl-th/0604041v3

Phys.Lett.B649:384-389,2007

Physics

Nuclear Physics

Nuclear Theory

6 pages, 5 figures. Extended discussions. Low- and high formation time cuts analyzed, 1 plot added. To appear in Phys.Lett.B

Scientific paper

10.1016/j.physletb.2006.10.072

I propose a scaling analysis of the hadron multiplicity ratio measured in Deep Inelastic Scattering on nuclear targets as a tool to distinguish energy loss and nuclear absorption effects on hadron suppression in cold nuclear matter. The proposed scaling variable is a function of the hadron fractional energy and of the virtual photon energy. Its functional form, which depends on a parameter \lambda, can be fixed by general theoretical considerations and encompasses both energy loss and absorption models. The parameter \lambda is fitted to HERMES experimental data and shown to favor prehadron nuclear absorption as leading mechanism for hadron suppression as opposed to quark energy loss.

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