Application of the two-scale model to the HERMES data on nuclear attenuation
Yerevan Physics Institute, Br. Alikhanian 2, 375036, Yerevan, Armenia
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The two-scale model and its improved version were used to perform a fit to the HERMES data for the (the virtual photon energy) and z (the fraction of carried by hadron) dependences of the nuclear multiplicity ratios for and mesons electro-produced on two nuclear targets (14N and 84Kr). The quantitative criterion was used for the first time to analyze the results of the model fit to the nuclear multiplicity ratios data. The two-parameter's fit gave satisfactory agreement with the HERMES data. Best values of the parameters were then used to calculate the and z dependences of the nuclear attenuation for , K + , K -, and produced on the 84Kr target, and also make predictions for , z, and the Q 2 (the photon virtuality) dependences of the nuclear attenuation data for those identified hadrons and nuclei that will be published by HERMES.
© Springer-Verlag, 2005