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On the $Q^2$ dependence of nuclear structure functions

Author:
D. Indumathi A1  


Journal:
Zeitschrift für Physik C Particles and Fields


Issue Date:
1997


Abstract(summary):

Abstract. The recent high statisticsNMC data on the Tin to Carbon structure function ratio seems to indicate, for the first time, a significant $Q^2$ dependence, especially at small values of Bjorken $x$, $x < 0.05$, and $Q^2 > 1$ GeV$^2$. A purely $\log(Q^2)$-type dependence of the structure functions, which is consistent with the free nucleon data, yields a fairly flat ratio with little or no $Q^2$ dependence. In view of this seeming contradiction, we re-examine the applicability of such a model to nuclear structure functions in such a kinematical regime. We find that the model is consistent with all data, within experimental errors, without any need for introducing additional $Q^2$ dependences or higher twist contributions. The model correctly reproduces the $Q^2$ dependence of the Carbon structure function as well. We also critically examine the $Q^2$ dependence of the corresponding spin dependent structure functions.



Page:
91-97


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