Evolution of the longitudinal structure function at small x
Physics Department, Razi University, 67149, Kermanshah, Iran
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Accepted: 7 January 2014
Published online: 3 February 2014
We derive an approximation approach to evolution of the longitudinal structure function, by using a Laplace-transform method. We solve the master equation and derive the longitudinal structure function as a function of the initial condition at small x . Our results are independent of the longitudinal coefficient functions and extend from the leading order (LO) up to next-to-next-to-leading order (NNLO). The comparisons with H1 data and other parameterizations are made and results show that they are in agreement with H1 data and some phenomenological models.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2014