Dr Krishna Kumar Singh (Bits Pilani Dubai Campus (AE))
A thermodynamical bag model is used to calculate the nucleon structure function by treating the quarks and gluons as Fermi and Bose gases. It is found to agree well with the experimental data. In this article this model is used to calculate the longitudinal structure function which is related to the ratio of absorption cross section for longitudinally and transversely polarized virtual photons. This can then be campared with the corresponding experimental values and other models.