Finite size effects on bag thermodynamics and quark-gluon deconfinement phase transition

We have investigated the effects of finite size corrections (surface and curvature) to the single particle density of states on various thermodynamic quantities of massless quarks and gluons confined in a spherical cavity. The chemical potential zero and non-zero both the cases are studied. Ignoring the surface term which seems much less important than the curvature term, the problem can be studied analytically in the case of zero chemical potential. We find a first order deconfinement phase transition contrary to the second order in absence of the curvature term. Furthermore, the values of the transition temperature, Ts in the infinite volume limit and the critical temperature Tc>Ts, beyond which hadrons cease to exist, are in conformity with our earlier studies. (orig.)