New 5 flavor next-to-leading-order analysis and parametrizations of parton distributions of the real photon
New 5 flavor next-to-leading-order analysis and parametrizations of parton distributions of the real photon
New, radiatively generated, next-to-leading (NLO) quark $(u,d,s,c,b)$ and gluon densities in a real, unpolarized photon are presented. We perform three global fits, based on the NLO Dokshitzer-Gribov-Lipatov-Altarelli-Parisi evolution equations for ${Q}^{2}>1\text{ }\text{ }{\mathrm{G}\mathrm{e}\mathrm{V}}^{2}$, to all the available structure-function ${F}_{2}^{\ensuremath{\gamma}}(x,{Q}^{2})$ data. As in our previous LO analysis we utilize two theoretical …