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We present {\tt SKMHS22}, a new set of diffractive parton distributionfunctions (PDFs) and their uncertainties at next-to-leading-order accuracy inperturbative QCD within the {\tt xFitter} framework. We describe all availablediffractive DIS data sets from HERA and the most recent high-precision H1/ZEUScombined measurements considering three different scenarios. First, we extractthe diffractive PDFs considering the standard twist-2 contribution. Then, weinclude the twist-4 correction from the longitudinal virtual photons. Finally,the contribution of subleading Reggeon exchange to the structure-function$F_2^D$ is also examined. For the contribution of heavy flavors, we utilize theThorne-Roberts general mass variable number scheme. We show that for thosecorrections, in particular, the twist-4 contribution allows to include thehigh-$\beta$ region and leads to a better description of the diffractive DISdata sets. We find that the inclusion of the subleading Reggeon exchangesignificantly improves the description of the diffractive DIS cross-sectionmeasurements. The resulting sets are in good agreement with all diffractive DISdata analyzed, which cover a wider kinematical range than in previous fits. The{\tt SKMHS22} diffractive PDFs sets presented in this work are available viathe {\tt LHAPDF} interface. We also make suggestions for future research inthis area.

A global QCD analysis of diffractive parton distribution function considering higher twist corrections within the xFitter framework