“School of Particles”
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| Paper IPM / Particles / 17033 |
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We present {\tt SKMHS22}, a new set of diffractive parton distribution functions (PDFs) and their uncertainties at next-to-leading-order accuracy in perturbative QCD within the {\tt xFitter} framework.
We describe all available diffractive DIS data sets from HERA and the most recent high-precision H1/ZEUS combined measurements considering three different scenarios.
First, we extract the diffractive PDFs considering the standard twist-2 contribution.
Then, we include the twist-4 correction from the ongitudinal 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 the Thorne-Roberts general mass variable number scheme.
We show that for those corrections, in particular, the twist-4 contribution allows to include the high-$\beta$ region and leads to a better description of the
diffractive DIS data sets.
We find that the inclusion of the subleading Reggeon exchange significantly improves the description of the diffractive DIS cross-section measurements.
The resulting sets are in good agreement with all diffractive DIS data analyzed, which cover a wider kinematical range than in previous fits. The {\tt SKMHS22}
diffractive PDFs sets presented in this work are available
via the {\tt LHAPDF} interface.
We also make suggestions for future research in this area.
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