Enhanced production of events at large x and Q2 at HERA and the meson cloud in the nucleon

We examine to which degree the effect of the inclusion of target mass corrections in the description at low-Q² DIS and meson cloud effects may, after QCD evolution, modify DIS cross section at large x and Q². This is of interest in the context of recently reported excess of events observed by H1 and ZEUS collaborations at HERA. We predict an enhanced production of events at large-x in comparison to standard sets of quark distributions with rather mild Q²-dependence. Our analysis leaves some room for more exotic effects beyond parton approach and/or Standard Model. Our large-x effects can be verified in the future when the HERA luminosity will be increased.