The EMC ratios of ${}^{4}He$, ${}^{3}He$ and ${}^{3}H$ nuclei in the $k_t$ factorization framework using the Kimber-Martin-Ryskin unintegrated parton distribution functions

Abstract

The unintegrated parton distribution functions (UPDFs) of ${}^{3}H$, ${}^{3}He$ and ${}^{4}He$ nuclei are generated to calculate their structure functions (SFs) in the $k_t$-factorization approach. The Kimber-Martin-Ryskin (KMR) formalisn is applied to evaluate the double-scale UPDFs of these nuclei from their single-scale parton distribution functions (PDFs), which can be obtained from the constituent quark exchange model (CQEM). Afterwards, these SFs are used to calculate the European Muon Collaboration (EMC) ratios of these nuclei. The resulting EMC ratios are then compared with the available experimental data and good agreement with data is achieved. In comparison with our previous EMC ratios, in which the conventional PDFs were used in the calculations, the accord of the present outcomes with experiment at the small $x$ region becomes impressive. Therefore, it can be concluded that the $k_t$ dependence of partons can reproduce the general form of the shadowing effect at the small $x$ values in above nuclei.

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• A detail study of the LHC and TEVATRON hadron-hadron prompt-photon pair production experiments in the angular ordering constraint k_t-factorization approaches
• Exclusive dilepton production via timelike Compton scattering in heavy ion collisions
• A phenomenological investigation of the integral and the differential versions of the Kimber-Martin$-Ryskin$unintegrated$ parton distribution functions using two different constraints and the MMHT2014 PDF
• Application of the constituent quark exchange model to the parton distributions and the EMC ratios of ${}^{12}C$ and ${}^{14}N$ nuclei
• Exclusive $Z^0$ production in $ep$ and $eA$ collisions at high energies