Estimate of the single diffractive heavy quark production in heavy ion collisions at the CERN LHC

Abstract

The single diffractive cross section for heavy quarks production is calculated in next-no-leading order (NLO) for nucleus-nucleus collisions. Such processes are expected to occur at the LHC, where the nuclei involved are lead at √ s = 5.5 TeV and calcium at √ s = 6.3 TeV. We start using the hard diffractive factorization formalism, taking into account a recent experimental parameterization for the Pomeron Structure Function (DPDF). Absorptive corrections are accounted by the multiple Pomeron contributions considering a gap survival probability, where its theoretical uncertainty for nuclear collisions is discussed. We estimate the diffractive ratios for single diffraction process in nuclear coherent/incoherent collisions at the LHC.

Charm and bottom production in inclusive double Pomeron exchange in heavy-ion collisions at energies available at the CERN Large Hadron Collider

“…Notice that the current study is complementary to our previous investigations on single diffractive production of charm and bottom presented in Ref. [2]. Incoherent diffractive scattering is also possible, where one or both nuclei will be excited, which subsequently decays into a system of colorless protons, neutrons, and nuclei debris.…”

“…The nuclear effect is proportional to A 1/3 , which enhances by one order of magnitude the cross section compared to the nucleon case. The incoherent case is not addressed here, but a procedure to its estimation has been presented in our previous study on single diffractive quark pair production [2]. As the nuclear shadowing correction is an important theoretical uncertainty in the current work, it is timely to compare the predictions with different models.…”

Diffractive dissociation of gluons into heavy quark–antiquark pairs in proton–proton collisions

“…Funded by SCOAP 3 . Diffractive production of heavy quarks was previously discussed within the Ingelman-Schlein model in Refs. [6][7][8][9] and proposed as a probe of the hard substructure of the Pomeron.…”

Photon and Pomeron-induced Production of Dijets in pp, pA and AA Collisions

“…An usual approach in the literature is the calculation of an average probability |S| 2 and thereafter to multiply the cross section by this value. As previous studies for the double diffractive production [12,16,21,[48][49][50][51][52][53] we also follow this simplified approach assuming |S| 2 = 0.02 for the dijet production by IP IP interactions in pp collisions. It is important to emphasize that this choice is somewhat arbitrary, and mainly motivated by the possibility to compare our predictions with those [45] indicate that this factor can be larger than this value by a factor ≈ 4.…”

“…6 we present our predictions for its energy dependence considering A A and p A collisions and different nuclei. It is important to emphasize that our prediction for pp collisions at the LHC energy is ≈ 0.02, as used in several phenomenological analyses in the literature [12,16,21,[48][49][50][51][52][53].…”