Abstract
We discuss diffractive production of heavy mesons at the LHC. In addition to standard collinear approach, for a first time we propose a k t -factorization approach to the diffractive processes. The unintegrated (transverse momentum dependent) diffractive parton distributions in proton are calculated with the help of the Kimber-Martin-Ryskin prescription where collinear diffractive PDFs are used as input. Some correlation observables, like azimuthal angle correlation between c and c , and cc pair transverse momentum distribution were obtained for the first time. The results of the new approach are compared with those of the standard collinear one. Significantly larger cross sections are obtained in the k t -factorization approach where some part of higher-order effects is effectively included.
Highlights
Diffractive hadronic processes were studied theoretically in the so-called resolved pomeron model [1]
Extension of the standard resolved pomeron model based on the LO collinear approach by adopting a framework of the kt-factorization is proposed as an effective way to include higher-order corrections
(right panel) distribution Distributions calculated of c quarks within the LO collinear factorization and for the kt-factorization approach are shown separately
Summary
Diffractive hadronic processes were studied theoretically in the so-called resolved pomeron model [1] This model, previously used to describe deep-inelastic diffractive processes must be corrected for absorption effects related to hadron-hadron interactions. In theoretical models this effect is taken into account approximately by multiplying the diffractive cross section calculated using HERA diffractive. LHC data for inclusive that application of the kt-factorization approach to diffractive charm production is useful. This presentation is based on our recent study presented in [6]. We present only results at the quark/antiquark level
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