All Outputs (5)

Comments on Global Parton Analyses (2020)
Journal Article
Martin, A., & Ryskin, M. (2020). Comments on Global Parton Analyses. Acta Physica Polonica B, 51(5), 1079-1096. https://doi.org/10.5506/aphyspolb.51.1079

We discuss the causes which can limit the accuracy of the predictions based on the conventional PDFs when including in global parton analyses the data at moderate scales μ. The first is the existence of power corrections O(Q20/μ2) due to the double c... Read More about Comments on Global Parton Analyses.

Very low x gluon density determined by LHCb exclusive J/ψ data (2020)
Journal Article
Flett, C., Martin, A., Ryskin, M., & Teubner, T. (2020). Very low x gluon density determined by LHCb exclusive J/ψ data. Physical Review D, 102(11), Article 114021. https://doi.org/10.1103/physrevd.102.114021

The low x behavior of the gluon density x g ( x , μ 2 ) at scale μ 2 = 2.4     GeV 2 is determined using exclusive J / ψ production data from HERA and LHCb within the framework of collinear factorization at next-to-leading order (NLO). It is shown th... Read More about Very low x gluon density determined by LHCb exclusive J/ψ data.

How to include exclusive J/ψ production data in global PDF analyses (2020)
Journal Article
Flett, C., Jones, S., Martin, A., Ryskin, M., & Teubner, T. (2020). How to include exclusive J/ψ production data in global PDF analyses. Physical Review D, 101(9), Article 094011. https://doi.org/10.1103/physrevd.101.094011

We compare the cross section for exclusive J=ψ photoproduction calculated at next-to-leading order (NLO) in the collinear factorization approach with HERA and LHCb data. Using the optimum scale formalism together with the subtraction of the low kt co... Read More about How to include exclusive J/ψ production data in global PDF analyses.

Isolating the Odderon in central production in high energy pA and AA collisions (2020)
Journal Article
McNulty, R., Khoze, V., Martin, A., & Ryskin, M. (2020). Isolating the Odderon in central production in high energy pA and AA collisions. The European Physical Journal C, 80(3), Article 80. https://doi.org/10.1140/epjc/s10052-020-7846-5

We study the rapidity dependence of the central exclusive production cross sections of C-even mesons in pA and AA collisions, where A is a heavy ion. We observe qualitatively different behaviour of the contributions arising from γ-Odderon and Pomeron... Read More about Isolating the Odderon in central production in high energy pA and AA collisions.

Bethe phase including proton excitations (2020)
Journal Article
Khoze, V., Martin, A., & Ryskin, M. (2020). Bethe phase including proton excitations. Physical Review D, 101(1), Article 016018. https://doi.org/10.1103/physrevd.101.016018

We evaluate the contribution of inelastic intermediate states (such as p → N excitations) to the phase between the one-photon-exchange and the “nuclear” high energy pp scattering amplitudes as t → 0, caused by multiphoton diagrams. It turns out to be... Read More about Bethe phase including proton excitations.