416 citations · 2k across the 45 of their papers we have counts for
45 papers
Low- parton densities accounting for absorptive effects and exclusive and data from the LHC
V. Bertone, C. A. Flett, A. D. Martin +1
Based on the combined Deep-Inelastic Scattering (DIS) data from HERA and the exclusive and cross sections measured at the LHC, we investigate the role of absorptive corre…
A method to include exclusive heavy vector-meson production data at small in global parton analyses
C. A. Flett, A. D. Martin, M. G. Ryskin +1
We propose a method which allows the inclusion of exclusive heavy vector-meson production data at low in future global parton analyses. As an example we perform a study within…
Oscillations in the elastic high energy amplitude
P. Grafstrom, A. D. Martin, M. G. Ryskin
We discuss the oscillations in the elastic differential cross section seen in the TOTEM data at ~TeV on the top of the usual smooth behaviour.
Elastic and diffractive scattering at the LHC
V. A. Khoze, A. D. Martin, M. G. Ryskin
Inspired by the new TOTEM data on elastic scattering at 13 TeV, we study the possibility to describe all the diffractive collider data (, $ρ\equiv…
Open charm production and low x gluons
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We compare the rapidity, , and the beam energy, , behaviours of the cross section of the data for meson production in the forward direction that were measured by t…
Can invisible objects be `seen' via forward proton detectors at the LHC?
V. A. Khoze, A. D. Martin, M. G. Ryskin
We discuss the possibility of identifying invisible objects (e.g. dark matter) via missing mass in Central Exclusive Processes; that is, in events where only forward protons are de…
The exclusive process at the LHC tamed to probe the low gluon
S. P. Jones, A. D. Martin, M. G. Ryskin +1
The perturbative QCD expansion for photoproduction appears to be unstable: the NLO correction is large (and of opposite sign) to the LO contribution. Moreover, the prediction…
LHC Forward Physics
K. Akiba, M. Akbiyik, M. Albrow +184
The goal of this report is to give a comprehensive overview of the rich field of forward physics, with a special attention to the topics that can be studied at the LHC. The report…
Exclusive production at the LHC in the factorization approach
S. P. Jones, A. D. Martin, M. G. Ryskin +1
The recent LHCb data for exclusive peripheral production at 13 TeV motivate an improved `NLO' analysis to estimate the gluon distribution at low in which we re-calculate…
Partonic transverse momenta in soft collisions
V. A. Khoze, A. D. Martin, M. G. Ryskin
The partonic transverse momentum, k_t distribution plays a crucial role in driving high-energy hadron interactions. If k_t is limited we have old fashioned Regge Theory. If k_t inc…
The photon PDF of the proton
A. D. Martin, M. G. Ryskin
We show how the photon input parton distribution function (PDF) may be calculated with good accuracy, and used in an extended DGLAP global parton analysis in which the photon is tr…
BFKL equation for an integrated gluon density
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We show how it is possible to rewrite the BFKL equation for the unintegrated gluon distribution, in terms of integrated gluons, similar to that used in DGLAP. We add to our equatio…
Evolution in opening angle combining DGLAP and BFKL logarithms
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We present an evolution equation which simultaneously sums the leading BFKL and DGLAP logarithms for the integrated gluon distribution in terms of a single variable, namely the emi…
Elastic scattering and Diffractive dissociation in the light of LHC data
V. A. Khoze, A. D. Martin, M. G. Ryskin
We study the behaviour of elastic and diffractive proton dissociation cross sections at high energy. First, we describe what would be expected to be observed at the LHC based on co…
High Energy Elastic and Diffractive Cross Sections
V. A. Khoze, A. D. Martin, M. G. Ryskin
We present a `global' description of the wide variety of high energy elastic and diffractive data that are presently available, particularly from the LHC experiments. The model is…
Physical factorisation scheme for PDFs for non-inclusive applications
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We introduce the physical factorisation scheme, which is necessary to describe observables which are `not completely inclusive'. We derive the formulae for NLO DGLAP evolution in t…
Diffraction at the LHC
V. A. Khoze, A. D. Martin, M. G. Ryskin
We show that the diffractive pp (and p\bar{p}) data (on σ_tot, dσ_el/dt, proton dissociation into low-mass systems, σ^D(low M), and high-mass dissociation, dσ/d(Δη)) in a wide ener…
Unintegrated parton distributions in nuclei
E. G. de Oliveira, A. D. Martin, F. S. Navarra +1
We study how unintegrated parton distributions in nuclei can be calculated from the corresponding integrated partons using the EPS09 parametrization. The role of nuclear effects is…
Treatment of heavy quarks in QCD
E. G. de Oliveira, A. D. Martin, M. G. Ryskin +1
We show that to correctly describe the effects of the heavy-quark mass, m_h, in DGLAP evolution, it is necessary to work in the so-called `physical' scheme. In this way, we automat…
Treatment of the infrared contribution: NLO QED evolution as a pedagogic example
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We show that the conventional prescription used for DGLAP parton evolution at NLO has an inconsistent treatment of the contribution from the infrared (IR) region. We illustrate the…
Improving the Drell-Yan probe of small x partons at the LHC via a k_t cut
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We show that the observation of the Drell-Yan production of low-mass lepton-pairs (M < 20 GeV) at high rapidities (Y > 3) at the LHC can make a direct measurement of parton distrib…
The treatment of the infrared region in perturbative QCD
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
We discuss the contribution coming from the infrared region to NLO matrix elements and/or coefficient functions of hard QCD processes. Strictly speaking, this contribution is not k…
Drell-Yan as a probe of small x partons at the LHC
E. G. de Oliveira, A. D. Martin, M. G. Ryskin
The predictions of Drell-Yan production of low-mass, lepton-pairs, at high rapidity at the LHC, are known to depend sensitively on the choice of factorization and renormalization s…
Proton opacity in the light of LHC diffractive data
M. G. Ryskin, A. D. Martin, V. A. Khoze
We show that collider data on elastic pp (and p\bar{p}) scattering, including the LHC TOTEM data at 7 TeV, can be well described by a 3-channel eikonal model with only one Pomeron,…