380 citations · 2.6k across the 65 of their papers we have counts for
65 papers · 1 filter
Rings and strings: a basis for understanding subleading colour and QCD coherence beyond the two-jet limit
Jeffrey R. Forshaw, Jack Holguin, Simon Plätzer
Guided by the colour-diagonal structure of collinear singularities, we identify a set of kinematic basis functions that are well suited to the simplification of soft gluon emission…
Coulomb gluons will generally destroy coherence
Jeffrey R. Forshaw, Jack Holguin
Coherence violation is an interesting and counter-intuitive phenomenon in QCD. We discuss the circumstances under which violation occurs in observables sensitive to soft radiation…
Ordering multiple soft gluon emissions using Glauber-SCET
Jeffrey Robert Forshaw, Jack Holguin, Aditya Pathak
In QCD, the amplitude for multiple soft gluon emissions has been shown to exhibit a form of coherence, wherein one-loop corrections are rendered IR finite by the transverse momentu…
Improvements on dipole shower colour
Jack Holguin, Jeffrey R. Forshaw, Simon Plätzer
The dipole formalism provides a powerful framework from which parton showers can be constructed. In a recent paper, we proposed a dipole shower with improved colour accuracy and in…
Resummation and simulation of soft gluon effects beyond leading colour
Matthew De Angelis, Jeffrey R. Forshaw, Simon Plätzer
We present first results of resumming soft gluon effects in a simulation of high energy collisions beyond the leading-colour approximation. We work to all orders in QCD perturbatio…
Comments on a new `full colour' parton shower
Jack Holguin, Jeffrey R. Forshaw, Simon Plätzer
A new parton shower algorithm has been presented with the claim of providing soft-gluon resummation at `full colour' (arXiv:2001.11492). In this paper we show that the algorithm do…
Building a consistent parton shower
Jeffrey R. Forshaw, Jack Holguin, Simon Plätzer
Modern parton showers are built using one of two models: dipole showers or angular ordered showers. Both have distinct strengths and weaknesses. Dipole showers correctly account fo…
Parton branching at amplitude level
Jeffrey R. Forshaw, Jack Holguin, Simon Plätzer
We present an algorithm that evolves hard processes at the amplitude level by dressing them iteratively with (massless) quarks and gluons. The algorithm interleaves collinear emiss…
Soft gluon evolution and non-global logarithms
René Ángeles Martínez, Matthew De Angelis, Jeffrey R. Forshaw +2
We consider soft-gluon evolution at the amplitude level. Our evolution includes Coulomb exchanges and applies to generic hard-scattering processes involving any number of coloured…
Ordering multiple soft gluon emissions
René Ángeles-Martínez, Jeffrey R. Forshaw, Michael H. Seymour
We present an expression for the QCD amplitude for a general hard scattering process with any number of soft gluon emissions, to one-loop accuracy. The amplitude is written in two…
Coulomb gluons and the ordering variable
René Ángeles-Martínez, Jeffrey R. Forshaw, Michael H. Seymour
We study in detail the exchange of a Coulomb (Glauber) gluon in the first few orders of QCD perturbation theory in order to shed light on their accounting to all orders. We find an…
Diffractive vector meson production at HERA using holographic AdS/QCD wavefunctions
Jeff Forshaw, Ruben Sandapen
We demonstrate another success of the AdS/QCD correspondence by showing that an AdS/QCD holographic light-front wavefunction for the meson generates predictions for the cross-s…
Diffractive rho production with an AdS/QCD holographic wavefunction for the rho meson
J. R. Forshaw, R. Sandapen
We report on the results of our recent research published in [1] that shows that AdS/QCD generates predictions for the rate of diffractive ρ-meson electroproduction that are in agr…
An AdS/QCD holographic wavefunction for the rho meson
J. R. Forshaw, R. Sandapen
We use an AdS/QCD holographic wavefunction to generate predictions for the rate of diffractive ρ-meson electroproduction that are in reasonable agreement with data collected at the…
On the breaking of collinear factorization in QCD
Jeffrey R. Forshaw, Michael H. Seymour, Andrzej Siodmok
We investigate the breakdown of collinear factorization for non-inclusive observables in hadron-hadron collisions. For pure QCD processes, factorization is violated at the three-lo…
An AdS/QCD holographic wavefunction for the rho meson and diffractive rho meson electroproduction
J. R. Forshaw, R. Sandapen
We show that AdS/QCD generates predictions for the rate of diffractive rho meson electroproduction that are in agreement with data collected at the HERA electron-proton collider.
Phenomenology of Distribution Amplitudes for the rho meson
J. R. Forshaw, R. Sandapen
We report on a successful extraction of the twist-2 and twist-3 Distribution Amplitudes (DAs) of the rho meson using the HERA data on diffractive rho photoproduction. We extract th…
The dijet cross section with a jet veto
Rosa Maria Duran Delgado, Jeffrey R. Forshaw, Simone Marzani +1
We study dijet production in proton-proton collisions with a veto on the emission of a third jet in the rapidity region in between the two leading ones. We resum the leading logari…
Extracting the Distribution Amplitudes of the rho meson from the Color Glass Condensate
J. R. Forshaw, R. Sandapen
We extract the leading twist-2 and subleading twist-3 Distribution Amplitudes (DAs) of the rho meson using the HERA data on diffractive rho photoproduction. We do so using several…
Constraining the rho meson wavefunction
J. R. Forshaw, R. Sandapen
Diffractive rho meson production has been identified as one of the important processes where saturation can be probed at a future Electron-Ion Collider (EIC). A source of uncertain…
Extracting the rho meson wavefunction from HERA data
J. R. Forshaw, R. Sandapen
We extract the light-cone wavefunctions of the rho meson using the HERA data on diffractive rho photoproduction. We find good agreement with predictions for the distribution amplit…
Probing the theoretical description of central exclusive production
Tim Coughlin, Jeffrey Forshaw
We investigate the theoretical description of the central exclusive production process, . Taking Higgs production as an example, we compute the subset of n…
Central Exclusive Particle Production at High Energy Hadron Colliders
M. G. Albrow, T. D. Coughlin, J. R. Forshaw
We review the subject of central exclusive particle production at high energy hadron colliders. In particular we consider reactions of the type A + B -> A + X + B, where X is a ful…
Extracting Higgs boson couplings using a jet veto
Brian Cox, Andrew Pilkington, Jeff Forshaw
We show that the Higgs boson's effective couplings to gluons and to weak vector bosons can be extracted simultaneously from an analysis of Higgs plus dijet events by studying the d…