References of "Cudell, Jean-René"
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See detailA simple model for generalised parton distributions of the pion
Lansberg, Jean-Philippe ULg; Bissey, F.; Cudell, Jean-René ULg et al

in Bruncko, D.; Ferencei, J.; Strizenec, P. (Eds.) 12th International Workshop On Deep Inelastic Scattering (DIS 2004) (2004)

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See detailSaturation and non-linear effects in diffractive processes
Selyugin, Oleg V; Cudell, Jean-René ULg

in Burdik, C. (Ed.) 11th International Conference On Symmetry Methods In Physics (SYMPHYS-11) (2004)

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See detailLarge-distance effects on spin observables at RHIC
Selyugin, Oleg V; Cudell, Jean-René ULg; Predazzi, E.

in Aulenbacher, K.; Bradamante, F.; Bressan, A. (Eds.) et al 16th International Spin Physics Symposium (SPIN 2004) (2004)

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See detailPion Structure Function and violation of the Momentum Sum Rule
Lansberg, Jean-Philippe ULg; Bissey, F.; Cudell, Jean-René ULg et al

in Blin, A. H.; Hiller, B.; Ruivo, M. C. (Eds.) et al Hadron Physics: Effective Theories of Low Energy QCD N°2 (2003)

We present a method to evaluate the pion structure functions from a box diagram calculation. Pion and constituent quark fields are coupled through the simplest pseudoscalar coupling. The gamma^* pi -> q ... [more ▼]

We present a method to evaluate the pion structure functions from a box diagram calculation. Pion and constituent quark fields are coupled through the simplest pseudoscalar coupling. The gamma^* pi -> q \bar q cross-section is evaluated and related to the structure functions. We then show that the introduction of non-perturbative effects, related to the pion size and preserving gauge invariance, provides us with a straighforward relation with the quark distribution. It is predicted that higher-twist terms become negligible for Q^2 larger than about 2 GeV^2 and that quarks in the pion have a momentum fraction smaller than in the proton. We enlarge the discussion concerning this violation of the momentum sum rule, emphasizing that the sum rule is recovered in the chiral limit and also when the finite size condition is not imposed. [less ▲]

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See detailConfinement and cut-off: A model for the Pion Quark Distribution Function
Stassart, Pierre ULg; Bissey, F.; Cudell, Jean-René ULg et al

(2003)

The pion structure function is investigated in a simple pseudo-scalar coupling model of pion and constituent quark fields. The imaginary part of the forward Compton scattering amplitude is evaluated. We ... [more ▼]

The pion structure function is investigated in a simple pseudo-scalar coupling model of pion and constituent quark fields. The imaginary part of the forward Compton scattering amplitude is evaluated. We show that the introduction of non-perturbative effects, linked through a cut-off to the size of the pion, allows the reproduction of important features of the pion quark distribution function. [less ▲]

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See detailIntegral and derivative dispersion relations in the analysis of the data on p p and anti-p p forward scattering
Cudell, Jean-René ULg; Martynov, E.; Selyugin, Oleg V

in Ukrainian Journal of Physics (2003), 48(Nos. 11- 12, 2003),

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See detailBenchmarks for the forward observables at RHIC, the Tevatron-run II, and the LHC
Cudell, Jean-René ULg; Ezhela, Vladimir V.; Gauron, P. et al

in Physical Review Letters (2002), 89(20), 201801

We present predictions on the total cross sections and on the ratio of the real part to the imaginary part of the elastic amplitude (rho parameter) for present and future pp and pbar p colliders, and on ... [more ▼]

We present predictions on the total cross sections and on the ratio of the real part to the imaginary part of the elastic amplitude (rho parameter) for present and future pp and pbar p colliders, and on total cross sections for gamma p -> hadrons at cosmic-ray energies and for gamma gamma-> hadrons up to sqrt{s}=1 TeV. These predictions are based on an extensive study of possible analytic parametrisations invoking the biggest hadronic dataset available at t=0. The uncertainties on total cross sections, including the systematic errors due to contradictory data points from FNAL, can reach 1.9% at RHIC, 3.1% at the Tevatron, and 4.8% at the LHC, whereas those on the rho parameter are respectively 5.4%, 5.2%, and 5.4%. [less ▲]

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See detailA model for the pion structure function
Bissey, F.; Cudell, Jean-René ULg; Cugnon, Joseph ULg et al

in Physics Letters B (2002), 547(3-4), 210-218

The pion structure function is investigated in a simple model, where pion and constituent quark fields are coupled through the simplest pseudoscalar coupling. The imaginary part of the forward gamma*pi ... [more ▼]

The pion structure function is investigated in a simple model, where pion and constituent quark fields are coupled through the simplest pseudoscalar coupling. The imaginary part of the forward gamma*pi --> gamma*pi evaluated and related to the structure functions. It is shown that the introduction of non-perturbative effects linked to the size of the pion and preserving gauge invariance, allows a connection with the quark distribution. It is predicted that higher-twist terms become negligible for Q(2) larger than similar to 2 GeV2 and that quarks in the pion have a momentum fraction smaller than in the proton case. (C) 2002 Elsevier Science B.V. All rights reserved. [less ▲]

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See detailHadronic scattering amplitudes: Medium-energy constraints on asymptotic behavior
Cudell, Jean-René ULg; Ezhela, Vladimir V.; Gauron, P. et al

in Physical Review. D (2002), 65(7),

We consider several classes of analytic parametrizations of hadronic scattering amplitudes, and compare their predictions to all available forward data (pp, (p) over barp, pip, Kp, gammap, gammagamma ... [more ▼]

We consider several classes of analytic parametrizations of hadronic scattering amplitudes, and compare their predictions to all available forward data (pp, (p) over barp, pip, Kp, gammap, gammagamma, Sigmap). Although these parametrizations are very close for rootsgreater than or equal to9 GeV, it turns out that they differ markedly at low energy, where a universal Pomeron term similar toln(2)s enables one to extend the fit down to roots=4 GeV. [less ▲]

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See detailErratum to: “Perturbative evolution and Regge behaviour”: [Phys. Lett. B 448 (1999) 281]
Cudell, Jean-René ULg; Donnachie, A.; Landshoff, P.

in Physics Letters B (2002), 528

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See detailForward observables at RHIC, the Tevatron Run II and the LHC
Cudell, Jean-René ULg; Ezhela, V. V.; Gauron, P. et al

in Fiore, R.; Jenkowszky, L. (Eds.) DIFFRACTION 2002, Interpretation of the New Diffractive Phenomena in Quantum Chromodynamics and in the S-Matrix Theory (2002)

We present predictions on the total cross sections and on the ratio of the real part to the imaginary part of the elastic amplitude (rho parameter) for present and future pp and pbar p colliders, and on ... [more ▼]

We present predictions on the total cross sections and on the ratio of the real part to the imaginary part of the elastic amplitude (rho parameter) for present and future pp and pbar p colliders, and on total cross sections for gamma p -> hadrons at cosmic-ray energies and for gamma gamma -> hadrons up to sqrt(s)=1 TeV. These predictions are based on a study of many possible analytic parametrisations and invoke the current hadronic dataset at t=0. The uncertainties on total cross sections, including the systematic theoretical errors, reach 1% at RHIC, 3% at the Tevatron, and 10% at the LHC, whereas those on the rho parameter are respectively 10%, 17%, and 26%. [less ▲]

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See detailThe Valence Quark Distribution of the Pion
Lansberg, Jean-Philippe ULg; Bissey, F.; Cudell, Jean-René ULg et al

in Dong Su; Burchat, Patricia (Eds.) XXII Physics in Collision Conference (PIC02) (2002)

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See detailA full-acceptance detector at the LHC (FELIX)
Ageev, A.; Akhobadze, K.; Alvero, L. et al

in Journal of Physics : G Nuclear & Particle Physics (2002), 28(6), 117-215

The FELIX collaboration had proposed the construction of a full-acceptance detector for the LHC. The primary mission of FELIX was the study of QCD: to provide comprehensive and definitive observations of ... [more ▼]

The FELIX collaboration had proposed the construction of a full-acceptance detector for the LHC. The primary mission of FELIX was the study of QCD: to provide comprehensive and definitive observations of a very broad range of strong-interaction processes. This document contains an extensive discussion of this physics menu. In a further paper the FELIX detector will be reviewed. [less ▲]

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See detailConsequences of t-channel unitarity for the interaction of real and virtual photons at high energies
Martynov, E.; Cudell, Jean-René ULg; Soyez, G.

in Jenkovsky, L.; Fiore, R. (Eds.) DIFFRACTION 2002: INTERPRETATION OF THE NEW DIFFRACTIVE PHENOMENA IN QUANTUM CHROMODYNAMICS AND IN THE S - MATRIX THEORY (2002)

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See detailAnalytic amplitudes for hadronic forward scattering: COMPETE update
Nicolescu, B.; Cudell, Jean-René ULg; Ezhela, V. V. et al

in Bentvelsen, S.; de Jong, P.; Koch, J. (Eds.) et al ICHEP 2002 (2002)

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See detailOverview of the COMPETE program. ((V))
Ezhela, V. V.; Cudell, Jean-René ULg; Gauron, P. et al

in Jenkovsky, L.; Fiore, R. (Eds.) DIFFRACTION 2002: INTERPRETATION OF THE NEW DIFFRACTIVE PHENOMENA IN QUANTUM CHROMODYNAMICS AND IN THE S - MATRIX THEORY (2002)

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See detailConsequences of t-channel unitarity for gamma(*) p and gamma(*) gamma(*) amplitudes
Cudell, Jean-René ULg; Martynov, E.; Soyez, G.

in Bentvelsen, S.; de Jong, P.; Koch, J. (Eds.) et al ICHEP 2002 (2002)

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See detailErratum: High-energy forward scattering and the Pomeron: Simple pole versus unitarized models [Phys. Rev. D 61, 034019 (2000)]
Cudell, Jean-René ULg; Ezhela, V.; Kang, K. et al

in Physical Review. D : Particles and Fields (2001), 63

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See detailNeutral Pion Structure Function
Cudell, Jean-René ULg; Cugnon, Joseph ULg; Jaminon, Martine ULg et al

Conference (2001)

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See detailDoes F2 need a hard pomeron?
Cudell, Jean-René ULg; Soyez, G.

in Physics Letters B (2001), 516

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