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40 papers · 1 filter
Infrared Renormalons and Finite Volume
F. DiRenzo, G. Marchesini, E. Onofri
We analyze the perturbative expansion of a condensate in the O(N) non-linear sigma model for large N on a two dimensional finite lattice. On an infinite volume this expansion is af…
Determination of the Longitudinal Proton Structure Function F_L(x,Q^2) at Low x
C. Adloff
A measurement of the inclusive cross section for the deep-inelastic scattering of positrons off protons at HERA is presented at momentum transfers and…
Hybrid mesons from quenched QCD
P. Lacock, C. Michael, P. Boyle +1
We use lattice methods to evaluate from first principles the spectrum of hybrid mesons produced by gluonic excitations in quenched QCD with quark masses near the strange quark mass…
Measurement of Charged Particle Transverse Momentum Spectra in Deep Inelastic Scattering
C. Adloff, H1 Collaboration
Transverse momentum spectra of charged particles produced in deep inelastic scattering are measured as a function of the kinematic variables x_B and Q2 using the H1 detector at the…
The Quasi-Infra-Red Fixed Point at Higher Loops
P. M. Ferreira, I. Jack, D. R. T. Jones
We calculate the four-loop -function for the generalised Wess-Zumino model. We use the result and Padé-Borel summation to discuss the domain of attraction of the quasi-infra-red…
Progress with large N_f beta-functions
J. A. Gracey
We report on the progress in the computation of the beta-functions of phi^4 theory and QCD in the large N expansion. For the former we give an analytic formula for the critical exp…