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19 papers · 2 filters
Measurements of the Delta(1232) Transition Form Factor and the Ratio sigma_nσ_p From Inelastic Electron-Proton and Electron-Deuteron Scattering
L. M. Stuart
Measurements of inclusive electron-scattering cross sections using hydrogen and deuterium targets in the region of the Delta(1232) resonance are reported. A global fit to these new…
Why Padé Approximants reduce the Renormalization-Scale dependence in QFT?
Einan Gardi
We prove that in the limit where the beta function is dominated by the 1-loop contribution (``large beta_0 limit'') diagonal Padé Approximants (PA's) of perturbative series become…
A Prediction for the 4-Loop βFunction
John Ellis, Marek Karliner, Mark. A. Samuel
We predict that the four-loop contribution β_3 to the QCD βfunction in the MS-bar prescription is given by β_3\simeq 23,600(900) - 6,400(200) N_f + 350(70) N_f^2 + 1.5 N_f^3, where…
The Rule in the Light of Two-Dimensional QCD
John Ellis, Yitzhak Frishman, Amihay Hanany +1
We calculate in QCD the ratios of baryonic matrix elements of and four-fermion operators, with a view to understanding better the mechanism of enha…
Factorization for hard exclusive electroproduction of mesons in QCD
John C. Collins, Leonid Frankfurt, Mark Strikman
We formulate and prove a QCD factorization theorem for hard exclusive electroproduction of mesons in QCD. The proof is valid for the leading power in Q and all logarithms. This gen…
Can Long Range Anomalous Neutrino Interactions Account for the Measured Tritium Beta Decay Spectrum ?
Rabindra N. Mohapatra, Shmuel Nussinov
Recent experimental searches for neutrino mass in tritium beta decay yield a negative value for the mass-squared of the electron neutrino. If this effect is genuine, then it is har…