Results 131 to 140 of about 36,165 (249)

What can be measured asymptotically?

open access: yesJournal of High Energy Physics
We consider asymptotic observables in quantum field theories in which the S-matrix makes sense. We argue that in addition to scattering amplitudes, a whole compendium of inclusive observables exists where the time-ordering is relaxed.
Simon Caron-Huot   +3 more
doaj   +1 more source

Effects of nonperturbatively improved dynamical fermions in QCD at fixed lattice spacing [PDF]

open access: green, 2002
Chris Allton   +18 more
openalex   +1 more source

Nonperturbative region of effective strong coupling

open access: yes, 2013
In the framework of Poincar covariant quark model the behavior of running coupling constant $ _{s}\left(Q^{2}\right)$ is considered in $Q < 1 \mbox{GeV}$ region. An analysis was carried out for pseudoscalar and vector mesons with lepton decay constants, masses (obtained from model dependent) and nucleon spin rules required to match their ...
openaire   +2 more sources

Precocious scaling and nonperturbative effects in QCD

open access: yesZeitschrift für Physik C Particles and Fields, 1983
The onset of nonperturbative effects in QCD is studied in two ways: (1) by means of the nonvanishing vacuum expectation value of 〈g2F2〉 introduced by Shifman, Vainshtein and Zakharov; (2) using a finite energy sum rule (FESR) for the renormalization group function β.
openaire   +2 more sources

Nonperturbative Vacuum-Polarization Effects in Proton-Laser Collisions [PDF]

open access: green, 2008
A. Di Piazza   +2 more
openalex   +1 more source

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