Results 31 to 40 of about 115,526 (231)

Quantum simulation of colour in perturbative quantum chromodynamics

SciPost Physics, 2023
Quantum computers are expected to give major speed-ups for the simulation of quantum systems. In this work, we present quantum gates that simulate the colour part of the interactions of quarks and gluons in perturbative quantum chromodynamics (QCD). As a
Herschel A. Chawdhry, Mathieu Pellen
doaj   +1 more source

Scalar coupling evolution in a non-perturbative QCD resummation scheme

Physics Letters B, 2015
We compute the Standard Model scalar coupling (λ) evolution in a particular QCD resummation scheme, where the QCD coupling becomes infrared finite due to the presence of a dynamically generated gluon mass, leading to the existence of a non-perturbative ...
J.D. Gomez, A.A. Natale
doaj   +1 more source

Perturbative QCD

AIP Conference Proceedings, 1982
The discussion includes general properties of QCD perturbation expansion, onia decays, Drell-Yan, higher twist, and some miscellaneous comments about .cap alpha./sub s/. 45 references. (GHT)
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The transition to perturbative QCD in Compton scattering [PDF]

Nuclear Physics B, 1995
We investigate the transition to perturbative QCD in Compton processes, by concentrating on the specific reactions $πγ\to πγ$ and pion photoproduction at moderate energy scales. New sum rules for each of the helicities involved in the scattering and the cross section are given, together with a detailed stability analysis.
CORIANO', Claudio, H. N. LI
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The Curious Concept That Almost Nobody Seemed to Care About at First: Virtual Particles in the Post-War Period. [PDF]

Ber Wiss
Abstract Short‐lived, unobservable, and not subject to the usual rules of conservation of energy and momentum, virtual particles—an integral part of the conceptual framework of quantum field theory (QFT)—exhibit a number of curious characteristics which, in recent decades, have in part fueled important discussions about their ontological status ...
Martinez JP.
europepmc   +2 more sources

BASICS OF QCD PERTURBATION THEORY [PDF]

Flavor Physics for the Millennium, 2001
Lectures at the SLAC Summer Institute, August 1996.
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Effective locality and gauge invariance

EPJ Web of Conferences, 2018
A few years ago, based on standard functional manipulations, an unexpected property was proven to be satisfied by the fermionic Green's functions of QCD, and dubbed effective locality.
Grandou T.
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m‾c and m‾b from MBc and improved estimates of fBc and fBc(2S)

Physics Letters B, 2020
We extract (for the first time) the correlated values of the running masses m‾c and m‾b from MBc using QCD Laplace sum rules (LSR) within stability criteria where perturbative (PT) expressions at N2LO and non-perturbative (NP) gluon condensates at LO are
Stephan Narison
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Perturbative QCD and tau decay [PDF]

Nuclear Physics B - Proceedings Supplements, 1997
Sufficiently inclusive observables in the decay of the tau lepton can be calculated using the methods of perturbative QCD. These include the asymmetry parameter $A_τ$ that determines that angular distribution of the total hadron momentum in the decay of a polarized tau.
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MS renormalization of S-wave quarkonium wavefunctions at the origin

Journal of High Energy Physics, 2020
We compute S-wave quarkonium wavefunctions at the origin in the MS ¯ $$ \overline{\mathrm{MS}} $$ scheme based on nonrelativistic effective field theories.
Hee Sok Chung
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