Lattice calculation of 1/p2 corrections to αs and of Λ(QCD) in the MOM-tilde scheme | Zendy

P. Boucaud | Zendy; Giuseppe Burgio | Zendy; Francesco Di Renzo | Zendy; Jean Pierre Leroy | Zendy; Jacques Micheli | Zendy; C. Parrinello | Zendy; O. Pène | Zendy; C. Pittori | Zendy; J. Rodríguez–Quintero | Zendy; C. Roiesnel | Zendy; Kieran J. Sharkey | Zendy

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Lattice calculation of 1/p² corrections to α_s and of Λ_(QCD) in the MOM-tilde scheme

Author(s) -

P. Boucaud,

Giuseppe Burgio,

Francesco Di Renzo,

Jean Pierre Leroy,

Jacques Micheli,

C. Parrinello,

O. Pène,

C. Pittori,

J. Rodríguez–Quintero,

C. Roiesnel,

Kieran J. Sharkey

Publication year - 2000

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2000/04/006

Subject(s) - physics , lambda , lattice qcd , quantum chromodynamics , perturbative qcd , lattice (music) , particle physics , gluon , omega , coupling constant , vertex (graph theory) , lattice field theory , combinatorics , quantum mechanics , mathematics , graph , acoustics

We report on very strong evidence of the occurrence of power terms in$\as(p)$, the QCD running coupling constant in the $\widetilde{MOM}$ scheme, byanalyzing non-perturbative measurements from the lattice three-gluon vertexbetween 2.0 and 10.0 GeV at zero flavor. While putting forward the caveat thatthis definition of the coupling is a gauge dependent one, the general relevanceof such an occurrence is discussed. We fit $\Lambda_{\bar{\rm MS}}^{(n_f=0)}=237 \pm 3 ^{+ 0}_{-10}$ MeV in perfect agreement with the result obtained bythe ALPHA group with a totally different method. The power correction to $\as(p)$ is fitted to $(0.63\pm 0.03 ^{+ 0.0}_{-0.13}) {\rm GeV}^2/p^2$.Comment: 21 pages, 3 figure

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