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Titolo: Nonperturbative corrections to the DrellYan transverse momentum distribution
Autore: Tafat, S;
 Indirizzi:
 Univ Paris 11, Phys Theor Lab, CNRS, UMR 8627, F91405 Orsay, France Univ Paris 11 Orsay France F91405 CNRS, UMR 8627, F91405 Orsay, France
 Titolo Testata:
 JOURNAL OF HIGH ENERGY PHYSICS
fascicolo: 5,
volume: 2001,
anno: 2001,
pagine: NIL_84  NIL_108
 SICI:
 10298479(200105)2001:5<NIL_84:NCTTDT>2.0.ZU;2O
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 BOSON PRODUCTION; CROSSSECTIONS; LEADING ORDER; WILSON LOOPS; QCD; RESUMMATION; EXPONENTIATION; ASYMPTOTICS; NONLOCALITY; COLLIDERS;
 Keywords:
 nonperturbative effects; QCD; NLO computations; hadronic colliders;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Physical, Chemical & Earth Sciences
 Citazioni:
 43
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Tafat, S Univ Paris 11, Phys Theor Lab, CNRS, UMR 8627, Bat 425, F91405 Orsay, France Univ Paris 11 Bat 425 Orsay France F91405 F91405 Orsay, France



 Citazione:
 S. Tafat, "Nonperturbative corrections to the DrellYan transverse momentum distribution", J HIGH EN P, 2001(5), 2001, pp. NIL_84NIL_108
Abstract
We study nonperturbative corrections to the transverse momentum distribution of vector bosons in the DrellYan process. Factorizing out the Sudakov effects due to soft gluons we express their contribution to the distribution in the form of the vacuum averaged Wilson loop operator. We calculate thenonperturbative contribution to the Sudakov form factor using the expansion of the Wilson loop over vacuum fields supplemented with the expression for nonlocal gauge invariant field strength correlator. Although the Wilsonloop is defined in an essentially Minkowski kinematics, the part of the nonperturbative contribution depending on the invariant mass of the producedvector bosons is governed by asymptotics of the correlator at large spacelike (euclidean) separations and therefore can be calculated using conventional nonperturbative methods. Applying the results of lattice calculationswe found that the obtained expression for the nonperturbative power corrections is in qualitative agreement with known phenomenological expressions at large transverse momenta and deviate from them at small transverse momenta.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 15:19:23