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Titolo:
Preliminaries on a lattice analysis of the pion light-cone wave function: A partonic signal? art. no. 074511
Autore:
Abada, A; Boucaud, P; Herdoiza, G; Leroy, JP; Micheli, J; Pene, O; Rodriguez-Quintero, J;
Indirizzi:
Univ Paris 11, Phys Theor Lab, F-91405 Orsay, France Univ Paris 11 OrsayFrance F-91405 Phys Theor Lab, F-91405 Orsay, France Univ Huelva, EPS La Rabida, Dept Fis Aplicada & Ingn Elect, Palos De La Fra, Spain Univ Huelva Palos De La Fra Spain & Ingn Elect, Palos De La Fra, Spain
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 7, volume: 6407, anno: 2001,
pagine: 4511 -
SICI:
0556-2821(20011001)6407:7<4511:POALAO>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
FORM-FACTOR; DISTRIBUTION AMPLITUDE; TRANSVERSE-MOMENTUM; EXCLUSIVE PROCESSES; QCD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Abada, A Univ Paris 11, Phys Theor Lab, Batiment 211, F-91405 Orsay, France Univ Paris 11 Batiment 211 Orsay France F-91405 05 Orsay, France
Citazione:
A. Abada et al., "Preliminaries on a lattice analysis of the pion light-cone wave function: A partonic signal? art. no. 074511", PHYS REV D, 6407(7), 2001, pp. 4511

Abstract

We present the first attempt of new method to compute the pion li.-ht-conewave function (LCWF) on the lattice. We compute the matrix element betweenthe pion and the vacuum of a nonlocal operator: the propagator of a "scalar quark" (named, for short a "squark"). A theoretical analysis shows that for some kinematical conditions (an energetic pion and hard squark) this matrix element depends dominantly on the LCWF Phi (pi)(u),u is an element of [0,1]. On the lattice, the discretization of the par-ton momenta imposes further constraints on the pion momentum. The two-point Green functions made of squark-quark and squark-squark fields show a hadronlike bound-state behavior and verify the standard energy spectrum. We show some indications that during a short time, after being created, the system of the spectator quarkand the squark behave like partons, before they form a hadronlike bound state. This short time is the place where the partonic wave function has to be looked for.

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Documento generato il 06/04/20 alle ore 11:21:32