Article (Scientific journals)
A model for the pion structure function
Bissey, F.; Cudell, Jean-René; Cugnon, Joseph et al.
2002In Physics Letters B, 547 (3-4), p. 210-218
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Keywords :
pion structure function; gauge invariance; non-perturbative effects
Abstract :
[en] The pion structure function is investigated in a simple model, where pion and constituent quark fields are coupled through the simplest pseudoscalar coupling. The imaginary part of the forward gamma*pi --> gamma*pi evaluated and related to the structure functions. It is shown that the introduction of non-perturbative effects linked to the size of the pion and preserving gauge invariance, allows a connection with the quark distribution. It is predicted that higher-twist terms become negligible for Q(2) larger than similar to 2 GeV2 and that quarks in the pion have a momentum fraction smaller than in the proton case. (C) 2002 Elsevier Science B.V. All rights reserved.
Disciplines :
Physics
Author, co-author :
Bissey, F.
Cudell, Jean-René  ;  Université de Liège - ULiège > Département d'astrophys.
Cugnon, Joseph ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique
Jaminon, Martine ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Lansberg, Jean-Philippe ;  Université de Liège - ULiège > Département d'astrophys.
Stassart, Pierre ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Interactions fondamentales en physique et astrophysique
Language :
English
Title :
A model for the pion structure function
Publication date :
07 November 2002
Journal title :
Physics Letters B
ISSN :
0370-2693
eISSN :
1873-2445
Publisher :
Elsevier Science Bv, Amsterdam, Netherlands
Volume :
547
Issue :
3-4
Pages :
210-218
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 06 January 2009

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