Article (Scientific journals)
Enhancement effects in exclusive ππ and ρπ production in γ* γ scattering
Courtoy, Aurore; Noguera, S.
2009In Physics Letters B, 675 (1), p. 38-42
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Abstract :
[en] The exclusive ππ and ρπ production in hard γ* γ scattering in the forward kinematical region where the virtual photon is highly off-shell is studied using the γ → π- Transition Distribution Amplitudes obtained in realistic models for the pion. For ρπ production we confirm the previous estimates before QCD evolution. Nevertheless, once evolution is taken into account this cross section grows one order of magnitude. In the case of ππ production we have evaluated the cross section including the pion pole contribution. We observe that this contribution is responsible for an enhancement of two orders of magnitude with respect to the cross section evaluated without the pion pole term. © 2009 Elsevier B.V. All rights reserved.
Disciplines :
Physics
Author, co-author :
Courtoy, Aurore ;  Departamento de Física Teórica, Instituto de Física Corpuscular, Universidad de Valencia-CSIC, E-46100 Burjassot, Valencia, Spain
Noguera, S.;  Departamento de Física Teórica, Instituto de Física Corpuscular, Universidad de Valencia-CSIC, E-46100 Burjassot, Valencia, Spain
Language :
English
Title :
Enhancement effects in exclusive ππ and ρπ production in γ* γ scattering
Publication date :
2009
Journal title :
Physics Letters B
ISSN :
0370-2693
eISSN :
1873-2445
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
675
Issue :
1
Pages :
38-42
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 July 2012

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