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Effective QCD coupling and power corrections to photon-photon scattering

Abstract:
The scattering of two off-shell photons is an infrared-safe process in QCD. For photon virtualities Q in the range of a few GeV, accessible at the CERN e+e- collider LEP II, power-behaved contributions in (ΛQCD/Q)n to the total cross section may become non-negligible. Based on a dispersion relation for the running coupling, we discuss these contributions and calculate the coefficients of the leading power correction for transversely polarized and longitudinally polarized virtual photons.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevLett.80.3198

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
Journal:
Physical Review Letters More from this journal
Volume:
80
Issue:
15
Pages:
3198-3201
Publication date:
1998-04-13
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Pubs id:
pubs:22328
UUID:
uuid:91181ede-3a4f-4201-9581-1a0fca31775d
Local pid:
pubs:22328
Source identifiers:
22328
Deposit date:
2012-12-19

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