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Solution of polynomiality and positivity constraints on generalized parton distributions
| Content Provider | Semantic Scholar |
|---|---|
| Author | Pobylitsa, P. V. |
| Copyright Year | 2003 |
| Abstract | Generalized parton distributions (GPDs) [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] appear in the context of the QCD factorization in various hard exclusive phenomena including deeply virtual Compton scattering and hard exclusive meson production. Among several general constraints on GPDs an important role is played by the polynomiality of the Mellin moments [5] and by the positivity bounds [11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22]. These properties will be briefly described in section 2. In this paper we suggest a representation for GPDs which automatically satisfies both positivity and polynomiality constraints. For simplicity only the case of spin zero hadrons will be considered (but various types of partons will be covered). We use the following definition of GPDs which is not quite standard but allows us to study different cases with a universal formalism: |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv.org/pdf/hep-ph/0210150v2.pdf |
| Alternate Webpage(s) | http://cds.cern.ch/record/585926/files/0210150.pdf |
| Alternate Webpage(s) | http://arxiv.org/pdf/hep-ph/0210150v1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Arabic numeral 0 Familial generalized lipodystrophy Mesons Semantics (computer science) |
| Content Type | Text |
| Resource Type | Article |
