STI Publications - View Publication Form #13226
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Publication Information
| Title | Virtuality Distributions and gamma gamma* -> pi0 Transition at Handbag Level | ||||
| Abstract | We outline basics of a new approach to transverse momentum dependence in hard processes. As an illustration, we consider hard exclusive transition process gamma* gamma -> pi0 at the handbag level. Our starting point is coordinate representation for matrix elements of operators (in the simplest case, bilocal O(0,z)) describing a hadronwith momentum p. Treated as functions of (pz) and $z^2, they are parametrized through virtuality distribution amplitudes (VDA) Phi (x, sigma), with x being Fourier-conjugate to (pz) and sigma Laplace-conjugate to z^2. For intervals with $z^+=0$, we introduce the transverse momentum distribution amplitude (TMDA) $\Psi (x, k_\perp)$, and write it in terms of VDA $\Phi (x, \sigma)$. The results of covariant calculations, written in terms of $\Phi (x, \sigma)$ are converted into expressions involving $\Psi (x,k_\perp)$. We propose simple models for soft VDAs/TMDAs, and use them for comparis | ||||
| Author(s) | Anatoly Radyushkin | ||||
| Publication Date | September 2015 | ||||
| Document Type | Meeting, Proceedings | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | |||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Meeting / Conference
| Meeting Name | Light Cone 2014 |
| Meeting Date | 5/26/2014 |
| Document Subtype | Invited Talk (slides) |
Proceedings
| Title | Proceedings of Light Cone 2014 (Few-Body Systems 56 (6-9) 2015) |
| Editor(s) | Chueng-Ryong Ji |
| Publisher | Springer |
| Refereed | Yes |
| Page Number | 287-293 |
| Year | 2015 |
Attachments/Datasets/DOI Link
| Document(s) |
Radyushkin_LC2014.pdf
(STI Document)
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| DOI Link | |
| Dataset(s) | (none) |
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