Two-loop form factors for pseudo-scalar quarkonium production and decay
Abstract We present the analytic expressions for the two-loop form factors for the production or decay of pseudo-scalar quarkonia, in a scheme where the quarks are produced at threshold. We consider the two-loop amplitude for the process γγ ↔ S 0 1 1 $$ \gamma \gamma \leftrightarrow {}^1{S}_0^{\left...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-02-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP02(2023)250 |