Ahmed, Taushif and Hasan, Syed Mehedi and Rapakoulias, Andreas (2025) Phase-space integrals through Mellin-Barnes representation. PHYSICAL REVIEW D, 112 (5): L051903. ISSN 2470-0010, 2470-0029
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This letter introduces a novel analytical approach to calculating phase-space integrals, crucial for precision in particle physics. We develop a method to compute angular components using multifold Mellin-Barnes integrals, yielding results in terms of Goncharov polylogarithms for integrals involving three denominators. Our results include expressions for massless momenta to O & eth;e2 & THORN; and for massive momentum to O & eth;e & THORN;. We derive recursion relations that reduce integrals with higher powers of denominators to simpler ones. We detail how to combine the angular part with the radial one which requires a careful handling of singularities.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NUMERICAL EVALUATION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Jun 2026 06:50 |
| Last Modified: | 23 Jun 2026 06:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/65995 |
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