| Article | |
| Report number | arXiv:1911.09314 ; CERN-TH-2019-195 ; MPP-2019-236 ; PSI-PR-19-24 ; ZU-TH 48/19 |
| Title | Photon pair production in gluon fusion: Top quark effects at NLO with threshold matching |
| Author(s) | Chen, Long (Munich, Max Planck Inst.) ; Heinrich, Gudrun (Munich, Max Planck Inst.) ; Jahn, Stephan (Munich, Max Planck Inst.) ; Jones, Stephen P. (CERN) ; Kerner, Matthias (Zurich U.) ; Schlenk, Johannes (PSI, Villigen) ; Yokoya, Hiroshi (Korea Inst. Advanced Study, Seoul) |
| Publication | 2020-04-20 |
| Imprint | 2019-11-21 |
| Number of pages | 26 |
| Note | Version 2: figure 6 added; version published in JHEP |
| In: | JHEP 2004 (2020) 115 |
| DOI | 10.1007/JHEP04(2020)115 |
| Subject category | hep-ph ; Particle Physics - Phenomenology |
| Abstract | We present a calculation of the NLO QCD corrections to the loop-induced production of a photon pair through gluon fusion, including massive top quarks at two loops, where the two-loop integrals are calculated numerically. Matching the fixed-order NLO results to a threshold expansion, we obtain accurate results around the top quark pair production threshold. We analyse how the top quark threshold corrections affect distributions of the photon pair invariant mass and comment on the possibility of determining the top quark mass from precision measurements of the diphoton invariant mass spectrum. |
| Copyright/License | publication: © 2020-2024 The Authors (License: CC-BY-4.0) preprint: (License: arXiv nonexclusive-distrib 1.0) |
Corresponding record in: Inspire
Record created 2019-11-23, last modified 2022-08-20
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