Abstract
We present the computation of the two-loop form factors for diphoton production in the quark annihilation channel. These quantities are relevant for the NNLO QCD corrections to diphoton production at LHC recently presented in [1]. The computation is performed retaining full dependence on the mass of the heavy quark in the loops. The master integrals are evaluated by means of differential equations which are solved exploiting the generalised power series technique.
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Acknowledgments
This work is supported by the Spanish Government (Agencia Estatal de Investigación MCIN/AEI/ 10.13039/501100011033) Grant No. PID2020-114473GB-I00, and Generalitat Valenciana Grants No. PROMETEO/2021/071 and ASFAE/2022/009 (Planes Complementarios de I+D+i, Next Generation EU). M.B. acknowledges the financial support from the European Union Horizon 2020 research and innovation programme: High precision multi-jet dynamics at the LHC (grant agreement no. 772009). L.C. and F.C. are supported by Generalitat Valenciana GenT Excellence Programme (CIDEGENT/2020/011) and ILINK22045.
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Becchetti, M., Bonciani, R., Cieri, L. et al. Two-loop form factors for diphoton production in quark annihilation channel with heavy quark mass dependence. J. High Energ. Phys. 2023, 105 (2023). https://doi.org/10.1007/JHEP12(2023)105
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DOI: https://doi.org/10.1007/JHEP12(2023)105