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001     643123
005     20260107122416.0
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024 7 _ |a arXiv:2502.03282
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024 7 _ |a 10.1007/JHEP12(2025)106
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100 1 _ |a Ahmed, Taushif
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245 _ _ |a Two-loop helicity amplitudes for diphoton production with massive quark loop
260 _ _ |a Heidelberg
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500 _ _ |a Ancillary files at DOI: https://zenodo.org/records/14809206
520 _ _ |a We compute two-loop helicity amplitudes in QCD for diphoton production through quark- and gluon-initiated channels, accounting for a massive internal quark loop by keeping its full mass dependence. Using physical projectors, we directly decompose the amplitude into its helicity components. By renormalising the heavy quark mass in on-shell, and other quantities in $\overline{\rm MS}$ schemes, we obtain finite remainders. This work paves the way for calculating the cross-section for diphoton production at higher orders in QCD with a massive quark loop, employing different subtraction schemes. The effect of a heavy quark is expected to play a crucial role in high-luminosity LHC.
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693 _ _ |a LHC
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700 1 _ |a Chakraborty, Amlan
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700 1 _ |a Chaubey, Ekta
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700 1 _ |a Kaur, Mandeep
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773 _ _ |a 10.1007/JHEP12(2025)106
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|t Journal of high energy physics
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787 0 _ |a Ahmed, Taushif et.al.
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|t Two-loop helicity amplitudes for diphoton production with massive quark loop
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