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arXiv · 1905.11771

Next-to-leading power threshold effects for resummed prompt photon production

Melissa van Beekveld·Wim Beenakker·Rahul Basu·Eric Laenen·Anuradha Misra·Patrick Motylinski
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Abstract

We assess and compare different methods for including leading threshold logarithms at next-to-leading-power in prompt photon production at hadron colliders, for both the direct and parton fragmentation mechanisms. We do this in addition to next-to-leading logarithmic threshold and joint resummation at leading power. We study the size of these effects and their scale variations for LHC kinematics. We find that the next-to-leading power effects have a noticeable effect on the photon transverse momentum distribution, typically of order $\mathcal{O}(10\%)$, depending on the method of inclusion. Our results indicate that next-to-leading power terms can reduce the scale dependence of the distribution considerably.

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Melissa van Beekveld, Wim Beenakker, Rahul Basu, Eric Laenen, Anuradha Misra, Patrick Motylinski. 2019-05-28. Next-to-leading power threshold effects for resummed prompt photon production. https://doi.org/10.1103/physrevd.100.056009

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