期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 11, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP11(2017)057
关键词
NLO Computations; QCD Phenomenology
资金
- Research Executive Agency (REA) of the European Union [PITN-GA-2012-316704]
- Netherlands Foundation for Fundamental Research of Matter (FOM) programme 156
- National Organisation for Scientific Research (NWO)
- U.K. Science and Technology Facilities Council (STFC)
- People Programme (Marie Curie Actions) of the European Union Horizon Framework H2020-MSCA-IF, under REA [656463]
- Science and Technology Facilities Council [ST/L000415/1] Funding Source: researchfish
- STFC [ST/L000415/1] Funding Source: UKRI
- Marie Curie Actions (MSCA) [656463] Funding Source: Marie Curie Actions (MSCA)
We consider the production of an arbitrary number of colour-singlet particles near partonic threshold, and show that next-to-leading order cross sections for this class of processes have a simple universal form at next-to-leading power (NLP) in the energy of the emitted gluon radiation. Our analysis relies on a recently derived factorisation formula for NLP threshold effects at amplitude level, and therefore applies both if the leading-order process is tree-level and if it is loop-induced. It holds for differential distributions as well. The results can furthermore be seen as applications of recently derived next-to-soft theorems for gauge theory amplitudes. We use our universal expression to re-derive known results for the production of up to three Higgs bosons at NLO in the large top mass limit, and for the hadro-production of a pair of electroweak gauge bosons. Finally, we present new analytic results for Higgs boson pair production at NLO and NLP, with exact top-mass dependence.
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