The production of electroweak Z bosons that decay to neutrinos and recoil against jets with large transverse momentum p⊥ is an important background process to searches for dark matter at the Large Hadron Collider (LHC). To fully benefit from opportunities offered by the future high-luminosity LHC, the theoretical description of the pp → Z + j process should be extended to include mixed QCD-electroweak corrections. The goal of this paper is to initiate the computation of such corrections starting with the calculation of the Feynman integrals needed to describe two-loop QCD-electroweak contributions to qq¯ → Z + g scattering amplitudes. Making use of the hierarchy between the large transverse momenta of the recoiling jet, relevant for heavy dark matter searches, and the Z boson mass mZ , we present the relevant master integrals as a series expansion in mZ/p⊥.
Two-loop QCD-EW master integrals for Z plus jet production at large transverse momentum / H. Frellesvig, K. Kudashkin, C. Wever. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2020:5(2020 May). [10.1007/JHEP05(2020)038]
Two-loop QCD-EW master integrals for Z plus jet production at large transverse momentum
K. KudashkinSecondo
;
2020
Abstract
The production of electroweak Z bosons that decay to neutrinos and recoil against jets with large transverse momentum p⊥ is an important background process to searches for dark matter at the Large Hadron Collider (LHC). To fully benefit from opportunities offered by the future high-luminosity LHC, the theoretical description of the pp → Z + j process should be extended to include mixed QCD-electroweak corrections. The goal of this paper is to initiate the computation of such corrections starting with the calculation of the Feynman integrals needed to describe two-loop QCD-electroweak contributions to qq¯ → Z + g scattering amplitudes. Making use of the hierarchy between the large transverse momenta of the recoiling jet, relevant for heavy dark matter searches, and the Z boson mass mZ , we present the relevant master integrals as a series expansion in mZ/p⊥.File | Dimensione | Formato | |
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