Automatic predictions in the Georgi-Machacek model at next-to-leading order accuracy

Degrande Celine; Hartling Katy; Logan Heather E.Peterson Andrea D.Zaro Marco

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Automatic predictions in the Georgi-Machacek model at next-to-leading order accuracy

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We study the phenomenology of the Georgi-Machacek model at next-to-leading order in QCD matched to a parton shower, using a fully automated tool chain based on MADGRAPH5_AMC@NLO and FEYNRULES. We focus on the production of the fermiophobic custodial fiveplet scalars H-5(0), H-5(+/-), and H-5(+/-+/-) through vector boson fusion (VBF), associated production with a vector boson (VH5), and scalar pair production (H5H5). For these production mechanisms we compute next-to-leading order corrections to production rates as well as to differential distributions. Our results demonstrate that the Standard Model overall K-factors for such processes cannot in general be directly applied to beyond-the-Standard-Model distributions, due both to differences in the scalar electroweak charges and to the variation of the K-factors over the differential distributions.

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《Physical review, D. Covering particles,fields,gravitation,and cosmology》 |2016年第3期|共13页
作者
Degrande Celine; Hartling Katy; Logan Heather E.Peterson Andrea D.Zaro Marco;
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作者单位

Univ Durham, Dept Phys, Inst Particle Phys Phenomenol, Durham DH1 3LE, England;

Carleton Univ, Ottawa Carleton Inst Phys, 1125 Colonel Dr, Ottawa, ON K1S 5B6, Canada;

Univ Paris 06, Univ Paris 04, LPTHE, UMR 7589, F-75005 Paris, France;

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正文语种英语
中图分类粒子物理学;场论;
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Automatic predictions in the Georgi-Machacek model at next-to-leading order accuracy

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