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https://hdl.handle.net/10316/114839
Título: | Higgs boson decay into gluons in a 4D regularization: IR cancellation without evanescent fields to NLO | Autor: | Pereira, Ana Cherchiglia, Adriano Sampaio, Marcos Hiller, Brigitte |
Data: | 2023 | Editora: | Springer Nature | Projeto: | FCT - CERN / FIS-PAR /0040 /2019 FCT - CERN /FIS-COM /0035 /2019 UID /FIS /04564 /2020 National Council for Scientific and Technological Development-CNPq through projects 166523/2020-8 and 302790 /2020-9 |
Título da revista, periódico, livro ou evento: | European Physical Journal C | Volume: | 83 | Número: | 1 | Resumo: | Higgs decay using an effective Higgs–Yang-Mills interaction in terms of a dimension five operator as well as usual QCD interactions is revisited in the context of Implicit Regularization (IReg) and compared with conventional dimensional regularization (CDR), four dimensional helicity (FDH) and dimensional reduction (DRED) schemes. The decay rate for H→ gg(g) is calculated in this strictly four-dimensional set-up to αs3 order in the strong coupling. Moreover we include joint processes that contribute at the same perturbative order in the real emission channels consisting of 3 gluons as well as gluon quark–antiquark final states with light (zero mass) quarks. Unambiguous identification and separation of UV from IR divergences is achieved putting at work the renormalization group scale relation inherent to the method. UV singularities are removed as usual by renormalization, the IR divergences are cancelled due to the method’s compliance with the Kinoshita–Lee–Nauenberg (KLN) theorem. Most importantly, we verify that no evanescent fields such as ϵ-scalars need be introduced as required by some mixed regularizations that operate partially in the physical dimension. | URI: | https://hdl.handle.net/10316/114839 | ISSN: | 1434-6052 | DOI: | 10.1140/epjc/s10052-023-11173-y | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Física - Artigos em Revistas Internacionais I&D CFis - Artigos em Revistas Internacionais |
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Higgs-boson-decay-into-gluons-in-a-4D-regularization-IR-cancellation-without-evanescent-fields-to-NLOEuropean-Physical-Journal-C.pdf | 536.28 kB | Adobe PDF | Ver/Abrir |
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