Top-Yukawa effects on the β-function of the strong coupling in the SM at four-loop level
| Autor: | M. F. Zoller |
|---|---|
| Přispěvatelé: | University of Zurich, Zoller, M F |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Particle physics
Nuclear and High Energy Physics Standard Model 530 Physics High Energy Physics::Lattice 10192 Physics Institute 01 natural sciences symbols.namesake 0103 physical sciences ddc:530 Renormalization Group Limit (mathematics) 3106 Nuclear and High Energy Physics 010306 general physics Beta function Quantum chromodynamics Physics 010308 nuclear & particles physics High Energy Physics::Phenomenology Yukawa potential Order (ring theory) Loop (topology) High Energy Physics - Phenomenology symbols Higgs boson |
| Zdroj: | Journal of High Energy Physics |
| ISSN: | 1029-8479 |
| DOI: | 10.5445/ir/1000055473 |
| Popis: | We present analytical results for the QCD $\beta$-function extended to the gaugeless limit of the unbroken phase of the Standard Model at four-loop level. Apart from the strong coupling itself we include the top-Yukawa contribution and the Higgs self-coupling. We observe a non-naive $\gamma_5$ contribution at order $y_t^4 g_s^4$, a feature not encountered in lower loop orders. Comment: v2: more sophisticated treatment and more detailed description of the non-naive \gamma_5 contribution; Ref. added. v3: this the version published in JHEP; references [49,50] fixed; v4: changed statement on p.8: a different gamma_5 treatment only leads to a factor 3, not a factor 6 in the non-naive part compared to the prescription used in this paper. Note added on recent developments (p. 12) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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