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   Articles with "renormalisation" as a keyword



Single-scale renormalisation group improvement of multi-scale effective potentials

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recommendations! Published in 2018 at "Journal of High Energy Physics"

DOI: 10.1007/jhep03(2018)014

Abstract: A bstractWe present a new method for renormalisation group improvement of the effective potential of a quantum field theory with an arbitrary number of scalar fields. The method amounts to solving the renormalisation group equation… read more here.

Keywords: renormalisation group; effective potential; group improvement; renormalisation ... See more keywords

Neutral kaon mixing beyond the Standard Model with nf = 2 + 1 chiral fermions. Part 2: non perturbative renormalisation of the ΔF = 2 four-quark operators

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recommendations! Published in 2017 at "Journal of High Energy Physics"

DOI: 10.1007/jhep10(2017)054

Abstract: A bstractWe compute the renormalisation factors (Z-matrices) of the ΔF = 2 four-quark operators needed for Beyond the Standard Model (BSM) kaon mixing. We work with nf = 2+1 flavours of Domain-Wall fermions whose chiral-flavour… read more here.

Keywords: kaon mixing; beyond standard; standard model; quark operators ... See more keywords

Renormalisation in maximally symmetric spaces and semiclassical gravity in Anti-de Sitter spacetime

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recommendations! Published in 2024 at "Classical and Quantum Gravity"

DOI: 10.1088/1361-6382/adc535

Abstract: We obtain semiclassical gravity solutions in the Poincaré fundamental domain of (3+1)-dimensional Anti-de Sitter spacetime, PAdS4, with a (massive or massless) Klein–Gordon field (with possibly non-trivial curvature coupling) with Dirichlet or Neumann boundary. Some results… read more here.

Keywords: anti sitter; gravity; maximally symmetric; sitter spacetime ... See more keywords

Renormalisation group improvement in the stochastic formalism

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recommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2019/09/023

Abstract: We investigate compatibility between the stochastic infrared (IR) resummation of light test fields on inflationary spacetimes and renormalisation group running of the ultra-violet (UV) physics. Using the Wilsonian approach, we derive improved stochastic Langevin and… read more here.

Keywords: renormalisation group; physics; group improvement; formalism ... See more keywords