Results 111 to 120 of about 35,463 (213)

Renormalization-group equations of the LEFT at two loops: dimension-five effects

Journal of High Energy Physics
We present the first part of a systematic calculation of the two-loop anomalous dimensions in the low-energy effective field theory (LEFT): the effects at dimension five in the power counting.
Luca Naterop, Peter Stoffer
doaj   +1 more source

Regularization, renormalization, and renormalization groups

, 2011
This paper confronts renormalization used in quantum field theory and that used in critical phenomena studies in statistical mechanics or dynamical systems theory. Regularization that cures spurious divergences is distinguished from renormalization transformations allowing to compute actual physical divergences.
openaire   +1 more source

P-wave Sommerfeld enhancement near threshold: a simplified approach. [PDF]

Eur Phys J C Part Fields, 2023
de Lima CH, Tonero A, Vasquez A, Rosenfeld R.   +3 more
europepmc   +1 more source

Renormalization-group equations of the LEFT at two loops: dimension-six operators

Journal of High Energy Physics
We present the third part of a systematic calculation of the two-loop anomalous dimensions for the low-energy effective field theory below the electroweak scale (LEFT): insertions of dimension-six operators that conserve baryon number.
Luca Naterop, Peter Stoffer
doaj   +1 more source

Non-perturbative renormalisation and improvement of non-singlet tensor currents in N f = 3 QCD

Journal of High Energy Physics
Hadronic matrix elements involving tensor currents play an important rôle in decays that allow to probe the consistency of the Standard Model via precision lattice QCD calculations. The non-singlet tensor current is a scale-dependent (anomalous) quantity.
Leonardo Chimirri, Patrick Fritzsch, Jochen Heitger, Fabian Joswig, Marco Panero, Carlos Pena, David Preti   +6 more
doaj   +1 more source

Three-loop renormalization of the quantum action for a four-dimensional scalar model with quartic interaction with the usage of the background field method and a cutoff regularization

Nuclear Physics B
The paper studies the quantum action for the four-dimensional real ϕ4-theory in the case of a general formulation using the background field method. The three-loop renormalization is performed with the usage of a cutoff regularization in the coordinate ...
Aleksandr V. Ivanov
doaj   +1 more source

Alternate computation of gravitational effects from a single loop of inflationary scalars

Journal of High Energy Physics
We present a new computation of the renormalized graviton self-energy induced by a loop of massless, minimally coupled scalars on de Sitter background. Our result takes account of the need to include a finite renormalization of the cosmological constant,
S. P. Miao, N. C. Tsamis, R. P. Woodard
doaj   +1 more source

Effective potential and vacuum stability in the Litim-Sannino model

Journal of High Energy Physics
We revisit the scalar potential in the Litim-Sannino model. We compute for the first time the full quantum corrections to the classical potential and show that they significantly ameliorate the stability analysis at the UV fixed point.
Tom Steudtner
doaj   +1 more source

Low-energy effective field theory below the electroweak scale: one-loop renormalization in the ’t Hooft-Veltman scheme

Journal of High Energy Physics
The low-energy effective field theory below the electroweak scale (LEFT) describes the effects at low energies of both the weak interaction and physics beyond the Standard Model.
Luca Naterop, Peter Stoffer
doaj   +1 more source

An in-silico NMR laboratory for nuclear magnetic shieldings computed via finite fields: Exploring nucleus-specific renormalizations of MP2 and MP3. [PDF]

J Chem Phys, 2023
Wong J, Ganoe B, Liu X, Neudecker T, Lee J, Liang J, Wang Z, Li J, Rettig A, Head-Gordon T, Head-Gordon M.   +10 more
europepmc   +1 more source