Results 41 to 50 of about 122 (77)
Analytic resurgence in the O(4) model
Journal of High Energy Physics, 2022 We study the perturbative expansion of the ground state energy in the presence of an external field coupled to a conserved charge in the integrable two-dimensional O(4) nonlinear sigma model.
Zoltán Bajnok +2 more
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Journal of High Energy Physics, 2018 For the general renormalizable N=1 $$ \mathcal{N}=1 $$ supersymmetric gauge theory we investigate renormalization of the Faddeev-Popov ghosts using the higher covariant derivative regularization. First, we find the two-loop anomalous dimension defined in
A. E. Kazantsev +6 more
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Journal of High Energy Physics, 2019 The three-loop Adler D-function for N = 1 $$ \mathcal{N}=1 $$ SQCD in the D R ¯ $$ \overline{\mathrm{DR}} $$ scheme is calculated starting from the three-loop result recently obtained with the higher covariant derivative regularization. For this purpose,
S. S. Aleshin +2 more
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Toward massless and massive event shapes in the large-β 0 limit
Journal of High Energy Physics, 2021 We present results for SCET and bHQET matching coefficients and jet functions in the large-β 0 limit. Our computations exactly predict all terms of the form α s n + 1 n f n $$ {\alpha}_s^{n+1}{n}_f^n $$ for any n ≥ 0, and we find full agreement with the ...
N. G. Gracia, V. Mateu
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Journal of High Energy Physics, 2018 The Wilsonian renormalization group (RG) requires Euclidean signature. The conformal factor of the metric then has a wrong-sign kinetic term, which has a profound effect on its RG properties.
Tim R. Morris
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Bion non-perturbative contributions versus infrared renormalons in two-dimensional ℂP N − 1 models
Journal of High Energy Physics, 2019 We derive the semiclassical contributions from the real and complex bions in the two-dimensional ℂP N − 1 sigma model on ℝ×S 1 with a twisted boundary condition. The bion configurations are saddle points of the complexified Euclidean action, which can be
Toshiaki Fujimori +4 more
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Hyperasymptotic approximation to the plaquette and determination of the gluon condensate
Journal of High Energy Physics, 2020 We give the hyperasymptotic expansion of the plaquette with a precision that includes the terminant associated to the leading renormalon. Subleading effects are also considered.
Cesar Ayala +2 more
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Journal of High Energy Physics, 2020 We study the application of the Breitenlohner-Maison-’t Hooft-Veltman (BMHV) scheme of Dimensional Regularization to the renormalization of chiral gauge theories, focusing on the specific counterterm structure required by the non-anticommuting Dirac γ 5 ...
Hermès Bélusca-Maïto +3 more
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Journal of High Energy Physics, 2021 We apply the BMHV scheme for non-anticommuting γ 5 to an abelian chiral gauge theory at the two-loop level. As our main result, we determine the full structure of symmetry-restoring counterterms up to the two-loop level.
Hermès Bélusca-Maïto +4 more
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Factorization at subleading power and endpoint-divergent convolutions in h → γγ decay
Journal of High Energy Physics, 2020 It is by now well known that, at subleading power in scale ratios, factorization theorems for high-energy cross sections and decay amplitudes contain endpoint-divergent convolution integrals.
Ze Long Liu, Matthias Neubert
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