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In this paper we consider the matching coefficient of the vector current between Quantum Chromodynamics (QCD) and Non-Relativistic QCD (NRQCD) to three-loop order in perturbation theory. We evaluate the fermionic corrections containing a…

高能物理 - 唯象学 · 物理学 2008-11-26 P. Marquard , J. H. Piclum , D. Seidel , M. Steinhauser

We calculate one-loop correction to the axial charges of the octet baryons using quenched chiral perturbation theory, in order to understand chiral behavior of the axial charges in quenched approximation to quantum chromodynamics (QCD). In…

高能物理 - 格点 · 物理学 2009-10-28 Myunggyu Kim , Seyong Kim

Two-loop corrections for the <VVA> correlator of the singlet axial and vector currents in QCD are calculated in the chiral limit for arbitrary momenta. Explicit calculations confirm the non-renormalization theorems derived recently by…

高能物理 - 唯象学 · 物理学 2009-11-11 F. Jegerlehner , O. V. Tarasov

Chiral Magnetic Effect(CME) is usually believed not receiving higher order corrections due to the non-renormalization of AVV triangle diagram in the framework of quantum field theory. However, the CME-relevant triangle, which is obtained by…

高能物理 - 唯象学 · 物理学 2018-05-30 Kit-fai Chu , Peng-hui Huang , Hui Liu

This is an article which intends to shake down the traditional belief that the celebrated Adler-Bell-Jackiw anomaly stems from the chiral rotation non-invariance of the fermionic measure. The fermionic functional integration measure in…

综合物理 · 物理学 2019-11-12 Israel Weimin Sun

We perform a complete one-loop renormalization analysis of CPT-odd Lorentz-violating scalar quantum chromodynamics with adjoint scalar matter. Working to first order in the preferred background vector and treating the corresponding…

高能物理 - 理论 · 物理学 2026-05-04 J. C. C. Felipe , L. C. T. Brito , A. C. Lehum , B. Altschul , A. Yu. Petrov

We elaborate in this paper a translation-invariant model for fermions in 4-dimensional noncommutative Euclidean space. The construction is done on the basis of the renormalizable noncommutative translation-invariant Phi4 theory introduced…

高能物理 - 理论 · 物理学 2015-08-17 Karim Bouchachia , Smain Kouadik , Mahmoud Hachemane , Manfred Schweda

Lorentz violation emerged from a fundamental description of nature may impact, at low energies, the Maxwell sector, so that contributions from such new physics to the electromagnetic vertex would be induced. Particularly, nonbirefringent…

高能物理 - 唯象学 · 物理学 2014-09-03 A. Moyotl , H. Novales-Sánchez , J. J. Toscano , E. S. Tututi

We demonstrate that the results of the complete first order calculation of the non-factorizable QED corrections to the single-inclusive cross-sections for $e^+e^- \to W^+W^- \to 4$ fermions could be very well reproduced by a simple…

高能物理 - 唯象学 · 物理学 2011-09-13 A. P. Chapovsky , V. A. Khoze

In this paper, we discuss the behavior of the Carroll-Field-Jackiw (CFJ) coefficient $k^{\mu}$ arising due to integration over massive fermions, and the modification suffered by its topological structure in the finite temperature case. Our…

高能物理 - 理论 · 物理学 2017-01-04 J. F. Assuncao , T. Mariz , A. Yu. Petrov

In this work we focus on the Carroll-Field-Jackiw (CFJ) modified electrodynamics in combination with a CPT-even Lorentz-violating contribution. We add a photon mass term to the Lagrange density and study the question whether this…

高能物理 - 理论 · 物理学 2020-03-25 Manoel M. Ferreira, , Jose A. Helayël-Neto , Carlos M. Reyes , Marco Schreck , Pedro D. S. Silva

In this paper, we explicitly calculate the lower CPT-even one-loop quantum corrections in nonminimal Lorentz-violating spinor QED with all possible CPT-even dimension-5 operators. Within our calculations, we restrict ourselves to the cases…

高能物理 - 理论 · 物理学 2024-01-19 T. Mariz , M. Melo , J. R. Nascimento , A. Yu. Petrov

This paper is part of a series of papers exploring the renormalization of field theories coupled to gravity using the effective field theory framework. In previous works we studied the universality of the electric charge and the two-loops…

高能物理 - 理论 · 物理学 2022-08-11 Huan Souza , L. Ibiapina Bevilaqua , A. C. Lehum

The issue of Lorentz fine-tuning in effective theories containing higher-order operators is studied. To this end, we focus on the Myers-Pospelov extension of QED with dimension-five operators in the photon sector and standard fermions. We…

高能物理 - 唯象学 · 物理学 2015-05-18 Carlos M. Reyes , Sebastian Ossandon , Camilo Reyes

We report a calculation of all two-loop QED corrections with closed fermion loops for the n=1 and n=2 states of H-like ions and for a wide range of the nuclear charge numbers Z=1-100. The calculation is performed to all orders in the…

原子物理 · 物理学 2009-11-13 V. A. Yerokhin , P. Indelicato , V. M. Shabaev

Low-energy Lorentz-invariant quantities could receive contributions from a fundamental theory producing small Lorentz-violating effects. Within the Lorentz-violating extension of quantum electrodynamics, we investigate, perturbatively, the…

高能物理 - 唯象学 · 物理学 2014-03-20 A. Moyotl , H. Novales-Sánchez , J. J. Toscano , E. S. Tututi

Two-loop contributions to the electromagnetic form factors are calculated in the kinematic regime close to the fermion-antifermion threshold. The results are presented in an expansion in the velocity $\beta$ of the fermions in the c.m.…

高能物理 - 唯象学 · 物理学 2014-11-17 A. H. Hoang

We prove explicitly the absence of one-loop corrections to large scales from small scales in transient non-slow-roll dynamics. Specifically, we address loop corrections to the primordial power spectrum, relative to tree-level, that are…

宇宙学与河外天体物理 · 物理学 2025-02-04 Jacopo Fumagalli

We study the finite temperature properties of the Maxwell-Carroll-Field-Jackiw (MCFJ) electrodynamics for a purely spacelike background. Starting from the associated finite temperature partition function, a modified black body spectral…

高能物理 - 理论 · 物理学 2008-12-30 Rodolfo Casana , Manoel M. Ferreira , Josberg S. Rodrigues

We calculate higher-order quantum contributions in different Lorentz-violating parameters to the gauge sector of the extended QED. As a result of this one-loop calculation, some terms which do not produce first-order corrections, contribute…

高能物理 - 唯象学 · 物理学 2018-08-21 A. P. Baeta Scarpelli , L. C. T. Brito , J. C. C. Felipe , J. R. Nascimento , A. Yu. Petrov