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We discuss supergraphs and their relation to "chiral functions" in N=4 Super Yang-Mills. Based on the magnon dispersion relation and an explicit three-loop result of Sieg's we make an all loop conjecture for the rational contributions of…

高能物理 - 理论 · 物理学 2015-05-30 Joseph A. Minahan

In perturbation theory, the anomalous dimensions of twist-two operators have poles at negative or small positive integer values of spin and therefore must be resummed at these points. It was observed earlier that a certain quadratic…

高能物理 - 理论 · 物理学 2025-06-06 A. N. Manashov , S. Moch , L. A. Shumilov

We argue that existing methods for the perturbative computation of anomalous dimensions and the disentanglement of mixing in N = 4 gauge theory can be considerably simplified, systematized and extended by focusing on the theory's dilatation…

高能物理 - 理论 · 物理学 2011-03-23 N. Beisert , C. Kristjansen , M. Staudacher

We consider the classical limit of the recently obtained exact result for the anomalous dimension of a cusped Wilson line with the insertion of an operator with L units of R-charge at the cusp in planar N=4 SYM. The classical limit requires…

高能物理 - 理论 · 物理学 2015-06-16 Grigory Sizov , Saulius Valatka

We derive the one loop mixing matrix for anomalous dimensions in N=4 Super Yang-Mills. We show that this matrix can be identified with the Hamiltonian of an integrable SO(6) spin chain with vector sites. We then use the Bethe ansatz to find…

高能物理 - 理论 · 物理学 2009-11-07 J. A. Minahan , K. Zarembo

The field theoretic renormalization group and operator product expansion are applied to the Kazantsev--Kraichnan kinematic model for the magnetohydrodynamic turbulence. The anomalous scaling emerges as a consequence of the existence of…

统计力学 · 物理学 2013-03-25 N. V. Antonov , N. M. Gulitskiy

Anomalous dimensions of Wilson operators with large Lorentz spin scale logarithmically with the spin. Recent multi-loop QCD calculations of twist-two anomalous dimensions revealed the existence of interesting structure of the subleading…

高能物理 - 理论 · 物理学 2008-11-26 B. Basso , G. P. Korchemsky

We compute the nonplanar contribution to the universal anomalous dimension of the SU(4)-singlet twist-two operators in N=4 supersymmetric Yang-Mills theory at four loops through Lorentz spin 18. From this, we numerically evaluate the…

高能物理 - 理论 · 物理学 2021-02-17 B. A. Kniehl , V. N. Velizhanin

In this talk we present the result for the $n_f$ dependent piece of the three-loop cusp anomalous dimension in QCD. Remarkably, it is parametrized by the same simple functions appearing in analogous anomalous dimensions in ${\mathcal N}=4$…

高能物理 - 理论 · 物理学 2014-08-21 Andrey Grozin , Johannes M. Henn , Gregory P. Korchemsky , Peter Marquard

We present the details of the analytic calculation of the three-loop angle-dependent cusp anomalous dimension in QCD and its supersymmetric extensions, including the maximally supersymmetric $\mathcal{N}=4$ super Yang-Mills theory. The…

高能物理 - 唯象学 · 物理学 2016-02-17 Andrey Grozin , Johannes M. Henn , Gregory P. Korchemsky , Peter Marquard

We calculate the three loop anomalous dimension for a general $N=1$ supersymmetric gauge theory. The result is used to probe the possible existence of renormalisation invariant relationships between the Yukawa and gauge couplings.

高能物理 - 唯象学 · 物理学 2008-11-26 I. Jack , D. R. T. Jones , C. G. North

We consider the anomalous dimension of the flavor non-singlet twist-two quark operator of arbitrary Lorentz spin N at four loops in QCD and construct its contribution proportional to zeta(3) in analytic form by applying advanced methods of…

高能物理 - 唯象学 · 物理学 2025-03-27 B. A. Kniehl , V. N. Velizhanin

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. Our calculation is performed in a basis with…

高能物理 - 唯象学 · 物理学 2025-06-18 Luca Naterop , Peter Stoffer

We introduce a method for extracting the cusp anomalous dimension at L loops from four-gluon amplitudes in N=4 Yang-Mills without evaluating any integrals that depend on the kinematical invariants. We show that the anomalous dimension only…

高能物理 - 理论 · 物理学 2008-11-26 Freddy Cachazo , Marcus Spradlin , Anastasia Volovich

We determine anomalous dimensions of a family of fixed hypercharge operators in the Standard Model featuring the general Cabibbo-Kobayashi-Maskawa structure. The results are obtained at infinite orders in the couplings and to leading and…

高能物理 - 唯象学 · 物理学 2023-12-21 Oleg Antipin , Jahmall Bersini , Pantelis Panopoulos , Francesco Sannino , Zhi-Wei Wang

Recently, we reported an anomalous enhancement of the positive magnetoresistance beyond a critical magnetic field in Tb5Si3 in the magnetically ordered state, attributable to 'inverse metamagnetism'. This results in unusual magnetic…

强关联电子 · 物理学 2015-06-03 K. Mukherjee , Kartik K. Iyer , E. V. Sampathkumaran

We study anomalous dimensions of (super)conformal Wilson operators at weak and strong coupling making use of the integrability symmetry on both sides of the gauge/string correspondence and elucidate the origin of their single-logarithmic…

高能物理 - 理论 · 物理学 2008-11-26 A. V. Belitsky , A. S. Gorsky , G. P. Korchemsky

Motivated by recent work of Dijkgraaf and Vafa, we study anomalies and the chiral ring structure in a supersymmetric U(N) gauge theory with an adjoint chiral superfield and an arbitrary superpotential. A certain generalization of the…

高能物理 - 理论 · 物理学 2010-04-07 Freddy Cachazo , Michael R. Douglas , Nathan Seiberg , Edward Witten

We consider twist-3 operators in the sl(2) sector of N=4 SYM built out of three scalar fields with derivatives. We extract from the Bethe Ansatz equations of this sector the exact lowest anomalous dimension gamma(s) of scaling fields for…

高能物理 - 理论 · 物理学 2009-11-13 Matteo Beccaria

This talk presents details of the calculation of two-loop corrections to heavy baryon currents containing one heavy quark in leading order of the $1/m_Q$-expansion, i.e. in the limit of Heavy Quark Symmetry (HQS). The calculations lead to…

高能物理 - 唯象学 · 物理学 2007-05-23 Stefan Groote