star-Cohomology, Third Type Chern Character and Anomalies in General Translation-Invariant Noncommutative Yang-Mills

TL;DR

This paper develops a cohomological framework for translation-invariant noncommutative Yang-Mills theories using star-cohomology and noncommutative Chern characters, revealing topological aspects and anomalies.

Contribution

It introduces star-cohomology and a noncommutative Chern character framework for translation-invariant noncommutative gauge theories, extending classical topological methods.

Findings

Defined a noncommutative Chern character as an equivariant form.

Analyzed anomalies in noncommutative Yang-Mills theories.

Provided exact solutions for anomalous behaviors.

Abstract

A representation of general translation-invariant star products in the algebra of M(C) = lim_N\to \infty M_N (C) is introduced which results in the Moyal-Weyl-Wigner quantization. It provides a matrix model for general translation-invariant noncommutative quantum field theories in terms of the noncommutative calculus on differential graded algebras. Upon this machinery a cohomology theory, the so called star-cohomology, with groups H^k_*(C), is worked out which provides a cohomological framework to formulate general translation-invariant noncommutative quantum field theories based on the achievements for the commutative fields, and is comparable to the Seiberg-Witten map for the Moyal case. Employing the Chern-Weil theory via the integral classes of H^k_*(Z) a noncommutative version of the Chern character is defined as an equivariant form which contains topological information about the corresponding translation-invariant noncommutative Yang-Mills theory. Thereby we study the mentioned Yang-Mills theories with three types of actions of the gauge fields on the spinors, the ordinary, the inverse, and the adjoint action, and then some exact solutions for their anomalous behaviors are worked out via employing the homotopic correlation on the integral classes of *-cohomology. Finally, the corresponding consistent anomalies are also derived from this topological Chern character in the *-cohomology.