Results 91 to 100 of about 1,025 (174)

The chiral torsional anomaly and the Nieh-Yan invariant with and without boundaries

open access: yesJournal of High Energy Physics
There exists a long-standing debate regarding the torsion contribution to the 4d chiral anomaly of a Dirac fermion. Central to this debate is the Nieh-Yan anomaly, which has been considered ill-defined and a regularization artifact.
Johanna Erdmenger   +3 more
doaj   +1 more source

Light-ray sum rules and the c-anomaly

open access: yesJournal of High Energy Physics
In a four-dimensional quantum field theory that flows between two fixed points under the renormalization group, the change in the conformal anomaly ∆a has been related to the average null energy.
Thomas Hartman, Grégoire Mathys
doaj   +1 more source

Towards a complete classification of 6D supergravities

open access: yesJournal of High Energy Physics
The constraints arising from anomaly cancellation are particular strong for chiral theories in six dimensions. We make progress towards a complete classification of 6D supergravities with minimal supersymmetry and non-abelian gauge group.
Yuta Hamada, Gregory J. Loges
doaj   +1 more source

Axial anomalies of maximally supersymmetric tensor theories

open access: yesJournal of High Energy Physics
We revisit anomalies of (4, 0) and (3, 1) maximally supersymmetric tensor theories in d = 6. A (4, 0) on-shell tensor multiplet descends to that of the d = 5 maximal supergravity upon a dimensional reduction, hypothesized to offer a strong-coupled UV ...
Piljin Yi, Yi Zhang
doaj   +1 more source

Anomaly cancellation for a U(1) factor

open access: yesJournal of High Energy Physics
We use methods of arithmetic geometry to find solutions to the abelian local anomaly cancellation equations for a four-dimensional gauge theory whose Lie algebra has a single $${\mathfrak{u}}_{1}$$ summand, assuming that a non-trivial solution exists ...
Ben Gripaios, Khoi Le Nguyen Nguyen
doaj   +1 more source

Enumerating 6D supergravities with T ≤ 1

open access: yesJournal of High Energy Physics
The space of 6D supergravities with minimal supersymmetry is greatly constrained by anomaly cancellation. Nevertheless, a large number of models satisfy all low-energy consistency conditions and in this work we make progress towards exhaustively ...
Yuta Hamada, Gregory J. Loges
doaj   +1 more source

Constraints on the topology of Type IIB string theory

open access: yesJournal of High Energy Physics
We discuss some topological constraints on Type IIB string theory that cannot be described by elementary characteristic classes. Anomaly cancellation of the worldvolume theory of a D3-brane requires a shifted Dirac quantization condition of the Ramond ...
Kazuya Yonekura
doaj   +1 more source

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