Theoretical Physics
https://qmro.qmul.ac.uk/xmlui/handle/123456789/3567
2019-02-22T16:44:43Z
2019-02-22T16:44:43Z
The self-dual classical double copy, and the Eguchi-Hanson instanton
Berman, DS
Chacón, E
Luna, A
White, CD
https://qmro.qmul.ac.uk/xmlui/handle/123456789/55494
2019-02-22T11:03:30Z
2019-01-01T00:00:00Z
The self-dual classical double copy, and the Eguchi-Hanson instanton
Berman, DS; Chacón, E; Luna, A; White, CD
The double copy is a map from non-abelian gauge theories to gravity, that has been demonstrated both for scattering amplitudes and exact classical solutions. In this study, we reconsider the double copy for exact solutions that are self-dual in either the gauge or gravity theory. In this case, one may formulate a general double copy in terms of a certain differential operator, which generates the gauge and gravity solutions from a harmonic function residing in a biadjoint scalar theory. As an illustration, we examine the single copy of the well-known Eguchi-Hanson instanton in gravity. The gauge field thus obtained represents an abelian-like object whose field is dipole-like at large distances, and which has no magnetic or electric charge.
2019-01-01T00:00:00Z
A note on the Virasoro blocks at order 1/c
Bombini, A
Giusto, S
Russo, R
https://qmro.qmul.ac.uk/xmlui/handle/123456789/54829
2019-01-24T07:30:12Z
2019-01-03T00:00:00Z
A note on the Virasoro blocks at order 1/c
Bombini, A; Giusto, S; Russo, R
2019-01-03T00:00:00Z
Biadjoint wires
Bahjat-Abbas, N
Stark-Muchão, R
White, CD
https://qmro.qmul.ac.uk/xmlui/handle/123456789/54639
2019-01-16T10:30:25Z
2018-11-20T00:00:00Z
Biadjoint wires
Bahjat-Abbas, N; Stark-Muchão, R; White, CD
© 2018 The Author(s) Biadjoint scalar field theory has been the subject of much recent study, due to a number of applications in field and string theory. The catalogue of exact non-linear solutions of this theory is relatively unexplored, despite having a role to play in extending known relationships between gauge and gravity theories, such as the double copy. In this paper, we present new solutions of biadjoint scalar theory, corresponding to singular line configurations in four spacetime dimensions, with a power-law dependence on the cylindrical radius. For a certain choice of common gauge group (SU(2)), a family of infinitely degenerate solutions is found, whose existence can be traced to the global symmetry of the theory. We also present extended solutions, in which the pure power-law divergence is partially screened by a form factor.
2018-11-20T00:00:00Z
Tr(F-3) supersymmetric form factors and maximal transcendentality. Part II. 0 < N < 4 super Yang-Mills
Brandhuber, A
Kostacinska, M
Penante, B
Travaglini, G
https://qmro.qmul.ac.uk/xmlui/handle/123456789/54184
2019-01-16T01:30:34Z
2018-12-13T00:00:00Z
Tr(F-3) supersymmetric form factors and maximal transcendentality. Part II. 0 < N < 4 super Yang-Mills
Brandhuber, A; Kostacinska, M; Penante, B; Travaglini, G
2018-12-13T00:00:00Z