Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Stuart, Samuel"'
Publikováno v:
Physics Reports. 259:1-145
The antibracket formalism for gauge theories, at both the classical and quantum level, is reviewed. Gauge transformations and the associated gauge structure are analyzed in detail. The basic concepts involved in the antibracket formalism are elucidat
Autor:
Stuart Samuel
Publikováno v:
Modern Physics Letters A. :2007-2016
If certain long-ranged interactions between instantons are present, the θ parameter relaxes to zero. The question is raised as to whether this can happen in Yang-Mills theory thereby leading to a natural solution of the strong CP problem. A lattice
Autor:
V. Alan Kostelecký, Stuart Samuel
Publikováno v:
Physics Letters B. 270:21-28
We investigate the implications for experiment of the existence of compactified dimensions with a scale much larger than the Planck length. Such manifolds might occur in certain string models, for instance, if the compactification process is related
Autor:
Stuart Samuel
Publikováno v:
Nuclear Physics B. 341:513-610
The integrand and integration region for the N-point amplitude in the open oriented bosonic string are obtained to all orders in perturbation theory. The result is derived from the Witten covariant string field theory by using on-shell and off-shell
Autor:
V. Alan Kostelecký, Stuart Samuel
Publikováno v:
Nuclear Physics B. 336:263-296
In the context of covariant string field theory, we investigate the existence and properties of nonperturbative vacua for the open bosonic string. The study is performed using successive orders in a level-truncation method. We find a candidate nonper
Autor:
Stuart Samuel
Energy eigenstates for N=2 supersymmetric gauged quantum mechanics are found for the gauges groups SU(n) and U(n). The analysis is aided by the existence of an infinite number of conserved operators. The spectum is continuous. Perturbative eigenstate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dad60b32d52668a0798bb8253d83cf48
http://arxiv.org/abs/hep-th/9705167
http://arxiv.org/abs/hep-th/9705167
Autor:
Kosteleck Va, Stuart Samuel
Publikováno v:
Physical review. D, Particles and fields. 42(4)
A second-quantized analysis is performed to examine many-body phenomena in closed bosonic strings. The covariant nonpolynomial closed-string field theory is developed in terms of particle fields and shown to contain interactions triggering a nonpertu
Autor:
Stuart Samuel, Olaf Lechtenfeld
Publikováno v:
Physics Letters B. 213:431-438
A violation of gauge invariance in Witten's open superstring field theory has recently been discovered. We propose a modification which resolves this problem by avoiding the collision of picture-changing operators. Feynman rules for the modified, gau
Autor:
Stuart Samuel
Publikováno v:
Journal of Mathematical Physics. 21:2695-2703
Formulas for the evaluation of all U(N) integrals are derived. Tables display the results for integrands involving up to six U’s and six U°’s. The complete pole structure of De Wit–’t Hooft anomalies is unveiled. The effects of 1/N2 correcti
Autor:
Olaf Lechtenfeld, Stuart Samuel
Publikováno v:
Nuclear Physics B. 308:361-378
We employ BRST invariance to explicitly determine the ghost part of the four-point vertex in Witten's open, bosonic, string field theory. This allows the computation of any covariant off-shell four-point amplitude involving physical as well as first-