منابع مشابه
Instantons at work
The aim of this review is to demonstrate that there exists a coherent picture of strong interactions, based on instantons. Starting from the first principles of Quantum Chromodynamics – via the microscopic mechanism of spontaneous chiral symmetry breaking – one arrives to a quantitative description of the properties of light hadrons, with no fitting parameters. The discussion of the importance ...
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We find solutions of the Yang-Mills field equations with gauge group SU(2) in 4k dimensions which have the interpretation of four-dimensional instantons at angles. These configurations satisfy a BPS-like condition which arises in the context of two-dimensional (4,0)-supersymmetric sigma models. Moreover we show that these solutions are examples of Hermitian-Einstein connections on E. In the pas...
متن کاملInstantons at Angles
We interpret a class of 4k-dimensional instanton solutions found by Ward, Corrigan, Goddard and Kent as four-dimensional instantons at angles. The super-position of each pair of four-dimensional instantons is associated with four angles which depend on some of the ADHM parameters. All these solutions are associated with the group Sp(k) and are examples of Hermitian-Einstein connections on E 4k....
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There is a close analogy between electroweak instanton-induced baryon plus lepton number (B + L) violating processes in Quantum Flavor Dynamics (QFD) and hard QCD instanton-induced chirality violating processes in deep-inelastic scattering. In view of the recent information about the latter both from lattice simulations and from the H1 experiment at HERA, it seems worthwhile to reconsider elect...
متن کاملDilute D-Instantons at Finite Temperature
We discuss Dirichlet instanton effects on type-IIB string thermodynamics. We review some general properties of dilute D-instanton gases and use the low-energy supergravity solutions to define the normalization of the instanton measure, as well as the effects of long-range interactions. Thermal singularities in the single-instanton sector are due to tachyonic winding modes of Dirichlet open stri...
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ژورنال
عنوان ژورنال: Progress in Particle and Nuclear Physics
سال: 2003
ISSN: 0146-6410
DOI: 10.1016/s0146-6410(03)90014-7