Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-10-08
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages, 5 figures. To be published in proceedings of XI-th International School "Particles and Cosmology", Baksan, Russia 20
Scientific paper
We use semiclassical methods to calculate the probability of inducing a change of topology via a high-energy collision in the SU(2)-Higgs theory. This probability is determined by a complex solution to a classical boundary value problem on a contour in the complex time plane. In the case of small particle number it is the probability of instanton-like processes in particle collisions. We obtain numerically configurations with the correct topological features and expected properties in the complex time plane. Our work demonstrates the feasibility of the numerical approach to the calculation of instanton-like processes in gauge theories. We present our preliminary results for the suppression factor of topology changing processes, which cover a wide range of incoming particle numbers and energies below the sphaleron energy.
Bezrukov Fedor
Rebbi Claudio
Rubakov Valery
Tinyakov Peter
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