Semiclassical Study of Baryon and Lepton Number Violation in High-Energy Electroweak Collisions

Details Semiclassical Study of Baryon and Lepton Number Violation in High-Energy Electroweak Collisions Semiclassical Study of Baryon and Lepton Number Violation in High-Energy Electroweak Collisions

2003-04-18

arxiv.org/abs/hep-ph/0304180v2

Phys.Rev.D68:036005,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 18 figures. Phys.Rev.D journal version (two references added)

Scientific paper

10.1103/PhysRevD.68.036005

We make use of a semiclassical method for calculating the suppression exponent for topology changing transitions in high-energy electroweak collisions. In the Standard Model these processes are accompanied by violation of baryon and lepton number. By using a suitable computational technique we obtain results for s-wave scattering in a large region of initial data. Our results show that baryon and lepton number violation remains exponentially suppressed up to very high energies of at least 30 sphaleron masses (250 TeV). We also conclude that the known analytic approaches inferred from low energy expansion provide reasonably good approximations up to the sphaleron energy (8 TeV) only.

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