# Electroweak Baryon Number Non-Conservation in the Early Universe and in High Energy Collisions

## TL;DR

This paper reviews recent advances in understanding electroweak baryon number non-conservation at high temperatures and energies, discussing phase transitions, baryogenesis, and instanton processes relevant to early universe conditions.

## Contribution

It summarizes recent progress on electroweak baryon number violation, including high temperature phase transitions and implications for baryogenesis, highlighting current theoretical understanding and open questions.

## Key findings

- High temperature phase transitions relevant to baryon asymmetry
- Applications to electroweak baryogenesis mechanisms
- Status of electroweak instanton-like processes at high energies

## Abstract

We review recent progress in the study of the anomalous baryon number non-conservation at high temperatures and in high energy collisions. Recent results on high temperature phase transitions are described, and applications to electroweak baryogenesis are considered. The current status of the problem of electroweak instanton-like processes at high energies is outlined. This paper is written on the occasion of Sakharov's 75th anniversary and will appear in the memorial volume of Uspekhi (Usp. Fiz. Nauk, volume 166, No 5, May 1996).