Publication: Kinetic Approach to Pair Production in Strong Fields-Two Lessons for Applications to Heavy-Ion Collisions
Дата
2019
Авторы
Blaschke, D. B.
Juchnowski, L.
Otto, A.
Journal Title
Journal ISSN
Volume Title
Издатель
Аннотация
The kinetic-equation approach to particle production in strong, time-dependent external fields is revisited and three limiting cases are discussed for different field patterns: the Sauter pulse, a harmonic pulse with a Gaussian envelope, and a Poisson-distributed stochastic field. It is shown that for transient subcritical electric fields E (t) a finite residual particle number density n(<yen>) would be absent if the field-dependence of the dynamical phase in the Schwinger source term would be neglected. In this case the distribution function of created particles follows the law f (t) similar to E-2 ( t). Two lessons for particle production in heavy-ion collisions are derived from this exercise. First: the shorter the (Sauter-type) pulse, the higher the residual density of produced particles. Second: although the Schwinger process in a string-type field produces a non-thermal particle spectrum, a Poissonian distribution of the (fluctuating) strings produces a thermal spectrum with an apparent temperature that coincides with the Hawking-Unruh temperature for the mean value of the string tension.
Описание
Ключевые слова
Цитирование
Blaschke, DB. Kinetic Approach to Pair Production in Strong Fields-Two Lessons for Applications to Heavy-Ion Collisions / Blaschke, DB, Juchnowski, L, Otto, A // PARTICLES. - 2019. - 2. - № 2. - P. 166-179. - 10.3390/particles2020012