On the role of the time scale Δt in Bose-Einstein correlations

Gideon Alexander*, Erez Reinherz-Aronis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The time scale parameter Δt, which appears in the Bose-Einstein Correlations (BEC) treated in terms of the Heisenberg uncertainty relations, is reexamined. Arguments are given for the role of Δt to be a measure of the particles' emission time rather than representing the strength property of the correlated particles. Thus in the analyses of the Z0 hadronic decays, the Δt given value of ∼ 10- 24 seconds, is the particles' emission time determined by the Z0 lifetime. In heavy ion collisions Δt measures the emission time of the particles produced in a nucleus of atomic number A. This emission time is shown here to be equal to Δ t = frac(mπ a2, ℏ c2) A2 / 3 that is, proportional to the nucleus surface area. This relation agrees rather well with the experimental Δt values deduced from the BEC analyses of heavy ion collisions.

Original languageEnglish
Pages (from-to)310-313
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4-5
StatePublished - 19 Apr 2010


  • Bose-Einstein correlations
  • Heavy ion collisions
  • Particle emission time


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