The dependence of the emission size on the hadron mass

Gideon Alexander*, Iuliana Cohen, Eugene Levin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


The size of the emission volume of pions and kaons, rππ and rKK, were measured in the hadronic Z0 decays through the two-pion and two-kaon Bose-Einstein correlations near threshold. Recently the emitter size of the two identical baryons, ΛΛ(Λ + ̄Λ + ̄), was evaluated from the dependence of the fraction of the spin S = 1 state on the energy near threshold where it is affected by the Pauli exclusion principle. Here we show that the r dependence on the particle masses, namely the hierarchy rππ> rKK > rΛΛ observed in the Z0 hadronic decays, is well described in terms of the Heisenberg uncertainty principle. A good description can also be obtained via the virial theorem when applied to a general QCD potential. Other available approaches are also discussed.

Original languageEnglish
Pages (from-to)159-166
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
StatePublished - 1999


  • Bose and Fermi correlations
  • Emission radius
  • Hadron mass
  • QCD
  • Uncertainty principle


Dive into the research topics of 'The dependence of the emission size on the hadron mass'. Together they form a unique fingerprint.

Cite this