About
Quantum statistics correlations are sensitive to the space-time size of the particle-emitting source as well as to the degree of quantum coherence in the final state.
Coherent pion radiation in high-energy collisions may arise, for instance, from the formation of a disoriented chiral condensate.The coherence of pions is expected to suppress Bose-Einstein correlations. The amount of suppression increases for higher order correlations. The comparison of 2-, 3-, and 4-pion correlations allows for a less ambiguous measure of the coherent fraction.
The coherent fractions extracted by ALICE are found to be non-zero in Pb-Pb collisions, which challenges the hydrodynamic descriptions of the collision.
We also present measurements of the source radii with 3-pion Bose-Einstein cumulants in pp, p-Pb, and Pb-Pb collisions. The resulting comparisons of the radii in all three systems at similar multiplicity has implications on the hydrodynamic modeling of high-energy collisions. .
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The talk
Credits and licence
- Institution
- CERN
- Department
- LHC Seminar
- Speaker
- Dhevan Raja Gangadharan
- Year
- 2014
- Language
- English
- Subjects
- Mathematics, Physics
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Tweens profiles and older, judged from what the source says about it. How courses are placed