Publication Date:
2011-08-19
Description:
Emulsion chambers were used to measure the transverse momenta of photons or pi(0) mesons produced in high-energy cosmic-ray nucleus-nucleus collisions. A group of events having large average transverse momenta has been found which apparently exceeds the expected limiting values. Analysis of the events at early interaction times, of the order of 1 fm/c, indicates that the observed transverse momentum increases with both rapidity density and energy density.
Keywords:
SPACE RADIATION
Type:
Physical Review Letters (ISSN 0031-9007); 57; 3249-325
Format:
text