Determination of the Space-Time Extension of Centrally Produced Hadronic Matter Using the Intensity Interferometer Technique inppInteractions at 28.5 GeV/c

Towards relativistic heavy ion collisions “by small steps towards the stars”

“…One should compare this result with rg = 1 fm in p + p collisions suggesting more extended sources are formed in nuclear collisions (Ezell, 1977). The result agrees surprisingly well with the coalescence model estimate at the end of lecture 2.…”

“…The limiting temperature of hadronic matter (T ** m^) may be reached in high energy heavy-ion collisions ) (as mentioned briefly in lecture 1) and may already have been observed in high energy hadron collisions (Laasanen, 1977). The ultimate hope is tht some unusual thermodynamic pro perty of matter at high baryon density might be used as a signal for new states of matter.…”

“…In this model the temperature limits at 140 MeV which may have been observed (Laasanen, 1977), a temperature approaching the limit reached in the earliest recognizable moments of our Universe (Weinberg, 1977). In the case of the nejtron stars (Baym, 1975) one is faced with the study of cold matter at super-nuclear densities, greater than 2.8 x 10^ gm/cm 3 .…”

Quark-gluon plasma formation in the central rapidity region and finite size effects of colliding nuclei

“…The increase of a~~ with E brings us to the increase of C through (21) and therefore of N(Y1'Y2). The rapidity density G also increase with E, although it has upper limit determined by B in (29). Moreover, the more the radii of colliding nuclei are contracted, the less the STEEP effect is.…”

“…The final section is devoted to the discussions and conclusions. Further, we will pay particular attention to the facts on N-N collisions that (a) the rapidity density and the inelastic cross section, a~~, markedly increase with the incident energy above TeV region [28J and (b) the correlation length of produced particles in rapidity space is 1-2 [29]. …”