Search for DCC in relativistic heavy-ion collision through event shape analysis

Event shape analysis has been used to look for DCC signals in simulated ult ra-relativistic heavy-ion collision data at SPS energy. A simple redistribu tion of particles, with two detectors to detect charged particles and photo ns, is seen to result in the same flow direction with the flow angle differ ence peaking at zero. However, events where the neutral pion fraction has b een modified according to the DCC probability distribution, show the flow a ngles in two detectors to be almost 90 degrees apart. The results presented here show that the technique is complementary to the one based on the disc rete wavelet transformation. Together the techniques are seen to provide a very powerful tool for DCC search in ultra relativistic heavy ion collision . (C) 1999 Published by Elsevier Science B.V. All rights reserved.