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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:11 |
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Conference: Bucharest University Faculty of Physics 2004 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Investigation of the exotical clusters production
in Au-Au collisions at sqrt s_NN = 200 GeV
Authors:
Calin BESLIU* for the BRAHMS Collaboration
Affiliation:
* Atomic and Nuclear Physics Chair, Faculty of Physics,
University of Bucharest, ROMANIA
E-mail
Keywords:
BRAHMS Collaboration, Exotic clusters
Abstract:
Recent experimental signals on some exotic clusters (diquarks, pentaquarks and others) have been obtained (R.Jaffe, F.Wilczek arXiv:hep-ph/0307341 v4 oct 2003, H1 Experimet at HERA submited at Physics Letters B in March 2004, Yu.A.Troyan et al hep-ex/0404003). Taking into account the experimental results on some new phenomena oberved in Au-Au collisions at RHIC-BNL energies, we propose here an analysis of the formation of the exotic clusters using the experimental data obtained in the BRAHMS Experiment form RHIC-BNL.
The suppression of the hadronic resonsnces and the production of some exotic clusters or resonances (diquarks, dibaryons, pentaquarks) could be possible, taking into account the kaons and antiprotons abundances.
The experimental results obtained in Au-Au collisions at sqrt s_NN = 200 GeV using the BRAHMS experimental set-up indicate a very weak weight of the classical resonances (under 2% all). On the other hand, the analysis of the proton-proton, proton-antiproton, kaon-proton, proton-pion-pion combinations, in the final state, indicates the existence of some pentaquarks and meso-baryon states (I = 5/2). These very preliminary results are in agreement with the results mentioned previously.
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