Disappearance of back-to-back high-p(T) hadron correlations in central Au+Au collisions at root s(NN)=200 GeV

0185731 - UJF-V 20033032 RIV US eng J - Článek v odborném periodiku
Adler, C. - Ahammed, Z. - Allgower, C. - Amonett, J. - Anderson, B. D. - Anderson, M. - Averichev, G. S. - Šumbera, Michal - Zborovský, Imrich
Disappearance of back-to-back high-p(T) hadron correlations in central Au+Au collisions at root s(NN)=200 GeV.
Physical Review Letters. Roč. 90, č. 8 (2003), s. 082302. ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA MŠMT ME 475
Výzkumný záměr: CEZ:AV0Z1048901
Klíčová slova: large transverse-momentum * JET cross-section
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 7.035, rok: 2003

Azimuthal correlations for large transverse momentum charged hadrons have been measured over a wide pseudorapidity range and full azimuth in Au+Au and p+p collisions at roots(NN)=200 GeV. The small-angle correlations observed in p+p collisions and at all centralities of Au+Au collisions are characteristic of hard-scattering processes previously observed in high-energy collisions. A strong back-to-back correlation exists for p+p and peripheral Au+Au. In contrast, the back-to-back correlations are reduced considerably in the most central Au+Au collisions, indicating substantial interaction as the hard-scattered partons or their fragmentation products traverse the medium.
Trvalý link: http://hdl.handle.net/11104/0082114