0436940 - FZÚ 2015 RIV US eng J - Journal Article
Adare, A. - Afanasiev, S. - Aidala, C. - Tomášek, Lukáš - Tomášek, Michal - Vrba, Václav … Total 561 authors
Medium modification of jet fragmentation in Au plus Au collisions at root S-NN=200 GeV measured in direct photon-hadron correlations.
Physical Review Letters. Roč. 111, č. 3 (2013), "032301-1"-"032301-8". ISSN 0031-9007. E-ISSN 1079-7114
Institutional support: RVO:68378271
Keywords : quark-gluon plasma * phenix * collaboration * perspective * detector * TeV
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 7.728, year: 2013 ; AIS: 3.466, rok: 2013
DOI: https://doi.org/10.1103/PhysRevLett.111.032301

The jet fragmentation function is measured with direct photon-hadron correlations in p + p and Au + Au collisions at root S-NN = 200 GeV. The P-T of the photon is an excellent approximation to the initial P-T of the jet and the ratio Z(T) = P-T(h)/P-T(gamma) is used as a proxy for the jet fragmentation function. A statistical subtraction is used to extract the direct photon-hadron yields in Au + Au collisions while a photon isolation cut is applied in p + p. I-AA, the ratio of hadron yield opposite the photon in Au + Au to that in p + p, indicates modification of the jet fragmentation function. Suppression, most likely due to energy loss in the medium, is seen at high Z(T). The associated hadron yield at low Z(T) is enhanced at large angles. Such a trend is expected from redistribution of the lost energy into increased production of low-momentum particles.
Permanent Link: http://hdl.handle.net/11104/0240541