Transverse momentum and centrality dependence of dihadron correlations in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV: Jet-quenching and the response of partonic matter

Transverse momentum and centrality dependence of dihadron correlations in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV: Jet-quenching and the response of partonic matter

Azimuthal angle \Delta\phi correlations are presented for charged hadrons from dijets for 0.4 < p_T < 10 GeV/c in Au+Au collisions at sqrt(s_NN) = 200 GeV. With increasing p_T, the away-side distribution evolves from a broad to a concave shape, then to a convex shape. Comparisons to p+p data s...

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Veröffentlicht in:Physical review. C 2008, Vol.77
Hauptverfasser: Adare, A., Afanasiev, S., Aidala, C., Ajitanand, N.N., Akiba, Y., Al-Bataineh, H., Alexander, J., Al-Jamel, A., Aoki, K., Aphecetche, Laurent, Armendariz, R., Aronson, S.H., Asai, J., Atomssa, E. T., Averbeck, R., Awes, T.C., Azmoun, B., Babintsev, V., Baksay, G., Baksay, L., Baldisseri, A., Barish, K.N., Barnes, P.D., Bassalleck, B., Bathe, S., Batsouli, S., Baublis, V., Bauer, F., Bazilevsky, A., Belikov, S., Bennett, R., Berdnikov, Y., Bickley, A.A., Bjorndal, M.T., Boissevain, J.G., Borel, H., Boyle, K., Brooks, M.L., Brown, D.S., Bucher, D., Buesching, H., Bumazhnov, V., Bunce, G., Burward-Hoy, J.M., Butsyk, S., Campbell, S., Chai, J.-S., Chang, B.S., Charvet, J.-L., Chernichenko, S., Chiba, J., Chi, C.Y., Chiu, M., Choi, I.J., Chujo, T., Chung, P., Churyn, A., Cianciolo, V., Cleven, C.R., Cobigo, Y., Cole, B.A., Comets, M.P., Constantin, P., Csanad, M., Csorgo, T., Dahms, T., Das, K., David, G., Deaton, M.B., Dehmelt, K., Delagrange, H., Denisov, A., d'Enterria, D., Deshpande, A., Desmond, E.J., Dietzsch, O., Dion, A., Donadelli, M., Drachenberg, J.L., Drapier, O., Drees, A., Dubey, A.K., Durum, A., Dzhordzhadze, V., Efremenko, Y.V., Egdemir, J., Ellinghaus, F., Emam, W.S., Enokizono, A., En'Yo, H., Espagnon, B., Esumi, S., Eyser, K.O., Fields, D.E., Finger, M., Fleuret, F., Fokin, S.L., Forestier, B., Fraenkel, Z., Frantz, J.E.
Format: Artikel
Sprache:eng
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Nuclear Experiment
Physics
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Zusammenfassung:Azimuthal angle \Delta\phi correlations are presented for charged hadrons from dijets for 0.4 < p_T < 10 GeV/c in Au+Au collisions at sqrt(s_NN) = 200 GeV. With increasing p_T, the away-side distribution evolves from a broad to a concave shape, then to a convex shape. Comparisons to p+p data suggest that the away-side can be divided into a partially suppressed "head" region centered at Delta\phi ~ \pi, and an enhanced "shoulder" region centered at Delta\phi ~ \pi +/- 1.1. The p_T spectrum for the "head" region softens toward central collisions, consistent with the onset of jet quenching. The spectral slope for the "shoulder" region is independent of centrality and trigger p_T, which offers constraints on energy transport mechanisms and suggests that the "shoulder" region contains the medium response to energetic jets.
ISSN:2469-9985
2469-9993
DOI:10.1103/PhysRevC.77.011901