Transverse momentum dependence of η meson suppression in Au+Au collisions at √sNN=200 GeV

New measurements by the PHENIX experiment at the Relativistic Heavy Ion Collider for η production at midrapidity as a function of transverse momentum (pT) and collision centrality in √sNN=200 GeV Au+Au and p+p collisions are presented. They indicate nuclear modification factors (RAA) which are simil...

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Veröffentlicht in:	Physical review. C 2010-07, Vol.82 (1)
Hauptverfasser:	Adare, A., Afanasiev, S., Aidala, C., Ajitanand, N.N., Akiba, Y., Al-Bataineh, H., Alexander, J., Aoki, K., Aphecetche, Laurent, Aramaki, Y., Asai, J., Atomssa, E. T., Averbeck, R., C. Awes, T., Azmoun, B., Babintsev, V., Bai, M., Baksay, G., Baksay, L., Baldisseri, A., N. Barish, K., D. Barnes, P., Bassalleck, B., T. Basye, A., Bathe, S., Batsouli, S., Baublis, V., Baumann, Cédric, Bazilevsky, A., Belikov, S., Belmont, R., Bennett, R., Berdnikov, A., Berdnikov, Y., A. Bickley, A., G. Boissevain, J., S. Bok, J., Borel, H., Boyle, K., L. Brooks, M., Buesching, H., Bumazhnov, V., Bunce, G., Butsyk, S., Muñoz Camacho, C., Campbell, S., S. Chang, B., C. Chang, W., Charvet, J.-L., Chen, C.-H., Chernichenko, S., Y. Chi, C., Chiu, M., J. Choi, I., K. Choudhury, R., Christiansen, P., Chujo, T., Chung, P., Churyn, A., Chvala, O., Cianciolo, V., Citron, Z., A. Cole, B., Connors, M., Constantin, P., Csanád, M., Csörgő, T., Dahms, T., Dairaku, S., Danchev, I., Das, K., Datta, A., David, G., Denisov, A., d'Enterria, D., Deshpande, A., J. Desmond, E., Dietzsch, O., Dion, A., Donadelli, M., Drapier, O., Drees, A., A. Drees, K., K. Dubey, A., M. Durham, J., Durum, A., Dutta, D., Dzhordzhadze, V., Edwards, S., V. Efremenko, Y., Ellinghaus, F., Engelmore, T., Enokizono, A., En'Yo, H., Esumi, S., O. Eyser, K., Fadem, B., E. Fields, D., Finger, M., Fleuret, F.
Format:	Artikel
Sprache:	eng
Schlagworte:	GOLD IONS High Energy Physics - Experiment ION COLLISIONS MESONS MODIFICATIONS PARTICLE PRODUCTION Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PIONS NEUTRAL PROTON-PROTON INTERACTIONS relativistic heavy ion collider TRANSVERSE MOMENTUM
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Zusammenfassung:	New measurements by the PHENIX experiment at the Relativistic Heavy Ion Collider for η production at midrapidity as a function of transverse momentum (pT) and collision centrality in √sNN=200 GeV Au+Au and p+p collisions are presented. They indicate nuclear modification factors (RAA) which are similar in both magnitude and trend to those found in earlier π0 measurements. Linear fits to RAA as a function of pT in 5-20 GeV/c show that the slope is consistent with zero within two standard deviations at all centralities, although a slow rise cannot be excluded. Having different statistical and systematic uncertainties, the π0 and η measurements are complementary at high pT; thus, along with the extended pT range of these data they can provide additional constraints for theoretical modeling and the extraction of transport properties.
ISSN:	2469-9985 0556-2813 2469-9993 1089-490X
DOI:	10.1103/PhysRevC.82.011902