Centrality dependence of charged hadron transverse momentum spectra in d+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV

We have measured transverse momentum distributions of charged hadrons produced in d+Au collisions at sqrt(s_NN) = 200 GeV. The spectra were obtained for transverse momenta 0.25 < p_T < 6.0 GeV/c, in a pseudorapidity range of 0.2 < eta < 1.4 in the deuteron direction. The evolution of the...

Descripción completa

Detalles Bibliográficos
Autores principales: Back, B B, Baker, M D, Ballintijn, M, Barton, D S, Becker, B, Betts, R R, Bickley, A A, Bindel, R, Budzanowski, A, Busza, W, Carroll, A, Decowski, M P, García, E, Gburek, T, George, N, Gulbrandsen, K H, Gushue, S, Halliwell, C, Hamblen, J, Harrington, A S, Henderson, C, Hofman, D J, Hollis, R S, Holynski, R, Holzman, B, Iordanova, A, Johnson, E, Kane, J L, Khan, N, Kulinich, P A, Kuo, C M, Lee, J W, Lin, W T, Manly, S, Mignerey, A C, Nöll, A, Nouicer, R, Olszewski, A, Pak, R, Park, I C, Pernegger, H, Reed, C, Remsberg, L P, Roland, C, Roland, G, Sagerer, J, Sarin, P, Sawicki, P, Sedykh, I, Skulski, W, Smith, C E, Steinberg, P, Stephans, G S F, Sukhanov, A, Teng, R, Tonjes, M B, Trzupek, A, Vale, C, van Nieuwenhuizen, G J, Verdier, R, Veres, G I, Wadsworth, B, Wolfs, F L H, Wosiek, B, Wozniak, K, Wuosmaa, A H, Wyslouch, B, Zhang, J
Lenguaje:eng
Publicado: 2003
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.91.072302
http://cds.cern.ch/record/624334
Descripción
Sumario:We have measured transverse momentum distributions of charged hadrons produced in d+Au collisions at sqrt(s_NN) = 200 GeV. The spectra were obtained for transverse momenta 0.25 < p_T < 6.0 GeV/c, in a pseudorapidity range of 0.2 < eta < 1.4 in the deuteron direction. The evolution of the spectra with collision centrality is presented in comparison to p+pbarcollisions at the same collision energy. With increasing centrality, the yield at high transverse momenta increases more rapidly than the overall particle density, leading to a strong modification of the spectral shape. This change in spectral shape is qualitatively different from observations in Au+Au collisions at the same energy. The results provide important information for discriminating between different models for the suppression of high-p_T hadrons observed in Au+Au collisions.

Ejemplares similares