Pseudorapidity dependence of charged hadron transverse momentum spectra in d+Au collisions at √SNN=200 GeV

B. B. Back, M. D. Baker, M. Ballintijn, D. S. Barton, B. Becker, R. R. Betts, A. A. Bickley, R. Bindel, W. Busza, A. Carroll, M. P. Decowski, E. García, T. Gburek, N. George, K. Gulbrandsen, S. Gushue, C. Halliwell, J. Hamblen, A. S. Harrington, C. HendersonD. J. Hofman, R. S. Hollis, R. Hołyński, B. Holzman, A. Iordanova, E. Johnson, J. L. Kane, N. Khan, P. Kulinich, C. M. Kuo, J. W. Lee, W. T. Lin, S. Manly, A. C. Mignerey, R. Nouicer, A. Olszewski, R. Pak, I. C. Park, H. Pernegger, C. Reed, C. Roland, G. Roland, J. Sagerer, P. Sarin, I. Sedykh, W. Skulski, C. E. Smith, P. Steinberg, G. S.F. Stephans, A. Sukhanov, M. B. Tonjes, A. Trzupek, C. Vale, G. J. Van Nieuwenhuizen, R. Verdier, G. I. Veres, F. L.H. Wolfs, B. Wosiek, K. Woźniak, B. Wysłouch, J. Zhang

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We have measured the transverse momentum distributions of charged hadrons in d+Au collisions at √SNN =200 GeV in the range of 0.5<pT<4.0 GeV/c. The total range of pseudorapidity, η, is 0.2<η<1.4, where positive η is in the deuteron direction. The data has been divided into three regions of pseudorapidity, covering 0.2<η<0.6, 0.6<η<1.0, and 1.0<η<1.4, and has been compared to charged hadron spectra from p+p̄ collisions at the same energy. There is a significant change in the spectral shape as a function of pseudorapidity. As η increases we see a decrease in the nuclear modification factor RdAu.

Original languageEnglish
Article number061901
Pages (from-to)061901-1-061901-3
JournalPhysical Review C - Nuclear Physics
Issue number6
StatePublished - Dec 2004


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