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1.	Adler, S. S., et al. (author) Transverse-energy distributions at midrapidity in p plus p, d plus Au, and Au plus Au collisions at root s(NN)=62.4-200 GeV and implications for particle-production models 2014 In: Physical Review C (Nuclear Physics). - 0556-2813. ; 89:4 Journal article (peer-reviewed)abstract Measurements of the midrapidity transverse-energy distribution, dE(T)/d eta, are presented for p + p, d+Au, and Au+Au collisions atv root s(NN) = 200 GeV and additionally for Au+Au collisions atv root s(NN) = 62.4 and 130 GeV. The dE(T)/d eta distributions are first compared with the number of nucleon participants N-part, number of binary collisions N-coll, and number of constituent-quark participants N-qp calculated from a Glauber model based on the nuclear geometry. For Au+Au, < dE(T)/d eta >/N-part increases with N-part, while < dE(T)/d eta >/N-qp is approximately constant for all three energies. This indicates that the two-component ansatz, dE(T)/d eta alpha (1 - x)N-part/2 + xN(coll), which was used to represent E-T distributions, is simply a proxy for N-qp, and that the N-coll term does not represent a hard-scattering component in E-T distributions. The dE(T)/d eta distributions of Au+Au and d+Au are then calculated from the measured p + p E-T distribution using two models that both reproduce the Au+Au data. However, while the number-of-constituent-quark-participant model agrees well with the d+Au data, the additive-quark model does not.

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Type of content: peer-reviewed (1)

Author/Editor: Silvermyr, D. (1); Gustafsson, Hans-Åke (1); Nystrand, Joakim (1); Oskarsson, Anders (1); Otterlund, Ingvar (1); Stenlund, Evert (1); show more...; Tydesjö, Henrik (1); Bauer, F. (1); Hill, J. C. (1); Jia, J. (1); Jinnouchi, O. (1); Leite, M. A. L. (1); Milov, A. (1); Nakamura, T. (1); Tojo, J. (1); Grau, N. (1); Isobe, T. (1); Lebedev, A. (1); Lim, H. (1); Thomas, T. L. (1); Bathe, S. (1); Boyle, K (1); Park, J (1); Cussonneau, J. P. (1); Aphecetche, L. (1); Averbeck, R. (1); Awes, T. C. (1); Baldisseri, A. (1); Berdnikov, Y. (1); Borel, H. (1); Buesching, H. (1); Chujo, T. (1); Constantin, P. (1); Delagrange, H. (1); Dubey, A. K. (1); Enokizono, A. (1); Espagnon, B. (1); Gadrat, S. (1); Germain, M. (1); Glenn, A. (1); Gunji, T. (1); Hamagaki, H. (1); Horaguchi, T. (1); Inaba, M. (1); Kang, J. H. (1); Khanzadeev, A. (1); Kim, D. J. (1); Klein-Boesing, C. (1); Kweon, M. J. (1); Kwon, Y. (1); show less...

University: Lund University (1)

Language: English (1)

Research subject (UKÄ/SCB): Natural sciences (1)

Year: 2014 (1)

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