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arXiv · 1712.07993

Centrality determination of Au+Au collisions at 1.23A GeV with HADES

HADES collaboration·J. Adamczewski-Musch·O. Arnold·C. Behnke·A. Belounnas·A. Belyaev·S. Chernenko·L. Chlad·C. Deveaux·J. Dreyer·A. Dybczak·E. Epple·L. Fabbietti·O. Fateev·P. Filip·P. Fonte·C. Franco·J. Friese·I. Froehlich·T. Galatyuk·J. A. Garzon·R. Gernhaeuser·M. Golubeva·R. Greifenhagen·F. Guber·M. Gumberidze·S. Harabasz·T. Heinz·T. Hennino·S. Hlavac·C. Hoehne·R. Holzmann·A. Ierusalimov·A. Ivashkin·B. Kaempfer·T. Karavicheva·B. Kardan·I. Koenig·W. Koenig·B. W. Kolb·G. Korcyl·G. Kornakov·R. Kotte·W. Kuehn·A. Kugler·T. Kunz·A. Kurepin·A. Kurilkin·P. Kurilkin·V. Ladygin·R. Lalik·K. Lapidus·A. Lebedev·L. Lopes·M. Lorenz·T. Mahmoud·L. Maier·A. Mangiarotti·J. Markert·S. Maurus·V. Metag·J. Michel·D. M. Mihaylov·S. Morozov·C. Muentz·R. Muenzer·L. Naumann·K. N. Nowakowski·M. Palka·Y. Parpottas·V. Pechenov·O. Pechenova·O. Petukhov·J. Pietraszko·W. Przygoda·S. Ramos·B. Ramstein·A. Reshetin·P. Rodriguez-Ramos·P. Rosier·A. Rost·A. Sadovsky·P. Salabura·T. Scheib·H. Schuldes·E. Schwab·F. Scozzi·F. Seck·P. Sellheim·J. Siebenson·L. Silva·Yu. G. Sobolev·S. Spataro·H. Stroebele·J. Stroth·P. Strzempek·C. Sturm·O. Svoboda·M. Szala·P. Tlusty
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Abstract

The centrality determination for Au+Au collisions at 1.23A GeV, as measured with HADES at the GSI-SIS18, is described. In order to extract collision geometry related quantities, such as the average impact parameter or number of participating nucleons, a Glauber Monte Carlo approach is employed. For the application of this model to collisions at this relatively low centre-of-mass energy of $\sqrt{s_{\mathrm{NN}}} = 2.42$ GeV special investigations were performed. As a result a well defined procedure to determine centrality classes for ongoing analyses of heavy-ion data is established.

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HADES collaboration, J. Adamczewski-Musch, O. Arnold, C. Behnke, A. Belounnas, A. Belyaev, S. Chernenko, L. Chlad, C. Deveaux, J. Dreyer, A. Dybczak, E. Epple, L. Fabbietti, O. Fateev, P. Filip, P. Fonte, C. Franco, J. Friese, I. Froehlich, T. Galatyuk, J. A. Garzon, R. Gernhaeuser, M. Golubeva, R. Greifenhagen, F. Guber, M. Gumberidze, S. Harabasz, T. Heinz, T. Hennino, S. Hlavac, C. Hoehne, R. Holzmann, A. Ierusalimov, A. Ivashkin, B. Kaempfer, T. Karavicheva, B. Kardan, I. Koenig, W. Koenig, B. W. Kolb, G. Korcyl, G. Kornakov, R. Kotte, W. Kuehn, A. Kugler, T. Kunz, A. Kurepin, A. Kurilkin, P. Kurilkin, V. Ladygin, R. Lalik, K. Lapidus, A. Lebedev, L. Lopes, M. Lorenz, T. Mahmoud, L. Maier, A. Mangiarotti, J. Markert, S. Maurus, V. Metag, J. Michel, D. M. Mihaylov, S. Morozov, C. Muentz, R. Muenzer, L. Naumann, K. N. Nowakowski, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, O. Petukhov, J. Pietraszko, W. Przygoda, S. Ramos, B. Ramstein, A. Reshetin, P. Rodriguez-Ramos, P. Rosier, A. Rost, A. Sadovsky, P. Salabura, T. Scheib, H. Schuldes, E. Schwab, F. Scozzi, F. Seck, P. Sellheim, J. Siebenson, L. Silva, Yu. G. Sobolev, S. Spataro, H. Stroebele, J. Stroth, P. Strzempek, C. Sturm, O. Svoboda, M. Szala, P. Tlusty. 2017-12-21. Centrality determination of Au+Au collisions at 1.23A GeV with HADES. https://doi.org/10.1140/epja/i2018-12513-7

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