T. Anticic, Latchezar Betev, Anja Billmeier, Roland Bramm, Peter Dinkelaker, Marek Gazdzicki, Thorsten Kollegger, Christine Meurer, Michael Kosta Mitrovski, Rainer Ernst Arno Renfordt, Reinhard Stock, Herbert Ströbele, Alexander Albert Wetzler, Jacek Zaranek, et al., NA49 Collaboration
The transverse mass mt distributions for deuterons and protons are measured in Pb+Pb reactions near midrapidity and in the range 0<mt–m<1.0 (1.5) GeV/c2 for minimum bias collisions at 158A GeV and for central collisions
The transverse mass mt distributions for deuterons and protons are measured in Pb+Pb reactions near midrapidity and in the range 0<mt–m<1.0 (1.5) GeV/c2 for minimum bias collisions at 158A GeV and for central collisions at 40 and 80 A GeV beam energies. The rapidity density dn/dy, inverse slope parameter T and mean transverse mass <mt> derived from mt distributions as well as the coalescence parameter B2 are studied as a function of the incident energy and the collision centrality. The deuteron mt spectra are significantly harder than those of protons, especially in central collisions. The coalescence factor B2 shows three systematic trends. First, it decreases strongly with increasing centrality reflecting an enlargement of the deuteron coalescence volume in central Pb+Pb collisions. Second, it increases with mt. Finally, B2 shows an increase with decreasing incident beam energy even within the SPS energy range. The results are discussed and compared to the predictions of models that include the collective expansion of the source created in Pb+Pb collisions.
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MetadatenAuthor: | T. Anticic, Latchezar Betev, Anja Billmeier, Roland Bramm, Peter Dinkelaker, Marek Gazdzicki, Thorsten Kollegger, Christine Meurer, Michael Kosta Mitrovski, Rainer Ernst Arno Renfordt, Reinhard Stock, Herbert Ströbele, Alexander Albert Wetzler, Jacek Zaranek, et al., NA49 Collaboration |
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URN: | urn:nbn:de:hebis:30-16264 |
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Document Type: | Article |
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Language: | English |
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Date of Publication (online): | 2005/09/26 |
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Year of first Publication: | 2004 |
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Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
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Release Date: | 2005/09/26 |
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Source: | Published in Phys.Rev.C69:024902,2004, ©2004 The American Physical Society, http://link.aps.org/abstract/PRC/v69/p024902 |
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HeBIS PPN: | 191510963 |
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Institutes: | Physik |
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Dewey Decimal Classification: | 530 Physik |
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Sammlungen: | Universitätspublikationen |
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Licence (German): | Veröffentlichungsvertrag für Publikationen |
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