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20 April 2024

» arxiv » nucl-ex/9706001

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Abundance of Delta Resonances in 58Ni+58Ni Collisions between 1 and 2 AGeV
FOPI Collaboration: B.Hong ; N.Herrmann ; J.L.Ritman ; D.Best ; A.Gobbi ; K.D.Hildenbrand ; M.Kirejczyk ; Y.Leifels ; C.Pinkenburg ; W.Reisdorf ; D.Schuell ; U.Sodan ; G.S.Wang ; T.Wienold ; J.P.Alard ; V.Amouroux ; N.Bastid ; I.Belyaev ; G.Berek ; J.Biegansky ; A.Buta ; J.P.Coffin ; P.Crochet ; R.Dona ; P.Dupieux ; M.Eskef ; P.Fintz ; Z.Fodor ; L.Fraysse ; A.Genoux-Lubain ; G.Goebels ; G.Guillaume ; E.Haefele ; F.Jundt ; J.Kecskemeti ; M.Korolija ; R.Kotte ; C.Kuhn ; A.Lebedev ; I.Legrand ; C.Maazouzi ; V.Manko ; J.Moesner ; S.Mohren ; W.Neubert ; D.Pelte ; M.Petrovici ; P.Pras ; F.Rami ; C.Roy ; Z.Seres ; B.Sikora ; V.Simion ; K.Siwek-Wilczynska ; A.Somov ; L.Tizniti ; M.Trzaska ; M.A.Vasiliev ; P.Wagner ; D.Wohlfarth ; A.Zhilin ;
Date:	4 Jun 1997
Journal:	Phys.Lett. B407 (1997) 115-120
Subject:	nucl-ex
Abstract:	Charged pion spectra measured in 58Ni-58Ni collisions at 1.06, 1.45 and 1.93 AGeV are interpreted in terms of a thermal model including the decay of Delta resonances. The transverse momentum spectra of pions are well reproduced by adding the pions originating from the Delta-resonance decay to the component of thermal pions, deduced from the high transverse momentum part of the pion spectra. About 10 and 18% of the nucleons are excited to Delta states at freeze-out for beam energies of 1 and 2 AGeV, respectively.
Source:	arXiv, nucl-ex/9706001
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