Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV

M. Eskef, D. Pelte, G. Goebels, E. Häfele, N. Herrmann, M. Korolija, Y. Leifels, H. Merlitz, S. Mohren, M. R. Stockmeier, M. Trzaska, J. P. Alard, A. Andronic, R. Averbeck, Z. Basrak, N. Bastid, I. Belyaev, D. Best, A. Buta, R. ČaplarN. Cindro, J. P. Coffin, P. Crochet, P. Dupieux, M. Dželalija, L. Fraysse, Z. Fodor, A. Genoux-Lubain, A. Gobbi, K. D. Hildenbrand, Byungsik Hong, F. Jundt, J. Kecskemeti, M. Kirejczyk, R. Kotte, R. Kutsche, A. Lebedev, V. Manko, J. Mösner, D. Moisa, W. Neubert, M. Petrovici, C. Pinkenburg, C. Plettner, P. Pras, F. Rami, V. Ramillien, W. Reisdorf, J. L. Ritman, B. De Schauenburg, D. Schüll, Z. Seres, B. Sikora, V. Simion, K. Siwek-Wilczynska, V. Smolyankin, M. A. Vasiliev, P. Wagner, G. S. Wang, K. Wisniewski, D. Wohlfarth, A. Zhilin

Research output: Contribution to journalArticle

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Abstract

The mass distributions of baryon resonances populated in near-central collisions of Au on Au and Ni on Ni are deduced by defolding the pt spectra of charged pions by a method which does not depend on a specific resonance shape. In addition the mass distributions of resonances are obtained from the invariant masses of (p,π±) pairs. With both methods the deduced mass distributions are shifted by an average value of -60 MeV/c2 relative to the mass distribution of the free Δ(1232) resonance, the distributions descent almost exponentially towards mass values of 2000 MeV/c2. The observed differences between (p,π-) and (p,π+) pairs indicate a contribution of isospin I = 1/2 resonances. The attempt to consistently describe the deduced mass distributions and the reconstructed kinetic energy spectra of the resonances leads to new insights about the freeze out conditions, i.e. to rather low temperatures and large expansion velocities.

Original languageEnglish
Pages (from-to)335-349
Number of pages15
JournalEuropean Physical Journal A
Volume3
Issue number4
Publication statusPublished - 1998 Dec 1

Fingerprint

baryon resonance
mass distribution
ionic collisions
energy
descent
energy spectra
pions
kinetic energy
collisions
expansion

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Eskef, M., Pelte, D., Goebels, G., Häfele, E., Herrmann, N., Korolija, M., ... Zhilin, A. (1998). Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV. European Physical Journal A, 3(4), 335-349.

Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV. / Eskef, M.; Pelte, D.; Goebels, G.; Häfele, E.; Herrmann, N.; Korolija, M.; Leifels, Y.; Merlitz, H.; Mohren, S.; Stockmeier, M. R.; Trzaska, M.; Alard, J. P.; Andronic, A.; Averbeck, R.; Basrak, Z.; Bastid, N.; Belyaev, I.; Best, D.; Buta, A.; Čaplar, R.; Cindro, N.; Coffin, J. P.; Crochet, P.; Dupieux, P.; Dželalija, M.; Fraysse, L.; Fodor, Z.; Genoux-Lubain, A.; Gobbi, A.; Hildenbrand, K. D.; Hong, Byungsik; Jundt, F.; Kecskemeti, J.; Kirejczyk, M.; Kotte, R.; Kutsche, R.; Lebedev, A.; Manko, V.; Mösner, J.; Moisa, D.; Neubert, W.; Petrovici, M.; Pinkenburg, C.; Plettner, C.; Pras, P.; Rami, F.; Ramillien, V.; Reisdorf, W.; Ritman, J. L.; De Schauenburg, B.; Schüll, D.; Seres, Z.; Sikora, B.; Simion, V.; Siwek-Wilczynska, K.; Smolyankin, V.; Vasiliev, M. A.; Wagner, P.; Wang, G. S.; Wisniewski, K.; Wohlfarth, D.; Zhilin, A.

In: European Physical Journal A, Vol. 3, No. 4, 01.12.1998, p. 335-349.

Research output: Contribution to journalArticle

Eskef, M, Pelte, D, Goebels, G, Häfele, E, Herrmann, N, Korolija, M, Leifels, Y, Merlitz, H, Mohren, S, Stockmeier, MR, Trzaska, M, Alard, JP, Andronic, A, Averbeck, R, Basrak, Z, Bastid, N, Belyaev, I, Best, D, Buta, A, Čaplar, R, Cindro, N, Coffin, JP, Crochet, P, Dupieux, P, Dželalija, M, Fraysse, L, Fodor, Z, Genoux-Lubain, A, Gobbi, A, Hildenbrand, KD, Hong, B, Jundt, F, Kecskemeti, J, Kirejczyk, M, Kotte, R, Kutsche, R, Lebedev, A, Manko, V, Mösner, J, Moisa, D, Neubert, W, Petrovici, M, Pinkenburg, C, Plettner, C, Pras, P, Rami, F, Ramillien, V, Reisdorf, W, Ritman, JL, De Schauenburg, B, Schüll, D, Seres, Z, Sikora, B, Simion, V, Siwek-Wilczynska, K, Smolyankin, V, Vasiliev, MA, Wagner, P, Wang, GS, Wisniewski, K, Wohlfarth, D & Zhilin, A 1998, 'Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV', European Physical Journal A, vol. 3, no. 4, pp. 335-349.
Eskef M, Pelte D, Goebels G, Häfele E, Herrmann N, Korolija M et al. Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV. European Physical Journal A. 1998 Dec 1;3(4):335-349.
Eskef, M. ; Pelte, D. ; Goebels, G. ; Häfele, E. ; Herrmann, N. ; Korolija, M. ; Leifels, Y. ; Merlitz, H. ; Mohren, S. ; Stockmeier, M. R. ; Trzaska, M. ; Alard, J. P. ; Andronic, A. ; Averbeck, R. ; Basrak, Z. ; Bastid, N. ; Belyaev, I. ; Best, D. ; Buta, A. ; Čaplar, R. ; Cindro, N. ; Coffin, J. P. ; Crochet, P. ; Dupieux, P. ; Dželalija, M. ; Fraysse, L. ; Fodor, Z. ; Genoux-Lubain, A. ; Gobbi, A. ; Hildenbrand, K. D. ; Hong, Byungsik ; Jundt, F. ; Kecskemeti, J. ; Kirejczyk, M. ; Kotte, R. ; Kutsche, R. ; Lebedev, A. ; Manko, V. ; Mösner, J. ; Moisa, D. ; Neubert, W. ; Petrovici, M. ; Pinkenburg, C. ; Plettner, C. ; Pras, P. ; Rami, F. ; Ramillien, V. ; Reisdorf, W. ; Ritman, J. L. ; De Schauenburg, B. ; Schüll, D. ; Seres, Z. ; Sikora, B. ; Simion, V. ; Siwek-Wilczynska, K. ; Smolyankin, V. ; Vasiliev, M. A. ; Wagner, P. ; Wang, G. S. ; Wisniewski, K. ; Wohlfarth, D. ; Zhilin, A. / Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV. In: European Physical Journal A. 1998 ; Vol. 3, No. 4. pp. 335-349.
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title = "Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV",
abstract = "The mass distributions of baryon resonances populated in near-central collisions of Au on Au and Ni on Ni are deduced by defolding the pt spectra of charged pions by a method which does not depend on a specific resonance shape. In addition the mass distributions of resonances are obtained from the invariant masses of (p,π±) pairs. With both methods the deduced mass distributions are shifted by an average value of -60 MeV/c2 relative to the mass distribution of the free Δ(1232) resonance, the distributions descent almost exponentially towards mass values of 2000 MeV/c2. The observed differences between (p,π-) and (p,π+) pairs indicate a contribution of isospin I = 1/2 resonances. The attempt to consistently describe the deduced mass distributions and the reconstructed kinetic energy spectra of the resonances leads to new insights about the freeze out conditions, i.e. to rather low temperatures and large expansion velocities.",
author = "M. Eskef and D. Pelte and G. Goebels and E. H{\"a}fele and N. Herrmann and M. Korolija and Y. Leifels and H. Merlitz and S. Mohren and Stockmeier, {M. R.} and M. Trzaska and Alard, {J. P.} and A. Andronic and R. Averbeck and Z. Basrak and N. Bastid and I. Belyaev and D. Best and A. Buta and R. Čaplar and N. Cindro and Coffin, {J. P.} and P. Crochet and P. Dupieux and M. Dželalija and L. Fraysse and Z. Fodor and A. Genoux-Lubain and A. Gobbi and Hildenbrand, {K. D.} and Byungsik Hong and F. Jundt and J. Kecskemeti and M. Kirejczyk and R. Kotte and R. Kutsche and A. Lebedev and V. Manko and J. M{\"o}sner and D. Moisa and W. Neubert and M. Petrovici and C. Pinkenburg and C. Plettner and P. Pras and F. Rami and V. Ramillien and W. Reisdorf and Ritman, {J. L.} and {De Schauenburg}, B. and D. Sch{\"u}ll and Z. Seres and B. Sikora and V. Simion and K. Siwek-Wilczynska and V. Smolyankin and Vasiliev, {M. A.} and P. Wagner and Wang, {G. S.} and K. Wisniewski and D. Wohlfarth and A. Zhilin",
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T1 - Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV

AU - Eskef, M.

AU - Pelte, D.

AU - Goebels, G.

AU - Häfele, E.

AU - Herrmann, N.

AU - Korolija, M.

AU - Leifels, Y.

AU - Merlitz, H.

AU - Mohren, S.

AU - Stockmeier, M. R.

AU - Trzaska, M.

AU - Alard, J. P.

AU - Andronic, A.

AU - Averbeck, R.

AU - Basrak, Z.

AU - Bastid, N.

AU - Belyaev, I.

AU - Best, D.

AU - Buta, A.

AU - Čaplar, R.

AU - Cindro, N.

AU - Coffin, J. P.

AU - Crochet, P.

AU - Dupieux, P.

AU - Dželalija, M.

AU - Fraysse, L.

AU - Fodor, Z.

AU - Genoux-Lubain, A.

AU - Gobbi, A.

AU - Hildenbrand, K. D.

AU - Hong, Byungsik

AU - Jundt, F.

AU - Kecskemeti, J.

AU - Kirejczyk, M.

AU - Kotte, R.

AU - Kutsche, R.

AU - Lebedev, A.

AU - Manko, V.

AU - Mösner, J.

AU - Moisa, D.

AU - Neubert, W.

AU - Petrovici, M.

AU - Pinkenburg, C.

AU - Plettner, C.

AU - Pras, P.

AU - Rami, F.

AU - Ramillien, V.

AU - Reisdorf, W.

AU - Ritman, J. L.

AU - De Schauenburg, B.

AU - Schüll, D.

AU - Seres, Z.

AU - Sikora, B.

AU - Simion, V.

AU - Siwek-Wilczynska, K.

AU - Smolyankin, V.

AU - Vasiliev, M. A.

AU - Wagner, P.

AU - Wang, G. S.

AU - Wisniewski, K.

AU - Wohlfarth, D.

AU - Zhilin, A.

PY - 1998/12/1

Y1 - 1998/12/1

N2 - The mass distributions of baryon resonances populated in near-central collisions of Au on Au and Ni on Ni are deduced by defolding the pt spectra of charged pions by a method which does not depend on a specific resonance shape. In addition the mass distributions of resonances are obtained from the invariant masses of (p,π±) pairs. With both methods the deduced mass distributions are shifted by an average value of -60 MeV/c2 relative to the mass distribution of the free Δ(1232) resonance, the distributions descent almost exponentially towards mass values of 2000 MeV/c2. The observed differences between (p,π-) and (p,π+) pairs indicate a contribution of isospin I = 1/2 resonances. The attempt to consistently describe the deduced mass distributions and the reconstructed kinetic energy spectra of the resonances leads to new insights about the freeze out conditions, i.e. to rather low temperatures and large expansion velocities.

AB - The mass distributions of baryon resonances populated in near-central collisions of Au on Au and Ni on Ni are deduced by defolding the pt spectra of charged pions by a method which does not depend on a specific resonance shape. In addition the mass distributions of resonances are obtained from the invariant masses of (p,π±) pairs. With both methods the deduced mass distributions are shifted by an average value of -60 MeV/c2 relative to the mass distribution of the free Δ(1232) resonance, the distributions descent almost exponentially towards mass values of 2000 MeV/c2. The observed differences between (p,π-) and (p,π+) pairs indicate a contribution of isospin I = 1/2 resonances. The attempt to consistently describe the deduced mass distributions and the reconstructed kinetic energy spectra of the resonances leads to new insights about the freeze out conditions, i.e. to rather low temperatures and large expansion velocities.

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