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2. SiΛvio: A trigger for Λ-hyperons

Author

Münzer, Robert, Berger, Martin, Fabbietti, Laura, Averbeck, R., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M.L., Buehler, P., Cargnelli, M., Čaplar, R., Carevic, I., Charviakova, V., Crochet, P., Deppner, I., Dupieux, P., Dželalija, M., Fodor, Z., Gasik, P., Gašparić, I., Grishkin, Y., Hartmann, O.N., Herrmann, N., Hildenbrand, K.D., Hong, B., Kang, T.I., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Kiš, M., Kienle, P., Koczon, P., Kotte, R., Lebedev, A., Leifels, Y., Liu, J.L., Lopez, X., Manko, V., Marton, J., Matulewicz, T., Petrovici, M., Piasecki, K., Rami, F., Reischl, A., Reisdorf, W., Ryu, M.S., Schmidt, P., Schüttauf, A., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Suzuki, K., Tyminski, Z., Wagner, P., Widmann, E., Wiśniewski, K., Xiao, Z.G., Yamazaki, T., Yushmanov, I., Zhang, X.Y., Zhilin, A., Zinyuk, V., and Zmeskal, J.

Published
2014
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3. Strange meson production in Al+Al collisions at 1.9 A GeV

Author

Gasik, P., Piasecki, K., Herrmann, N., Leifels, Y., Matulewicz, T., Andronic, A., Averbeck, R., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Berger, M., Buehler, P., Cargnelli, M., Čaplar, R., Crochet, P., Czerwiakowa, O., Deppner, I., Dupieux, P., Dželalija, M., Fabbietti, L., Fodor, Z., Gašparić, I., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Kiš, M., Koczon, P., Kotte, R., Lebedev, A., Le Fèvre, A., Liu, J. L., Lopez, X., Manko, V., Marton, J., Münzer, R., Petrovici, M., Rami, F., Reischl, A., Reisdorf, W., Ryu, M. S., Schmidt, P., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Suzuki, K., Tymiński, Z., Wagner, P., Weber, I., Widmann, E., Wiśniewski, K., Xiao, Z. G., Yushmanov, I., Zhang, Y., Zhilin, A., Zinyuk, V., and Zmeskal, J.

Published
2016
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4. Systematics of azimuthal asymmetries in heavy ion collisions in the [formula omitted] regime

Author

Reisdorf, W., Leifels, Y., Andronic, A., Averbeck, R., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M.L., Čaplar, R., Crochet, P., Dupieux, P., Dželalija, M., Fodor, Z., Gasik, P., Grishkin, Y., Hartmann, O.N., Herrmann, N., Hildenbrand, K.D., Hong, B., Kang, T.I., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Kiš, M., Koczoń, P., Korolija, M., Kotte, R., Kress, T., Lebedev, A., Lopez, X., Matulewicz, T., Merschmeyer, M., Neubert, W., Petrovici, M., Piasecki, K., Rami, F., Ryu, M.S., Schüttauf, A., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Stockmeier, M., Stoicea, G., Tymiński, Z., Wiśniewski, K., Wohlfarth, D., Xiao, Z.G., Xu, H.S., Yushmanov, I., and Zhilin, A.

Published
2012
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5. Systematics of central heavy ion collisions in the [formula omitted] regime

Author

Reisdorf, W., Andronic, A., Averbeck, R., Benabderrahmane, M.L., Hartmann, O.N., Herrmann, N., Hildenbrand, K.D., Kang, T.I., Kim, Y.J., Kiš, M., Koczoń, P., Kress, T., Leifels, Y., Merschmeyer, M., Piasecki, K., Schüttauf, A., Stockmeier, M., Barret, V., Basrak, Z., Bastid, N., Čaplar, R., Crochet, P., Dupieux, P., Dželalija, M., Fodor, Z., Gasik, P., Grishkin, Y., Hong, B., Kecskemeti, J., Kirejczyk, M., Korolija, M., Kotte, R., Lebedev, A., Lopez, X., Matulewicz, T., Neubert, W., Petrovici, M., Rami, F., Ryu, M.S., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Stoicea, G., Tymiński, Z., Wiśniewski, K., Wohlfarth, D., Xiao, Z.G., Xu, H.S., Yushmanov, I., and Zhilin, A.

Published
2010
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6. Can the neutron-capture cross sections be measured with Coulomb dissociation?

Author

Horváth, Á., Ieki, K., Kiss, Á., Galonsky, A., Thoennessen, M., Baumann, T., Bazin, D., Bertulani, C. A., Bordeanu, C., Carlin, N., Csanád, M., Deák, F., DeYoung, P., Frank, N., Fukuchi, T., Fülöp, Zs., Gade, A., Galaviz, D., Hoffman, C., Izsák, R., Peters, W. A., Schelin, H., Schiller, A., Sugo, R., Seres, Z., and Veres, G. I.

Published
2006
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7. Systematics of pion emission in heavy ion collisions in the [formula omitted] regime

Author

Reisdorf, W., Stockmeier, M., Andronic, A., Benabderrahmane, M.L., Hartmann, O.N., Herrmann, N., Hildenbrand, K.D., Kim, Y.J., Kiš, M., Koczoń, P., Kress, T., Leifels, Y., Lopez, X., Merschmeyer, M., Schüttauf, A., Barret, V., Basrak, Z., Bastid, N., Čaplar, R., Crochet, P., Dupieux, P., Dželalija, M., Fodor, Z., Grishkin, Y., Hong, B., Kang, T.I., Kecskemeti, J., Kirejczyk, M., Korolija, M., Kotte, R., Lebedev, A., Matulewicz, T., Neubert, W., Petrovici, M., Rami, F., Ryu, M.S., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Stoicea, G., Tymiński, Z., Wiśniewski, K., Wohlfarth, D., Xiao, Z.G., Xu, H.S., Yushmanov, I., and Zhilin, A.

Published
2007
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8. Two-proton small-angle correlations in central heavy-ion collisions: A beam-energy- and system-size-dependent study

Author

Kotte, R., Alard, J. P., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Čaplar, R., Cordier, E., Crochet, P., Dupieux, P., Dželalija, M., Fodor, Z., Gašparić, I., Gobbi, A., Grishkin, Y., Hartmann, O. N., Herrmann, N., Hildenbrand, K. D., Hong, B., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Koczon, P., Korolija, M., Kress, T., Lebedev, A., Leifels, Y., Lopez, X., Merschmeyer, M., Mösner, J., Neubert, W., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., de Schauenburg, B., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Stoicea, G., Tyminski, Z., Wagner, P., Wiśniewski, K., Wohlfarth, D., Xiao, Z. G., Yushmanov, Y., and Zhilin, A.

Published
2005
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10. Direct comparison of phase-space distributions of K- and K+ mesons in heavy-ion collisions at SIS energies -- evidence for in-medium modifications of kaons?

Author

Wiśniewski, K., Crochet, P., Herrmann, N., Andronic, A., Averbeck, R., Devismes, A., Finck, C., Gobbi, A., Hartmann, O., Hildenbrand, K.D., Koczon, P., Kress, T., Kutsche, R., Leifels, Y., Reisdorf, W., Schüll, D., Alard, J.P., Barret, V., Basrak, Z., Bastid, N., Belyaev, I., Bendarag, A., Berek, G., Čaplar, R., Cindro, N., Dupieux, P., Dželalija, M., Eskef, M., Fodor, Z., Grishkin, Y., Hong, B., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Korolija, M., Kotte, R., Kowalczyk, M., Lebedev, A., Lee, K.S., Manko, V., Merlitz, H., Mohren, S., Moisa, D., Neubert, W., Nianine, A., Pelte, D., Petrovici, M., Plettner, C., Rami, F., de Schauenburg, B., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Somov, A., Stockmeier, M., Stoicea, G., Vasiliev, M., Wagner, P., Wohlfarth, D., Yang, J.T., Yushmanov, I., Zhilin, A., and The FOPI Collaboration

Published
2000
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11. On the space-time difference of proton and composite particle emission in central heavy-ion reactions at 400 A· MeV

Author

Kotte, R., Barz, H. W., Neubert, W., Plettner, C., Wohlfarth, D., Alard, J.P., Andronic, A., Averbeck, R., Basrak, Z., Bastid, N., Bendarag, N., Berek, G., Čaplar, R., Cindro, N., Crochet, P., Devismes, A., Dupieux, P., Dželalija, M., Eskef, M., Fodor, Z., Gobbi, A., Grishkin, Y., Herrmann, N., Hildenbrand, K.D., Hong, B., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Korolija, M., Kowalczyk, M., Kress, T., Kutsche, R., Lebedev, A., Lee, K.S., Leifels, Y., Manko, V., Merlitz, H., Moisa, D., Nianine, A., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., de Schauenburg, B., Schüll, D., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczyńska, K., Somov, A., Stoicea, G., Vasiliev, M.A., Wagner, P., Wiśniewski, K., Yang, J.T., Yushmanov, Y., Zhilin, A., and The FOPI Collaboration

Published
1999
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12. Identification of baryon resonances in central heavy-ion collisions at energies between 1 and 2 AGeV: FOPI Collaboration

Author

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, 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, 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., and Zhilin, A.

Published
1998
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13. Charged pion production in Au on Au collisions at 1 AGeV The FOPI Collaboration

Author

Pelte, D., Häfele, E., Best, D., Goebels, G., Herrmann, N., Pinkenburg, C., Reisdorf, W., Trzaska, M., Alard, J. P., Amouroux, V., Andronic, A., Basrak, Z., Bastid, N., Belyaev, I., Biegansky, J., Buta, A., Čaplar, R., Cindro, N., Coffin, J. P., Crochet, P., Dupieux, P., Dżelalija, M., Erö, J., Eskef, M., Fintz, P., Fodor, Z., Genoux-Lubain, A., Gobbi, A., Guillaume, G., Hildenbrand, K. D., Hong, B., Jundt, F., Kecskemeti, J., Kirejczyk, M., Koncz, P., Korolija, M., Korchagin, Y., Kotte, R., Kuhn, C., Lambrecht, D., Lebedev, A., Legrand, I., Leifels, Y., Manko, V., Merlitz, H., Mösner, J., Mohren, S., Moisa, D., Neubert, W., Petrovici, M., Pras, P., Rami, F., Ramillien, V., Ritman, J. L., Roy, C., Schüll, D., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Sodan, U., Vasiliev, M. A., Wagner, P., Wang, G. S., Wienold, T., Wohlfarth, D., and Zhilin, A.

Published
1997
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14. Shape of collective flow in highly central Au(150 A MeV)+Au collisions

Author

Roy, C., Kuhn, C., Coffin, J. P., Crochet, P., Fintz, P., Guillaume, G., Jundt, F., Maazouzi, C., Rami, F., Tizniti, L., Wagner, P., Alard, J. P., Amouroux, V., Basrak, Z., Bastid, N., Belyaev, I., Best, D., Biegansky, J., Buta, A., Čaplar, R., Cindro, N., Donà, R., Dupieux, P., Dzelalija, M., Fan, Z. G., Fodor, Z., Fraysse, L., Gobbi, A., Herrmann, N., Hildenbrand, K. D., Hölbling, S., Hong, B., Jeong, S. C., Kecskemeti, J., Kirejczyk, M., Koncz, P., Korchagin, Y., Kotte, R., Lebedev, A., Legrand, I., Leifels, Y., Manko, V., Mgebrishvili, G., Moisa, D., Mösner, J., Neubert, W., Pelte, D., Petrovici, M., Pinkenburg, C., Pras, P., Reisdorf, W., Ritman, J. L., Sadchikov, A. G., Schüll, D., Seres, Z., Sikora, B., Simion, V., Smolyankin, V., Sodan, U., Trzaska, M., Vasiliev, M., Wang, G. S., Wessels, J. P., Wienold, T., Wohlfarth, D., Zhilin, A., Konopka, J., and Stöcker, H.

Published
1997
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16. Wide-acceptance measurement of the K−/K+ ratio from Ni+Ni collisions at 1.91A GeV

Author

Piasecki, K., Herrmann, N., Averbeck, R., Andronic, A., Barret, V., Basrak, Zoran, Bastid, N., Benabderrahmane, M. L., Berger, M., Buehler, P., Cargnelli, M., Čaplar, Roman, Cordier, E., Crochet, P., Czerwiakowa, O., Deppner, I., Dupieux, P., Dželalija, Mile, Fabbietti, L., Fodor, Z., Gasik, P., Gašparić, Igor, Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Kiš, Mladen, Koczon, P., Korolija, Milorad, Kotte, R., Lebedev, A., Leifels, Y., Le Fèvre, A., Liu, J. L., Lopez, X., Mangiarotti, A., Manko, V., Marton, J., Matulewicz, T., Merschmeyer, M., Münzer, R., Pelte, D., Petrovici, M., Rami, F., Reischl, A., Reisdorf, W., Ryu, M. S., Schmidt, P., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Stoicea, G., Suzuki, K., Tymiński, Z., Wagner, P., Weber, Ivana, Widmann, E., Wiśniewski, K., Xiao, Z. G., Xu, H. S., Yushmanov, I., Zhang, Y., Zhilin, A., Zinyuk, V., Zmeskal, J., and FOPI Collaboration

Subjects
Nuclear Theory, High Energy Physics::Experiment, heavy-ion collisions, charged kaons, in-medium, strange particles, Nuclear Experiment
Abstract

The FOPI Collaboration at the GSI SIS-18 synchrotron measured charged kaons from central and semicentral collisions of Ni+Ni at a beam energy of 1.91A GeV. We present the distribution of the K−/K+ ratio on the energy vs polar angle plane in the nucleon-nucleon center-of-mass frame, with and without subtraction of the contribution of ϕ(1020) meson decays to the K− yield. The acceptance of the current experiment is substantially wider compared to the previous measurement of the same colliding system. The ratio of K− to K+ energy spectra is expected to be sensitive to the in-medium modifications of basic kaon properties like mass. Recent results obtained by the HADES Collaboration at 1.23A and 1.76A GeV indicate that after inclusion of the ϕ meson decay contribution to the K− production no difference between the slopes of the K− and K+ energy spectra is observed within uncertainties. For our data a linear fit to this ratio obtained after subtraction of the ϕ meson contribution still shows a decrease with kinetic energy, although a constant value cannot be rejected. The contribution of Λ(1520)→pK− decays estimated from fitting the thermal model to the experimental yields appears to be another factor of moderate relevance.

Published
2019
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17. Wide acceptance measurement of the K$^-$/K$^+$ ratio from Ni+Ni collisions at 1.91A GeV

Author

Piasecki, K., Herrmann, N., Averbeck, R., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Berger, M., Buehler, P., Cargnelli, M., ��aplar, R., Cordier, E., Crochet, P., Czerwiakowa, O., Deppner, I., Dupieux, P., D��elalija, M., Fabbietti, L., Fodor, Z., Gasik, P., Ga��pari��, I., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Ki��, M., Koczon, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., F��vre, A. Le, Liu, J. L., Lopez, X., Mangiarotti, A., Manko, V., Marton, J., Matulewicz, T., Merschmeyer, M., M��nzer, R., Pelte, D., Petrovici, M., Rami, F., Reischl, A., Reisdorf, W., Ryu, M. S., Schmidt, P., Sch��ttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczy��ska, K., Smolyankin, V., Stoicea, G., Suzuki, K., Tymi��ski, Z., Wagner, P., Weber, I., Widmann, E., Wi��niewski, K., Xiao, Z. G., Xu, H. S., Yushmanov, I., Zhang, Y., Zhilin, A., Zinyuk, V., Zmeskal, J., Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), FOPI, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne (UCA)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
energy: kinetic, Nuclear Theory, FOS: Physical sciences, Relativistic Nuclear Collisions, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], beam: energy, Automatic Keywords, meson: decay, nucleon nucleon, HADES, 1.91 GeV/nucleon, 25.75.Dw, K: spectrum, synchrotron, slope, FOPI, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Phi(1020): decay, Nuclear Experiment, 13.60.Le, yield: ratio, acceptance, experimental results
Abstract

The FOPI Collaboration at the GSI SIS-18 synchrotron measured charged kaons from central and semi-central collisions of Ni+Ni at a beam energy of 1.91A GeV. We present the distribution of the K$^-$\K$^+$ ratio on the energy vs polar angle plane in the nucleon-nucleon center-of-mass frame, with and without subtraction of the contribution of $\phi$(1020) meson decays to the K$^-$ yield. The acceptance of the current experiment is substantially wider compared to the previous measurement of the same colliding system. The ratio of K$^-$ to K$^+$ energy spectra is expected to be sensitive to the in-medium modifications of basic kaon properties like mass. Recent results obtained by the HADES Collaboration at 1.23A and 1.76A GeV indicate that after inclusion of the $\phi$ meson decay contribution to the K$^-$ production no difference between the slopes of the K$^-$ and K$^+$ energy spectra is observed within uncertainties. For our data a linear fit to this ratio obtained after subtraction of the $\phi$ meson contribution still shows a decrease with kinetic energy, although a constant value cannot be rejected. The contribution of $\Lambda(1520) \rightarrow p\text{K}^-$ decays estimated from fitting the thermal model to the experimental yields appears to be another factor of moderate relevance., Comment: 8 pages, 4 figures, 2 tables (1 appendix table)

Published
2019
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18. Shape parameters of the participant source in Ru + Ru collisions at [formula omitted]

Author

Bastid, N., Dupieux, P., Bendarag, A., Barret, V., Crochet, P., Lopez, X., Alard, J.P., Andronic, A., Basrak, Z., Benabderrahmane, M.L., Čaplar, R., Cordier, E., Dželalija, M., Fodor, Z., Gašparić, I., Gobbi, A., Grishkin, Y., Hartmann, O.N., Herrmann, N., Hildenbrand, K.D., Hong, B., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Koczon, P., Korolija, M., Kotte, R., Kress, T., Lebedev, A., Leifels, Y., Mangiarotti, A., Manko, V., Merschmeyer, M., Moisa, D., Neubert, W., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., de Schauenburg, B., Schuettauf, A., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczyńska, K., Smolarkiewicz, M.M., Smolyankin, V., Soliwoda, I.J., Stockmeier, M.R., Stoicea, G., Tyminski, Z., Wagner, P., Wiśniewski, K., Wohlfarth, D., Xiao, Z., Yushmanov, I., and Zhilin, A.

Published
2004
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20. Determination of N* amplitudes from associated strangeness production in p+p collisions

Author

Münzer, R., Fabbietti, L., Epple, E., Lu, S., Klose, P., Hauenstein, F., Herrmann, N., Grzonka, D., Leifels, Y., Maggiora, M., Pleiner, D., Ramstein, B., Ritman, J., Roderburg, E., Salabura, P., Sarantsev, A., Basrak, Z., Buehler, P., Cargnelli, M., Čaplar, R., Clement, H., Czerwiakowa, O., Deppner, I., Dželalija, M., Eyrich, W., Fodor, Z., Gasik, P., Gašparić, I., Gillitzer, A., Grishkin, Y., Hartmann, O.N., Hildenbrand, K.D., Hong, B., Kang, T.I., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Kiš, M., Koczon, P., Kotte, R., Lebedev, A., Le Fèvre, A., Liu, J.L., Manko, V., Marton, J., Matulewicz, T., Piasecki, K., Rami, F., Reischl, A., Ryu, M.S., Schmidt, P., Seres, Z., Sikora, B., Sim, K.S., Siwek-Wilczyńska, K., Smolyankin, V., Suzuki, K., Tymiński, Z., Wagner, P., Weber, I., Widmann, E., Wiśniewski, K., Xiao, Z.G., Yamasaki, T., Yushmanov, I., Wintz, P., Zhang, Y., Zhilin, A., Zinyuk, V., and Zmeskal, J.

Published
2018
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21. Determination of $N^{\ast }$ amplitudes from associated strangeness production in p+p collisions

Author

Münzer, R., Fabbietti, L., Epple, E., Lu, S., Klose, P., Hauenstein, F., Herrmann, N., Grzonka, D., Leifels, Y., Maggiora, M., Pleiner, D., Ramstein, B., Ritman, J., Roderburg, E., Salabura, Piotr, Sarantsev, A., Basrak, Z., Buehler, P., Cargnelli, M., Čaplar, R., Clement, H., Czerwiakowa, O., Deppner, I., Dželalija, M., Eyrich, W., Fodor, Z., Gasik, P., Gašparić, I., Gillitzer, A., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T.I., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Kiš, M., Koczon, P., Kotte, R., Lebedev, A., Le Fèvre, A., Liu, J. L., Manko, V., Marton, J., Matulewicz, T., Piasecki, K., Rami, F., Reischl, A., Ryu, M. S., Schmidt, P., Seres, Z., Sikora, B., Sim, K. S., Siwek-Wilczyńska, K., Smolyankin, V., Suzuki, K., Tymiński, Z., Wagner, P., Weber, I., Widmann, E., Wiśniewski, K., Xiao, Z. G., Yamasaki, T., Yushmanov, I., Wintz, P., Zhang, Y., Zhilin, A., Zinyuk, V., and Zmeskal, J.

Subjects
hyperon–nucleon interaction, hadrons, strangeness, resonance, scattering length, partial wave analysis
Published
2018

22. On the transverse momentum distribution of strange hadrons produced in relativistic heavy ion collisions

Author

Ritman, J. L., Herrmann, N., Best, D., Alard, J. P., Amouroux, V., Bastid, N., Belyaev, I., Berger, L., Biegansky, J., Buta, A., Čaplar, R., Cindro, N., Coffin, J. P., Crochet, P., Dona, R., Dupieux, P., Dzelalija, M., Fintz, P., Fodor, Z., Genoux-Lubain, A., Gobbi, A., Goebels, G., Guillaume, G., Grigorian, Y., Häfele, E., Hildenbrand, K. D., Hölbling, S., Jundt, F., Kecskemeti, J., Kirejczyk, M., Korchagin, Y., Kotte, R., Kuhn, C., Lambrecht, D., Lebedev, A., Legrand, I., Leifels, Y., Maazouzi, C., Manko, V., Matulewicz, T., Mösner, J., Mohren, S., Moisa, D., Neubert, W., Pelte, D., Petrovici, M., Pinkenburg, C., Rami, F., Ramillien, V., Reisdorf, W., Roy, C., Schüll, D., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Sodan, U., Tizniti, L., Trzaska, M., Vasiliev, M. A., Wagner, P., Wang, G. S., Wienold, T., Wohlfarth, D., Zhilin, A., and The FOPI Collaboration

Published
1995
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23. Neutron yields from 155 MeV/nucleon carbon and helium stopping in aluminum

Author

Heilbronn, L, Cary, R. S, Cronqvist, M, Deak, F, Frankel, K, Galonsky, A, Holabird, K, Horvath, A, Kiss, A, Kruse, J, Ronningen, R. M, Schelin, H, Seres, Z, Stronach, C. E, Wang, J, Zecher, P, Zeitlin, C, and Miller, J

Subjects
Nuclear Physics
Abstract

Neutron fluences have been measured from 155 MeV/nucleon 4He and 12C ions stopping in an Al target at laboratory angles between 10 and 160 deg. The resultant spectra were integrated over angle and energy above 10 MeV to produce total neutron yields. Comparison of the two systems shows that approximately two times as many neutrons are produced from 155 MeV/nucleon 4He stopping in Al and 155 MeV/nucleon 12C stopping in Al. Using an energy-dependent geometric cross-section formula to calculate the expected number of primary nuclear interactions shows that the 12C + Al system has, within uncertainties, the same number of neutrons per interaction (0.99 +/- 0.03) as does the 4He + Al system (1.02 +/- 0.04), despite the fact that 12C has three times as many neutrons as does 4He. Energy and angular distributions for both systems are also reported. No major differences can be seen between the two systems in those distributions, except for the overall magnitude. Where possible, the 4He + Al spectra are compared with previously measured spectra from 160 and 177.5 MeV/nucleon 4He interactions in a variety of stopping targets. The reported spectra are consistent with previously measured spectra. The data were acquired to provide data applicable to problems dealing with the determination of the radiation risk to humans engaged in long-term missions in space; however, the data are also of interest for issues related to the determination of the radiation environment in high-altitude flight, with shielding at high-energy heavy-ion accelerators and with doses delivered outside tumor sites treated with high-energy hadronic beams.

Published
1999

24. Flow angle from intermediate mass fragment measurements

Author

Rami, F., Crochet, P., Donà, R., de Schauenburg, B., Wagner, P., Alard, J.P., Andronic, A., Basrak, Z., Bastid, N., Belyaev, I., Bendarag, A., Berek, G., Best, D., Čaplar, R., Devismes, A., Dupieux, P., Dželalija, M., Eskef, M., Fodor, Z., Gobbi, A., Grishkin, Y., Herrmann, N., Hildenbrand, K.D., Hong, B., Kecskemeti, J., Kirejczyk, M., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Merlitz, H., Mohren, S., Moisa, D., Neubert, W., Pelte, D., Petrovici, M., Pinkenburg, C., Plettner, C., Reisdorf, W., Schüll, D., Seres, Z., Sikora, B., Simion, V., Siwek-Wilczyńska, K., Stoicea, G., Stockmeir, M., Vasiliev, M., Wisniewski, K., Wohlfarth, D., Yushmanov, I., and Zhilin, A.

Published
1999
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25. Centrality dependence of subthreshold φ meson production in Ni+Ni collisions at 1.9A GeV

Author

Piasecki, K., Tyminski, Z., Herrmann, N., Averbeck, R., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Berger, M., Buehler, P., Cargnelli, M., Caplar, R., Cordier, E., Crochet, P., Czerwiakowa, O., Deppner, I., Dupieux, P., Dzelalija, M., Fabbietti, L., Fodor, Z., Gasik, P., Gasparic, I., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Kis, M., Koczon, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Le Fevre, A., Liu, J. L., Lopez, X., Mangiarotti, A., Manko, V., Marton, J., Matulewicz, T., Merschmeyer, M., Münzer, R., Pelte, D., Petrovici, M., Rami, F., Reischl, A., Reisdorf, W., Ryu, M. S., Schmidt, P., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stoicea, G., Suzuki, K., Wagner, P., Weber, I., Widmann, E., Wisniewski, K., Xiao, Z. G., Xu, H. S., Yushmanov, I., Zhang, Y., Zhilin, A., Zinyuk, V., and Zmeskal, J.

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

We analysed the φ meson production in central Ni+Ni collisions at the beam kinetic energy of 1.93A GeV with the FOPI spectrometer and found the production probability per event of [8.6 +- 0.9 (stat) +- 1.5 (syst)] x 10-4. This new data point allows for the first time to inspect the centrality dependence of the subthreshold φ meson production in heavy-ion collisions. The rise of φ meson multiplicity per event with mean number of participants can be parametrized by the power function with exponent α = 1.6 +- 0.5. The ratio of φ to K- production yields seems not to depend within the experimental uncertainties on the collision centrality, and the average of measured values was found to be 0.37 +- 0.05.

Published
2016

26. Azimuthal Emission Patterns of $K^{+}$ and of $ K^{-} $ Mesons in Ni + Ni Collisions near the Strangeness Production Threshold

Author

Zinyuk, V., Kang, T. I., Leifels, Y., Herrmann, N., Hong, B., Averbeck, R., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Berger, M., Buehler, P., Cargnelli, M., Čaplar, R., Carevic, I., Crochet, P., Deppner, I., Dupieux, P., Dželalija, M., Fabbietti, L., Fodor, Z., Gasik, P., Gašparić, I., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Kiš, M., Koczon, P., Kotte, R., Lebedev, A., Le Fèvre, A., Liu, J. L., Lopez, X., Manko, V., Marton, J., Matulewicz, T., Münzer, R., Petrovici, M., Piasecki, K., Rami, F., Reischl, A., Reisdorf, W., Ryu, M. S., Schmidt, P., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Suzuki, K., Tyminski, Z., Wagner, P., Widmann, E., Wiśniewski, K., Xiao, Z. G., Yushmanov, I., Zhang, Y., Zhilin, A., Zmeskal, J., Bratkovskaya, E., Hartnack, Christoph, Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), FOPI, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

6 pages; Azimuthal emission patterns of $K^\pm$ mesons have been measured in Ni + Ni collisions with the FOPI spectrometer at a beam kinetic energy of 1.91 A GeV. The transverse momentum $p_{T}$ integrated directed and elliptic flow of $K^{+}$ and $K^{-}$ mesons as well as the centrality dependence of $p_{T}$ - differential directed flow of $K^{+}$ mesons are compared to the predictions of HSD and IQMD transport models. The data exhibits different propagation patterns of $K^{+}$ and $K^{-}$ mesons in the compressed and heated nuclear medium and favor the existence of a kaon-nucleon in-medium potential, repulsive for $K^{+}$ mesons and attractive for $K^{-}$ mesons.

Published
2014
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27. Influence of ϕ mesons on negative kaons in Ni+Ni collisions at 1.91A GeV beam energy

Author

Piasecki, K., Herrmann, N., Averbeck, R., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Berger, M., Buehler, P., Cargnelli, M., Čaplar, R., Crochet, P., Czerwiakowa, O., Deppner, I., Dupieux, P., Dželalija, M., Fabbietti, L., Fodor, Z., Gasik, P., Gašparić, I., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Kiš, M., Koczon, P., Kotte, R., Lebedev, A., Leifels, Y., Le Fèvre, A., Liu, J. L., Lopez, X., Manko, V., Marton, J., Matulewicz, T., Münzer, R., Petrovici, M., Rami, F., Reischl, A., Reisdorf, W., Ryu, M. S., Schmidt, P., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Suzuki, K., Tymiński, Z., Wagner, P., Weber, I., Widmann, E., Wiśniewski, K., Xiao, Z. G., Yushmanov, I., Zhang, Y., Zhilin, A., Zinyuk, V., and Zmeskal, J.

Subjects
Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

ϕ and K− mesons from Ni+Ni collisions at the beam energy of 1.91A GeV have been measured by the FOPI spectrometer, with a trigger selecting central and semi-central events amounting to 51% of the total cross section. The phase space distributions, and the total yield of K−, as well as the kinetic energy distribution and the total yield of ϕ mesons are presented. The ϕ\K− ratio is found to be 0.44±0.07(stat)+0.18−0.12(syst), meaning that about 22% of K− mesons originate from the decays of ϕ mesons, occurring mostly in vacuum. The inverse slopes of direct kaons are up to about 15 MeV larger than the ones extracted within the one-source model, signalling that a considerable share of gap between the slopes of K+ and K− could be explained by the contribution of ϕ mesons to negative kaons.

Published
2014

28. Azimuthal Emission Patterns of K+ and of K- Mesons in Ni+Ni Collisions near the Strangeness Production Threshold

Author

Zinyuk, V., Kang, T. I., Leifels, Y., Herrmann, N., Hong, B., Averbeck, R., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Berger, M., Buehler, P., Cargnelli, M., Čaplar, R., Carevic, I., Crochet, P., Deppner, I., Dupieux, P., Dželalija, M., Fabbietti, L., Fodor, Z., Gasik, P., Gašparić, I., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Kiš, M., Koczon, P., Kotte, R., Lebedev, A., Le Fèvre, A., Liu, J. L., Lopez, X., Manko, V., Marton, J., Matulewicz, T., Münzer, R., Petrovici, M., Piasecki, K., Rami, F., Reischl, A., Reisdorf, W., Ryu, M. S., Schmidt, P., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Suzuki, K., Tyminski, Z., Wagner, P., Widmann, E., Wiśniewski, K., Xiao, Z. G., Yushmanov, I., Zhang, Y., Zhilin, A., Zmeskal, J., Bratkovskaya, E., and Hartnack, C.

Subjects
High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Azimuthal emission patterns of K ± mesons have been measured in Ni + Ni collisions with the FOPI spectrometer at a beam kinetic energy of 1.91 A GeV. The transverse momentum p T integrated directed and elliptic flow of K + and K − mesons as well as the centrality dependence of p T - differential directed flow of K + mesons are compared to the predictions of hadron string dynamics and isospin quantum molecular dynamics transport models. The data exhibits different propagation patterns of K + and K − mesons in the compressed and heated nuclear medium and favor the existence of a kaon-nucleon in-medium potential, repulsive for K + mesons and attractive for K − mesons.

Published
2014

29. Azimuthal emission patterns of K+ and of K- mesons in Ni plus Ni collisions near the strangeness production threshold

Author

Zinyuk, V., Kang, T.I., Leifels, Y., Herrmann, N., Hong, B., Averbeck, R., Andronic, A., Barret, V., Basrak, Zoran, Bastid, N., Benabderrahmane, M.L., Berger, M., Buehler, P., Cargnelli, M., Čaplar, Roman, Carević, Ivana, Crochet, P., Deppner, I., Dupieux, P., Dželalija, Mile, Fabbietti, L., Fodor, Z., Gasik, P., Gašparić, Igor, Grishkin, Y., Hartmann, O. N., Hildenbrand, K.D., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Kiš, Mladen, Koczon, P., Kotte, R., Lebedev, A., Le Fevre, A., Liu, J.L., Lopez, X., Manko, V., Marton, J., Matulewicz, T., Munzer, R., Petrovici, M., Piasecki, K., Rami, F., Reischl, A., Reisdorf, W., Ryu, M.S., Schmidt, P., Schuttauf, A., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczynka, K., Smolyankin, V., Suzuki, K., Tyminski, Z., Wagner, P., Widmann, E., Wisniewski, K., Xiao, Z.G., Yushmanov, I, Zhang, Y, Zhilin, A, and Zmeskal, J.

Subjects
High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment, heavy-ion collisions, relativistic nuclear collisions, equation-of-state, antikaon production, kaon production, dense nuclear, sis energies, matter, flow, dynamics
Abstract

Azimuthal emission patterns of K+/- mesons have been measured in Ni + Ni collisions with the FOPI spectrometer at a beam kinetic energy of 1.91 A GeV. The transverse momentum p(T) integrated directed and elliptic flow of K+ and K- mesons as well as the centrality dependence of p(T) - differential directed flow of K+ mesons are compared to the predictions of hadron string dynamics and isospin quantum molecular dynamics transport models. The data exhibits different propagation patterns of K+ and K- mesons in the compressed and heated nuclear medium and favor the existence of a kaon-nucleon in-medium potential, repulsive for K+ mesons and attractive for K- mesons.

Published
2014
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30. Determining the 7Li(n,gamma) cross section via Coulomb dissociation of 8Li

Author

Izsak, R, Horvath, A, Kiss, A, Seres, Z, Galonsky, A, Bertulani, C A, Fulop, Zs, Baumann, T, Bazin, D, Ieki, K, Bordeanu, C, Carlin, N, Csanad, M, Deak, F, DeYoung, P, Frank, N, Fukuchi, T, Gade, A, Galaviz, D, Hoffman, C R, Peters, W A, Schelin, H, Thoennessen, M, and Veres, G I

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, FOS: Physical sciences, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), nucl-ex, Nuclear Experiment
Abstract

The applicability of Coulomb dissociation reactions to determine the cross section for the inverse neutron capture reaction was explored using the reaction 8Li(gamma,n)7Li. A 69.5 MeV/nucleon 8Li beam was incident on a Pb target, and the outgoing neutron and 7Li nucleus were measured in coincidence. The deduced (n,gamma) excitation function is consistent with data for the direct capture reaction 7Li(n,gamma)8Li and with low-energy effective field theory calculations., Accepted for publication in Phys. Rev. C

Published
2013

35. Systematics of azimuthal asymmetries in heavy ion collisions in the 1A GeV regime

Author

Reisdorf, W., Leifels, Y., Andronić, A., Averbeck, R., Barret, V., Basrak, Zoran, Bastid, N., Benabderrahmane, M. L., Čaplar, Roman, Crochet, P., Dupieux, P., Dželalija, Mile, Fodor, Z., Gasik, P., Grishkin, Y., Hartmann, O.N., Herrmann, N., Hildenbrand, K. D., Hong, B., Kang, T.I., Kecskemeti, J., Kim, Y.J., Kirejczyk, M., Kiš, Mladen, Koczon, P., Korolija, Milorad, Kotte, R., Kress, T., Lebedev, A., Lopez, X., Matulewicz, T., Merschmeyer, M., Neubert, W., Petrovici, M., Piasecki, K., Rami, F., Ryu, M.S., Schuttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stockmeier, M., Stoicea, G., Tyminski, Z, Wisniewski, K., Wohlfarth, D., Xiao, Z.G., Xu, H.S., Yushmanov, I., and Zhilin, A.

Subjects
nuclear physics, heavy-ions, directed and elliptic flow
Abstract

Using the large acceptance apparatus FOPI, we study central and semi-central collisions in the reactions (energies in A GeV are given in parentheses): (40)Ca + (40)Ca (0.4, 0.6, 0.8, 1.0, 1.5, 1.93), (58)Ni + (58)Ni (0.15, 0.25, 0.4), (96)Ru + (96)Ru (0.4. 1.0, 1.5), (96)Zr + (96)Zr (0.4, 1.0. 1.5), (129)Xe + CsI (0.15, 0.25, 0.4). (197)Au + (197)Au (0.09, 0.12, 0.15, 0.25, 0.4, 0.6, 0.8, 1.0, 1.2, 1.5). The observables include directed and elliptic flow. The data are compared to earlier data where possible and to transport model simulations. A stiff nuclear equation of state is found to be incompatible with the data. Evidence for extra-repulsion of neutrons in compressed asymmetric matter is found.

Published
2012

36. Systematics of azimuthal asymmetries in heavy ion collisions in the 1 A GeV regime

Author

Reisdorf, W., Leifels, Y., Andronic, A., Averbeck, R., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Caplar, R., Crochet, P., Dupieux, P., Dzelalija, M., Fodor, Z., Gasik, P., Grishkin, Y., Hartmann, O. N., Herrmann, N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Kis, M., Koczon, P., Korolija, M., Kotte, R., Kress, T., Lebedev, A., Lopez, X., Matulewicz, T., Merschmeyer, M., Neubert, W., Petrovici, M., Piasecki, K., Rami, F., Ryu, M. S., Schuettauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stockmeier, M., Stoicea, G., Tyminski, Z., Wisniewski, K., Wohlfarth, D., Xiao, Z. G., Xu, H. S., Yushmanov, I., and Zhilin, A.

Abstract

Using the large acceptance apparatus FOPI, we study central and semi-central collisions in the reactions (energies in A GeV are given in parentheses): 40Ca+40Ca (0.4, 0.6, 0.8, 1.0, 1.5, 1.93), 58Ni+58Ni (0.15, 0.25, 0.4), 96Ru+96Ru (0.4, 1.0, 1.5), 96Zr+96Zr (0.4, 1.0, 1.5), 129Xe+CsI (0.15, 0.25, 0.4), 197Au+197Au (0.09, 0.12, 0.15, 0.25, 0.4, 0.6, 0.8, 1.0, 1.2, 1.5). The observables include directed and elliptic flow. The data are compared to earlier data where possible and to transport model simulations. A stiff nuclear equation of state is found to be incompatible with the data. Evidence for extra-repulsion of neutrons in compressed asymmetric matter is found.

Published
2012

37. Systematics of azimuthal asymmetries in heavy ion collisions in the 1 A GeV regime

Author

FOPI Collaboration, Reisdorf, W., Leifels, Y., Andronic, A., Averbeck, R., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Caplar, R., Crochet, P., Dupieux, P., Dzelalija, M., Fodor, Z., Gasik, P., Grishkin, Y., Hartmann, O. N., Herrmann, N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Kis, M., Koczon, P., Korolija, M., Kotte, R., Kress, T., Lebedev, A., Lopez, X., Matulewicz, T., Merschmeyer, M., Neubert, W., Petrovici, M., Piasecki, K., Rami, F., Ryu, M. S., Schuettauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stockmeier, M., Stoicea, G., Tyminski, Z., Wisniewski, K., Wohlfarth, D., Xiao, Z. G., Xu, H. S., Yushmanov, I., and Zhilin, A.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

Using the large acceptance apparatus FOPI, we study central and semi-central collisions in the reactions (energies in A GeV are given in parentheses): 40Ca+40Ca (0.4, 0.6, 0.8, 1.0, 1.5, 1.93), 58Ni+58Ni (0.15, 0.25, 0.4), 96Ru+96Ru (0.4, 1.0, 1.5), 96Zr+96Zr (0.4, 1.0, 1.5), 129Xe+CsI (0.15, 0.25, 0.4), 197Au+197Au (0.09, 0.12, 0.15, 0.25, 0.4, 0.6, 0.8, 1.0, 1.2, 1.5). The observables include directed and elliptic flow. The data are compared to earlier data where possible and to transport model simulations. A stiff nuclear equation of state is found to be incompatible with the data. Evidence for extra-repulsion of neutrons in compressed asymmetric matter is found., 70 pages, 52 figures; accepted for publication in Nuclear Physics A

Published
2011

38. Measurement of $K^*(892)^0$ and $K^0$ mesons in Al+Al collisions at 1.9$A$ GeV

Author

Lopez, X., Herrmann, N., Piasecki, K., Andronic, A., Barret, V., Basrak, Z., Bastid, N., L. Benabderrahmane, M., Buehler, P., Cargnelli, M., Čaplar, R., Crochet, P., Dupieux, P., Dželalija, M., Fabbietti, L., Fijał-Kirejczyk, I., Fodor, Z., Gasik, P., Gašparić, I., Grishkin, Y., N. Hartmann, O., D. Hildenbrand, K., Hong, B., I. Kang, T., Kecskemeti, J., Kirejczyk, M., J. Kim, Y., Kiš, M., Koczon, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Manko, V., Marton, J., Matulewicz, T., Merschmeyer, M., Neubert, W., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., S. Ryu, M., Schmidt, P., Schüttauf, A., Seres, Z., Sikora, B., S. Sim, K., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Suzuki, K., Tyminski, Z., Wagner, P., Widmann, E., Wiśniewski, K., G. Xiao, Z., Yushmanov, I., Y. Zhang, X., Zhilin, A., Zmeskal, J., Kienle, P., Yamazaki, T., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and FOPI

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

New measurement of sub-threshold $K^*(892)^0$ and $K^0$ production is presented. The experimental data complete the measurement of strange particles produced in Al+Al collisions at 1.9$A$ GeV measured with the FOPI detector at SIS/GSI. The $K^*(892)^0$ / $K^0$ yield ratio is found to be $0.0315\pm 0.006 (\mathrm{stat.})\pm 0.012 (\mathrm{syst.})$ and is in good agreement with the UrQMD model prediction. These measurements provide information on in-medium cross section of $K^+$ - $\pi^-$ fusion which is the dominant process on sub-threshold $K^*(892)^0$ production., Comment: 5 pages, 4 figures, accepted for publication in Phys. Rev. C

Published
2010
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39. Measurement of K*(892)0 and K0 mesons in Al+Al collisions at 1.9A GeV

Author

Lopez, X., Herrmann, N., Piasecki, K., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Buehler, P., Cargnelli, M., Caplar, R., Crochet, P., Dupieux, P., Dzelalija, M., Fabbietti, L., Fijal-Kirejczyk, I., Fodor, Z., Gasik, P., Gasparic, I., Grishkin, Y., Hartmann, O., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kirejczyk, M., Kim, Y. J., Kis, M., Koczon, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Manko, V., Marton, J., Matulewicz, T., Merschmeyer, M., Neubert, W., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., Ryu, M. S., Schmidt, P., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Suzuki, K., Tyminski, Z., Wagner, P., Widmann, E., Wisniewski, K., Xiao, Z. G., Yushmanov, I., Zhang, X. Y., Zhilin, A., Zmeskal, J., Kienle, P., and Yamazaki, T.

Abstract

A new measurement of subthreshold K∗(892)0 and K0 production is presented. The experimental data complete the measurement of strange particles produced in Al + Al collisions at 1.9AGeV measured with the FOPI detector at SIS at GSI (Darmstadt). The K∗(892)0/K0 yield ratio is found to be 0.0315 ± 0.006(stat.) ± 0.012(syst.) and is in good agreement with the transport model prediction. These measurements provide information on the in-medium cross section of K+-π− fusion, which is the dominant process in subthreshold K∗(892)0 production.

Published
2010

40. Measurement of K*(892)(0) and K-0 mesons in Al plus Al collisions at 1.9A GeV

Author

Lopez, X., Herrmann, N., Piasecki, K., Andronić, A., Barret, V., Basrak, Zoran, Bastid, N., Benabderrahmane, M. L., Buehler, P., Cargnelli, M., Čaplar, Roman, Crochet, P., Dupieux, P., Dželalija, Mile, Fabbietti, L., Fijal-Kirejczyk, I., Fodor, Z., Gasik, P., Gašparić, Igor, Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kirejczyk, M., Kim, Y. J., Kiš, Mladen, Koczon, P., Korolija, Milorad, Kotte, R., Lebedev, A., Leifels, Y., Manko, V., Marton, J., Matulewicz, T., Merschmeyer, M., Neubert, W., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., Ryu, M., Schmidt, P., Schuettauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Suzuki, K., Tyminski, Z., Wagner, P., Widmann, E., Wisniewski, K., Xiao, Z. G., Yushmanov, I., Zhang, X. Y., Zhilin, A., Zmeskal, J., Kienle, P., and Yamazaki, T.

Subjects
heavy-ion collisions, k+ mesons, dynamics, flow
Abstract

A new measurement of subthreshold K*(892)(0) and K-0 production is presented. The experimental data complete the measurement of strange particles produced in Al + Al collisions at 1.9A GeV measured with the FOPI detector at SIS at GSI (Darmstadt). The K*(892)(0)/K-0 yield ratio is found to be 0.0315 +/- 0.006(stat.) +/- 0.012(syst.) and is in good agreement with the transport model prediction. These measurements provide information on the in-medium cross section of K+-pi(-) fusion, which is the dominant process in subthreshold K*(892)(0) production.

Published
2010

41. Systematics of central heavy ion collisions in the 1A GeV regime

Author

Andronic, A., Averbeck, R., Benabderrahmane, M.L., Hartmann, O.N., Herrmann, N., Hildenbrand, K.D., Kang, T.I., Kim, Y.J., Kiš, M., Koczoń, P., Kress, T., Leifels, Y., Merschmeyer, M., Piasecki, K., Schüttauf, A., Stockmeier, M., Barret, V., Basrak, Z., Bastid, N., Čaplar, R., Crochet, P., Dupieux, P., Dželalija, M., Fodor, Z., Gasik, P., Grishkin, Y., Hong, B., Kecskemeti, J., Kirejczyk, M., Korolija, M., Kotte, R., Lebedev, A., Lopez, X., Matulewicz, T., Neubert, W., Petrovici, M., Rami, F., Ryu, M.S., Seres, Z., Sikora, B., Sim, K.S., Simion, V., Siwek-Wilczyńska, K., Smolyankin, V., Stoicea, G., Tymiński, Z., Wiśniewski, K., Wohlfarth, D., Xiao, Z.G., Xu, H.S., Yushmanov, I., Zhilin, A., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and FOPI

Subjects
Stopping, Viscosity, Nuclear equation of state, Cluster production, Isospin, Rapidity, heavy ion, rapidity, stopping, viscosity, radial flow, cluster production, nucleosynthesis, nuclear equation of state, isospin, Radial flow, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nucleosynthesis, Heavy ions
Abstract

Using the large acceptance apparatus FOPI, we study central collisions in the reactions (energies in A GeV are given in parentheses): 40Ca + 40Ca (0.4, 0.6, 0.8, 1.0, 1.5, 1.93), 58Ni + 58Ni (0.15, 0.25, 0.4), 96Ru + 96Ru (0.4, 1.0, 1.5), 96Zr + 96Zr (0.4, 1.0, 1.5), 129Xe + CsI (0.15, 0.25, 0.4), 197Au + 197Au (0.09, 0.12, 0.15, 0.25, 0.4, 0.6, 0.8, 1.0, 1.2, 1.5). The observables include cluster multiplicities, longitudinal and transverse rapidity distributions and stopping, and radial flow. The data are compared to earlier data where possible and to transport model simulations.

Published
2010
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42. Measurement of the in-medium K0 inclusive cross section in pi- -induced reactions at 1.15 GeV/c

Author

Benabderrahmane, M. L., Herrmann, N., Wisniewski, K., Kecskemeti, J., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Buehler, P., Cargnelli, M., Caplar, R., Cordier, E., Deppner, I., Crochet, P., Dupieux, P., Dzelalija, M., Fabbietti, L., Fodor, Z., Gasik, P., Gasparic, I., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kienle, P., Kirejczyk, M., Kim, Y. J., Kis, M., Koczon, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Lopez, X., Manko, V., Marton, J., Mangiarotti, A., Merschmeyer, M., Matulewicz, T., Petrovici, M., Piasecki, K., Rami, F., Reischl, A., Reisdorf, W., Ryu, M. S., Schmidt, P., Schuttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Suzuki, K., Tyminski, Z., Widmann, E., Xiao, Z. G., Yamazaki, T., Yushmanov, I., Zhang, X. Y., Zhilin, A., Zmeskal, J., Bratkovskaya, E., Cassing, W., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and FOPI

Subjects
Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The K0 meson production by pi- mesons of 1.15 GeV/c momentum on C, Al, Cu, Sn and Pb nuclear targets was measured with the FOPI spectrometer at the SIS accelerator of GSI. Inclusive production cross-sections and the momentum distributions of K0 mesons are compared to scaled elementary production cross-sections and to predictions of theoretical models describing the in-medium production of kaons. The data represent a new reference for those models, which are widely used for interpretation of the strangeness-production in heavy-ion collisions. The presented results demonstrate the sensitivity of the kaon production to the reaction amplitudes inside nuclei and point to the existence of a repulsive KN-potential of 20+-5 MeV at normal nuclear matter density., Comment: 4 pages, 3 figures. References corrected. Minor corrections in text and author list. Figure 3 corrected. Corrections in body and abstract after comments from the referees

Published
2009
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43. Isospin dependence of relative yields of K+ and K0 mesons at 1.528 AGeV

Author

Lopez, X., Kim, Y. J., Herrmann, N., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Caplar, R., Cordier, E., Crochet, P., Dupieux, P., Dzelalija, M., Fodor, Z., Gasparic, I., Gobbi, A., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kirejczyk, M., Kis, M., Koczon, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Merschmeyer, M., Neubert, W., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., Ryu, M. S., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stoicea, G., Tyminski, Z., Wagner, P., Wisniewski, K., Wohlfarth, D., Xiao, Z., Yushmanov, I., Zhilin, A., Ferini, G., and Gaitanos, T.

Subjects
TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY
Abstract

New results of K+ and K0 meson production in Ru+Ru and Zr+Zr collisions at beam energy of 1.528 AGeV, measured with the FOPI detector at GSI Darmstadt, are presented as a possible probe of isospin effects in high density nuclear matter. The measured double ratio (K+/K0)Ru/K+/K0)Zr is compared with a thermal model and a Relativistic Mean Field transport model using two different collision scenarios and under different assumptions on the stiffness of the symmetry energy. We found a good agreement with the thermal model predictions and the assumption of a soft symmetry energy for infinite nuclear matter.

Published
2007

44. Isospin dependence of relative yields of K^+ and K^0 mesons at 1.528A GeV

Author

Lopez, X., Kim, Y. J., Herrmann, N., Andronic, A., Barret, V., Basrak, Zoran, Bastid, N., Benabderrahmane, M. L., Čaplar, Roman, Cordier, E., Crochet, P., Dupieux, P., Dželalija, Mile, Fodor, Z., Gašparić, Igor, Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kirejczyk, M., Kiš, Mladen, Koczon, P., Korolija, Milorad, Kotte, R., Lebedev, A., Leifels, Y., Merschmeyer, M., Neubert, W., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., Ryu, M. S., Schuttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stoicea, G., Tyminski, Z., Wagner, P., Wi´sniewski, K., Wohlfarth, D., Xiao, Z. G., Yushmanov, I., Zhang, X. Y., Zhilin, A., Ferini, G., and Gaitanos, T.

Subjects
Nuclear Theory, heavy ions, kaons, strangeness, isospin, 1.5 AGeV, Nuclear Experiment
Abstract

Results on K+ and K0 meson production in 96 44Ru + 96 44Ru and 96 40Zr + 96 40Zr collisions at a beam kinetic energy of 1.528A GeV, measured with the FOPI detector at GSI-Darmstadt, are investigated as a possible probe of isospin effects in high-density nuclear matter. The measured double ratio (K+/K0)Ru/(K+/K0)Zr is compared to the predictions of a thermal model and a relativistic mean field transport model using two different collision scenarios and under different assumptions on the stiffness of the symmetry energy.We find good agreement with the thermal model prediction and the assumption of a soft symmetry energy for infinite nuclear matter, while more realistic transport simulations of the collisions show a similar agreement with the data but also exhibit a reduced sensitivity to the symmetry term.

Published
2007

45. Subthreshold production of $\Sigma$(1385) baryons in Al+Al collisions at 1.9 A GeV

Author

Lopez, X., Herrmann, N., Crochet, P., Andronic, A., Barret, V., Basrak, Z., Bastid, N., L. Benabderrahmane, M., Buehler, P., Cargnelli, M., Caplar, R., Cordier, E., Dupieux, P., D&#711zelalija, M., Fabbietti, L., Fodor, Z., Gaspari'C, I., Grishkin, Y., N. Hartmann, O., D. Hildenbrand, K., Hong, B., I. Kang, T., Kecskemeti, J., Kirejczyk, M., J. Kim, Y., Kis, M., Koczon, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Manko, V., Marton, J., Matulewicz, T., Merschmeyer, M., Neubert, W., Pelte, D., Petrovici, M., Piasecki, K., Rami, F., Reisdorf, W., S. Ryu, M., Schmidt, P., Schüttauf, A., Seres, Z., Sikora, B., S. Sim, K., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stoicea, G., Suzuki, K., Tyminski, Z., Wagner, P., Widmann, E., Wisniewski, K., Wohlfarth, D., G. Xiao, Z., Yushmanov, I., Y. Zhang, X., Zhilin, A., Zmeskal, J., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and FOPI

Subjects
25.75.Dw, Nuclear Theory, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

First measurement of subthreshold Sigma(1385) production is presented. Experimental data are presented for Al+Al reactions at 1.9A GeV measured with the FOPI detector at SIS/GSI. The Sigma ( 1385) / Lambda ratio is found to be in good agreement with the transport and statistical model predictions. The results allow for a better understanding of subthreshold strangeness production and strangeness exchange reaction which is the dominant process for K- production below and close-to threshold.

Published
2007
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46. Subthreshold production of Sigma(1385) baryons in Al+Al collisions at 1.9A GeV

Author

Lopez, X., Herrmann, N., Crochet, P., Andronic, A., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Bühler, P., Cargnelli, M., Caplar, R., Cordier, E., Dupieux, P., Dzelalija, M., Fabietti, L., Fodor, Z., Gasparic, I., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kirejczyk, M., Kim, Y. J., Kis, M., Koczon, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Marton, J., Merschmeyer, M., Neubert, W., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., Ryu, M. S., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stoicea, G., Suzuki, K., Tyminski, Z., Wagner, P., Wisniewski, K., Wohlfarth, D., Xiao, Z., Yushmanov, I., Zhang, X. Y., Zhilin, A., Zmeskal, J., Kienle, P., and Yamazaki, T.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

First deep sub-threshold production of the Sigma(1385) hyperon resonance is presented. The measurement was performed in Al+Al collisions at a beam energy of 1.9A GeV with the FOPI detector at GSI-Darmstadt. The result is found to be in relatively good agreement with the statistical model prediction. It allows to better understand strangeness sub-threshold production by leading information on the strangeness exchange reaction which is the dominant process for K- production below and close-to threshold.

Published
2007

47. Systematics of pion emission in heavy ion collisions in the 1A GeV regime

Author

Reisdorf, W., Stockmeier, M., Andronic, A., Benabderrahmane, M. L., Hartmann, O. N., Herrmann, N., Hildenbrand, K. D., Kim, Y. J., Kis, M., Koczon, P., Kress, T., Leifels, Y., Lopez, X., Merschmeyer, M., Schüttauf, A., Alard, J. P., Barret, V., Basrak, Z., Bastid, N., Caplar, R., Crochet, P., Dupieux, P., Dzelalija, M., Fodor, Z., Grishkin, Y., Hong, B., Kang, T. I., Kecskemeti, J., Kirejczyk, M., Korolija, M., Kotte, R., Lebedev, A., Matulewicz, T., Neubert, W., Petrovici, M., Rami, F., Ryu, M. S., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stoicea, G., Tyminski, Z., Wisniewski, K., Wohlfarth, D., Xiao, Z., Xu, H. S., Yushmanov, I., and Zhilin, A.

Abstract

Using the large acceptance apparatus FOPI, we study pion emission in the reactions (energies in A GeV are given in parentheses): 40Ca+40Ca (0.4, 0.6, 0.8, 1.0, 1.5, 1.93), 96Ru+96Ru (0.4, 1.0, 1.5), 96Zr+96Zr (0.4, 1.0, 1.5), 197Au+197Au (0.4, 0.6, 0.8, 1.0, 1.2, 1.5). The observables include longitudinal and transverse rapidity distributions and stopping, polar anisotropies, pion multiplicities, transverse momentum spectra, ratios (pi+/pi-) of average transverse momenta and of yields, directed flow, elliptic flow. The data are compared to earlier data where possible and to transport model simulations.

Published
2007

48. K0 and Λ production in Ni+Ni collisions near threshold

Author

Merschmeyer, M., Lopez, X., Bastid, N., Crochet, P., Herrmann, N., Andronic, A., Barret, V., Basrak, Z., Benabderrahmane, M. L., Caplar, R., Cordier, E., Dupieux, P., Dzelalija, M., Fodor, Z., Gasparic, I., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., Kang, T. I., Kecskemeti, J., Kim, Y. J., Kirejczyk, M., Kis, M., Matulewicz, T., Koczon, P., Korolija, M., Kotte, R., Lebedev, A., Leifels, Y., Mangiarotti, A., Pelte, D., Petrovici, M., Rami, F., Reisdorf, W., Ryu, M. S., Schüttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stoicea, G., Tyminski, Z., Wisniewski, K., Xiao, Z., Xu, H. S., Yushmanov, I., Zhang, X. Y., and Zhilin, A.

Abstract

New results concerning the production of neutral strange particles, K0 and Λ in Ni+Ni collisions at 1.93 AGeV, measured with the FOPI detector at GSI Darmstadt, are presented. Rapidity density distributions and Boltzmann slope parameter distributions are measured in nearly the full phase space of the reaction. The observables are compared to existing K+ and proton data. While the K0 data agree with previously reported K+ measurements, the Λ distributions show a different behavior relative to that of protons. The strangeness balance and the production yield per participating nucleon as a function of the centrality of the reaction are discussed, for the first time at SIS energies.

Published
2007

49. Subthreshold production of Sigma (1385) baryons in Al+Al collisions at 1.9A GeV

Author

Lopez, X., Herrmann, N., Crochet, P., Andronić, A., Barret, V., Basrak, Zoran, Bastid, N., Benabderrahmane, M..L., Buehler, P., Cargnelli, M., Čaplar, Roman, Cordier, E., Dupieux, P., Dželalija, Mile, Fabietti, L., Fodor, Z., Gašparić, Igor, Grishkin, Y., Hartmann, O..N., Hildenbrand, K..D., Hong, B., Kang, T..I., Kecskemeti, J., Kirejczyk, M., Kim, Y..J., Kiš, Mladen, Koczon, P., Korolija, Milorad, Kotte, R., Lebedev, A., Leifels, Y., Manko, V., Marton, J., Matulewicz, T., Merschmeyer, M., Neubert, W., Pelte, D., Petrovici, M., Piasecki, K., Rami, F., Reisdorf, W., Ryu, M. S., Schmidt, P., Schuttauf, A., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stoicea, G., Suzuki, K., Tyminski, Z., Wagner, P., Widmann, E., Wi´sniewski, K., Wohlfarth, D., Xiao, Z. G., Yushmanov, I., Zhang, X. Y., Zhilin, A., Zmeskal, J., Kienle, P., and Yamazaki, T.

Subjects
heavy-ion reaction, subthreshold production, Sigma baryon, Nuclear Theory, Nuclear Experiment
Abstract

First measurement of subthreshold Sigma(1385) production is presented. Experimental data are presented for Al+Al reactions at 1.9A GeV measured with the FOPI detector at SIS/GSI. The Sigma(1385)/Lambda ratio is found to be in good agreement with the transport and statistical model predictions. The results allowfor a better understanding of subthreshold strangeness production and strangeness exchange reaction which is the dominant process for K− production below and close-to threshold.

Published
2007

50. Systematics of pion emission in heavy ion collisions in the 1 A GeV regime

Author

Reisdorf, W., Stockmeier, M., Andronic, A., Benabderrahmane, M. L., Hartmann, O. N., Herrmann, N., Hildenbrand, K. D., Kim, Y. J., Kiš, Mladen, Koczon, P., Kress, T., Leifels, Y., Lopez, X., Merschmeyer, M., Schuttauf, A., Barret, V., Basrak, Zoran, Bastid, N., Čaplar, Roman, Crochet, P., Dupieux, P., Dželalija, Mile, Fodor, Z., Grishkin. Y., Hong, B., Kang, T. I., Kecskemeti , J., Kirejczyk, M., Korolija, Milorad, Kotte, R., Lebedev, A., Matulewicz, T., Neubert, W., Petrovicij, M., Rami, F., Ryu, M. S., Seres, Z., Sikora, B., Sim, K. S., Simion, V., Siwek-Wilczynska, K., Smolyankin, V., Stoicea, G., Tyminski, Z., Wisniewski, K., Wohlfarth, D., Xiao, Z. G., Xul, H. S., Yushmanov, I., and Zhilin, A.

Subjects
heavy ions, pion production, rapidity, stopping, flow, isospin
Abstract

Using the large acceptance apparatus FOPI, we study pion emission in the reactions (energies in A GeV are given in parentheses): 40Ca + 40Ca (0.4, 0.6, 0.8, 1.0, 1.5, 1.93), 96Ru + 96Ru (0.4, 1.0, 1.5), 96Zr + 96Zr (0.4, 1.0, 1.5), 197Au + 197Au (0.4, 0.6, 0.8, 1.0, 1.2, 1.5). The observables include longitudinal and transverse rapidity distributions and stopping, polar anisotropies, pion multiplicities, transverse momentum spectra, ratios (π +/π − ) of average transverse momenta and of yields, directed flow, elliptic flow. The data are compared to earlier data where possible and to transport model simulations.

Published
2007

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