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17 results on '"Planeta, R."'

1. Search for the critical point by the NA61/SHINE experiment

Author

Andronov, E., Aduszkiewicz, A., Andronov, E. V., Anticic, T., Baatar, B., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Brylinski, W., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Bzdak, A., Cherif, H., Cirkovic, M., Csanad, M., Czopowicz, T., Damyanova, A., Davis, N., Deveaux, M., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gazdzicki, M., Golosov, O., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kaptur, Emil, Kargin, N., Kashirin, E., Kielbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalik, K., Kowalski, Seweryn, Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., Laszlo, A., Lazareva, T. V., Lewicki, M., Lojek, K., Łysakowski, Bartosz, Lyubushkin, V. V., Mackowiak-Pawlowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Manic, D., Marchionni, A., Marcinek, A., Marino, A. D., Marton, K., Mathes, H.-J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, L., Morozov, S., Mrowczynski, S., Nagai, Y., Naskret, M., Ozvenchuk, V., Paolone, V., Pavin, M., Petukhov, O., Planeta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadala-Zezula, M., Prokhorova, D. S., Puławski, Szymon, Puzovic, J., Rauch, W., Ravonel, M., Renfordt, R., Richter-Was, E., Rohrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, Katarzyna, Seryakov, A. Y., Seyboth, P., Slodkowski, M., Snoch, A., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Strobele, H., Susa, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberic, D., Vechernin, V. V., Wickremasinghe, A., Wlodarczyk, Z., Wojtaszek-Szwarc, A., Wyszynski, O., Zambelli, L., Zimmerman, E. D., Zwaska, R., and Scomparin, Enrico

Subjects
Nuclear and High Energy Physics, Particle physics, Hadron, Nuclear Theory, FOS: Physical sciences, SPS, nucl-ex, 01 natural sciences, Deconfinement, law.invention, law, Critical point (thermodynamics), Intermittency, 0103 physical sciences, CERN, ddc:530, Nuclear Physics - Experiment, Multiplicity (chemistry), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Phase diagram, Physics, fluctuations, Large Hadron Collider, 010308 nuclear & particles physics, critical point, fluctuations, Observable
Abstract

NA61/SHINE is a fixed target experiment operating at CERN SPS. Its main goals are to search for the critical point of strongly interacting matter and to study the onset of deconfinement. For these goals a scan of the two dimensional phase diagram ($T$-$\mu_{B}$) is being performed at the SPS by measurements of hadron production in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of collision energy. In this paper the status of the search for the critical point of strongly interacting matter by the NA61/SHINE Collaboration is presented including recent results on proton intermittency, strongly intensive fluctuation observables of multiplicity and transverse momentum fluctuations. These measurements are expected to be sensitive to the correlation length and, therefore, have the ability to reveal the existence of the critical point via possible non-monotonic behavior. The new NA61/SHINE results are compared to the model predictions., Comment: 4 pages, 2 figures, to appear in a special issue of Nuclear Physics A dedicated to Quark Matter 2018

Published
2019

2. NA61/SHINE measurements of anisotropic flow relative to the spectator plane in Pb+Pb collisions at $30$A GeV/$c$

Author

Klochkov, V., Selyuzhenkov, I., Aduszkiewicz, A., Andronov, E., Anticic, T., Baatar, B., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Bryliński, W., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Bzdak, A., Cherif, H., Cirkovic, M., Csanad, M., Czopowicz, T., Damyanova, A., Davis, N., Deveaux, M., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gazdzicki, M., Golosov, O., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kaptur, Emil, Kargin, N., Kashirin, E., Kiełbowicz, M., Kireyeu, V. A., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalik, K., Kowalski, Seweryn, Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., Laszlo, A., Lazareva, T. V., Lewicki, M., Lojek, K., Łysakowski, Bartosz, Lyubushkin, V. V., Maćkowiak-Pawłowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Manic, D., Marchionni, A., Marcinek, A., Marino, A. D., Marton, K., Mathes, H-J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, L., Morozov, S., Mrówczyński, S., Nagai, Y., Naskret, M., Ozvenchuk, V., Paolone, V., Pavin, M., Petukhov, O., Planeta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadała-Zezula, M., Prokhorova, D. S., Puławski, Szymon, Puzovic, J., Rauch, W., Ravonel, M., Renfordt, R., Richter-Was, E., Rohrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rustamov, A., Rybczyński, M., Rybicki, A., Sadovsky, A., Schmidt, Katarzyna, Seryakov, A. Yu., Seyboth, P., Słodkowski, M., Snoch, A., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Stroebele, H., Susa, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberic, D., Vechernin, V. V., Wickremasinghe, A., Włodarczyk, Z., Wojtaszek-Szwarc, A., Wyszyński, O., Zambelli, L., Zimmerman, E. D., Zwaska, R., Antinori, Federico, Dainese, Andrea, Giubellino, Paolo, Greco, Vincenzo, Lombardo, Maria Paola, and Scomparin, Enrico

Subjects
Nuclear and High Energy Physics, Nuclear Theory, NA61/SHINE, FOS: Physical sciences, nucl-ex, 01 natural sciences, Nuclear physics, anisotropic flow, 0103 physical sciences, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, spectators, 010308 nuclear & particles physics, Plane (geometry), Projectile, Elliptic flow, CERN SPS, Collision, Flow (mathematics), Harmonics, Event (particle physics), Beam (structure)
Abstract

We present an analysis of the anisotropic flow harmonics in Pb+Pb collisions at beam momenta of 30$A$ GeV/$c$ collected by the NA61/SHINE experiment in the year 2016. Directed and elliptic flow coefficients are measured relative to the spectator plane estimated with the Projectile Spectators Detector (PSD). The flow coefficients are reported as a function of transverse momentum in different classes of collision centrality. The results are compared with a new analysis of the NA49 data for Pb+Pb collisions at 40$A$ GeV using forward calorimeters (VCal and RCal) for event plane estimation., Proceedings of the XXVIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2018), 4 page, 3 figures

Published
2018

3. Two-particle correlations in azimuthal angle and pseudorapidity in inelastic p + p interactions at the CERN Super Proton Synchrotron

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Ali, Y., Andronov, E., Anticic, T., Antoniou, N., Baatar, B., Bay, F., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Christakoglou, P., Cirkovic, M., Czopowicz, T., Damyanova, A., Davis, N., Dembinski, H., Deveaux, M., Diakonos, F., Di Luise, S., Dominik, W., Dumarchez, J., Engel, R., Ereditato, A., Feofilov, G. A., Fodor, Z., Garibov, A., Gazdzicki, M., Golubeva, M., Grebieszkow, K., Grzeszczuk, A., Guber, F., Haesler, A., Hasegawa, T., Herve, A. E., Hierholzer, M., Hylen, J., Igolkin, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kapoyannis, A., Kaptur, E., Kielbowicz, M., Kisiel, J., Knezevic, N., Kobayashi, T., Kolesnikov, V. I., Kolev, D., Kondratiev, V. P., Korzenev, A., Kovalenko, V., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kuich, M., Kurepin, A., Larsen, D., Laszlo, A., Lewicki, M., Lundberg, B., Lyubushkin, V. V., Mackowiak-Pawlowska, M., Maksiak, B., Malakhov, A. I., Manic, D., Marchionni, A., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A., Messerly, B., Mills, G. B., Morozov, S., Mrowczynski, S., Nagai, Y., Nakadaira, T., Naskret, M., Nirkko, M., Nishikawa, K., Ozvenchuk, V., Panagiotou, A. D., Paolone, V., Pavin, M., Petukhov, O., Pistillo, C., Planeta, R., Popov, B. A., Posiadala, M., Pulawski, S., Puzovic, J., Rameika, R., Rauch, W., Ravonel, M., Redij, A., Renfordt, R., Richter-Was, E., Robert, A., Rohrich, D., Rondio, E., Roth, M., Rubbia, A., Rumberger, B. T., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Sakashita, K., Sarnecki, R., Schmidt, K., Sekiguchi, T., Selyuzhenkov, I., Seryakov, A., Seyboth, P., Sgalaberna, D., Shibata, M., Slodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strobele, H., Susa, T., Szuba, M., Tada, M., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Vassiliou, M., Veberic, D., Vechernin, V. V., Vesztergombi, G., Vinogradov, L., Walewski, M., Wickremasinghe, A., Wilczek, A., Wlodarczyk, Z., Wojtaszek-Szwarc, A., Wyszynski, O., Zambelli, L., Zimmerman, E. D., Zwaska, R., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), NA61/SHINE, Blondel, Alain, Bravar, Alessandro, Damyanova, Antoaneta, Haesler, Alexis, Korzenev, Alexander, Ravonel Salzgeber, Melody, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire de Physique Nucléaire et de Hautes Énergies ( LPNHE ), and Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
NA61, Physics and Astronomy (miscellaneous), Hadron, resonance: effect, 01 natural sciences, Resonance (particle physics), angular distribution, Nuclear Experiment (nucl-ex), [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Quantum statistical mechanics, Nuclear Experiment, Physics, angular correlation: two-particle, Large Hadron Collider, Super Proton Synchrotron, error: statistical, statistics: quantum, Pseudorapidity, correlation function: ratio, Particle Physics - Experiment, correlation: two-particle, CERN, SPS, NA61/SHINE, two-particle correlation, p p: scattering, CERN Lab, 530 Physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, ddc:500.2, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear physics, resonance: decay, momentum: conservation law, 0103 physical sciences, ddc:530, structure, 010306 general physics, numerical calculations, Engineering (miscellaneous), Spectrometer, 010308 nuclear & particles physics, proton synchrotron, 20-158 GeV-cms/nucleon, rapidity, Particle, High Energy Physics::Experiment, hadron, spectrometer, decay: weak interaction, experimental results, acceptance
Abstract

Results on two-particle $\Delta\eta\Delta\phi$ correlations in inelastic p+p interactions at 20, 31, 40, 80, and 158~GeV/c are presented. The measurements were performed using the large acceptance NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The data show structures which can be attributed mainly to effects of resonance decays, momentum conservation, and quantum statistics. The results are compared with the EPOS and UrQMD models., Comment: v2: Minor text changes, Fig. 10 updated, version published in Eur. Phys. J. C

Published
2017

4. Multiplicity and transverse momentum fluctuations in inelastic proton-proton interactions at the CERN Super Proton Synchrotron

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Ali, Y., Andronov, E., Anticic, T., Antoniou, N., Baatar, B., Bay, F., Blondel, A., Blumer, J., Bogomilov, M., Bravar, A., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Christakoglou, P., Cirkovic, M., Czopowicz, T., Davis, N., Debieux, S., Dembinski, H., Deveaux, M., Diakonos, F., Di Luise, S., Dominik, W., Dumarchez, J., Dynowski, K., Engel, R., Ereditato, A., Feofilov, G. A., Fodor, Z., Garibov, A., Gazdzicki, M., Golubeva, M., Grebieszkow, K., Grzeszczuk, A., Guber, F., Haesler, A., Hasegawa, T., Herve, A., Hierholzer, M., Igolkin, S., Ivashkin, A., Kadija, K., Kapoyannis, A., Kaptur, E., Kisiel, J., Kobayashi, T., Kolesnikov, V. I., Kolev, D., Kondratiev, V. P., Korzenev, A., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kuich, M., Kurepin, A., Larsen, D., Laszlo, A., Lewicki, M., Lyubushkin, V. V., Mackowiak-Pawlowska, M., Maksiak, B., Malakhov, A. I., Manic, D., Marcinek, A., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Morozov, S., Mrowczynski, S., Nakadaira, T., Naskret, M., Nirkko, M., Nishikawa, K., Panagiotou, A. D., Pavin, M., Petukhov, O., Pistillo, C., Planeta, R., Popov, B. A., Posiadala, M., Pulawski, S., Puzovic, J., Rauch, W., Ravonel, M., Redij, A., Renfordt, R., Richter-Was, E., Robert, A., Rohrich, D., Rondio, E., Roth, M., Rubbia, A., Rustamov, A., Rybczynski, M., Sadovsky, A., Sakashita, K., Sarnecki, R., Schmidt, K., Sekiguchi, T., Seryakov, A., Seyboth, P., Sgalaberna, D., Shibata, M., Slodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strobele, H., Susa, T., Szuba, M., Tada, M., Tefelska, A., Tefelski, D., Tereshchenko, V., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Vassiliou, M., Veberic, D., Vechernin, V. V., Vesztergombi, G., Vinogradov, L., Wilczek, A., Wlodarczyk, Z., Wojtaszek-Szwarc, A., Wyszynski, O., Zambelli, L., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), NA61/SHINE, Laboratoire de Physique Nucléaire et de Hautes Énergies ( LPNHE ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), Blondel, Alain, Bravar, Alessandro, Debieux, Stéphane, Haesler, Alexis, Korzenev, Alexander, and Ravonel Salzgeber, Melody

Subjects
charged particle: hadroproduction, Particle physics, CERN Lab, Physics and Astronomy (miscellaneous), Hadron, Monte Carlo method, FOS: Physical sciences, ddc:500.2, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], transverse momentum fluctuations, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], multiplicity, ddc:530, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Multiplicity (chemistry), 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), p p: inelastic scattering, Physics, fireball: energy, Large Hadron Collider, multiplicity: fluctuation, 010308 nuclear & particles physics, NUCLEUS-NUCLEUS COLLISIONS, MODEL, ENERGIES, GEV/C, Sigma, CERN SPS, proton synchrotron, Super Proton Synchrotron, transverse momentum: fluctuation, Charged particle, 3. Good health, beam: momentum, nucleon: model, NA49, numerical calculations: Monte Carlo, Nucleon, 20 GeV/c31 GeV/c40 GeV/c80 GeV/c158 GeV/c, statistical, Particle Physics - Experiment, experimental results
Abstract

Measurements of multiplicity and transverse momentum fluctuations of charged particles were performed in inelastic p+p interactions at 20, 31, 40, 80 and 158 GeV/c beam momentum. Results for the scaled variance of the multiplicity distribution and for three strongly intensive measures of multiplicity and transverse momentum fluctuations \$\Delta[P_{T},N]\$, \$\Sigma[P_{T},N]\$ and \$\Phi_{p_T}\$ are presented. For the first time the results on fluctuations are fully corrected for experimental biases. The results on multiplicity and transverse momentum fluctuations significantly deviate from expectations for the independent particle production. They also depend on charges of selected hadrons. The string-resonance Monte Carlo models EPOS and UrQMD do not describe the data. The scaled variance of multiplicity fluctuations is significantly higher in inelastic p+p interactions than in central Pb+Pb collisions measured by NA49 at the same energy per nucleon. This is in qualitative disagreement with the predictions of the Wounded Nucleon Model. Within the statistical framework the enhanced multiplicity fluctuations in inelastic p+p interactions can be interpreted as due to event-by-event fluctuations of the fireball energy and/or volume., Comment: 18 pages, 12 figures

Published
2015

5. Freeze-out configuration properties in the 197Au + 197Au reaction at 23 AMeV

Author

Najman, R., Planeta, R., Sochocka, A., Amorini, F., Auditore, L., Cap, T., Cardella, G., De Filippo, E., Geraci, E., Grzeszczuk, A., Kowalski, S., Kozik, T., Lanzalone, G., Lombardo, I., Majka, Z., Nicolis, N. G., Pagano, A., Piasecki, E., Pirrone, S., Politi, G., Rizzo, F., Russotto, P., Siwek-Wilczynska, K., Skwira-Chalot, I., Trifiro, A., Trimarchi, M., Wilczynski, J., and Zipper, W.

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

Data from the experiment on the 197Au + 197Au reaction at 23 AMeV are analyzed with an aim to find signatures of exotic nuclear configurations such as toroid-shaped objects. The experimental data are compared with predictions of the ETNA code dedicated to look for such configurations and with the QMD model. A novel criterion of selecting events possibly resulting from the formation of exotic freeze-out configurations, "the efficiency factor", is tested. Comparison between experimental data and model predictions may indicate for the formation of flat/toroidal nuclear systems.

Published
2015
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6. Measurements of Production Properties of K0S mesons and Lambda hyperons in Proton-Carbon Interactions at 31 GeV/c

Author

Abgrall, N., Aduszkiewicz, A., Ali, Y., Anticic, T., Antoniou, N., Argyriades, J., Baatar, B., Blondel, A., Blumer, J., Bogomilov, M., Bravar, A., Brooks, W., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Christakoglou, P., Czopowicz, T., Davis, N., Debieux, S., Dembinski, H., Diakonos, F., Di Luise, S., Dominik, W., Drozhzhova, T., Dumarchez, J., Dynowski, K., Engel, R., Ereditato, A., Esposito, L., Feofilov, G. A., Fodor, Z., Fulop, A., Ga��dzicki, M., Golubeva, M., Grebieszkow, K., Grzeszczuk, A., Guber, F., Hakobyan, H., Haesler, A., Hasegawa, T., Hierholzer, M., Idczak, R., Igolkin, S., Ivanov, Y., Ivashkin, A., Jokovic, D., Kadija, K., Kapoyannis, A., Katrynska, N., Kaptur, E., Kielczewska, D., Kikola, D., Kirejczyk, M., Kisiel, J., Kiss, T., Kleinfelder, S., Kobayashi, T., Kolesnikov, V. I., Kolev, D., Kondratiev, V. P., Korzenev, A., Kowalski, S., Krasnoperov, A., Kuleshov, S., Kurepin, A., Larsen, D., Laszlo, A., Lyubushkin, V. V., Mackowiak-Pawlowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Maletic, D., Manic, D., Marchionni, A., Marcinek, A., Marin, V., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Mr��wczy��ski, St., Murphy, S., Nakadaira, T., Nirkko, M., Nishikawa, K., Palczewski, T., Palla, G., Panagiotou, A. D., Paul, T., Peryt, W., Pistillo, C., Redij, A., Petukhov, O., Planeta, R., Pluta, J., Popov, B. A., Posiada��a, M., Pu��awski, S., Puzovic, J., Rauch, W., Ravonel, M., Renfordt, R., Robert, A., R��hrich, D., Rondio, E., Roth, M., Rubbia, A., Rustamov, A., Rybczynski, M., Sadovsky, A., Sakashita, K., Savic, M., Schmidt, K., Sekiguchi, T., Seyboth, P., Shibata, M., Sipos, R., Skrzypczak, E., Slodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Susa, T., Szuba, M., Tada, M., Tereshchenko, V., Tolyhi, T., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Vassiliou, M., Veberic, D., Vechernin, V. V., Vesztergombi, G., Vinogradov, L., Wilczek, A., Wlodarczyk, Z., Wojtaszek, A., Wyszy��ski, O., Zambelli, L., and Zipper, W.

Subjects
Accelerator Physics (physics.acc-ph), Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, Physics - Accelerator Physics, Nuclear Experiment (nucl-ex), Nuclear Experiment, Accelerators and Storage Rings
Abstract

Spectra of $K^0_S$ mesons and $\Lambda$ hyperons were measured in p+C interactions at 31 GeV/c with the large acceptance NA61/SHINE spectrometer at the CERN SPS. The data were collected with an isotropic graphite target with a thickness of 4% of a nuclear interaction length. Interaction cross sections, charged pion spectra, and charged kaon spectra were previously measured using the same data set. Results on $K^0_S$ and $\Lambda$ production in p+C interactions serve as reference for the understanding of the enhancement of strangeness production in nucleus-nucleus collisions. Moreover, they provide important input for the improvement of neutrino flux predictions for the T2K long baseline neutrino oscillation experiment in Japan. Inclusive production cross sections for $K^0_S$ and $\Lambda$ are presented as a function of laboratory momentum in intervals of the laboratory polar angle covering the range from 0 up to 240 mrad. The results are compared with predictions of several hadron production models. The $K^0_S$ mean multiplicity in production processes $$ and the inclusive cross section for $K^0_S$ production were measured and amount to 0.127 $\pm$ 0.005 (stat) $\pm$ 0.022 (sys) and 29.0 $\pm$ 1.6 (stat) $\pm$ 5.0 (sys) mb, respectively. Spectra of KS0 mesons and Λ hyperons were measured in p + C interactions at 31 GeV/c with the large acceptance NA61/SHINE spectrometer at the CERN SPS. The data were collected with an isotropic graphite target with a thickness of 4% of a nuclear interaction length. Interaction cross sections, charged pion spectra, and charged kaon spectra were previously measured using the same data set. Results on KS0 and Λ production in p + C interactions serve as a reference for the understanding of the enhancement of strangeness production in nucleus-nucleus collisions. Moreover, they provide important input for the improvement of neutrino flux predictions for the T2K long baseline neutrino oscillation experiment in Japan. Inclusive production cross sections for KS0 and Λ are presented as a function of laboratory momentum in intervals of the laboratory polar angle covering the range from 0 up to 240 mrad. The results are compared with predictions of several hadron production models. The KS0 mean multiplicity in production processes 〈nKS0〉 and the inclusive cross section for KS0 production σKS0 were measured and amount to 0.127 ± 0.005 (stat) ± 0.022 (sys) and 29.0 ± 1.6 (stat) ± 5.0 (sys) mb, respectively. Spectra of $K^0_S$ mesons and $\Lambda$ hyperons were measured in p+C interactions at 31 GeV/c with the large acceptance NA61/SHINE spectrometer at the CERN SPS. The data were collected with an isotropic graphite target with a thickness of 4% of a nuclear interaction length. Interaction cross sections, charged pion spectra, and charged kaon spectra were previously measured using the same data set. Results on $K^0_S$ and $\Lambda$ production in p+C interactions serve as reference for the understanding of the enhancement of strangeness production in nucleus-nucleus collisions. Moreover, they provide important input for the improvement of neutrino flux predictions for the T2K long baseline neutrino oscillation experiment in Japan. Inclusive production cross sections for $K^0_S$ and $\Lambda$ are presented as a function of laboratory momentum in intervals of the laboratory polar angle covering the range from 0 up to 240 mrad. The results are compared with predictions of several hadron production models. The $K^0_S$ mean multiplicity in production processes $$ and the inclusive cross section for $K^0_S$ production were measured and amount to 0.127 $\pm$ 0.005 (stat) $\pm$ 0.022 (sys) and 29.0 $\pm$ 1.6 (stat) $\pm$ 5.0 (sys) mb, respectively.

Published
2013

7. Correlations between emission timescale of fragments and isospin dynamics in $^{124}$Sn+$^{64}$Ni and $^{112}$Sn+$^{58}$Ni reactions at 35 AMeV

Author

De Filippo, E., Pagano, A., Russotto, P., Amorini, F., Anzalone, A., Auditore, Lucrezia, Baran, V., Berceanu, I., Borderie, B., Bougault, R., Bruno, M., Cap, T., Cardella, G., Cavallaro, S., Chatterjee, M. B., Chbihi, A., Colonna, M., D’Agostino, M., Dayras, R., Di Toro, M., Frankland, J., Galichet, E., Gawlikowicz, W., Geraci, E., Grzeszczuk, A., Guazzoni, P., Kowalski, S., La Guidara, E., Lanzalone, G., Lanzanò, G., Le Neindre, N., Lombardo, I., Maiolino, C., Papa, M., Piasecki, E., Pirrone, S., Planeta, R., Politi, G., Pop, A., Porto, F., Rivet, M. F., Rizzo, F., Rosato, E., Schmidt, K., Siwek Wilczynska, K., Skwira Chalot, I., Trifiro', Antonio, Trimarchi, Marina, Verde, G., Vigilante, M., Wieleczko, J. P., Wilczynski, J., Zetta, L., Zipper, W., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
25.70.Mn, 25.70.Pq, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

We present a new experimental method to correlate the isotopic composition of intermediate mass fragments (IMF) emitted at mid-rapidity in semi-peripheral collisions with the emission timescale: IMFs emitted in the early stage of the reaction show larger values of $$ isospin asymmetry, stronger angular anisotropies and reduced odd-even staggering effects in neutron to proton ratio $$ distributions than those produced in sequential statistical emission. All these effects support the concept of isospin "migration", that is sensitive to the density gradient between participant and quasi-spectator nuclear matter, in the so called neck fragmentation mechanism. By comparing the data to a Stochastic Mean Field (SMF) simulation we show that this method gives valuable constraints on the symmetry energy term of nuclear equation of state at subsaturation densities. An indication emerges for a linear density dependence of the symmetry energy., Comment: 17 pages, 7 figures; submitted to Physical Rev. C

Published
2012
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8. Na61/Shine at the CERN SPS

Author

Abgrall, N., Aduszkiewicz, A., Andrieu, B., Anticic, T., Antoniou, N., Asryan, A. G., Baatar, B., Blondel, A., Blumer, J., Boldizsar, L., Bravar, A., Brzychczyk, J., Bunyatov, S. A., Cafagna, F., Catanesi, M. G., Choi, K. -U, Christakoglou, P., Chung, P., Cleymans, J., Derkach, D. A., Diakonos, F., Dominik, W., Dumarchez, J., Engel, R., Ereditato, A., Feofilov, G. A., Fodor, Z., Gazdzicki, M., Golubeva, M., Grebieszkow, K., Guber, F., Haungs, A., Hess, M., Igolkin, S., Ivanov, A. S., Alexander Ivashkin, Kadija, K., Karabowicz, R., Katrynska, N., Kielczewska, D., Kikola, D., Kim, J. -H, Kobayashi, T., Kolesnikov, V. I., Kolev, D., Kolevatov, R. S., Kondratiev, V. P., Kurepin, A., Lacey, R., Laszlo, A., Lehmann, S., Lungwitz, B., Lyubushkin, V. V., Maevskaya, A., Majka, Z., Malakhov, A. I., Marchionni, A., Di Marco, M., Matveev, V., Melkumov, G. L., Meregaglia, A., Messina, M., Meurer, C., Mijakowski, P., Mitrovski, M., Montaruli, T., Mrówczyński, St, Murphy, S., Nakadaira, T., Naumenko, P. A., Nikolic, V., Palczewski, T., Palla, G., Panagiotou, A. D., Peryt, W., Petridis, A., Planeta, R., Pluta, J., Popov, B. A., Posiadala, M., Przewlocki, P., Radicioni, E., Rauch, W., Renfordt, R., Röhrich, D., Rondio, E., Rossi, B., Roth, M., Rubbia, A., Rybczynski, M., Sadovsky, A., Sakashita, K., Schuster, T., Sekiguchi, T., Seyboth, P., Shileev, K., Sissakian, A. N., Skrzypczak, E., Slodkowski, M., Sorin, A. S., Staszel, P., Stefanek, G., Stepaniak, J., Strabel, C., Stroebele, H., Susa, T., Szentpetery, I., Szuba, M., Taranenko, A., Tsenov, R., Unger, M., Vassiliou, M., Vechernin, V. V., Vesztergombi, G., Wlodarczyk, Z., Wojtaszek, A., Yi, J. -G, and Yoo, I. -K

Subjects
Physics::Instrumentation and Detectors, Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, Nuclear Physics
Abstract

Status of the new experimental program to study hadron production in hadron-nucleus and nucleus-nucleus collisions at the CERN SPS will be presented. In particular, a detailed physics motivation and experimental strategy will be given for the part of the program related to the physics of strongly interacting matter: search for the critical point of strongly interacting matter, study properties of the onset of deconfinement, and high p_T measurements in p+p and p+A interactions. The planned measurements for the neutrino T2K and cosmic-ray experiments will also be discussed., Proceedings of CPOD07, Darmstadt, Germany

Published
2007

9. Production of Mesons and Baryons at High Rapidity and High pT in Proton-Proton Collisions at $\sqrt(s)$=200 GeV

Author

Arsene, I., Bearden, I.G., Beavis, D., Bekele, S., Besliu, C., Budick, B., Boggild, H., Chasman, C., Christensen, C.H., Dalsgaard, H.H., Debbe, R., Gaardhoje, J.J., Hagel, K., Ito, H., Jipa, A., Johnson, E.B., Jorgensen, C.E., Karabowicz, R., Katrynska, N., Kim, E.J., Larsen, T.M., Lee, J.H., Lindal, S., Lovhoiden, G., Majka, Z., Murray, M., Natowitz, J., Nielsen, B.S., Nygaard, C., Planeta, R., Rami, F., Renault, F., Ristea, C., Ristea, O., Rohrich, D., Samset, B.H., Sanders, S.J., Scheetz, R.A., Staszel, P., Tveter, T.S., Videbaek, F., Wada, R., Yin, Z., Yang, H., Zgura, I.S., 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 BRAHMS

Subjects
High Energy Physics - Experiment (hep-ex), FRAGMENTATION FUNCTIONS, Nuclear Theory, QUARK, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, 13.85.Ni, 13.85.Hd, 13.87.Fh, 25.75.Dw, High Energy Physics - Experiment, CROSS-SECTIONS
Abstract

We present particle spectra for charged hadrons $\pi^\pm, K^\pm, p$ and $\bar{p}$ from pp collisions at $\sqrt{s}=200$ GeV measured for the first time at forward rapidities (2.95 and 3.3). The kinematics of these measurements are skewed in a way that probes the small momentum fraction in one of the protons and large fractions in the other. Large proton to pion ratios are observed at values of transverse momentum that extend up to 4 GeV/c, where protons have momenta up to 35 GeV. Next-to-leading order perturbative QCD calculations describe the production of pions and kaons well at these rapidities, but fail to account for the large proton yields and small $\bar{p}/p$ ratios., Comment: Accepted for publication in PRL. Minor changes in text, added two references, updated table 1

Published
2007

10. Centrality dependent particle production at y=0 and y $\sim$ 1 in Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV

Author

Arsene, I., Bearden, I.G., Beavis, D., Besliu, C., Budick, B., Boggild, H., Chasman, C., Christensen, C.H., Christiansen, P., Cibor, J., Debbe, R., Enger, E., Gaardhoje, J.J., Germinario, M., Hagel, K., Ito, H., Jipa, A., Jundt, F., Jordre, J.I., Jorgensen, C.E., Karabowicz, R., Kim, E.J., Kozik, T., Larsen, T.M., Lee, J.H., Lee, Y.K., Lindal, S., Lystad, R., Lovhoiden, H., Mjka, Z., Makeev, A., Mikelsen, M., Murray, M., Natowitz, J., Neumann, B., Nielsen, B.S., Ouerdane, D., Planeta, R., Rami, F., Ristea, C., Ristea, O., Röhrich, D., Samset, B.H., Sandberg, D., Sanders, S.J., Scheetz, R.A., Staszel, P., Tveter, T.S, Videbaek, F., Wada, R., Yin, Z., Zgura, I.S., 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 BRAHMS

Subjects
rapidity, spectra, flow, 25.75.Dw, Nuclear Theory, FOS: Physical sciences, High Energy Physics::Experiment, centrality, Nuclear Experiment (nucl-ex), transverse momentum, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Particle production of identified charged hadrons, $\pi^{\pm}$, $K^{\pm}$, $p$, and $\bar{p}$ in Au+Au collisions at $\sqrt(snn) =$ 200 GeV has been studied as a function of transverse momentum and collision centrality at $y=0$ and $y\sim1$ by the BRAHMS experiment at RHIC. Significant collective transverse flow at kinetic freeze-out has been observed in the collisions. The magnitude of the flow rises with the collision centrality. Proton and kaon yields relative to the pion production increase strongly as the transverse momentum increases and also increase with centrality. Particle yields per participant nucleon show a weak dependence on the centrality for all particle species. Hadron production remains relatively constant within one unit around midrapidity in Au+Au collisions at $\sqrt(snn) =$ 200 GeV., Comment: 52 authors, 8 pages, 12 Figures, 3 Tables, submitted to PRC

Published
2005

11. Charged meson rapidity distributions in central Au+Au collisions at $\sqrt{s_{NN}$ = 200 GeV

Author

Bearden, I.G., Beavis, D., Besliu, C., Budick, B., Boggild, H., Chasman, C., Christensen, C.H., Christiansen, P., Cibor, J., Debbe, R., Enger, E., Gaardhoje, J.J., Germinario, M., Hagel, K., Hansen, O., Holm, A., Holme, A.K., Ito, H., Jipa, A., Jundt, F., Jordre, J.I., Jorgensen, C.E., Karabowicz, R., Kim, E.J., Kozik, T., Larsen, T.M., Lee, J.H., Lee, Y.K., Lovhoiden, G., Majka, Z., Makeev, A., Mikelsen, M., Murray, M., Natowitz, J., Nielsen, B.S., Norris, J., Olchanski, K., Ouerdane, D., Planeta, R., Rami, F., Ristea, C., Röhrich, D., Samset, B.H., Sandberg, D., Sanders, S.J., Sheetz, R.A., Staszel, P., Tveter, T.S., Videbaek, F., Wada, R., Yin, Z., Zgura, I.S., 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 BRAHMS

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

We have measured rapidity densities dN/dy of pions and kaons over a broad rapidity range (-0.1 < y < 3.5) for central Au+Au collisions at sqrt(snn) = 200 GeV. These data have significant implications for the chemistry and dynamics of the dense system that is initially created in the collisions. The full phase-space yields are 1660 +/- 15 +/- 133 (pi+), 1683 +/- 16 +/- 135 (pi-), 286 +/- 5 +/- 23 (K+) and 242 +/- 4 +/- 19 (K-). The systematics of the strange to non--strange meson ratios are found to track the variation of the baryo-chemical potential with rapidity and energy. Landau--Carruthers hydrodynamic is found to describe the bulk transport of the pions in the longitudinal direction., 4 pages, 4 figures, 1 table, submitted to Physical Review Letters. Updates : data are now corrected for feed down from Lambda and K0short decays, figures and tables show the corrected data. The text has been cleared and details on corrections to the data added

Published
2005

12. Centrality dependence of charged particle pseudorapidity distributions from d+Au collisions at $\sqrt{s_{NN}}$=200 GeV

Author

Arsene, I., Bearden, I.G., Beavis, D., Besliu, C., Budick, B., Boggild, H., Chasman, C., Christensen, C.H., Christiansen, P., Cibor, J., Debbe, R., Enger, E., Gaardhoje, J.J., Germinario, M., Hagel, K., Hansen, O., Holm, A., Ito, H., Jipa, A., Jundt, F., Jordre, J.I., Karabowicz, R., Kim, E.J., Kozik, T., Larsen, T.M., Lee, J.H., Lee, Y.K., Lindal, S., Lystad, R., Lovhoiden, G., Majka, Z., Makeev, A., McBreen, B., Mikelsen, M., Murray, M., Natowitz, J., Neumann, B., Nielsen, B.S., Norris, J., Ouerdane, D., Planeta, R., Rami, F., Ristea, C., Ristea, O., Röhrich, D., Samset, B.H., Sandberg, D., Sanders, S.J., Scheetz, R.A., Staszel, P., Tveter, T.S., Videbaek, F., Wada, R., Yin, Z., Zgura, I.S., 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 BRAHMS

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

Charged-particle pseudorapidity densities are presented for the d+Au reaction at sqrt{s_{NN}}=200 GeV with -4.2, 4 pages, 3figures; expanded discussion of uncertainties; added 60-80% centrality range; added additional discussion on centrality selection bias

Published
2005

13. Scanning the phases of QCD with BRAHMS

Author

Arsene, I., Bearden, I.G., Beavis, D., Besliu, C., Budick, B., Boggild, H., Chasman, C., Christensen, C.H., Christiansen, P., Cibor, J., Debbe, R., Enger, E., Gaardhoje, J.J., Germinario, M., Hagel, K., Ito, H., Jipa, A., Jundt, F., Jordre, J.I., Jorgensen, C.E., Karabowicz, R., Kim, E.J., Kozik, T., Larsen, T.M., Lee, J.H., Lee, Y.K., Lindal, S., Lystad, R., Lovhoiden, G., Majka, Z., Makeev, A., Mikelsen, M., Murray, M., Natowitz, J., Neumann, B., Nielsen, B.S., Ouerdane, D., Planeta, R., Rami, F., Ristea, C., Ristea, O., Röhrich, D., Samset, B.H., Sandberg, D., Sanders, S.J., Scheetz, R.A., Staszel, P., Tveter, T.S., Videbaek, F., Wada, R., Yin, Z., Zgura, I.S., 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 BRAHMS

Subjects
Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Range (particle radiation), High Energy Physics::Lattice, Hadron, High Energy Physics::Phenomenology, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Color-glass condensate, Nuclear physics, Quark–gluon plasma, Heavy ion, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

BRAHMS has the ability to study relativistic heavy ion collisions from the final freeze-out of hadrons all the way back to the initial wave-function of the gold nuclei. This is accomplished by studying hadrons with a very wide range of momenta and angles. In doing so we can scan various phases of QCD, from a hadron gas, to a quark gluon plasma and perhaps to a color glass condensate., 8 pages, 6 figures, proceedings of plenary talk at Quark Matter 2004 conference

Published
2004

14. The rapidity and centrality dependence of nuclear modification factors at RHIC - what does bulk particle production tell us about the nuclear medium ?

Author

Arsene, I., Bearden, G., Beavis, D., Besliu, C., Budick, B., Boggild, H., Chasman, C., Christensen, C.H., Christiansen, P., Cibor, J., Debbe, R., Enger, E., Gaardhoje, J.J., Germinario, M., Hagel, K., Ito, H., Jipa, A., Jundt, F., Jordre, J.I., Jorgensen, C.E., Karabowicz, R., Kim, E.J., Larsen, T.M., Lee, J.H., Lee, Y.K., Lindal, S., Lovhoiden, G., Majka, Z., Makeev, A., McBreen, B., Mikelsen, M., Murray, M., Natowitz, J., Neumann, B., Nielsen, B.S., Norris, J., Ouerdane, D., Planeta, R., Rami, F., Ristea, C., Ristea, O., Rohrich, D., Sandberg, D., Sanders, S.J., Scheetz, R.A., Staszel, P., Tveter, T.S., Videbaek, F., Wada, R., Yin, Z., Zgura, I.S., 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 BRAHMS

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

The BRAHMS experiment at RHIC has measured the production of charged hadrons as a function of pseudorapidity and transverse momentum in Au+Au, d+Au and p+p collisions at a common energy of sqrt(s_NN)=200GeV, and from these spectra we construct the nuclear modification factors for both ``hot'' and ``cold'' nuclear matter. In this contribution I will show how these factors evolve with pseudorapidity and collision centrality. We see a Cronin-like enhancement in d+Au collisions at midrapidity, going to a strong suppression at eta >= 2. In central Au+Au collisions we find a suppression both at mid- and forward rapidities that vanishes for peripheral collisions. We interpret this as signs of several different medium related effects modifying bulk particle production in Au+Au and d+Au collisions at RHIC energies., 6 pages, 6 figures, prepared for the proceedings of the XLII International Winter Meeting on Nuclear Physics, Bormio, 2004

Published
2004

15. Forward and midrapidity like-particle ratios from p+p collisions at sqrt(s)=200 GeV

Author

Bearden, I.G., Beavis, D., Besliu, C., Budick, B., Boggild, H., Chasman, C., Christensen, C.H., Chrisitansen, P., Cibor, J., Debbe, R., Enger, E., Gaardhoje, J.J., Germinario, M., Hagel, K., Holm, A., Holme, A.K., Ito, H., Jacobsen, E., Jipa, A., Jundt, F., Jordre, J.I., Jorgensen, C.E., Karabowicz, R., Keutgen, T., Kim, E.J., Kozik, T., Larsen, T.M., Lee, J.H., Lee, Y.K., Lovhoiden, G., Majka, Z., Makeev, A., Mikelsen, M., Murray, M.J., Natowitz, J., Nielsen, B.S., Norris, J., Olchanski, K., Ouerdane, D., Planeta, R., Rami, F., Ristea, C., Röhrich, D., Samset, B.H., Sandberg, D., Sanders, S.J., Scheetz, R.A., Staszel, P., Tveter, T.S., Videbaek, F., Wada, R., Wieloch, A., Yin, Z., Zgura, I.S., Collaboration, Brahms, 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 BRAHMS

Subjects
baryon junctions, limiting fragmentation, forward rapidity, FOS: Physical sciences, proton collisions, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment, 25.75.q, 25.40.-h, 13.75.-n, particle ratios
Abstract

We present a measurement of pi-\pi+, K-/K+ and pbar/p from p+p collisions at sqrt(s) = 20 0GeV over the rapidity range 0 2.0. The pbar/p ratio is very similar for p+p and 20% central Au+Au collisions at all rapidities. In the fragmentation region the three ratios seem to be independent of beam energy when viewed from the rest frame of one of the protons. Theoretical models based on quark-diquark breaking mechanisms overestimate the pbar/p ratio up to y ~< 3. Including additional mechanisms for baryon number transport such as baryon junctions leads to a better description of the data., Comment: 15 pages, 4 figures, uses elsart.sty. Changes to references and discussion based on referee comments, resubmitted to Phys. Lett. B

Published
2004
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16. Measurement of Production Properties of Positively Charged Kaons in Proton-Carbon Interactions at 31 GeV/c

Author

SHINE Collaboration, Abgrall, N., Aduszkiewicz, A., Anticic, T., Antoniou, N., Argyriades, J., Baatar, B., Blondel, A., Blumer, J., Bogusz, M., Boldizsar, L., Bravar, A., Brooks, W., Brzychczyk, J., Bubak, A., Bunyatov, S. A., Busygina, O., Cetner, T., Choi, K. -U., Christakoglou, P., Chung, P., Czopowicz, T., Davis, N., Diakonos, F., Di Luise, S., Dominik, W., Dumarchez, J., Engel, R., Ereditato, A., Esposito, L. S., Feofilov, G. A., Fodor, Z., Ferrero, A., Fulop, A., Garrido, X., Gazdzicki, M., Golubeva, M., Grebieszkow, K., Grzeszczuk, A., Guber, F., Haesler, A., Hakobyan, H., Hasegawa, T., Idczak, R., Ivanov, Y., Ivashkin, A., Kadija, K., Kapoyannis, A., Katrynska, N., Kielczewska, D., Kikola, D., Kim, J. -H., Kirejczyk, M., Kisiel, J., Kobayashi, T., Kochebina, O., Kolesnikov, V. I., Kolev, D., Kondratiev, V. P., Korzenev, A., Kowalski, S., Krasnoperov, A., Kuleshov, S., Kurepin, A., Lacey, R., Lagoda, J., Laszlo, A., Lyubushkin, V. V., Mackowiak-Pawlowska, M., Majka, Z., Malakhov, A. I., Marchionni, A., Marcinek, A., Maris, I., Marin, V., Matulewicz, T., Matveev, V., Melkumov, G. L., Meregaglia, A., Messina, M., Mrowczynski, St., Murphy, S., Nakadaira, T., Nishikawa, K., Palczewski, T., Palla, G., Panagiotou, A. D., Paul, T., Peryt, W., Petukhov, O., Planeta, R., Pluta, J., Popov, B. A., Posiadala, M., Pulawski, S., Rauch, W., Ravonel, M., Renfordt, R., Robert, A., Rohrich, D., Rondio, E., Rossi, B., Roth, M., Rubbia, A., Rybczynski, M., Sadovsky, A., Sakashita, K., Sekiguchi, T., Seyboth, P., Shibata, M., Skrzypczak, E., Slodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strabel, C., Strobele, H., Susa, T., Szaflik, P., Szuba, M., Tada, M., Taranenko, A., Tereshchenko, V., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Vassiliou, M., Veberic, D., Vechernin, V. V., Vesztergombi, G., Wilczek, A., Wlodarczyk, Z., Wojtaszek-Szwarc, A., Yi, J. -G., Yoo, I. -K., Zambelli, L., Zipper, W., Abgrall, Nicolas, Argyriades, Jeremy, Blondel, Alain, Bravar, Alessandro, Ferrero, Andréa, Haesler, Alexis, Korzenev, Alexander, Murphy, Sébastien, and Ravonel Salzgeber, Melody

Subjects
Nuclear and High Energy Physics, Particle physics, Proton, Physics::Instrumentation and Detectors, Hadron, Nuclear Theory, FOS: Physical sciences, ddc:500.2, 7. Clean energy, 01 natural sciences, NA61, CERN, SPS, proton Carbon, 31GeV, Kaon, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, Nuclear interaction length, 010306 general physics, Neutrino oscillation, Nuclear Experiment, Physics, 010308 nuclear & particles physics, T2K experiment, 3. Good health, High Energy Physics::Experiment, Neutrino, Electron neutrino, Particle Physics - Experiment
Abstract

Spectra of positively charged kaons in p+C interactions at 31 GeV/c were measured with the NA61/SHINE spectrometer at the CERN SPS. The analysis is based on the full set of data collected in 2007 with a graphite target with a thickness of 4% of a nuclear interaction length. Interaction cross sections and charged pion spectra were already measured using the same set of data. These new measurements in combination with the published ones are required to improve predictions of the neutrino flux for the T2K long baseline neutrino oscillation experiment in Japan. In particular, the knowledge of kaon production is crucial for precisely predicting the intrinsic electron neutrino component and the high energy tail of the T2K beam. The results are presented as a function of laboratory momentum in 2 intervals of the laboratory polar angle covering the range from 20 up to 240 mrad. The kaon spectra are compared with predictions of several hadron production models. Using the published pion results and the new kaon data, the K+/\pi+ ratios are computed., Comment: 10 pages, 11 figures

Published
2012

17. Energy dependence of identified hadron spectra and event-by-event fluctuations in p+p interactions from NA61/SHINE at the CERN SPS

Author

Rybczyński, M., Abgrall, N., Aduszkiewicz, A., Ali, Y., Anticic, T., Antoniou, N., Argyriades, J., Baatar, B., Blondel, A., Blumer, J., Bogomilov, M., Bravar, A., Brooks, W., Brzychczyk, J., Bubak, A., Bunyatov, S. A., Busygina, O., Christakoglou, P., Czopowicz, T., Davis, N., Debieux, S., Dembinski, H., Diakonos, F., Di Luise, S., Dominik, W., Drozhzhova, T., Dumarchez, J., Dynowski, K., Engel, R., Ereditato, A., Esposito, L., Feofilov, G. A., Fodor, Z., Ferrero, A., Fulop, A., Gázdzicki, M., Golubeva, M., Grabez, B., Grebieszkow, K., Grzeszczuk, A., Guber, F., Hakobyan, H., Hasegawa, T., Hierholzer, M., Idczak, R., Igolkin, S., Ivanov, Y., Ivashkin, A., Jokovic, D., Kadija, K., Athanasios Kapoyannis, Katrynska, N., Kaptur, E., Kielczewska, D., Kikola, D., Kirejczyk, M., Kisiel, J., Kiss, T., Kleinfelder, S., Kobayashi, T., Kolesnikov, V. I., Kolev, D., Kondratiev, V. P., Korzenev, A., Kowalski, S., Krasnoperov, A., Kuleshov, S., Kurepin, A., Larsen, D., Laszlo, A., Lyubushkin, V. V., Mackowiak-Pawlowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Maletic, D., Marchionni, A., Marcinek, A., Marin, V., Marton, K., Mathes, H. -J, Matulewicz, T., Matveev, V., Melkumov, G. L., Mrówczyński, St, Murphy, S., Nakadaira, T., Nirkko, M., Nishikawa, K., Palczewski, T., Palla, G., Panagiotou, A. D., Paul, T., Pistillo, C., Redij, A., Peryt, W., Petukhov, O., Planeta, R., Pluta, J., Popov, B. A., Posiadala, M., Puławski, S., Puzovic, J., Rauch, W., Ravonel, M., Renfordt, R., Robert, A., Röhrich, D., Rondio, E., Roth, M., Rubbia, A., Rustamov, A., Rybczynski, M., Sadovsky, A., Sakashita, K., Savic, M., Sekiguchi, T., Seyboth, P., Shibata, M., Sipos, R., Skrzypczak, E., Slodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Stroebele, H., Susa, T., Szuba, M., Tada, M., Tereshchenko, V., Tolyhi, T., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Vassiliou, M., Veberic, D., Vechernin, V. V., Vesztergombi, G., Vinogradov, L., Wilczek, A., Wlodarczyk, Z., Wojtaszek, A., Wyszyński, O., Zambelli, L., and Zipper, W.

Subjects
Physics, Large Hadron Collider, Hadron, FOS: Physical sciences, Cosmic ray, Deconfinement, Particle identification, Ion, Nuclear physics, Rapidity, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Neutrino, Nuclear Experiment
Abstract

NA61/SHINE at the CERN SPS is a fixed-target experiment pursuing a rich physics program including measurements for heavy ion, neutrino and cosmic ray physics. The main goal of the ion program is to explore the most interesting $T, mu_{B}$ region of the phase diagram of strongly interacting matter. We plan to study the properties of the onset of deconfinement and to search for the signatures of the critical point. The search is performed by varying collision energy (13A-158A GeV/c) and system size (p+p, Be+Be, Ar+Ca, Xe+La). Thanks to its large acceptance and excellent particle identification capability NA61/SHINE is well suited for performing high-precision particle production measurements as well as for studying event-by-event fluctuations in p+p, p+nucleus and nucleus+nucleus collisions. Preliminary results on p+p interactions at 20, 31, 40, 80 and 158 GeV/c are presented. They include inclusive spectra of pi+, pi-, K- and protons as a function of transverse momentum/mass and rapidity as well as event-by-event fluctuations of transverse momentum, azimuthal angle and chemical composition. The new NA61 measurements are compared with the corresponding results of NA49 on central Pb+Pb collisions and with predictions of Monte Carlo models. Finally, the future plans of NA61/SHINE are summarised., 8 pages, 6 figures, talk given at Xth Quark Confinement and the Hadron Spectrum, October 8-12, 2012, TUM Campus Garching, Munich, Germany. Added information in the acknowledgment part

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