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2 results on '"G.J v. Nieuwenhuizen"'

1. Elliptic emission of K+ and π+ in 158 A·GeV Pb + Pb collisions

Author

M.M. Aggarwal, A. Agnihotri, Z. Ahammed, A.L.S. Angelis, V. Antonenko, V. Arefiev, V. Astakhov, V. Avdeitchikov, T.C. Awes, P.V.K.S. Baba, S.K. Badyal, A. Baldine, L. Barabach, C. Barlag, S. Bathe, B. Batiounia, T. Bernier, K.B. Bhalla, V.S. Bhatia, C. Blume, R. Bock, E.-M. Bohne, Z. Böröcz, D. Bucher, A. Buijs, H. Büsching, L. Carlen, V. Chalyshev, S. Chattopadhyay, R. Cherbatchev, T. Chujo, A. Claussen, A.C. Das, M.P. Decowski, H. Delagrange, V. Djordjadze, P. Donni, I. Doubovik, S. Dutt, M.R. Dutta Majumdar, K. El Chenawi, S. Eliseev, K. Enosawa, P. Foka, S. Fokin, V. Frolov, M.S. Ganti, S. Garpman, O. Gavrishchuk, F.J.M. Geurts, T.K. Ghosh, R. Glasow, S.K. Gupta, B. Guskov, H.Å. Gustafsson, H.H. Gutbrod, R. Higuchi, I. Hrivnacova, M. Ippolitov, H. Kalechofsky, R. Kamermans, K.-H. Kampert, K. Karadjev, K. Karpio, S. Kato, S. Kees, B.W. Kolb, I. Kosarev, I. Koutcheryaev, T. Krümpel, A. Kugler, P. Kulinich, M. Kurata, K. Kurita, N. Kuzmin, I. Langbein, A. Lebedev, Y.Y. Lee, H. Löhner, L. Luquin, D.P. Mahapatra, V. Manko, M. Martin, G. Martı́nez, A. Maximov, R. Mehdiyev, G. Mgebrichvili, Y. Miake, D. Mikhalev, Md.F. Mir, G.C. Mishra, Y. Miyamoto, D. Morrison, B. Mohanty, D.S. Mukhopadhyay, V. Myalkovski, H. Naef, B.K. Nandi, S.K. Nayak, T.K. Nayak, S. Neumaier, A. Nianine, V. Nikitine, S. Nikolaev, P. Nilsson, S. Nishimura, P. Nomokonov, J. Nystrand, F.E. Obenshain, A. Oskarsson, I. Otterlund, M. Pachr, A. Parfenov, S. Pavliouk, T. Peitzmann, V. Petracek, F. Plasil, W. Pinganaud, M.L. Purschke, B. Raeven, J. Rak, R. Raniwala, S. Raniwala, V.S. Ramamurthy, N.K. Rao, F. Retiere, K. Reygers, G. Roland, L. Rosselet, I. Roufanov, C. Roy, J.M. Rubio, H. Sako, S.S. Sambyal, R. Santo, S. Sato, H. Schlagheck, H.-R. Schmidt, Y. Schutz, G. Shabratova, T.H. Shah, I. Sibiriak, T. Siemiarczuk, D. Silvermyr, B.C. Sinha, N. Slavine, K. Söderström, N. Solomey, S.P. Sørensen, P. Stankus, G. Stefanek, P. Steinberg, E. Stenlund, D. Stüken, M. Sumbera, T. Svensson, M.D. Trivedi, A. Tsvetkov, L. Tykarski, J. Urbahn, E.C. v.d. Pijll, N. v. Eijndhoven, G.J. v. Nieuwenhuizen, A. Vinogradov, Y.P. Viyogi, A. Vodopianov, S. Vörös, B. Wysłouch, K. Yagi, Y. Yokota, and G.R. Young

Subjects
Nuclear physics, Azimuth, Physics, Nuclear and High Energy Physics, Meson, Angular correlation, Plane (geometry), Astrophysics::High Energy Astrophysical Phenomena, Anisotropic flow, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment
Abstract

An event-by-event analysis of the azimuthal angular correlation with respect to the reaction plane has been carried out for K+ and pi(+) emission near mid-rapidity in 158 A . GeV Pb + Pb collisions. In semi-central collisions, K+ mesons are found to be preferentially emitted out of the reaction plane, while pi(+) mesons are emitted in the reaction plane. The results suggest that the kaon emission is influenced by in-medium potential effects in addition to collective flow effects. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

Published
1999

2. Search for disoriented chiral condensates in 158 AGeV Pb+Pb collisions

Author

M.M Aggarwal, A Agnihotri, Z Ahammed, A.L.S Angelis, V Antonenko, V Arefiev, V Astakhov, V Avdeitchikov, T.C Awes, P.V.K.S Baba, S.K Badyal, A Baldine, L Barabach, C Barlag, S Bathe, B Batiounia, T Bernier, K.B Bhalla, V.S Bhatia, C Blume, R Bock, E.-M Bohne, D Bucher, A Buijs, E.-J Buis, H Büsching, L Carlen, V Chalyshev, S Chattopadhyay, R Cherbatchev, T Chujo, A Claussen, A.C Das, M.P Decowski, V Djordjadze, P Donni, I Doubovik, M.R Dutta Majumdar, K El Chenawi, S Eliseev, K Enosawa, P Foka, S Fokin, V Frolov, M.S Ganti, S Garpman, O Gavrishchuk, F.J.M Geurts, T.K Ghosh, R Glasow, S.K Gupta, B Guskov, H.A Gustafsson, H.H Gutbrod, R Higuchi, I Hrivnacova, M Ippolitov, H Kalechofsky, R Kamermans, K.-H Kampert, K Karadjev, K Karpio, S Kato, S Kees, H Kim, B.W Kolb, I Kosarev, I Koutcheryaev, A Kugler, P Kulinich, V Kumar, M Kurata, K Kurita, N Kuzmin, I Langbein, A Lebedev, Y.Y Lee, H Löhner, L Luquin, D.P Mahapatra, V Manko, M Martin, A Maximov, R Mehdiyev, G Mgebrichvili, Y Miake, D Mikhalev, G.C Mishra, Y Miyamoto, D Morrison, D.S Mukhopadhyay, V Myalkovski, H Naef, B.K Nandi, S.K Nayak, T.K Nayak, S Neumaier, A Nianine, V Nikitine, S Nikolaev, S Nishimura, P Nomokonov, J Nystrand, F.E Obenshain, A Oskarsson, I Otterlund, M Pachr, A Parfenov, S Pavliouk, T Peitzmann, V Petracek, F Plasil, M.L Purschke, B Raeven, J Rak, S Raniwala, V.S Ramamurthy, N.K Rao, F Retiere, K Reygers, G Roland, L Rosselet, I Roufanov, C Roy, J.M Rubio, H Sako, S.S Sambyal, R Santo, S Sato, H Schlagheck, H.-R Schmidt, G Shabratova, I Sibiriak, T Siemiarczuk, B.C Sinha, N Slavine, K Söderström, N Solomey, S.P Sørensen, P Stankus, G Stefanek, P Steinberg, E Stenlund, D Stüken, M Sumbera, T Svensson, M.D Trivedi, A Tsvetkov, C Twenhöfel, L Tykarski, J Urbahn, N v. Eijndhoven, W.H v. Heeringen, G.J v. Nieuwenhuizen, A Vinogradov, Y.P Viyogi, A Vodopianov, S Vörös, M.A Vos, B Wysłouch, K Yagi, Y Yokota, G.R Young, and Research unit Nuclear & Hadron Physics

Subjects
Physics, Nuclear and High Energy Physics, Chiral symmetry, Particle physics, SIMPLE (dark matter experiment), Phase transition, Large Hadron Collider, Photon, Hadron, Nuclear Theory, FOS: Physical sciences, Central region, QCD, High Energy Physics - Experiment, ENERGY, High Energy Physics - Experiment (hep-ex), Pion, CERN, PHASE-TRANSITION, Nuclear Experiment, DETECTOR, Particle Physics - Experiment
Abstract

The restoration of chiral symmetry and its subsequent breaking through a phase transition has been predicted to create regions of Disoriented Chiral Condensates (DCC). This phenomenon has been predicted to cause anomalous fluctuations in the relative production of charged and neutral pions in high-energy hadronic and nuclear collisions. The WA98 experiment has been used to measure charged and photon multiplicities in the central region of 158 AGeV Pb+Pb collisions at the CERN SPS. In a sample of 212646 events, no clear DCC signal can be distinguished. Using a simple DCC model, we have set a 90% C.L. upper limit on the maximum DCC production allowed by the data., 20 Pages, LaTeX, uses elsart.cls, 8 eps figures included, submitted to Physics Letters B

Published
1998

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