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3 results on '"R. Siemssen"'

1. Multiplicity and pseudorapidity distribution of photons in S+Au reaction at 200A GeV

Author

M. M. Aggarwal, A. L. S. Angelis, V. Antonenko, T. C. Awes, S. K. Badyal, C. Barlag, K. B. Bhalla, V. S. Bhatia, C. Blume, D. Bock, E.-M. Bohne, D. Bucher, A. Buijs, S. Chattopadhyay, A. Claussen, G. Clewing, A. C. Das, P. Devanand, P. Dönni, E. Durieux, M. R. Dutta Majumdar, S. Fokin, M. S. Ganti, S. Garpman, F. Geurts, T. K. Ghosh, R. Glasow, S. K. Gupta, H.-Å. Gustafsson, H. H. Gutbrod, M. Hartig, Xiaochun He, G. Hölker, M. Ippolitov, M. Izycki, S. Kachroo, R. Kamermans, K.-H. Kampert, K. Karadjev, B. W. Kolb, V. Kumar, I. Langbein, J. Langheinrich, A. Lebedev, H. Löhner, V. Manko, M. Martin, I. S. Mittra, H. Naef, S. K. Nayak, T. K. Nayak, S. Nikolaev, J. Nystrand, F. E. Obenshain, A. Oskarsson, I. Otterlund, T. Peitzmann, F. Plasil, M. Purschke, S. Raniwala, N. K. Rao, L. Rosselet, B. Roters, J. M. Rubio, S. Saini, S. Sambyal, R. Santo, H. R. Schmidt, T. Siemiarczuk, R. Siemssen, B. C. Sinha, S. Slegt, K. Söderström, N. Solomey, S. P. Sorensen, G. Stefanek, P. Steinhaeuser, E. Stenlund, A. Ster, D. Stüken, M. D. Trivedi, C. Twenhoefel, N. Van Eijndhoven, W. H. Van Heeringen, A. Vinogradov, Y. P. Viyogi, S. Weber, G. R. Young, and Research unit Nuclear & Hadron Physics

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, COLLISIONS, Large Hadron Collider, Photon, ION EXPERIMENT WA80, PERFORMANCE, Charged particle, REGION, Nuclear physics, ENERGY, Pseudorapidity, CERN, High Energy Physics::Experiment, Multiplicity (chemistry), CALORIMETER, Centrality, Nuclear Experiment, DETECTOR, Event generator, MID-RAPIDITY
Abstract

The photon multiplicity has been measured for the first time in S+Au collisions at 200A GeV over a wide pseudorapidity range (2.8{le}{eta}{le}5.2) employing a fine granularity preshower detector. The pseudorapidity density of photons increases with centrality, reaching {approximately}200 at the highest centrality studied. The results are compared with measurements of the charged particle multiplicity and with predictions of the VENUS event generator. {copyright} {ital 1998} {ital The American Physical Society}

Published
1998

2. Event by event measurement of〈pT〉of photons in S + Au collisions at 200 A·GeV

Author

M.M. Aggarwal, A.L.S. Angelis, V. Antonenko, T.C. Awes, S.K. Badyal, C. Barlag, K.B. Bhalla, V.S. Bhatia, C. Blume, D. Bock, E.-M. Bohne, D. Bucher, A. Buijs, S. Chattopadhyay, A. Claussen, G. Clewing, A.C. Das, null Devanand, P. Dönni, E. Durieux, M.R. Dutta Majumdar, S. Fokin, M.S. Ganti, S. Garpman, F. Geurts, T.K. Ghosh, R. Glasow, S.K. Gupta, H.-Å. Gustafsson, H.H. Gutbrod, M. Hartig, He Xiaochun, G. Hölker, M. Ippolitov, M. Izycki, S. Kachroo, R. Kamermans, K.-H. Kampert, K. Karadjev, B.W. Kolb, I. Langbein, J. Langheinrich, A. Lebedev, H. Löhner, V. Manko, M. Martin, I.S. Mittra, H. Naef, S.K. Nayak, T.K. Nayak, S. Nikolaev, J. Nystrand, F.E. Obenshain, A. Oskarsson, I. Otterlund, T. Peitzmann, F. Plasil, M. Purschke, S. Raniwala, N.K. Rao, L. Rosselet, B. Roters, J.M. Rubio, S. Saini, S. Sambyal, R. Santo, H.R. Schmidt, T. Siemiarczuk, R. Siemssen, B.C. Sinha, S. Slegt, K. Söderström, N. Solomey, S.P. Sorensen, G. Stefanek, P. Steinhaeuser, E. Stenlund, A. Ster, D. Stüken, M.D. Trivedi, C. Twenhoefel, N. Van Eijndhoven, W.H. Van Heeringen, A. Vinogradov, Y.P. Viyogi, S. Weber, G.R. Young, Angelis, Aris, Donni, Paul, Durieux, Eric Marie Geoffroy, Martin, Michel, Naef, Hanspeter, Rosselet, Laurent, Rubio, Juan Miguel, and Solomey, Nickolas

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, Large Hadron Collider, biology, Venus, ddc:500.2, biology.organism_classification, Spectral line, Nuclear physics, Transverse plane, Transverse momentum, Multiplicity (chemistry), Nuclear Experiment, Event generator
Abstract

The mean transverse momentum of photons has been determined on an event by event basis in S + Au collisions at 200 A.GeV from the ratio of the measured electromagnetic transverse energy (E-T(em)) to the photon multiplicity (N-gamma). The average value obtained is similar to that determined for the same system using spectroscopic techniques. The centrality dependence of the measured values are in agreement with the predictions of the VENUS event generator. (C) 1997 Published by Elsevier Science B.V.

Published
1997

3. Soft photon production in central 200 GeV/nucleon $^{32}S$ + Au collisions

Author

M. M. Aggarwal, A. L. S. Angelis, V. Antonenko, T. C. Awes, S. K. Badyal, C. Barlag, K. B. Bhalla, V. S. Bhatia, C. Blume, D. Bock, E.-M. Bohne, D. Bucher, A. Buijs, S. Chattopadhyay, A. Claussen, G. Clewing, A. C. Das, L. Devanand, P. Dönni, E. Durieux, M. R. Dutta Majumdar, P. Foka, S. Fokin, M. S. Ganti, S. Garpman, F. Geurts, T. K. Ghosh, R. Glasow, S. K. Gupta, H.-Å. Gustafsson, H. H. Gutbrod, M. Hartig, He Xiaochun, G. Hölker, M. Ippolitov, M. Izycki, S. Kachroo, H. Kalechofsky, R. Kamermans, K.-H. Kampert, K. Karadjev, B. W. Kolb, V. Kumar, I. Langbein, J. Langheinrich, A. Lebedev, H. Löhner, S. Lokanathan, V. Manko, M. Martin, I. S. Mittra, S. Mookerjee, H. Naef, S. K. Nayak, S. Nikolaev, J. Nystrand, F. E. Obenshain, A. Oskarsson, I. Otterlund, T. Peitzmann, F. Plasil, M. Purschke, S. Raniwala, N. K. Rao, L. Rosselet, B. Roters, J. M. Rubio, S. Saini, S. S. Sambyal, R. Santo, H. R. Schmidt, T. Siemiarczuk, R. Siemssen, B. C. Sinha, S. Slegt, K. Söderström, N. Solomey, S. P. Sorensen, G. Stefanek, P. Steinhaeuser, E. Stenlund, A. Ster, D. Stüken, M. D. Trivedi, C. Twenhoefel, N. van Eijndhoven, E. van Heeringen, A. Vinogradov, Y. P. Viyogi, S. Weber, G. R. Young, Angelis, Aris, Donni, Paul, Durieux, Eric Marie Geoffroy, Foka, Panagiota, Kalechofsky, Hal, Martin, Michel, Naef, Hanspeter, Rosselet, Laurent, Rubio, Juan Miguel, Solomey, Nickolas, and Research unit Nuclear & Hadron Physics

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Soft photon, Photon, Large Hadron Collider, Meson, Nuclear Theory, Hadron, ddc:500.2, Nuclear physics, Transverse plane, High Energy Physics::Experiment, Production (computer science), CALORIMETER, Nuclear Experiment, Nucleon, Particle Physics - Experiment
Abstract

Inclusive photons of low transverse momenta have been measured in 200 GeV/nucleon {sup 32}S+Au collisions at the CERN SPS. Data were taken in the WA93 experiment using a small acceptance BGO detector with longitudinal segmentation. The results are compared to WA80 measurements for the same system and results from hadron decay calculations. An excess of soft photons over the expectations from neutral meson decays is observed. {copyright} {ital 1997} {ital The American Physical Society}

Published
1997

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