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22 results on '"A. L. S. Angelis"'

1. Formation of Centauro in Pb+Pb collisions at the LHC and their detection with the CASTOR detector of CMS

Author

M. Golubeva, V. V. Tiflov, S. A. Sadovsky, G. Mavromanolakis, E. Gładysz-Dziaduś, J. Bartke, K. Chileev, A. L. S. Angelis, A. B. Kurepin, Yu. V. Kharlov, T.L. Karavitcheva, Z. Wlodarczyk, X. Aslanoglou, F. Guber, and Apostolos Panagiotou

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Calorimeter (particle physics), Physics::Instrumentation and Detectors, Strangelet, High Energy Physics::Phenomenology, Nuclear Theory, Cosmic ray, Atomic and Molecular Physics, and Optics, Nuclear physics, Baryon, Strange matter, Rapidity, Nuclear Experiment, CASTOR calorimeter
Abstract

We present a phenomenological model describing the formation of a Deconfined Quark Matter fireball in the very forward, baryon-rich rapidity region in nucleus-nucleus interactions, and its subsequent decay into baryons and possibly strangelets. The model explains the centauro events observed in cosmic ray data and the long-penetrating component frequently accompanying them, and makes predictions for the LHC. We describe the CASTOR calorimeter, a subdetector under consideration at the CMS experiment, to probe the very forward, baryon-rich rapidity region in Pb + Pb collisions at the LHC. The simulated response of the calorimeter to new effects is presented and its sensitivity is derived using a neural network technique.

Published
2003
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2. Formation and detection of centauro in Pb $plus$ Pb collisions at the LHC

Author

F.F. Guber, T.L. Karavitcheva, Z. Wlodarczyk, K. Chileev, A. B. Kurepin, M.B. Golubeva, E Gładysz-Dziadusa, J. Bartke, X. Aslanoglou, Apostolos Panagiotou, V. V. Tiflov, S. A. Sadovsky, G. Mavromanolakis, Yu. V. Kharlov, and A. L. S. Angelis

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Calorimeter (particle physics), Physics::Instrumentation and Detectors, Strangelet, High Energy Physics::Phenomenology, Nuclear Theory, Cosmic ray, matter, Baryon, Nuclear physics, Phenomenological model, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, CASTOR calorimeter
Abstract

We present a phenomenological model describing the formation of a quark-gluon plasma (QGP) fireball in the very forward, baryon-rich rapidity region in nucleus-nucleus interactions, and its subsequent decay into baryons and possibly strangelets. The model explains the centauro events observed in cosmic rays and the long-penetrating component frequently accompanying them, and makes predictions for the LHC. We describe the CASTOR calorimeter, a subdetector to probe the very forward, baryon-rich rapidity region in Pb + Pb collisions at the LHC. The simulated response of the calorimeter to new effects is presented and its sensitivity is derived using a neural network technique. Journal of Physics G-Nuclear and Particle Physics

Published
2002
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3. Centrality Dependence of Neutral Pion Production in158AGeVP208b+P208bCollisions

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. K. 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, 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, 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, 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, P. Nilsson, S. Nishimura, P. Nomokonov, J. Nystrand, F. E. Obenshain, A. Oskarsson, I. Otterlund, M. Pachr, A. Parfenov, S. Pavliouk, T. Pietzmann, V. Patracek, W. Pinanaud, F. Plasil, 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, G. Shabratova, 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, C. Twenhöfel, L. Tykarski, J. Urbahn, 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 reaction, Physics, Particle physics, Meson, Nuclear Theory, Hadron, General Physics and Astronomy, Elementary particle, Super Proton Synchrotron, Nuclear physics, Pion, Production (computer science), Nuclear Experiment, Nucleon
Abstract

The production of neutral pions in 158A GeV {sup 208}Pb+ {sup 208}Pb collisions has been studied in the WA98 experiment at the CERN Super Proton Synchrotron (SPS). Transverse momentum spectra are studied for the range 0.3{le}m{sub T}{minus}m{sub 0}{le}4.0 GeV /c . The results for central collisions are compared to various models. The centrality dependence of the neutral pion spectral shape and yield is investigated. An invariance of the spectral shape and a simple scaling of the yield with the number of participating nucleons is observed for centralities with greater than about 30thinspthinspparticipating nucleons. This is most naturally explained by assuming an equilibrated system. {copyright} {ital 1998} {ital The American Physical Society }

Published
1998
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4. CASTOR: A dedicated detector for the detection of centauros and strangelets at the LHC

Author

Apostolos D Panagiotou and Aris L S Angelis

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, Large Hadron Collider, Physics::Instrumentation and Detectors, Strangelet, Hadron, Detector, Charged particle, Baryon, Nuclear physics, Pseudorapidity, High Energy Physics::Experiment, Detectors and Experimental Techniques, Nuclear Experiment
Abstract

Under publication in J. Phys. G: Nucl. Part. Phys. 23 (1997) 2069-2080 We present a specialised detector system, CASTOR, which, as an integral part of the ALICE experiment, will cover the search for centauros and strangelets in central Pb+Pb collisions at the LHC. CASTOR will cover the very forward, baryon-rich pseudorapidity region 4.5≤eta≤6.2 and will consist of a charged particle multiplicity detector, a photon multiplicity detector and a calorimeter with electromagnetic and hadronic sections. The physics motivation is presented, along with simulation results and the detector design. The influence of the background on the identification of centauro-type events is discussed.

Published
1997
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5. A search for multiplicity fluctuations in high energy nucleus-nucleus collisions

Author

F. Lamarche, M. Kazuno, Kimio Niwa, N. DiGiacomo, W.E. Sondheim, Vincent Hedberg, Serge Smirnov, S. Di Liberto, Sverker Johansson, Ulf Mjörnmark, R. Heifetz, G. Beaudoin, S. Muraviev, N. Armenise, A.C. Breslin, Motoaki Miyanishi, S. Nilsson, M. Sekimoto, Paolo Giubellino, F. Piuz, Piergiorgio Cerello, P. Yepes, Matthias Neubert, Makoto Kobayashi, H. Beker, Kazuhito Tsukagoshi, D. Bettoni, B. Sellden, H. Shibuya, Gilbert Poulard, M. Clemen, M. Murray, H. Sletten, Y. Sirois, D.H. Davis, H. En'yo, G. London, Torsten Paul Ake Åkesson, B. Erlandsson, M. Nomura, B. A. Dolgoshein, Ulrich Goerlach, M. Nakamura, M. T. Muciaccia, Y. Umezawa, D. Lissauer, Göran Jarlskog, Franco Meddi, M. A. Mazzoni, R. C. E. Devenish, Francois Corriveau, P. L. McGaughey, J. R. Dodd, H. Tajima, B. V. Jacak, D.N. Tovee, B. Lörstad, M. J. Price, Richard Wigmans, C. Leroy, C.W. Fabjan, H. Kitamura, G. Romano, G. Rosa, A. L. S. Angelis, Y. M. Park, V. Sidorov, Peter Glassel, P. Aubry, N. Ushida, Venetios Polychronakos, I. Stumer, Hans Henrik Thodberg, J. Sunier, G. Baroni, I. Tserruya, H. Atherton, H. Kraner, A. Holscher, R. Haglund, S. Sartori, B. Collick, I. Blevis, M. J. Esten, M. L. McCubbin, K. Dederichs, L. A. Hamel, Yona Oren, L. Ramello, G. Grella, P. Depommier, Odette Benary, S. Nakanishi, E. Mazzucato, J. M. Beaulieu, W. E. Cleland, S. Dell'Uomo, A. Lounis, A. Gaidot, H. W. Van Hecke, A. Marzari-Chiesa, J. A. Thompson, G. Vasseur, H. W. Bartels, Peter Fischer, L. Šándor, K. Hoshino, Shigeki Aoki, J. P. Pansart, Alevtina Shmeleva, Massimo Masera, Jurgen Schukraft, Kazuma Nakazawa, D.C. Rahm, H. J. Specht, S. Dagan, Koichi Kodama, N. A. McCubbin, S. Almehed, S. Simone, Vladimir Tikhomirov, T. Ishigami, L. Olsen, V. Bisi, M. Seman, Y. Kobayashi, A. Drees, V. Kroh, A. Pfeiffer, H. Bøggild, K. Niu, J. Soltani, Rob Veenhof, Z. Fraenkel, and S. Watanabe

Subjects
Physics, Nuclear and High Energy Physics, High energy, HELIOS, Ioni ultrarelativistici, Heavy Ion Physics, Particle Physics, Nuclear physics, Transverse plane, medicine.anatomical_structure, heavy ions, multiplicity flictuations, medicine, Multiplicity (chemistry), Atomic physics, Nuclear Experiment, Nucleon, Nucleus, Particle Physics - Experiment
Abstract

A search for non-statistical fluctuations was performed in 200 GeV per nucleon oxygen and sulphur ion-emulsion interactions selected by a high transverse energy trigger. No clear signal of dynamical correlations or of unusual fluctuations was found.

Published
1990
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6. Inclusive negative particlep ⊥ spectra in p-nucleus and nucleus-nucleus collisions at 200 GeV per nucleon

Author

G. Beaudoin, M. L. McCubbin, K. Dederichs, Venetios Polychronakos, S. Di Liberto, A. Drees, E. Mazzucato, J. M. Beaulieu, A. Marzari-Chiesa, F. Gibrat-Debu, N. Di Giacomo, Sverker Johansson, V. Kroh, B. V. Jacak, Paolo Giubellino, V. Bisi, H. Kraner, Ulf Mjörnmark, H. W. Bartels, A. Pfeiffer, Torsten Paul Ake Åkesson, Franco Meddi, R. Heifetz, Jurgen Schukraft, H. Bøggild, Peter Glassel, P. Aubry, G. Rosa, A. Holscher, B. Sellden, S. Simone, P. Depommier, L. A. Hamel, D.C. Rahm, Peter Fischer, Richard Wigmans, Vladimir Tikhomirov, M. Clemen, S. Nilsson, M. Sekimoto, Hans Henrik Thodberg, H. Beker, Göran Jarlskog, N. A. McCubbin, B. Dogolshein, Vincent Hedberg, D. Bettoni, Odette Benary, C. Leroy, J. Soltani, Serge Smirnov, Massimo Masera, Francois Corriveau, L. Olsen, J. P. Pansart, P. Yepes, A. L. S. Angelis, I. Tserruya, H. J. Specht, H. Atherton, Y. M. Park, V. Sidorov, N. Armenise, P. L. McGaughey, S. Dell'Uomo, J. R. Dodd, R. Haglund, S. Dagan, D. Lissauer, Gilbert Poulard, I. Stumer, H. W. Van Hecke, M. A. Mazzoni, A. Lounis, R. C. E. Devenish, S. Muraviev, W. E. Cleland, M. Murray, Rob Veenhof, Z. Fraenkel, H. Sletten, S. Sunier, G. London, B. Erlandsson, H. En'yo, B. Lörstad, G. Romano, M. Seman, I. Ramello, Matthias Neubert, S. Almehed, B. Collick, I. Blevis, J. A. Thompson, G. Vasseur, Y. Sirois, F. Martelli, V. Tcherniatin, M. J. Esten, A. Gaidot, I. Riccati, Yona Oren, F. Lamarche, M. Prioe, W.E. Sondheim, L. Šándor, Alevtina Shmeleva, C.W. Fabjan, F. Piuz, U. Goerlach, and M. T. Muciaccia

Subjects
heavy ions, HELIOS, pt spectra, Physics, Particle physics, Physics and Astronomy (miscellaneous), Heavy Ion Physics, Particle Physics, Spectral line, Nuclear physics, medicine.anatomical_structure, medicine, Rapidity, Constant (mathematics), Nucleon, Engineering (miscellaneous), Nucleus, Particle Physics - Experiment
Abstract

The HELIOS experiment has measured inclusivep⊥ spectra of negative particles in the rapidity region 1.0 is found to be approximately constant up to the highest accessible values ofE⊥.

Published
1990
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7. Formation and identification of centauro and strangelets in nucleus-nucleus collisions at the LHC

Author

Apostolos D Panagiotou, S.A. Sadovsky, P. Stefanski, J. Bartke, S.N. Filippov, A. I. Maevskaya, E. Gladysz-Dziadus, A. B. Kurepin, Zbigniew Wlodarczyk, Yu. V. Kharlov, M. Yu. Bogolyubsky, G. Mavromanolakis, and A. L. S. Angelis

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Calorimeter (particle physics), Physics::Instrumentation and Detectors, Strangelet, Nuclear Theory, Hadron, Detector, Atomic and Molecular Physics, and Optics, Phase space, Phenomenological model, High Energy Physics::Experiment, ALICE (propellant), Nuclear Experiment
Abstract

The physics motivation for a very forward detector for the ALICE heavy ion experiment at the CERN LHC is discussed. A phenomenological model describing the formation and decay of a Centauro fireball in nucleus-nucleus collisions is presented. The CASTOR detector which is aimed to measure the hadronic and photonic content of an interaction and to identify deeply penetrating objects in the very forward, baryon-rich phase space 5.6 < eta < 7.2 in an event-by-event mode is described. Results of simulations of the expected response of the calorimeter, and in particular to the passage of strangelets, are presented.

Published
1999
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8. 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

9. 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

10. A study of electron-muon pair production in 450 GeV/c pBe collisions

Author

P. Yepes, Torsten Paul Ake Åkesson, Gilbert Poulard, H. En'yo, B. Erlandsson, N. DiGiacomo, G. Rosa, M. A. Mazzoni, Vincent Hedberg, Serge Smirnov, A. Shikonian, Göran Jarlskog, Odette Benary, H.W. Kraner, E. Stern, Y. Golubkov, Richard Wigmans, Francois Corriveau, W. J. Willis, Paolo Giubellino, A. Holscher, H. Beker, H. Atherton, P. L. McGaughey, J. R. Dodd, Venetios Polychronakos, R. Haglund, L. Riccati, L. Šándor, A. Lounis, M. Clemen, M. J. Price, L. A. Hamel, B. V. Jacak, E. Mazzucato, J. M. Beaulieu, M. Murray, S. Eidelman, P. Nevski, H. Sletten, S. Almehed, Franco Meddi, Alevtina Shmeleva, P. Pomianowski, W. E. Cleland, L. Ramello, J. A. Thompson, G. Vasseur, F. Martelli, C.W. Fabjan, J. Sunier, F. Piuz, D. Lissauer, P. Depommier, Rob Veenhof, Peter Glassel, P. Aubry, M. L. McCubbin, C. Leroy, H. W. Van Hecke, S. Muraviev, K. Dederichs, A. L. S. Angelis, A. Marzari-Chiesa, Y. M. Park, B. Lörstad, V. Sidorov, G. Romano, Yona Oren, I. Stumer, H. W. Bartels, A. Gaidot, C. M. Valine, F. Gibrat-Debu, H. J. Specht, Peter Fischer, A. Vanyashin, M. T. Muciaccia, B. Collick, Gilles Beaudoin, G. London, J. Antos, Ulrich Goerlach, B. A. Dolgoshein, Vladimir Tikhomirov, S. Johannson, L. Olsen, Matthias Neubert, A. Sumarokov, Y. Sirois, D. Bettoni, S. Nilsson, M. Sekimoto, J. P. Pansart, I. Blevis, N. A. McCubbin, V. Bisi, Ulf Mjörnmark, R. Heifetz, S. Dagan, V. Tcherniatin, M. J. Esten, M. Seman, S. Simone, A. Drees, V. Kroh, A. Pfeiffer, H. Bøggild, S. DiLiberto, F. Lamarche, Jurgen Schukraft, D.C. Rahm, W. E. Sondheim, and Massimo Masera

Subjects
Physics, Semileptonic decay, Particle physics, Muon, Missing energy, Physics and Astronomy (miscellaneous), Nuclear physics, Particle decay, Pair production, Antimatter, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, Particle Physics - Experiment, Lepton
Abstract

We report on the production of $e^{\pm}\mu^{\mp}$ pairs in 450 GeV/c pBe collisions at the CERN SPS. The $e\mu$ signal, which has average missing energy of 21~GeV, is shown to be consistent with expectations from charm decay, and implies a $\sigma\times B$ for $c\overline{c}$ production in p-nucleon collisions of $0.63\pm 0.28 \mu b$. Alternatively, using an estimate of charm production from other experiments, the data imply a 95\% confidence level upper limit of 0.88$\mu b$ on any new physics process which produces $e^{\pm}\mu^{\mp}$.

Published
1996

11. Low-mass lepton-pair production in p-Be collisions at 450 GeV/c

Author

F. Gibrat-Debu, Torsten Paul Ake Åkesson, Yona Oren, H. Atherton, R. Haglund, P. Nevski, L. Šándor, Alevtina Shmeleva, Paolo Giubellino, S. Simone, C.W. Fabjan, S. Eidelman, H. En'yo, B. Lörstad, G. Romano, F. Lamarche, V. Tcherniatin, Rob Veenhof, F. Martelli, M. J. Esten, P. Yepes, Peter Glassel, P. Aubry, E. Stern, A. Drees, Francois Corriveau, Ulf Mjörnmark, Jurgen Schukraft, P. L. McGaughey, V. Kroh, J. R. Dodd, M. L. McCubbin, R. Heifetz, D.C. Rahm, Gilbert Poulard, G. Rosa, B. Collick, Gilles Beaudoin, W. E. Sondheim, A. Pfeiffer, M. J. Price, M. T. Muciaccia, K. Dederichs, H. Bøggild, S. DiLiberto, M. Clemen, I. Blevis, M. Seman, M. A. Mazzoni, S. Dagan, Massimo Masera, A. Sumarokov, F. Piuz, M. Murray, A. Marzari-Chiesa, H. Sletten, H. W. Bartels, B. Erlandsson, H. J. Specht, D. Lissauer, J. Sunier, E. Mazzucato, Richard Wigmans, J. M. Beaulieu, C. Leroy, Peter Fischer, Matthias Neubert, A. Gaidot, Y. Sirois, A. Vanyashin, H. Beker, W. J. Willis, A. Holscher, A. L. S. Angelis, L. Riccati, Y. M. Park, V. Sidorov, L. A. Hamel, I. Stumer, S. Muraviev, Vladimir Tikhomirov, S. Johannson, L. Olsen, S. Almehed, J. A. Thompson, G. Vasseur, N. DiGiacomo, Vincent Hedberg, Serge Smirnov, B. V. Jacak, P. Pomianowski, G. London, J. Antos, Ulrich Goerlach, Franco Meddi, N. A. McCubbin, V. Bisi, L. Ramello, S. Nilsson, M. Sekimoto, P. Depommier, J. P. Pansart, Odette Benary, Y. Golubkov, B. A. Dolgoshein, A. Lounis, H. W. Van Hecke, A. Shikonian, Göran Jarlskog, Venetios Polychronakos, W. E. Cleland, H. Kraner, D. Bettoni, 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 Heyd, Yvette

Subjects
Physics, Electron pair, Particle physics, Muon, Large Hadron Collider, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Hadron, Elementary particle, Electron, Nuclear physics, Pair production, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment, Lepton
Abstract

We report on the production of low-mass electron pairs and muon pairs in p-Be collisions at 450 GeV/c at the CERN SPS. For both electron and muon pairs the low-mass spectrum can be explained satisfactorily by lepton pairs from hadronic decays, and there is no need to invoke any “unconventional” source. The normalisation of the major hadronic sources is set by the data. The upper limit, at 90% confidence level, on any new source of lepton pairs is ∼20% of the hadronic decay contribution for muons, and ∼40% for electrons.

Published
1995

12. Kaon production in 200-GeV/nucleon nucleus-nucleus collisions

Author

A. Holscher, V. Tcherniatin, B. Sellden, L. A. Hamel, M. J. Esten, E. Mazzucato, J. M. Beaulieu, B. V. Jacak, N. Armenise, C. Leroy, S. Dagan, A. L. S. Angelis, Y. M. Park, V. Sidorov, S. Nilsson, F. Gibrat-Debu, B. Lörstad, Venetios Polychronakos, Göran Jarlskog, Paolo Giubellino, G. Romano, I. Tserruya, M. Sekimoto, E. Stern, H. Atherton, Matthias Neubert, W.E. Sondheim, R. Haglund, Yona Oren, H. Kraner, Y. Sirois, Francois Corriveau, H. Bøggild, P. Yepes, N. DiGiacomo, Rob Veenhof, Z. Fraenkel, S. Simone, D. Bettoni, Gilbert Poulard, J. P. Pansart, Vincent Hedberg, Massimo Masera, P. L. McGaughey, J. R. Dodd, M. J. Price, Odette Benary, S. Di Liberto, Serge Smirnov, J. Sunier, Peter Glassel, P. Aubry, B. Erlandsson, Sverker Johansson, M. Clemen, A. Drees, M. L. McCubbin, A. Gaidot, Ulf Mjörnmark, K. Dederichs, V. Bisi, V. Kroh, R. Heifetz, A. Marzari-Chiesa, S. Dell'Uomo, Richard Wigmans, H. W. Bartels, N. A. McCubbin, Hans Henrik Thodberg, A. Pfeiffer, L. Ramello, A. Lounis, I. Stumer, S. Muraviev, Peter Fischer, J. Soltani, H. Beker, W. E. Cleland, L. Riccati, Franco Meddi, H. W. Van Hecke, H. En'yo, L. Šándor, D. Lissauer, M. Murray, H. Sletten, M. T. Muciaccia, Torsten Paul Ake Åkesson, S. Almehed, J. A. Thompson, G. Vasseur, G. Rosa, M. Seman, M. A. Mazzoni, Alevtina Shmeleva, R. C. E. Devenish, H. J. Specht, P. Depommier, C.W. Fabjan, F. Lamarche, Vladimir Tikhomirov, L. Olsen, Jurgen Schukraft, D.C. Rahm, F. Piuz, U. Goerlach, B. A. Dolgoshein, G. London, B. Collick, I. Blevis, Gilles Beaudoin, and F. Martelli

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Strange quark, Spectrometer, Nuclear Theory, Nuclear physics, medicine.anatomical_structure, medicine, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Nucleus, Beam energy, Particle Physics - Experiment
Abstract

Results from the HELIOS External Spectrometer on kaon production in 200 GeV/A S + W and p + W collisions are presented. The Kπ ratios are compared with results from a lower beam energy and are found to be remarkably similar. Evidence for secondary production of K+ by meson-baryon rescattering is reviewed. Our results at y = 1.0–1.5 are compared with neutral strange particle results at midrapidity.

Published
1992

13. A Search for weakly interacting neutral particles in missing energy events in 450-GeV/c p N collisions

Author

Venetios Polychronakos, H. Kraner, Paolo Giubellino, N. DiGiacomo, Franco Meddi, M. Clemen, Vincent Hedberg, Serge Smirnov, S. Nilsson, M. Sekimoto, L. Šándor, Torsten Paul Ake Åkesson, A. Shmeloeva, S. Muraviev, A. Drees, P. Nevski, C. Leroy, J. P. Pansart, M. Seman, V. Kroh, F. Lamarche, A. Pfeiffer, A. L. S. Angelis, Y. M. Park, E. Stern, B. V. Jacak, H. Bøggild, V. Bisi, Richard Wigmans, V. Sidorov, D. Lissauer, Francois Corriveau, Vladimir Tikhomirov, S. Johannson, S. DiLiberto, Ulf Mjörnmark, C.W. Fabjan, P. L. McGaughey, R. Heifetz, J. R. Dodd, A. Gaidot, L. Olsen, P. Yepes, M. J. Price, I. Stumer, Rob Veenhof, H. Atherton, H. Beker, V. Tcherniatin, A. Kalinovski, R. Haglund, S. Dagan, Peter Glassel, P. Aubry, A. Marzari-Chiesa, P. Pomianowski, H. En'yo, Gilbert Poulard, S. Almehed, G. Beaudoin, H. W. Bartels, L. Riccati, J. A. Thompson, M. J. Esten, G. Vasseur, Yona Oren, Peter Fischer, B. Erlandsson, N. A. McCubbin, F. Martelli, B. Lörstad, S. Simone, H. J. Specht, G. Romano, W.E. Sondheim, D. Bettoni, Matthias Neubert, M. A. Mazzoni, Y. Sirois, Jurgen Schukraft, G. Rosa, D.C. Rahm, Y. Murray, I. Blevis, H. Sletten, P. Depommier, Massimo Masera, J. Sunier, F. Gibrat-Debu, Odette Benary, W. J. Willis, A. Holscher, S. Dell'Uomo, A. Lounis, L. A. Hamel, F. Piuz, Göran Jarlskog, W. E. Cleland, B. A. Dolgoshein, M. T. Muciaccia, A. Nikitin, L. Ramello, H. W. Van Hecke, G. London, M. L. McCubbin, K. Dederichs, Ulrich Goerlach, E. Mazzucato, and J. M. Beaulieu

Subjects
Physics, Particle physics, Missing energy, Physics and Astronomy (miscellaneous), particle physics, weak interactions, Function (mathematics), Nuclear physics, Subatomic particle, Neutrino, Nuclear Experiment, Engineering (miscellaneous), Event (particle physics), Particle Physics - Experiment, Energy (signal processing)
Abstract

We have measured the inclusive cross-section as a function of missing energy, due to the production of neutrinos or new weakly interacting neutral particles in 450 GeV/c proton-nucleus collisions, using calorimetric measurements of visible event energy. Upper limits are placed on the production of new particles as a function of their energy. These upper limits are typically an order

Published
1991

14. Measurement of the transverse energy flow in nucleus-nucleus collisions at 200-GeV per nucleon

Author

B. V. Jacak, Torsten Paul Ake Åkesson, V. Kroh, A. Pfeiffer, H. Bøggild, G. Beaudoin, M. A. Mazzoni, L. Ramello, R. C. E. Devenish, W. E. Cleland, H. Beker, B. Sellden, E. Mazzucato, J. M. Beaulieu, Jurgen Schukraft, L. Riccati, Richard Wigmans, G. London, Ulrich Goerlach, C. Leroy, D.C. Rahm, H. W. Van Hecke, Rob Veenhof, Z. Fraenkel, A. L. S. Angelis, Y. M. Park, V. Sidorov, A. Marzari-Chiesa, H. W. Bartels, I. Stumer, Göran Jarlskog, G. Rosa, Venetios Polychronakos, Peter Fischer, J. Sunier, H. Kraner, K. Dederichs, M. Clemen, S. Simone, Peter Glassel, P. Aubry, W.E. Sondheim, A. Dress, Hans Henrik Thodberg, N. DiGiacomo, S. Dagan, V. Bisi, L. Šándor, A. Gaidot, P. Yepes, P. Depommier, S. Almehed, Paolo Giubellino, Vincent Hedberg, S. Nilsson, M. Sekimoto, Gilbert Poulard, J. A. Thompson, G. Vasseur, Serge Smirnov, S. Di Liberto, Odette Benary, Franco Meddi, Sverker Johansson, B. Erlandsson, Massimo Masera, H. J. Specht, J. P. Pansart, Francois Corriveau, Ulf Mjörnmark, R. Heifetz, S. Dell'Uomo, D. Lissauer, P. L. McGaughey, Alevtina Shmeleva, J. R. Dodd, A. Lounis, F. Lamarche, M. J. Price, N. A. McCubbin, B. Lörstad, M. Murray, H. Sletten, G. Romano, C.W. Fabjan, D. Bettoni, I. Tserruya, N. Armenise, H. Atherton, B. Collick, I. Blevis, R. Haglund, Matthias Neubert, F. Martelli, Y. Sirois, F. Gibrat-Debu, V. Tcherniatin, M. J. Esten, S. Muraviev, Yona Oren, W. J. Willis, A. Holscher, H. En'yo, L. A. Hamel, F. Piuz, B. A. Dolgoshein, M. T. Muciaccia, Vladimir Tikhomirov, L. Olsen, and M. Seman

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, Heavy Ion Physics, Nuclear Theory, Nuclear matter, transverse energy flow, Spectral line, Nuclear physics, Transverse plane, medicine.anatomical_structure, heavy-ions, Energy flow, multiplicity, medicine, Stopping power (particle radiation), High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Particle Physics, Nucleus, Particle Physics - Experiment
Abstract

Measurement of the transverse energy flow in nucleus-nucleus collisions at 200 GeV per nucleon

Published
1991

15. Charged-particle multiplicity distributions in oxygen-nucleus collisions at 60 and 200 GeV per nucleon

Author

Peter Glassel, P. Aubry, S. Dell'Uomo, I. Tserruya, H. Atherton, Hans Henrik Thodberg, G. Beaudoin, A. Lounis, A. Gaidot, N. DiGiacomo, B. Lörstad, G. Romano, R. Haglund, F. Corriveau, Vincent Hedberg, Boris Dolgoshein, B. Sellden, G. Rosa, M. T. Muciaccia, A. Marzari-Chiesa, Venetios Polychronakos, H. W. Bartels, S. Muraviev, E. Mazzucato, H. Beker, J. M. Beaulieu, K. Dederichs, Peter Fischer, L. Riccati, C. Leroy, M. Clemen, S. Dagan, Paolo Giubellino, H. J. Specht, A. Holscher, B. V. Jacak, J. Soltani, H. Kraner, L. Olsen, V. Bisi, A. L. S. Angelis, P. Depommier, Sergei Smirnov, Y. M. Park, V. Sidorov, J. Sunier, D. Bettoni, D. Lissauer, F. Lamarche, M. A. Mazzoni, F. Piuz, N. Armenise, I. Stumer, Franco Meddi, L. A. Hamel, M. L. McCubbin, G. Vasseur, R. C. E. Devenish, Massimo Masera, W.E. Sondheim, S. Nilsson, Z. Fraenkel, Matthias Neubert, V. Tikhomirov, L. Ramello, M. Sekimoto, Y. Sirois, P. Yepes, M. Murray, H. Sletten, Gilbert Poulard, Richard Wigmans, Jurgen Schukraft, J. P. Pansart, B. Erlandsson, D.C. Rahm, F. Gibrat-Debu, V. Tcherniatin, S. Simone, M. J. Esten, G. London, H. W. Van Hecke, P. L. McGaughey, Ulrich Goerlach, J. R. Dodd, M. Seman, H. En'yo, M. J. Price, V. Kroh, R. Veenhof, A. Pfeiffer, H. Bøggild, S. DiLiberto, Torsten Paul Ake Åkesson, A. Shmeleva, Sverker Johansson, S. Almehed, Ulf Mjörnmark, J. A. Thompson, R. Heifetz, F. Martelli, B. Collick, I. Blevis, Yona Oren, W. E. Cleland, L. Šándor, C.W. Fabjan, Göran Jarlskog, A. Dress, and Odette Benary

Subjects
Nuclear and High Energy Physics, Particle physics, HELIOS, Nuclear Theory, chemistry.chemical_element, Oxygen, Nuclear physics, medicine, multiplicity, Physics::Chemical Physics, Multiplicity (chemistry), Nuclear Experiment, heavy ions, Particle Physics, Physics, Heavy Ion Physics, Charged particle, medicine.anatomical_structure, Monte Carlo comparison, chemistry, High Energy Physics::Experiment, Nucleon, Nucleus, Particle Physics - Experiment
Abstract

Charged-particle multiplicity distributions in oxygen-nucleus collisions at 60 and 200 GeV per nucleon

Published
1990

16. Inclusive Photon Production in P a and A-a Collisions at 200-{GeV}/u

Author

C.W. Fabjan, I. Tserruya, H. Atherton, R. Haglund, G. Beaudoin, U. Goerlach, S. Nilsson, M. Sekimoto, A. Marzari-Chiesa, H. W. Bartels, L. Šándor, Sergei Smirnov, B. Sellden, M. J. Esten, J. P. Pansart, S. Muraviev, F. Lamarche, Yona Oren, Gilbert Poulard, V. Toherniatin, S. Dagan, M. A. Mazzoni, C. Leroy, Paolo Giubellino, E. Mazzucato, Peter Fischer, J. M. Beaulieu, Franco Meddi, R. C. E. Devenish, V. Sidoroy, B. Erlandsson, A. Holscher, Torsten Paul Ake Åkesson, M. T. Muciaccia, W. E. Cleland, A. L. S. Angelis, N. A. McCubbin, J. Soltani, Y. M. Park, S. Almehed, V. Kroth, I. Stumer, L. Ramello, V. Bisi, N. Armenise, Jurgen Schukraft, S. Simone, D.C. Rahm, Richard Wigmans, G. Vasseur, Odette Benary, J. A. Thompson, A. Shmeleva, L. A. Hamel, Z. Fraenkel, Matthias Neubert, A. Gaidot, L. Olsen, H. En'yo, F. Martelli, Göran Jarlskog, Y. Sirois, S. Di Liberto, V. Tikhomirov, A. Drees, B. Dogolshein, M. L. McCubbin, G. Rosa, R. Veenhoff, M. Murray, K. Dederichs, A. Pfeiffer, Sverker Johansson, S. Dell'Uomo, P. McGaughey, H. Bøggild, H. Sletten, A. Lounis, Francois Corriveau, J. R. Dodd, Ulf Mjörnmark, B. Collick, I. Blevis, F. Gibrat-Debu, R. Heifetz, M. J. Price, M. Seman, Peter Glassel, P. Aubry, H. J. Specht, J. Sunier, Hans Henrik Thodberg, H. W. Van Hecke, Massimo Masera, H. Beker, P. Depommier, P. Yepes, L. Riccati, W. Sondheim, Venetios Polychronakos, G. London, H. Kraner, B. Lörstad, G. Romano, M. Clemen, D. Bettoni, D. Lissauer, B. V. Jacak, N. DiGiacomo, Vincent Hedberg, and F. Piuz

Subjects
Nuclear reaction, Physics, Particle physics, Physics and Astronomy (miscellaneous), Proton, Meson, HELIOS, Heavy Ion Physics, Branching fraction, Hadron, photon spectra, Particle Physics, Charged particle, Nuclear physics, Particle decay, Pion, heavy ions, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

Inclusive photonp⊥ spectra were measured with 200 GeV/u proton,16O and32S beams on W and Pt targets, using a conversion method. The measurement of charged pions in the same apparatus allows a comparison of the γ data with the expected γ's from hadronic decays π0, η, η', ω). In all data sets, no deviation from the expected shape is observed in the range of 0.1 0.1 GeV/c andp⊥>0.6 GeV/c.

Published
1990

17. An emulsion study of 16O and 32S interactions at 200 GeV per nucleon selected by transverse energy

Author

A. Gaidot, W.E. Sondheim, Sergei Smirnov, F. Lamarche, M. Kazuno, H. Tajima, Paolo Giubellino, B. V. Jacak, Richard Wigmans, G. Beaudoin, M. L. McCubbin, K. Dederichs, V.A. Sidorov, P. Yepes, V. Bisi, Y. Kobayashi, V. Kroh, Boris Dolgoshein, Kazuhito Tsukagoshi, S. Nakanishi, Yona Oren, G. Rosa, A. Marzari-Chiesa, L. Ramello, N. DiGiacomo, H. W. Bartels, Gilbert Poulard, S. Nilsson, M. Sekimoto, H. J. Specht, A.C. Breslin, A. Pfeiffer, Franco Meddi, Vincent Hedberg, Peter Fischer, E. Mazzucato, J. M. Beaulieu, D. Bettoni, J. Soltani, Makoto Kobayashi, H. Beker, Jurgen Schukraft, B. Erlandsson, Kazuma Nakazawa, H. Bøggild, J. P. Pansart, B. Sellden, B. Collick, D.C. Rahm, I. Blevis, S. Di Liberto, L. Riccati, I. Tserruya, K. Niu, H. Atherton, Sverker Johansson, R. Haglund, K. Nakamura, S. Almehed, S. Sartori, Rob Veenhof, Z. Fraenkel, Massimo Masera, J. A. Thompson, G. Vasseur, C.W. Fabjan, S. Watanabe, Ulf Mjörnmark, S. Muraviev, F. Piuz, Odette Benary, M. Clemen, R. Heifetz, H. W. Van Hecke, C. Leroy, M. A. Mazzoni, S. Dagan, C. Sgarbi, A. Drees, R. C. E. Devenish, H. Kitamura, M. Nomura, Peter Glassel, P. Aubry, Koichi Kodama, Venetios Polychronakos, Motoaki Miyanishi, Francois Corriveau, A. L. S. Angelis, S. Dell'Uomo, Y. M. Park, D. Lissauer, Hans Henrik Thodberg, L. Šándor, A. Lounis, P. L. McGaughey, N. Ushida, I. Stumer, J. Sunier, G. Baroni, H. Shibuya, S. Simone, M. J. Price, B. Lörstad, H. Kraner, Shigeki Aoki, G. Romano, Kimio Niwa, M. Seman, Alevtina Shmeleva, Torsten Paul Ake Åkesson, J.R. Dodd, D.H. Davis, H. En'yo, G. London, G. Grella, Göran Jarlskog, D.N. Tovee, N. Armenise, K. Hoshino, P. Depommier, Ulrich Goerlach, Matthias Neubert, Vladimir Tikhomirov, T. Ishigami, Y. Sirois, L. Olsen, V. Tcherniatin, M. J. Esten, A. Holscher, L. A. Hamel, F. Gibrat-Debu, M. Murray, H. Sletten, M. T. Muciaccia, Y. Umezawa, and W. E. Cleland

Subjects
Nuclear reaction, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Nuclear Theory, Hadron, Elementary particle, Nuclear emulsions, Nuclear physics, multiplicity, heavy ions, Nuclear Experiment, Physics, Ioni ultrarelativistici, Heavy Ion Physics, Multiplicity (mathematics), Charged particle, hybrid experiment, transverse energy, Condensed Matter::Soft Condensed Matter, Transverse plane, Emulsion, High Energy Physics::Experiment, Nucleon, Particle Physics - Experiment
Abstract

An emulsion study of 16O and 32S interactions at 200 GeV per nucleon selected by transverse energy

Published
1990

18. Transverse energy distributions in16O-nucleus collisions

Author

B. Sellden, C. Leroy, A. L. S. Angelis, Y. M. Park, V. Sidorov, I. Stumer, Paolo Giubellino, J. Sunier, A. Marzari-Chiesa, H. W. Bartels, G. Romano, Peter Fischer, M. L. McCubbin, H. Ries, Francois Corriveau, J. Soltani, W. Sondheim, A. Dress, V. Tcherniatin, C.W. Fabjan, S. Dell'Uomo, J. R. Dodd, Odette Benary, M. A. Mazzoni, M. J. Price, N. Armenise, S. Nilsson, A. Gaidot, M. Sekimoto, B. V. Jacak, Yona Oren, J. M. Beaulieu, H. Hecke, Göran Jarlskog, M. Clemen, H. Kramer, H. En'yo, Gilbert Poulard, A. Lounis, I. Gavrilenko, A. Hölscher, Torsten Paul Ake Åkesson, J. P. Pansart, H. Beker, H. J. Specht, Matthias Neubert, A. Sumarokov, N. DiGiacomo, Z. Fraenkel, J. H. Bartley, L. Riccati, B. Erlandsson, Y. Sirois, K. Dederichs, A. Shmeleva, D. Bettoni, V. Tikhomirov, R. Roosen, D. Lissauer, Vincent Hedberg, V. Bisi, Sverker Johansson, Ulf Mjörnmark, Stephan J. Huber, M. J. Esten, R. Heifetz, P. T. Trent, B. Lörstad, N. A. McCubbin, J. Russ, Boris Dolgoshein, S. Almehed, A. Kalinovski, Peter Glassel, P. Aubry, J. A. Thompson, T. Ludlam, Sergei Smirnov, A. Kantserov, Hans Henrik Thodberg, F. Lamarche, F. Piuz, P. Shotton, R. Chechik, U. Goerlach, F.F. Heymann, G. Rosa, Richard Wigmans, P. Nevski, M. Faessler, M. Seman, W. E. Cleland, W. J. Willis, P. Depommier, L. A. Hamel, R.C.E. Devenish, V. Kroh, L. Olsen, A. Pfeiffer, P. McGaughey, H. Bøggild, S. DiLiberto, M. Murray, H. Sletten, S. Simone, S. Dagan, Franco Meddi, I. Tserruya, H. Atherton, R. Haglund, Amos Breskin, M. T. Muciaccia, Massimo Masera, Jurgen Schukraft, D.C. Rahm, B. Collick, I. Blevis, G. London, Venetios Polychronakos, S. Mayburov, F. Gibrat-Debu, L. Ramello, and G. Beaudoin

Subjects
Physics, Physics and Astronomy (miscellaneous), Nuclear Theory, Elementary particle, Quark gluon plasma, Nuclear physics, Transverse plane, medicine.anatomical_structure, Quark–gluon plasma, medicine, High Energy Physics::Experiment, Field theory (psychology), Quantum field theory, Nuclear Experiment, Nucleon, Particle Physics, Engineering (miscellaneous), Nucleus, Energy (signal processing)
Abstract

Transverse-energy distributions have been measured in the pseudo-rapidity region −0.1 >ηlab

Published
1988

19. Status report on experiment R-108

Author

H. J. Besch, A. L. S. Angelis, and R.L. Cool

Subjects
Physics, Nuclear physics, Electron pair, Particle physics, Pion, Meson, Hadron, Transverse momentum, High Energy Physics::Experiment, Elementary particle, Nuclear Experiment, Status report, Boson
Abstract

A summary is presented of the status of experiment R-108 at the ISR. Electron pairs and neutral pion transverse momentum are noted. 6 references. (JFP)

Published
1978
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20. The transverse energy distribution in16O-nucleus collisions at 60 and 200 GeV per nucleon

Author

M. Clemen, M. J. Esten, D. Bettoni, Franco Meddi, D. Lissauer, M. Faessler, C. Leroy, Paolo Giubellino, S. Dell'Uomo, M. A. Mazzoni, P. Shotton, V. Bisi, R.C.E. Devenish, A. L. S. Angelis, Y. M. Park, V. Sidorov, F.F. Heymann, R. Chechik, J. M. Beaulieu, Torsten Paul Ake Åkesson, I. Stumer, P. Depommier, A. Gaidot, G. Jarslkog, H. Beker, Venetios Polychronakos, W. J. Willis, A. Holscher, H. En'yo, Odette Benary, B. Lörstad, C.W. Fabjan, A. Sumarokov, L. Riccati, Richard Wigmans, V. Kroh, V. Tcherniatin, L. A. Hamel, A. Marzari-Chiesa, G. Beaudoin, K. Dederichs, S. Nilsson, M. Sekimoto, I. Tserruya, A. Pfeiffer, H. Atherton, F. Piuz, Massimo Masera, A. Lounis, N. Armenise, R. Haglund, H. Kraner, H. W. Bartels, Gilbert Poulard, P. McGaughey, H. Bøggild, G. Romano, Francois Corriveau, I. Gavrilenko, Matthias Neubert, Yona Oren, Sergei Smirnov, B. Erlandsson, T. Ludlam, S. Almehed, Y. Sirois, N. Di Giacomo, J. P. Pansart, B. Sellden, F. Lamarche, G. Rosa, S. Dagan, J. R. Dodd, U. Goerlach, Peter Fischer, J. A. Thompson, Jurgen Schukraft, S. Mayburov, D.C. Rahm, M. J. Price, J. Russ, J. Sunier, J. Soltani, S. Simone, P. Nevski, M. L. McCubbin, M. Seman, N. A. McCubbin, L. Ramello, H. J. Specht, Z. Fraenkel, H. W. Van Hecke, L. Olsen, Amos Breskin, V. Tikhomirov, G. London, Boris Dolgoshein, M. Murray, H. Sletten, F. Gibrat-Debu, A. Shmeleva, R. Roosen, S. Di Liberto, Sverker Johansson, Ulf Mjörnmark, Stephan J. Huber, R. Heifetz, A. Kantserov, W. E. Cleland, W. Sondheim, A. Dress, B. Collick, I. Blevis, B. V. Jacak, J. H. Bartley, M. T. Muciaccia, Vincent Hedberg, P. T. Trent, H. Ries, A. Kalinovski, Peter Glassel, P. Aubry, and Hans Henrik Thodberg

Subjects
Physics, Nuclear reaction, Particle physics, Physics and Astronomy (miscellaneous), Heavy Ion Physics, Nuclear Theory, Carbon-12, Parton, Alpha particle, Charged particle, Nuclear physics, Orders of magnitude (time), Pseudorapidity, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

Transverse-energy distributions have been measured in the pseudorapidity region −0.12.9 decreases with increasingA. The distributions are compared with the predictions of a dual parton model. Finally the question of the energy density is addressed.

Published
1988

21. The Transverse Energy Distributions Of S-32 Nucleus Collisions At 200-gev Per Nucleon

Author

S. Simone, P. Shotton, Paolo Giubellino, Yona Oren, A. Kantserov, A. Kalinovski, Peter Glassel, P. Aubry, M. Sekimoto, Hans Henrik Thodberg, Franco Meddi, R. Haglund, B. Sellden, S. Dell'Uomo, A. Drees, Venetios Polychronakos, Gilbert Poulard, Torsten Paul Ake Åkesson, Richard Wigmans, G. Vasseur, M. L. McCubbin, N. Armenise, J. P. Pansart, Z. Fraenkel, S. Muraviev, B. Erlandsson, N. A. McCubbin, C. Leroy, H. Kramer, V. Kroh, F. Piuz, V. Tikhomirov, G. London, I. Gavrilenko, Matthias Neubert, A. L. S. Angelis, Jurgen Schukraft, G. Beaudoin, P. Depommier, P. Nevski, C.W. Fabjan, V. Bisi, J. Russ, D.C. Rahm, Y. Sirois, G. Jarlskog, M. T. Muciaccia, Y. M. Park, V. Sidorov, I. Stumer, L. Ramello, I. Tserruya, A. Pfeiffer, H. Atherton, M. Seman, U. Goerlach, M. Murray, M. Masera, Sergei Smirnov, F. Lamarche, V. Tcherniatin, H. Sletten, S. Dagan, P. McGaughey, H. Bøggild, M. A. Mazzoni, W. J. Willis, R. C. E. Devenish, H. W. Van Hecke, S. Mayburov, A. Holscher, Boris Dolgoshein, H. W. Bartels, W. Cleland, F. Gibrat-Debu, W. Sondheim, R. Heifetz, Odette Benary, Peter Fischer, L. Olsen, L. A. Hamel, H. En'yo, J. Sunier, A. Marzarichiesa, M. J. Esten, L. Lessard, A. Sumarokov, Sven Gösta Nilsson, Francois Corriveau, J. R. Dodd, E. Mazzucato, A. Lounis, J. M. Beaulieu, M. J. Price, R. Veenhof, A. Shmeleva, A. Gaidot, S. Di Liberto, Sverker Johansson, K. Dederichs, Ulf Mjörnmark, H. J. Specht, B. Collick, I. Blevis, G. Rosa, B. Lörstad, G. Romano, H. Beker, S. Almehed, M. Clemen, L. Riccati, J. A. Thompson, D. Bettoni, D. Lissauer, N. DiGiacomo, Vincent Hedberg, and B. V. Jacak

Subjects
Mass number, Nuclear reaction, Physics, Nuclear and High Energy Physics, HELIOS, Projectile, Nuclear Theory, Monte Carlo method, Particle Physics, heavy Ion Physics, Parton, Heavy ions, transverse energy, Spectral line, Nuclear physics, medicine.anatomical_structure, medicine, Atomic physics, Nuclear Experiment, Nucleon, Nucleus, Particle Physics - Experiment
Abstract

Transverse-energy distributions have been measured for the collisions of the 32 S nucleus with Al, Ag, W, Pt, Pb, and U target nuclei, at an incident energy of 200 GeV per nucleon. The shapes of these distribution reflect the geometry of the collisions, including the deformation effects. For central collisions, the transverse-energy production in the region −0.1 η lab A 0.5 , where A is the atomic mass number of the target. This increase is accompanied by a relative depletion in the forward region η lab > 2.9. These results are compared with those obtained under similar conditions with incident 16 O nuclei. A comparison is also made with the predictions of a Monte Carlo generator based on the dual parton model. Finally, we give estimates of the energy density reached and its dependence on the atomic mass number of the projectile.

Published
1988

22. Study of vector mesons in dimuon production in a large kinematic region in p-W and S-W interactions at 200 GeV/c/nucleon

Author

Paolo Giubellino, S. Simone, L. Ramello, J. P. Martin, S. Dagan, S. Di Liberto, P. Taras, Serge Smirnov, Massimo Masera, F. Martelli, M. Gallio, Jozef Urban, M. G. Catanesi, C.W. Fabjan, G. Briskin, M. T. Muciaccia, M. Sarris, Ivan Kralik, M. Beaulieu, J. Antos, Franco Meddi, J. P. Pansart, Y. Oren, Ermanno Vercellin, M. A. Mazzoni, A. L. S. Angelis, A. Gaidot, L. Šándor, B. A. Dolgoshein, S. Muraviev, J. Bystricky, Piergiorgio Cerello, L. A. Hamel, A. Nomerotsky, G. London, Alevtina Shmeleva, M. J. Esten, Ulrich Goerlach, S.P. Konovalov, C. Guerra, G. Rosa, H. Beker, L. Riccati, G. Dellacasa, Gilbert Poulard, Enrico Scomparin, and M. Diehl

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, Branching fraction, Nuclear Theory, Charged particle, Nuclear physics, Transverse mass, Rapidity, High Energy Physics::Experiment, Vector meson, Multiplicity (chemistry), Nucleon, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

Results are presented on $\rho+\omega$, $\phi$ and $J/\Psi$ production in p--W and $^{32}$S--W interactions at 200~GeV/c/nucleon measured via the dimuon decay in a large kinematic region. The data are normalized to the charged particle multiplicity in the same rapidity interval. They have been %CORR 1 obtained collected using the HELIOS/3 muon spectrometer at the CERN SPS. %CORR 2 and The ratio $\phi/{(\rho+\omega)}$ increases between proton and sulphur projectiles, and is further enhanced going from peripheral to central nucleus-nucleus interactions. This results from an increase in the number of produced $\phi$'s per charged particle. The increase in the ratio $\phi/{(\rho+\omega)}$ is not clearly dependent on p$_T$, but appears larger at higher rapidities, due to kinematic effects %CORR 3 and in conjunction with varying acceptance. $J/\Psi$ production, likewise normalized to charged multiplicity, is significantly lower in S--W compared to p--W interactions.

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