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11 results on '"Karpio, K"'

1. Central Pb+Pb collisions at 158 A GeV/c studied by π−π− interferometry

Author

Aggarwal, M.M., Agnihotri, A., Ahammed, Z., Angelis, A.L.S., Antonenko, V., Arefev, V., Astakhov, V., Avdeitchikov, V., Awes, T.C., Baba, P.V.K.S., Badyal, S.K., Barlag, C., Bathe, S., Batiounia, B., Bernier, T., Bhalla, K.B., Bhatia, V.S., Blume, C., Bock, R., Bohne, E.M., Borocz, Z., Bucher, D., Buijs, A., Busching, H., Carlen, L., Chalyshev, V., Chattopadhyay, S., Cherbatchev, R., Chujo, T., Claussen, A., Das, A.C., Decowski, M.P., Delagrange, H., Djordjadze, V., Donni, P., Doubovik, I., Dutt, S., Dutta Majumdar, M.R., El Chenawi, K., Eliseev, S., Enosawa, K., Foka, P., Fokin, S., Ganti, M.S., Garpman, S., Gavrishchuk, O., Geurts, F.J.M., Ghosh, T.K., Glasow, R., Gupta, S.K., Guskov, B., Gustafsson, H.A., Gutbrod, H.H., Higuchi, R., Hrivnacova, I., Ippolitov, M., Kalechofsky, H., Kamermans, R., Kampert, K.H., Karadjev, K., Karpio, K., Kato, S., Kees, S., Klein-Boesing, Christian, Knoche, S., Kolb, B.W., Kosarev, I., Koutcheryaev, I., Krumpel, T., Kugler, A., Kulinich, P., Kurata, M., Kurita, K., Kuzmin, N., Langbein, I., Lebedev, A., Lee, Y.Y., Lohner, H., Luquin, L., Mahapatra, D.P., Manko, V., Martin, M., Martinez, G., Maximov, A., Mgebrichvili, G., Miake, Y., Mir, M.F., Mishra, G.C., Miyamoto, Y., Mohanty, B., Morrison, Douglas R.O., Mukhopadhyay, D.S., Naef, H., Nandi, B.K., Nayak, S.K., Nayak, T.K., Neumaier, S., Nianine, A., Nikitine, V., Nikolaev, S., Nilsson, P., Nishimura, S., Nomokonov, P., Nystrand, J., Obenshain, F.E., Oskarsson, A., Otterlund, I., Pachr, M., Pavliouk, S., Peitzmann, T., Petracek, V., Pinganaud, W., Plasil, F., von Poblotzki, U., Purschke, M.L., Rak, J., Raniwala, R., Raniwala, S., Ramamurthy, V.S., Rao, N.K., Retiere, F., Reygers, K., Roland, G., Rosselet, L., Roufanov, I., Roy, C., Rubio, J.M., Sako, H., Sambyal, S.S., Santo, R., Sato, S., Schlagheck, H., Schmidt, H.R., Schutz, Y., Shabratova, G., Shah, T.H., Sibiriak, I., Siemiarczuk, T., Silvermyr, D., Sinha, B.C., Slavine, N., Soderstrom, K., Solomey, N., Sorensen, S.P., Stankus, P., Stefanek, G., Steinberg, P., Stenlund, E., Stuken, D., Sumbera, M., Svensson, T., Trivedi, M.D., Tsvetkov, A., Tykarski, L., Urbahn, J., van de Pijll, E.C., van Eijndhoven, N., van Nieuwenhuizen, G.J., Vinogradov, A., Viyogi, Y.P., Vodopianov, A.S., Voros, S., Wyslouch, B., Yagi, K., Yokota, Y., and Research unit Nuclear & Hadron Physics

Subjects
Particle physics, Physics and Astronomy (miscellaneous), Gaussian, FOS: Physical sciences, HEAVY-ION COLLISIONS, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), symbols.namesake, TRACKING, Pion, SYSTEMS, Invariant (mathematics), Engineering (miscellaneous), MULTISTEP AVALANCHE CHAMBERS, PION INTERFEROMETRY, Physics, Resolution (electron density), Function (mathematics), 2-PION CORRELATIONS, PERFORMANCE, READOUT, Exponential function, Interferometry, Cross term, symbols, PB+PB COLLISIONS, Particle Physics - Experiment
Abstract

Two-particle correlations have been measured for identified negative pions from central 158 AGeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the radii as a function of kT is presented, including a full correction for the resolution effects of the apparatus. The cross term Rout-long of the standard fit in the Longitudinally CoMoving System (LCMS) and the vl parameter of the generalised Yano-Koonin fit are compatible with 0, suggesting that the source undergoes a boost invariant expansion. The shapes of the correlation functions in Qinv and Qspace have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence, fitting Gaussians to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for the measurement., 13 pages including 10 figures

Published
2000

2. Photon and eta production in p plus Pb and p plus C collisions at root(NN)-N-S=17.4 GeV

Author

Aggarwal, M. M., Ahammed, Z., Angelis, A. L. S., Antonenko, V., Arefiev, V., Astakhov, V., Avdeitchikov, V., Awes, T. C., Baba, P. V. K. S., Badyal, S. K., Bathe, S., Batiounia, B., Baumann, C., Bernier, T., Bhalla, K. B., Bhatia, V. S., Blume, C., Bucher, D., Buesching, H., Carlen, L., Chattopadhyay, S., Decowski, M. P., Delagrange, H., Donni, P., Majumdar, M. R. Dutta, El Chenawi, K., Dubey, A. K., Enosawa, K., Fokin, S., Frolov, V., Ganti, M. S., Garpman, S., Gavrishchuk, O., Geurts, F. J. M., Ghosh, T. K., Glasow, R., Guskov, B., Gustafsson, H.A., Gutbrod, H. H., Hrivnacova, I., Ippolitov, M., Kalechofsky, H., Kamermans, R., Karadjev, K., Karpio, K., Kolb, B. W., Kosarev, I., Koutcheryaev, I., Kugler, A., Kulinich, P., Kurata, M., Lebedev, A., Loehner, H., Luquin, L., Mahapatra, D. P., Mankod, V., Martin, M., Martinez, G., Maximov, A., Miake, Y., Mishra, G. C., Mohanty, B., Mora, M. -J., Morrison, D., Mukhanova, T., Mukhopadhyay, D. S., Naef, H., Nandi, B. K., Nayak, S. K., Nayak, T. K., Nianine, A., Nikitine, V., Nikolaev, S., Nilsson, P., Nishimura, S., Nomokonov, P., Nystrand, J., Oskarsson, A., Otterlund, I., Pavliouk, S., Peitzmann, T., Peressounko, D., Petracek, V., Phatak, S. C., Pinganaud, W., Plasil, F., Purschke, M. L., Rak, J., Rammler, M., Raniwala, R., Raniwala, S., Rao, N. K., Retiere, F., Reygers, K., Roland, G., Rosselet, L., Roufanov, I., Roy, C., Rubio, J. M., Sambyal, S. S., Santo, R., Sato, S., Schlagheck, H., Schmidt, H. -R., Schutz, Y., Shabratova, G., Shah, T. H., Sibiriak, I., Siemiarczuk, T., Silvermyr, D., Sinha, B. C., Slavine, N., Soderstrom, K., Sood, G., Sorensen, S. P., Stankus, P., Stefanek, G., Steinberg, P., Stenlund, E., Sumbera, M., Svensson, T., Tsvetkov, A., Tykarski, L., v. d. Pijll, E. C., v. Eijndhoven, N., v. Nieuwenhuizen, G. J., Vinogradov, A., Viyogi, Y. P., Vodopianov, A., Voeroes, S., Wyslouch, B., Young, G. R., and KVI - Center for Advanced Radiation Technology

Subjects
NUCLEAR REACTIONS C, Pb(p, gamma), E at 160 GeV/c, deduced invariant photon yield vs transverse momentum, invariant eta-meson yield. Compared to Pb plus Pb results at similar, High Energy Physics::Experiment, HEAVY-ION COLLISIONS, Nuclear Experiment, measured relativistic reaction products, energy, QUARK-GLUON PLASMA, 200-GEV/C, MOMENTUM
Abstract

Measurements of direct photon production in p + Pb and p + C collisions at root(NN)-N-s = 17.4 GeV are presented. Upper limits on the direct photon yield as a function of p(T) are derived and compared to the results for Pb + Pb collisions at root(NN)-N-s = 17.3 GeV. The production of the eta meson, which is an important input to the direct photon signal extraction, has been determined in the eta -> 2 gamma channel for p + C collisions at root(NN)-N-s = 17.4 GeV. (c) 2012 Elsevier B.V. All rights reserved.

Published
2013

3. Azimuthal anisotropy of photon and charged particle emission in Pb-208+Pb-208 collisions at 158 center dot A GeV/c

Author

Aggarwal, M M, Ahammed, Z, Angelis, A L S, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, Awes, TC, Baba, P V K S, Badyal, S K, Bathe, S, Batiounia, B, Bernier, T, Bhatia, V S, Blume, C, Bucher, D, Busching, H, Carlen, L, Chattopadhyay, S, Decowski, MP, Delagrange, H, Donni, P, Majumdar, MRD, Dubey, AK, El Chenawi, K, Enosawa, K, Fokin, S, Frolov, V, Ganti, MS, Garpman, S, Gavrishchuk, O, Geurts, FJM, Ghosh, TK, Glasow, R, Gupta, R, Guskov, B, Gustafsson, H.A., Gutbrod, HH, Hrivnacova, I., Ippolitov, M, Kalechofsky, H, Kamermans, R, Karadjev, K, Karpio, K, Kolb, BW, Kosarev, I., Koutcheryaev, I., Kugler, A, Kulinich, P, Löhner, H, KVI - Center for Advanced Radiation Technology, and Research unit Nuclear & Hadron Physics

Subjects
ELLIPTIC FLOW, RELATIVISTIC NUCLEAR COLLISIONS, COLLECTIVE FLOW, TRANSVERSE ENERGY, OF-PLANE EMISSION, HEAVY-ION COLLISIONS, Nuclear Experiment, CENTRALITY DEPENDENCE, MULTIPLICITY DETECTOR, PB+PB COLLISIONS, AU+AU COLLISIONS
Abstract

The azimuthal distributions of photons and charged particles with respect to the event plane are investigated as a function of centrality in Pb-208 + Pb-208 collisions at 158 (.) A GeV/c in the WA98 experiment at the CERN SPS. The anisotropy of the azimuthal distributions is characterized using a Fourier analysis. For both the photon and charged particle distributions the first two Fourier coefficients are observed to decrease with increasing centrality. The observed anisotropies of the photon distributions compare well with the expectations from the charged particle measurements for all centralities.

Published
2005

4. Interferometry of direct photons in central 208Pb+208Pb collisions at 158A GeV

Author

Aggarwal, M M, Ahammed, Z, Angelis, A L S, Antonenko, V., Arefiev, V., Astakhov, V., Avdeitchikov, V., Awes, T C, Baba, P V K S, Badyal, S K, Bathe, S, Batiounia, B, Bernier, T, Bhalla, K B, Bhatia, VS, Blume, C, Bucher, D, Busching, H, Carlen, L, Chattopadhyay, S, Decowski, MP, Delagrange, H, Donni, P, Majumdar, MRD, El Chenawi, K, Dubey, AK, Enosawa, K, Fokin, S, Frolov, V, Ganti, MS, Garpman, S, Gavrishchuk, O, Geurts, FJM, Ghosh, T K, Glasow, R, Guskov, B, Gustafsson, H.A., Gutbrod, HH, Hrivnacova, I., Ippolitov, M, Kalechofsky, H, Karadjev, K, Karpio, K, Kolb, BW, Kosarev, I., Koutcheryaev, I., Kugler, A, Kulinich, P, Kurata, M, Löhner, Herbert, KVI - Center for Advanced Radiation Technology, and Research unit Nuclear & Hadron Physics

Subjects
QUARK-GLUON DYNAMICS, PLASMA, HEAVY-ION COLLISIONS, Nuclear Experiment, PB+PB COLLISIONS
Abstract

Two-particle correlations of direct photons were measured in central (208Pb+208Pb collisions at 158A GeV. The invariant interferometric radii were extracted for 100

Published
2004

5. One-, two-, and three-particle distributions from 158A GeV/c central Pb+Pb collisions

Author

Aggarwal, M M, Angelis, A L S, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, Awes, TC, Baba, P V K S, Badyal, K, Bathe, S, Batiounia, B, Bernier, T, Bhalla, KB, Bhatia, VS, Blume, C, Bucher, D, Busching, H, Carlen, L, Chattopadhyay, S, Decowski, MP, Delagrange, H, Donni, P, Majumdar, MRD, El Chenawi, K, Enosawa, K, Fokin, S, Frolov, V, Ganti, MS, Garpman, S, Gavrishchuk, O, Geurts, FJM, Ghosh, T K, Glasow, R, Guskov, B, Gustafsson, H.A., Gutbrod, HH, Hrivnacova, I., Ippolitov, M, Kalechofsky, H, Kamermans, R, Karadjev, K, Karpio, K, Kolb, BW, Kosarev, I., Koutcheryaev, I., Kugler, A, Kulinich, P, Kurata, M, Lebedev, A, Lohner, H, Mahapatra, DP, Manko, V., Martin, M, Martinez, G, Maximov, A, Miake, Y, Mishra, GC, Mohanty, B, Mora, MJ, Morrison, D, Mukhanova, T, Mukhopadhyay, DS, Naef, H, Nandi, BK, Nayak, SK, Nayak, TK, Nianine, A, Nikitine, V, Nikolaev, S, Nilsson, P, Nishimura, S, Nomokonov, P, Nystrand, J, Oskarsson, A, Otterlund, I., Peitzmann, T, Peressounko, D, Petracek, V., Plasil, F, Purschke, ML, Rak, J, Raniwala, R, Raniwala, S, Rao, NK, Reygers, K, Roland, G, Rosselet, L, Roufanov, I, Rubio, JM, Sambyal, SS, Santo, R, Sato, S, Schlagheck, H, Schutz, Y, Shabratova, G, Shah, TH, Sibiriak, I., Siemiarczuk, T, Silvermyr, D, Sinha, BC, Slavine, N, Soderstrom, K, Sood, G, Sorensen, SP, Stankus, P, Stefanek, G, Steinberg, P, Stenlund, E, Sumbera, M, Svensson, T, Tsvetkov, A., Tykarski, L, v d Pijll, EC, v Eijndhoven, N, v Nieuwenhuizen, GJ, Vinogradov, A, Viyogi, YP, Vodopianov, A, Voros, S, Wyslouch, B, Young, GR, and Research unit Nuclear & Hadron Physics

Subjects
TWISS CORRELATION RADII, Nuclear Theory, 3-PION INTERFEROMETRY, MULTISTEP AVALANCHE CHAMBER, PHASE-SPACE DENSITY, NUCLEAR COLLISIONS, HEAVY-ION COLLISIONS, 2-PION CORRELATIONS, PERFORMANCE, Nuclear Experiment, PLUS PB COLLISIONS, PION INTERFEROMETRY
Abstract

Several hadronic observables have been studied in central 158A GeV Pb+Pb collisions using data measured by the WA98 experiment at CERN: single pi(-) and K- production, as well as two- and three-pion interferometry. The Wiedemann-Heinz hydrodynamical model has been fitted to the pion spectrum, giving an estimate of the temperature and transverse flow velocity. Bose-Einstein correlations between two identified pi(-) have been analyzed as a function of k(T), using two different parametrizations. The results indicate that the source does not have a strictly boost invariant expansion or spend time in a long-lived intermediate phase. A comparison between data and a hydrodynamical based simulation shows very good agreement for the radii parameters as a function of k(T). The pion phase-space density at freeze-out has been measured, and agrees well with the Tomasik-Heinz model. A large pion chemical potential close to the condensation limit of m(pi) seems to be excluded. The three-pion Bose-Einstein interferometry shows a substantial contribution of the genuine three-pion correlation, but not quite as large as expected for a fully chaotic and symmetric source.

Published
2003

6. Event-by-event fluctuations in particle multiplicities and transverse energy produced in 158A GeVPb plus Pb collisions

Author

Aggarwal, M M, Ahammed, Z, Angelis, A L S, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, Awes, T C, Baba, P V K S, Badyal, S K, Bathe, S, Batiounia, B, Bernier, T, Bhalla, K B, Bhatia, VS, Blume, C, Bucher, D, Busching, H, Carlen, L, Chattopadhyay, S, Decowski, MP, Delagrange, H, Donni, P, Majumdar, MRD, El Chenawi, K, Dubey, AK, Enosawa, K, Fokin, S, Frolov, V, Ganti, MS, Garpman, S, Gavrishchuk, O, Geurts, FJM, Ghosh, T K, Glasow, R, Guskov, B, Gustafsson, H.A., Gutbrod, HH, Hrivnacova, I, Ippolitov, M, Kalechofsky, H, Karadjev, K, Karpio, K, Kolb, BW, Kosarev, I, Koutcheryaev, I, Kugler, A, Kulinich, P, Kurata, M, Lohner, H, Mohanty, B, KVI - Center for Advanced Radiation Technology, and Research unit Nuclear & Hadron Physics

Subjects
PHYSICS, NUCLEUS NUCLEUS COLLISIONS, PHASE-TRANSITION, DISTRIBUTIONS, HEAVY-ION COLLISIONS, O-16-NUCLEUS COLLISIONS, PB+PB COLLISIONS, DETECTOR, QCD, QUARK-GLUON PLASMA
Abstract

Event-by-event fluctuations in the multiplicities of charged particles and photons, and the total transverse energy in 158A GeV Pb+Pb collisions are studied for a wide range of centralities. For narrow centrality bins the multiplicity and transverse energy distributions are found to be near perfect Gaussians. The effect of detector acceptance on the multiplicity fluctuations has been studied and demonstrated to follow statistical considerations. The centrality dependence of the charged particle multiplicity fluctuations in the measured data has been found to agree reasonably well with those obtained from a participant model. However, for photons the multiplicity fluctuations have been found to be lower compared to those obtained from a participant model. The multiplicity and transverse energy fluctuations have also been compared to those obtained from the VENUS event generator.

Published
2002

7. Particle density fluctuations

Author

Aggarwal, M.M., Ahammed, Z., Angelis, A.L.S., Antonenko, V., Arefiev, V., Astakhov, V., Avdeitchikov, V., Awes, T.C., Baba, P.V.K.S., Badyal, S.K., Bathe, S., Batiounia, B., Bernier, T., Bhalla, K.B., Bhatia, V.S., Blume, C., Bucher, D., Büsching, H., Carlen, L., Chattopadhyay, S., Das, A.C., Decowski, M.P., Donni, P., Dubey, A.K., Dutta Majumdar, M.R., Enosawa, K., Fokin, S., Frolov, V., Ganti, M.S., Garpman, S., Gavrishcuk, O., Geurts, F.J.M., Glasow, R., Guskov, B., Gustafsson, H.A., Gutbrod, H.H., Hrivnacova, I., Ippolitov, M., Kalechofsky, H., Kamermans, R., Karadjev, K., Karpio, K., Kolb, B.W., Kosarev, I., Koutcheryaev, I., Kugler, A., Kulinich, P., Kurata, M., Lebedev, A., Löhner, H., Mahapatra, D.P., Manko, V., Martin, M., Miake, Y., Mishra, G.C., Mohanty, B., Morrison, D., Mukhopadhayay, D.S., Naef, H., Nandi, B.K., Nayak, S.K., Nayak, T.K., Nianine, A., Nikitine, V., Nikolaev, S., Nishimura, S., Nomokov, P., Petracek, V., Plasil, F., Purschke, M.L., Rak, J., Raniwala, R., Raniwala, S., Rao, N.K., Retiere, F., Reygers, K., Roland, G., Rosselet, L., Roufanov, I., Rubio, J.M., Sambyal, S.S., Santo, R., Sato, S., Schlagheck, H., Schmidt, H.-R., Schutz, Y., Shabratova, G., Sibiriak, I., Siemiarczuk, T., Sinha, B.C., Slavine, N., Söderström, K., Sood, G., Sørensen, S.P., Stankus, P., Steinberg, P., Stenlund, E., Sumbera, M., Svensson, T., Trivedi, M.D., Tsvetkov, A., Tykarski, L., Urbahn, J., Eijinhoven, N.v., Niewenhuizen, G.J.v., Vinogradov, A., Viyogi, Y.P., Vodopianov, A., Vörös, S., Wyslouch, B., Young, G.R., and KVI - Center for Advanced Radiation Technology

Subjects
Physics, Nuclear and High Energy Physics, Photon, FOS: Physical sciences, Multiplicity (mathematics), HEAVY-ION COLLISIONS, QCD, Charged particle, Nuclear physics, Rapidity, Nuclear Experiment (nucl-ex), Particle density, Nuclear Experiment, POINT, Nuclear Physics
Abstract

Event-by-event fluctuations in the multiplicities of charged particles and photons at SPS energies are discussed. Fluctuations are studied by controlling the centrality of the reaction and rapidity acceptance of the detectors. Results are also presented on the event-by-event study of correlations between the multiplicity of charged particles and photons to search for DCC-like signals., Comment: Talk presented at Quark Matter 2002, Nantes, France

Published
2002
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8. Three-pion interferometry results from central Pb plus Pb collisions at 158A GeV/c

Author

Aggarwal, M.M., Agnihotri, A., Ahammed, Z.A., Angelis, A.L.S., Antonenko, V., Arefiev, V., Astakhov, V., Avdeitchikov, V., Awes, T.C., Baba, P.V.K.S., Badyal, S.K., Barlag, C., Bathe, S., Batiounia, B., Bernier, T., Bhalla, K.B., Bhatia, V.S., Blume, C., Bock, D., Bohne, E.-M., Böröcz, Z.K., Bucher, D., Buijs, A., Büsching, H., Carlén, L., Chalyshev, V., Chattopadhyay, S., Cherbatchev, R., Chujo, T., Claussen, A., Das, A.C., Decowski, M.P., Delagrange, H., Djordjadze, V., Donni, P., Doubovik, I., Dutt, S., Dutta Majumdar, M.R., El Chenawi, K., Eliseev, S., Enosawa, K., Foka, P., Fokin, S., Ganti, M.S., Garpmann, S., Gavrishchuk, O., Geurts, F., Ghosh, Tarun, Glasow, R., Gupta, S.K., Guskov, B., Gustafsson, H.-A., Gutbrod, H.H., Higuchi, R., Hrivnacova, I., Ippolitov, M., Kalechofsky, H., Kamermans, R., Kampert, K.-H., Karadjev, K., Karpio, K., Kato, S., Kees, S., Klein-Bösing, C., Knoche, S., Kolb, B., Kosarev, I., Koutcheryaev, I., Krümpel, T., Kugler, A., Kulinich, P., Kurata, M., Kurita, K., Kuzmin, N., Langbein, I., Lebedev, A., Lee, Y.Y., Löhner, H., Luquin, L., Mahapatra, D.P., Manko, V., Martin, M., Martinez, G., Maximov, A., Mgebrichvili, G., Miake, Y., Mir, Md.F., Miyamoto, Y., Mohanti, B., Mora, M.-J., Morrison, D., Mukhopadhyay, D.S., Naef, H., Nandi, B.K., Nayak, S.K., Nayak, T.K., Neumaier, S., Nianine, A., Nikitine, V., and KVI - Center for Advanced Radiation Technology

Subjects
MODEL, TRACKING, MULTISTEP AVALANCHE CHAMBER, HEAVY-ION COLLISIONS, PERFORMANCE, PB+PB COLLISIONS, 3-PION CORRELATIONS
Abstract

Three-particle correlations have been measured for identified pi(-) from central 158A GeV Pb + Pb collisions by the WA98 experiment at CERN. A substantial contribution of the genuine three-body correlation has been found as expected for a mainly chaotic and symmetric source.

Published
2000

9. Three-pion interferometry results from central Pb plus Pb collisions at 158A GeV/c

Author

Aggarwal, M M, Agnihotri, A, Ahammed, Z, Angelis, A L S, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, Awes, T C, Baba, P V K S, Badyal, S K, Barlag, C, Bathe, S, Batiounia, B, Bernier, T, Bhalla, K B, Bhatia, VS, Blume, C, Bock, R, Bohne, E M, Borocz, Z, Bucher, D, Buijs, A, Busching, H, Carlen, L, Chalyshev, V, Chattopadhyay, S, Cherbatchev, R, Chujo, T, Claussen, A, Das, A C, Decowski, M P, Delagrange, H, Djordjadze, V, Donni, P, Doubovik, I, Dutt, S, Majumdar, M R D, El Chenawi, K, Eliseev, S, Enosawa, K, Foka, P, Fokin, S, Ganti, M S, Garpman, S, Gavrishchuk, O, Geurts, F J M, Ghosh, T K, Glasow, R, Gupta, S K, Guskov, B, Gustafsson, H.A., Gutbrod, H H, Higuchi, R, Hrivnacova, I, Ippolitov, M, Kalechofsky, H, Kamermans, R, Kampert, K H, Karadjev, K, Karpio, K, Kato, S, Kees, S, Klein-Bosing, C, Knoche, S, Kolb, B W, Kosarev, I, Koutcheryaev, I, Krumpel, T, Kugler, A, Kulinich, P, Kurata, M, Kurita, K, Kuzmin, N, Langbein, I, Lebedev, A, Lee, Y Y, Lohner, H, Luquin, L, Mahapatra, D P, Manko, V, Martin, M, Martinez, G, Maximov, A, Mgebrichvili, G, Miake, Y, Mir, M F, Mishra, G C, Miyamoto, Y, Mohanty, B, Mora, M J, Morrison, D, Mukhopadhyay, D S, Naef, H, Nandi, B K, Nayak, S K, Nayak, T K, Neumaier, S, Nianine, A, Nikitine, V, Nikolaev, S, Nilsson, P, Nishimura, S, Nomokonov, P, Nystrand, J, Obenshain, F E, Oskarsson, A, Otterlund, I, Pachr, M, Pavliouk, S, Peitzmann, T, Petracek, V, Pinganaud, W, Plasil, F, von Poblotzki, U, Purschke, M L, Rak, J, Raniwala, R, Raniwala, S, Ramamurthy, V S, Rao, N K, Retiere, F, Reygers, K, Roland, G, Rosselet, L, Roufanov, I, Roy, C, Rubio, J M, Sako, H, Sambyal, SS, Santo, R, Sato, S, Schlagheck, H, Schutz, Y, Shabratova, G, Shah, T H, Sibiriak, I, Siemiarczuk, T, Silvermyr, D, Sinha, BC, Slavine, N, Soderstrom, K, Solomey, N, Sorensen, S P, Stankus, P, Stefanek, G, Steinberg, P, Stenlund, E, Stuken, D, Sumbera, M, Svensson, T, Trivedi, M D, Tsvetkov, A., Tykarski, L, Urbahn, J, van der Pijll, E C, van Eijndhoven, N, van Nieuwenhuizen, G J, Vinogradov, A, Viyogi, Y P, Vodopianov, A, Voros, S, Wyslouch, B, Yagi, K, Yokota, Y, Young, GR, KVI - Center for Advanced Radiation Technology, and Research unit Nuclear & Hadron Physics

Subjects
MODEL, TRACKING, MULTISTEP AVALANCHE CHAMBER, HEAVY-ION COLLISIONS, PERFORMANCE, Nuclear Experiment, PB+PB COLLISIONS, 3-PION CORRELATIONS
Abstract

Three-particle correlations have been measured for identified pi(-) from central 158A GeV Pb + Pb collisions by the WA98 experiment at CERN. A substantial contribution of the genuine three-body correlation has been found as expected for a mainly chaotic and symmetric source.

Published
2000

10. Scaling of Particle and Transverse Energy Production in 208Pb+208Pb collisions at 158 A GeV

Author

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

Subjects
Physics and Astronomy (miscellaneous), Nuclear Theory, FOS: Physical sciences, HEAVY-ION COLLISIONS, Nuclear physics, TARGETS, DISTRIBUTIONS, Nuclear Physics - Experiment, Physics::Chemical Physics, Nuclear Experiment (nucl-ex), Nuclear Experiment, Engineering (miscellaneous), Scaling, Physics, Range (particle radiation), PLASMA, NUCLEUS-NUCLEUS COLLISIONS, HADRONS, MULTIPLICITY, Charged particle, MOMENTUM, MODEL, Pseudorapidity, ULTRARELATIVISTIC ENERGIES, Production (computer science), High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Impact parameter, Nucleon, Energy (signal processing)
Abstract

Transverse energy, charged particle pseudorapidity distributions and photon transverse momentum spectra have been studied as a function of the number of participants (N_{part}) and the number of binary nucleon-nucleon collisions (N_{coll}) in 158 A GeV Pb+Pb collisions over a wide impact parameter range. A scaling of the transverse energy pseudorapidity density at midrapidity as N_{part}^{1.08 \pm 0.06} and N_{coll}^{0.83 \pm 0.05} is observed. For the charged particle pseudorapidity density at midrapidity we find a scaling as N_{part}^{1.07 \pm 0.04} and N_{coll}^{0.82 \pm 0.03}. This faster than linear scaling with N_{part} indicates a violation of the naive Wounded Nucleon Model., 13 pages, 16 figures, submitted to European Physical Journal C (revised results for scaling exponents)

Published
2000

11. Freeze-out parameters in central 158A (GeVPb)-Pb-208+Pbcollisions

Author

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

Subjects
Nuclear Theory, NUCLEAR COLLISIONS, EXPANSION, HEAVY-ION COLLISIONS, Nuclear Experiment
Abstract

Neutral pion production in central 158A GeV Pb-208 + Pb-208 collisions has been studied in the WA98 experiment at the CERN Super Proton Synchrotron. The pi(0) transverse mass spectrum has been analyzed in terms of a thermal model with hydrodynamic expansion. The high accuracy and large kinematic coverage of the measurement allow one to limit previously noted ambiguities in the extracted freeze-out parameters. The results are shown to be sensitive to the shape of the velocity distribution at freeze-out.

Published
1999

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