Systematics of inclusive photon production in 158·a GeV Pb induced reactions on Ni, Nb, and Pb targets

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 & 148 others 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, 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. 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, M. F. Mir, 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. Peitzmann, V. Petracek, F. Plasil, W. Pinanaud, 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, T. H. Shah, I. Sibiriak, T. Siemiarczuk, D. Silvermyr, B. C. Sinha, N. Slavine, K. Söderström, N. Solomey, S. P. Sorensen, 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. Wysluch, K. Yagi, Y. Yokota, G. R. Young

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The multiplicity of inclusive photons has been measured on an event-by-event basis for 158 · A GeV Pb induced reactions on Ni, Nb, and Pb targets. The systematics of the pseudorapidity densities at midrapidity (ρmax) and the width of the pseudorapidity distributions have been studied for varying centralities for these collisions. A power law fit to the photon yield as a function of the number of participating nucleons gives a value of 1.12 + 0.03 for the exponent. The mean transverse momentum, 〈PT〉, of photons determined from the ratio of the measured electromagnetic transverse energy and photon multiplicity, remains almost constant with increasing ρmax. Results are compared with model predictions.

Original languageEnglish (US)
Pages (from-to)422-430
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume458
Issue number2-3
StatePublished - 1999

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photons
transverse momentum
nucleons
exponents
electromagnetism
collisions
predictions
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Aggarwal, M. M., Agnihotri, A., Ahammed, Z., Angelis, A. L. S., Antonenko, V., Arefiev, V., ... Young, G. R. (1999). Systematics of inclusive photon production in 158·a GeV Pb induced reactions on Ni, Nb, and Pb targets. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 458(2-3), 422-430.

Systematics of inclusive photon production in 158·a GeV Pb induced reactions on Ni, Nb, and Pb targets. / 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.; Böröcz, Z.; Bucher, D.; Buijs, A.; Büsching, H.; Carlen, L.; Chalyshev, V.; Chattopadhyay, S.; Cherbatchev, R.; Chujo, T.; Claussen, A.; Das, A. C.; Decowski, M. P.; 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.; 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.; 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.; Pinanaud, 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.; Shabratova, G.; Shah, T. H.; Sibiriak, I.; Siemiarczuk, T.; Silvermyr, D.; Sinha, B. C.; Slavine, N.; Söderström, K.; Solomey, N.; Sorensen, S. P.; Stankus, P.; Stefanek, G.; Steinberg, P.; Stenlund, E.; Stüken, D.; Sumbera, M.; Svensson, T.; Trivedi, M. D.; Tsvetkov, A.; Twenhöfel, C.; Tykarski, L.; Urbahn, J.; Eijndhoven, N. V.; Nieuwenhuizen, G. J V; Vinogradov, A.; Viyogi, Y. P.; Vodopianov, A.; Vörös, S.; Wysluch, B.; Yagi, K.; Yokota, Y.; Young, G. R.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 458, No. 2-3, 1999, p. 422-430.

Research output: Contribution to journalArticle

Aggarwal, MM, Agnihotri, A, Ahammed, Z, Angelis, ALS, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, Awes, TC, Baba, PVKS, Badyal, SK, Baldine, A, Barabach, L, Barlag, C, Bathe, S, Batiounia, B, Bernier, T, Bhalla, KB, Bhatia, VS, Blume, C, Bock, R, Bohne, EM, Böröcz, Z, Bucher, D, Buijs, A, Büsching, H, Carlen, L, Chalyshev, V, Chattopadhyay, S, Cherbatchev, R, Chujo, T, Claussen, A, Das, AC, Decowski, MP, Djordjadze, V, Donni, P, Doubovik, I, Dutt, S, Dutta Majumdar, MR, El Chenawi, K, Eliseev, S, Enosawa, K, Foka, P, Fokin, S, Frolov, V, Ganti, MS, Garpman, S, Gavrishchuk, O, Geurts, FJM, Ghosh, TK, Glasow, R, Gupta, SK, Guskov, B, Gustafsson, HA, Gutbrod, HH, Higuchi, R, Hrivnacova, I, Ippolitov, M, Kalechofsky, H, Kamermans, R, Kampert, KH, Karadjev, K, Karpio, K, Kato, S, Kees, S, Kim, H, Kolb, BW, Kosarev, I, Koutcheryaev, I, Krümpel, T, Kugler, A, Kulinich, P, Kurata, M, Kurita, K, Kuzmin, N, Langbein, I, Lebedev, A, Lee, YY, Löhner, H, Luquin, L, Mahapatra, DP, Manko, V, Martin, M, Maximov, A, Mehdiyev, R, Mgebrichvili, G, Miake, Y, Mikhalev, D, Mir, MF, Mishra, GC, Miyamoto, Y, Morrison, D, Mukhopadhyay, DS, Myalkovski, V, Naef, H, Nandi, BK, Nayak, SK, Nayak, TK, Neumaier, S, Nianine, A, Nikitine, V, Nikolaev, S, Nilsson, P, Nishimura, S, Nomokonov, P, Nystrand, J, Obenshain, FE, Oskarsson, A, Otterlund, I, Pachr, M, Parfenov, A, Pavliouk, S, Peitzmann, T, Petracek, V, Plasil, F, Pinanaud, W, Purschke, ML, Raeven, B, Rak, J, Raniwala, R, Raniwala, S, Ramamurthy, VS, Rao, NK, Retiere, F, Reygers, K, Roland, G, Rosselet, L, Roufanov, I, Roy, C, Rubio, JM, Sako, H, Sambyal, SS, Santo, R, Sato, S, Schlagheck, H, Schmidt, HR, Shabratova, G, Shah, TH, Sibiriak, I, Siemiarczuk, T, Silvermyr, D, Sinha, BC, Slavine, N, Söderström, K, Solomey, N, Sorensen, SP, Stankus, P, Stefanek, G, Steinberg, P, Stenlund, E, Stüken, D, Sumbera, M, Svensson, T, Trivedi, MD, Tsvetkov, A, Twenhöfel, C, Tykarski, L, Urbahn, J, Eijndhoven, NV, Nieuwenhuizen, GJV, Vinogradov, A, Viyogi, YP, Vodopianov, A, Vörös, S, Wysluch, B, Yagi, K, Yokota, Y & Young, GR 1999, 'Systematics of inclusive photon production in 158·a GeV Pb induced reactions on Ni, Nb, and Pb targets', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 458, no. 2-3, pp. 422-430.
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. ; Böröcz, Z. ; Bucher, D. ; Buijs, A. ; Büsching, H. ; Carlen, L. ; Chalyshev, V. ; Chattopadhyay, S. ; Cherbatchev, R. ; Chujo, T. ; Claussen, A. ; Das, A. C. ; Decowski, M. P. ; 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. ; 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. ; 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. ; Pinanaud, 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. ; Shabratova, G. ; Shah, T. H. ; Sibiriak, I. ; Siemiarczuk, T. ; Silvermyr, D. ; Sinha, B. C. ; Slavine, N. ; Söderström, K. ; Solomey, N. ; Sorensen, S. P. ; Stankus, P. ; Stefanek, G. ; Steinberg, P. ; Stenlund, E. ; Stüken, D. ; Sumbera, M. ; Svensson, T. ; Trivedi, M. D. ; Tsvetkov, A. ; Twenhöfel, C. ; Tykarski, L. ; Urbahn, J. ; Eijndhoven, N. V. ; Nieuwenhuizen, G. J V ; Vinogradov, A. ; Viyogi, Y. P. ; Vodopianov, A. ; Vörös, S. ; Wysluch, B. ; Yagi, K. ; Yokota, Y. ; Young, G. R. / Systematics of inclusive photon production in 158·a GeV Pb induced reactions on Ni, Nb, and Pb targets. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1999 ; Vol. 458, No. 2-3. pp. 422-430.
@article{0471ec402ed04a138a10efbcdd389299,
title = "Systematics of inclusive photon production in 158·a GeV Pb induced reactions on Ni, Nb, and Pb targets",
abstract = "The multiplicity of inclusive photons has been measured on an event-by-event basis for 158 · A GeV Pb induced reactions on Ni, Nb, and Pb targets. The systematics of the pseudorapidity densities at midrapidity (ρmax) and the width of the pseudorapidity distributions have been studied for varying centralities for these collisions. A power law fit to the photon yield as a function of the number of participating nucleons gives a value of 1.12 + 0.03 for the exponent. The mean transverse momentum, 〈PT〉, of photons determined from the ratio of the measured electromagnetic transverse energy and photon multiplicity, remains almost constant with increasing ρmax. Results are compared with model predictions.",
author = "Aggarwal, {M. M.} and A. Agnihotri and Z. Ahammed and Angelis, {A. L S} and V. Antonenko and V. Arefiev and V. Astakhov and V. Avdeitchikov and Awes, {T. C.} and Baba, {P. V K S} and Badyal, {S. K.} and A. Baldine and L. Barabach and C. Barlag and S. Bathe and B. Batiounia and T. Bernier and Bhalla, {K. B.} and Bhatia, {V. S.} and C. Blume and R. Bock and Bohne, {E. M.} and Z. B{\"o}r{\"o}cz and D. Bucher and A. Buijs and H. B{\"u}sching and L. Carlen and V. Chalyshev and S. Chattopadhyay and R. Cherbatchev and T. Chujo and A. Claussen and Das, {A. C.} and Decowski, {M. P.} and V. Djordjadze and P. Donni and I. Doubovik and S. Dutt and {Dutta Majumdar}, {M. R.} and {El Chenawi}, K. and S. Eliseev and K. Enosawa and P. Foka and S. Fokin and V. Frolov and Ganti, {M. S.} and S. Garpman and O. Gavrishchuk and Geurts, {F. J M} and Ghosh, {T. K.} and R. Glasow and Gupta, {S. K.} and B. Guskov and Gustafsson, {H. A.} and Gutbrod, {H. H.} and R. Higuchi and I. Hrivnacova and M. Ippolitov and H. Kalechofsky and R. Kamermans and Kampert, {K. H.} and K. Karadjev and K. Karpio and S. Kato and S. Kees and H. Kim and Kolb, {B. W.} and I. Kosarev and I. Koutcheryaev and T. Kr{\"u}mpel and A. Kugler and P. Kulinich and M. Kurata and K. Kurita and N. Kuzmin and I. Langbein and A. Lebedev and Lee, {Y. Y.} and H. L{\"o}hner and L. Luquin and Mahapatra, {D. P.} and V. Manko and M. Martin and A. Maximov and R. Mehdiyev and G. Mgebrichvili and Y. Miake and D. Mikhalev and Mir, {M. F.} and Mishra, {G. C.} and Y. Miyamoto and D. Morrison and Mukhopadhyay, {D. S.} and V. Myalkovski and H. Naef and Nandi, {B. K.} and Nayak, {S. K.} and Nayak, {T. K.} and S. Neumaier and A. Nianine and V. Nikitine and S. Nikolaev and P. Nilsson and S. Nishimura and P. Nomokonov and J. Nystrand and Obenshain, {F. E.} and A. Oskarsson and I. Otterlund and M. Pachr and A. Parfenov and S. Pavliouk and T. Peitzmann and V. Petracek and F. Plasil and W. Pinanaud and Purschke, {M. L.} and B. Raeven and J. Rak and R. Raniwala and S. Raniwala and Ramamurthy, {V. S.} and Rao, {N. K.} and F. Retiere and K. Reygers and G. Roland and L. Rosselet and I. Roufanov and C. Roy and Rubio, {J. M.} and H. Sako and Sambyal, {S. S.} and R. Santo and S. Sato and H. Schlagheck and Schmidt, {H. R.} and G. Shabratova and Shah, {T. H.} and I. Sibiriak and T. Siemiarczuk and D. Silvermyr and Sinha, {B. C.} and N. Slavine and K. S{\"o}derstr{\"o}m and N. Solomey and Sorensen, {S. P.} and P. Stankus and G. Stefanek and P. Steinberg and E. Stenlund and D. St{\"u}ken and M. Sumbera and T. Svensson and Trivedi, {M. D.} and A. Tsvetkov and C. Twenh{\"o}fel and L. Tykarski and J. Urbahn and Eijndhoven, {N. V.} and Nieuwenhuizen, {G. J V} and A. Vinogradov and Viyogi, {Y. P.} and A. Vodopianov and S. V{\"o}r{\"o}s and B. Wysluch and K. Yagi and Y. Yokota and Young, {G. R.}",
year = "1999",
language = "English (US)",
volume = "458",
pages = "422--430",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "2-3",

}

TY - JOUR

T1 - Systematics of inclusive photon production in 158·a GeV Pb induced reactions on Ni, Nb, and Pb targets

AU - Aggarwal, M. M.

AU - Agnihotri, A.

AU - Ahammed, Z.

AU - Angelis, A. L S

AU - Antonenko, V.

AU - Arefiev, V.

AU - Astakhov, V.

AU - Avdeitchikov, V.

AU - Awes, T. C.

AU - Baba, P. V K S

AU - Badyal, S. K.

AU - Baldine, A.

AU - Barabach, L.

AU - Barlag, C.

AU - Bathe, S.

AU - Batiounia, B.

AU - Bernier, T.

AU - Bhalla, K. B.

AU - Bhatia, V. S.

AU - Blume, C.

AU - Bock, R.

AU - Bohne, E. M.

AU - Böröcz, Z.

AU - Bucher, D.

AU - Buijs, A.

AU - Büsching, H.

AU - Carlen, L.

AU - Chalyshev, V.

AU - Chattopadhyay, S.

AU - Cherbatchev, R.

AU - Chujo, T.

AU - Claussen, A.

AU - Das, A. C.

AU - Decowski, M. P.

AU - Djordjadze, V.

AU - Donni, P.

AU - Doubovik, I.

AU - Dutt, S.

AU - Dutta Majumdar, M. R.

AU - El Chenawi, K.

AU - Eliseev, S.

AU - Enosawa, K.

AU - Foka, P.

AU - Fokin, S.

AU - Frolov, V.

AU - Ganti, M. S.

AU - Garpman, S.

AU - Gavrishchuk, O.

AU - Geurts, F. J M

AU - Ghosh, T. K.

AU - Glasow, R.

AU - Gupta, S. K.

AU - Guskov, B.

AU - Gustafsson, H. A.

AU - Gutbrod, H. H.

AU - Higuchi, R.

AU - Hrivnacova, I.

AU - Ippolitov, M.

AU - Kalechofsky, H.

AU - Kamermans, R.

AU - Kampert, K. H.

AU - Karadjev, K.

AU - Karpio, K.

AU - Kato, S.

AU - Kees, S.

AU - Kim, H.

AU - Kolb, B. W.

AU - Kosarev, I.

AU - Koutcheryaev, I.

AU - Krümpel, T.

AU - Kugler, A.

AU - Kulinich, P.

AU - Kurata, M.

AU - Kurita, K.

AU - Kuzmin, N.

AU - Langbein, I.

AU - Lebedev, A.

AU - Lee, Y. Y.

AU - Löhner, H.

AU - Luquin, L.

AU - Mahapatra, D. P.

AU - Manko, V.

AU - Martin, M.

AU - Maximov, A.

AU - Mehdiyev, R.

AU - Mgebrichvili, G.

AU - Miake, Y.

AU - Mikhalev, D.

AU - Mir, M. F.

AU - Mishra, G. C.

AU - Miyamoto, Y.

AU - Morrison, D.

AU - Mukhopadhyay, D. S.

AU - Myalkovski, V.

AU - Naef, H.

AU - Nandi, B. K.

AU - Nayak, S. K.

AU - Nayak, T. K.

AU - Neumaier, S.

AU - Nianine, A.

AU - Nikitine, V.

AU - Nikolaev, S.

AU - Nilsson, P.

AU - Nishimura, S.

AU - Nomokonov, P.

AU - Nystrand, J.

AU - Obenshain, F. E.

AU - Oskarsson, A.

AU - Otterlund, I.

AU - Pachr, M.

AU - Parfenov, A.

AU - Pavliouk, S.

AU - Peitzmann, T.

AU - Petracek, V.

AU - Plasil, F.

AU - Pinanaud, W.

AU - Purschke, M. L.

AU - Raeven, B.

AU - Rak, J.

AU - Raniwala, R.

AU - Raniwala, S.

AU - Ramamurthy, V. S.

AU - Rao, N. K.

AU - Retiere, F.

AU - Reygers, K.

AU - Roland, G.

AU - Rosselet, L.

AU - Roufanov, I.

AU - Roy, C.

AU - Rubio, J. M.

AU - Sako, H.

AU - Sambyal, S. S.

AU - Santo, R.

AU - Sato, S.

AU - Schlagheck, H.

AU - Schmidt, H. R.

AU - Shabratova, G.

AU - Shah, T. H.

AU - Sibiriak, I.

AU - Siemiarczuk, T.

AU - Silvermyr, D.

AU - Sinha, B. C.

AU - Slavine, N.

AU - Söderström, K.

AU - Solomey, N.

AU - Sorensen, S. P.

AU - Stankus, P.

AU - Stefanek, G.

AU - Steinberg, P.

AU - Stenlund, E.

AU - Stüken, D.

AU - Sumbera, M.

AU - Svensson, T.

AU - Trivedi, M. D.

AU - Tsvetkov, A.

AU - Twenhöfel, C.

AU - Tykarski, L.

AU - Urbahn, J.

AU - Eijndhoven, N. V.

AU - Nieuwenhuizen, G. J V

AU - Vinogradov, A.

AU - Viyogi, Y. P.

AU - Vodopianov, A.

AU - Vörös, S.

AU - Wysluch, B.

AU - Yagi, K.

AU - Yokota, Y.

AU - Young, G. R.

PY - 1999

Y1 - 1999

N2 - The multiplicity of inclusive photons has been measured on an event-by-event basis for 158 · A GeV Pb induced reactions on Ni, Nb, and Pb targets. The systematics of the pseudorapidity densities at midrapidity (ρmax) and the width of the pseudorapidity distributions have been studied for varying centralities for these collisions. A power law fit to the photon yield as a function of the number of participating nucleons gives a value of 1.12 + 0.03 for the exponent. The mean transverse momentum, 〈PT〉, of photons determined from the ratio of the measured electromagnetic transverse energy and photon multiplicity, remains almost constant with increasing ρmax. Results are compared with model predictions.

AB - The multiplicity of inclusive photons has been measured on an event-by-event basis for 158 · A GeV Pb induced reactions on Ni, Nb, and Pb targets. The systematics of the pseudorapidity densities at midrapidity (ρmax) and the width of the pseudorapidity distributions have been studied for varying centralities for these collisions. A power law fit to the photon yield as a function of the number of participating nucleons gives a value of 1.12 + 0.03 for the exponent. The mean transverse momentum, 〈PT〉, of photons determined from the ratio of the measured electromagnetic transverse energy and photon multiplicity, remains almost constant with increasing ρmax. Results are compared with model predictions.

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M3 - Article

VL - 458

SP - 422

EP - 430

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 2-3

ER -