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

M. M. Aggarwal; 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; S. Bathe; B. Batiounia; T. Bernier; K. B. Bhalla; V. S. Bhatia; C. Blume; D. Bucher; H. Büsching; L. Carlén; S. Chattopadhyay; M. P. Decowski; H. Delagrange; P. Donni; M. R. Dutta Majumdar; K. El Chenawi; A. K. Dubey; K. Enosawa; S. Fokin; V. Frolov; M. S. Ganti; S. Garpman; O. Gavrishchuk; F. J M Geurts; T. K. Ghosh; R. Glasow; B. Guskov; H. Å Gustafsson; H. H. Gutbrod; I. Hrivnacova; M. Ippolitov; H. Kalechofsky; K. Karadjev; K. Karpio; B. W. Kolb; I. Kosarev; I. Koutcheryaev; A. Kugler; P. Kulinich; M. Kurata; A. Lebedev; H. Löhner; L. Luquin; D. P. Mahapatra; V. Manko; M. Martin; G. Martínez; A. Maximov; Y. Miake; G. C. Mishra; B. Mohanty; M. J. Mora; D. Morrison; T. Moukhanova; D. S. Mukhopadhyay; H. Naef; B. K. Nandi; S. K. Nayak; T. K. Nayak; A. Nianine; V. Nikitine; S. Nikolaev; P. Nilsson; S. Nishimura; P. Nomokonov; J. Nystrand; A. Oskarsson; I. Otterlund; T. Peitzmann; D. Peressounko; V. Petracek; S. C. Phatak; W. Pinganaud; F. Plasil; M. L. Purschke; J. Rak; R. Raniwala; S. Raniwala; N. K. Rao; F. Retiere; K. Reygers; G. Roland; L. Rosselet; I. Roufanov; C. Roy; J. M. Rubio; S. S. Sambyal; R. Santo; S. Sato; H. Schlagheck; H. R. Schmidt; Y. Schutz; G. Shabratova; T. H. Shah; I. Sibiriak; T. Siemiarczuk; D. Silvermyr; B. C. Sinha; N. Slavine; K. Söderström; G. Sood; S. P. Sørensen; P. Stankus; G. Stefanek; P. Steinberg; E. Stenlund; M. Sumbera; T. Svensson; A. Tsvetkov; L. Tykarski; E. C V D Pijll; N. V. Eijndhoven; G. J V Nieuwenhuizen; A. Vinogradov; Y. P. Viyogi; A. Vodopianov; S. Vörös; B. Wyslouch; G. R. Young

doi:10.1103/PhysRevLett.93.022301

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

M. M. Aggarwal, 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, S. Bathe, B. Batiounia, T. Bernier, K. B. Bhalla, V. S. Bhatia, C. Blume, D. Bucher, H. Büsching, L. Carlén, S. ChattopadhyayM. P. Decowski, H. Delagrange, P. Donni, M. R. Dutta Majumdar, K. El Chenawi, A. K. Dubey, K. Enosawa, S. Fokin, V. Frolov, M. S. Ganti, S. Garpman, O. Gavrishchuk, F. J M Geurts, T. K. Ghosh, R. Glasow, B. Guskov, H. Å Gustafsson, H. H. Gutbrod, I. Hrivnacova, M. Ippolitov, H. Kalechofsky, K. Karadjev, K. Karpio, B. W. Kolb, I. Kosarev, I. Koutcheryaev, A. Kugler, P. Kulinich, M. Kurata, A. Lebedev, H. Löhner, L. Luquin, D. P. Mahapatra, V. Manko, M. Martin, G. Martínez, A. Maximov, Y. Miake, G. C. Mishra, B. Mohanty, M. J. Mora, D. Morrison, T. Moukhanova, D. S. Mukhopadhyay, H. Naef, B. K. Nandi, S. K. Nayak, T. K. Nayak, A. Nianine, V. Nikitine, S. Nikolaev, P. Nilsson, S. Nishimura, P. Nomokonov, J. Nystrand, A. Oskarsson, I. Otterlund, T. Peitzmann, D. Peressounko, V. Petracek, S. C. Phatak, W. Pinganaud, F. Plasil, M. L. Purschke, J. Rak, R. Raniwala, S. Raniwala, N. K. Rao, F. Retiere, K. Reygers, G. Roland, L. Rosselet, I. Roufanov, C. Roy, J. M. Rubio, S. S. Sambyal, R. Santo, S. Sato, H. Schlagheck, H. R. Schmidt, Y. Schutz, G. Shabratova, T. H. Shah, I. Sibiriak, T. Siemiarczuk, D. Silvermyr, B. C. Sinha, N. Slavine, K. Söderström, G. Sood, S. P. Sørensen, P. Stankus, G. Stefanek, P. Steinberg, E. Stenlund, M. Sumbera, T. Svensson, A. Tsvetkov, L. Tykarski, E. C V D Pijll, N. V. Eijndhoven, G. J V Nieuwenhuizen, A. Vinogradov, Y. P. Viyogi, A. Vodopianov, S. Vörös, B. Wyslouch, G. R. Young

Research output: Contribution to journal › Article

45 Scopus citations

Abstract

The measurement of two-particle correlations of direct photons in central ²⁰⁸Pb + ²⁰⁸Pb collisions at 158A GeV was performed. The interferometry provided to explore the space-time dimensions of the emitting source created in elementary particle or heavy ion collisions. It was observed that the yield of soft direct photons, K_T<300 MeV/c was extracted from the correlation strength and compared to theoretical calculations. The measured yields attributed the dominant contribution in the p_T region to the hadronic phase.

Original language	English (US)
Article number	022301
Pages (from-to)	022301-1-022301-5
Journal	Physical Review Letters
Volume	93
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.93.022301
State	Published - Jul 9 2004

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.93.022301

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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., Carlén, L., ... Young, G. R. (2004). Interferometry of direct photons in central ²⁰⁸Pb + ²⁰⁸Pb collisions at 158A GeV. Physical Review Letters, 93(2), 022301-1-022301-5. [022301]. https://doi.org/10.1103/PhysRevLett.93.022301

Interferometry of direct photons in central ²⁰⁸Pb + ²⁰⁸Pb collisions at 158A GeV. / 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.; Carlén, L.; Chattopadhyay, S.; Decowski, M. P.; Delagrange, H.; Donni, P.; Dutta Majumdar, M. R.; 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. Å; Gutbrod, H. H.; Hrivnacova, I.; Ippolitov, M.; Kalechofsky, H.; Karadjev, K.; Karpio, K.; Kolb, B. W.; Kosarev, I.; Koutcheryaev, I.; Kugler, A.; Kulinich, P.; Kurata, M.; Lebedev, A.; Löhner, H.; Luquin, L.; Mahapatra, D. P.; Manko, V.; Martin, M.; Martínez, G.; Maximov, A.; Miake, Y.; Mishra, G. C.; Mohanty, B.; Mora, M. J.; Morrison, D.; Moukhanova, 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.; Peitzmann, T.; Peressounko, D.; Petracek, V.; Phatak, S. C.; Pinganaud, W.; Plasil, F.; Purschke, M. L.; Rak, J.; 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.; Söderström, K.; Sood, G.; Sørensen, S. P.; Stankus, P.; Stefanek, G.; Steinberg, P.; Stenlund, E.; Sumbera, M.; Svensson, T.; Tsvetkov, A.; Tykarski, L.; Pijll, E. C V D; Eijndhoven, N. V.; Nieuwenhuizen, G. J V; Vinogradov, A.; Viyogi, Y. P.; Vodopianov, A.; Vörös, S.; Wyslouch, B.; Young, G. R.

In: Physical Review Letters, Vol. 93, No. 2, 022301, 09.07.2004, p. 022301-1-022301-5.

Research output: Contribution to journal › Article

Aggarwal, MM, Ahammed, Z, Angelis, ALS, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, V, Awes, TC, Baba, PVKS, Badyal, SK, Bathe, S, Batiounia, B, Bernier, T, Bhalla, KB, Bhatia, VS, Blume, C, Bucher, D, Büsching, H, Carlén, L, Chattopadhyay, S, Decowski, MP, Delagrange, H, Donni, P, Dutta Majumdar, MR, El Chenawi, K, Dubey, AK, Enosawa, K, Fokin, S, Frolov, V, Ganti, MS, Garpman, S, Gavrishchuk, O, Geurts, FJM, Ghosh, TK, Glasow, R, Guskov, B, Gustafsson, HÅ, Gutbrod, HH, Hrivnacova, I, Ippolitov, M, Kalechofsky, H, Karadjev, K, Karpio, K, Kolb, BW, Kosarev, I, Koutcheryaev, I, Kugler, A, Kulinich, P, Kurata, M, Lebedev, A, Löhner, H, Luquin, L, Mahapatra, DP, Manko, V, Martin, M, Martínez, G, Maximov, A, Miake, Y, Mishra, GC, Mohanty, B, Mora, MJ, Morrison, D, Moukhanova, 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, Phatak, SC, Pinganaud, W, Plasil, F, Purschke, ML, Rak, J, Raniwala, R, Raniwala, S, Rao, NK, Retiere, F, Reygers, K, Roland, G, Rosselet, L, Roufanov, I, Roy, C, Rubio, JM, Sambyal, SS, Santo, R, Sato, S, Schlagheck, H, Schmidt, HR, Schutz, Y, Shabratova, G, Shah, TH, Sibiriak, I, Siemiarczuk, T, Silvermyr, D, Sinha, BC, Slavine, N, Söderström, K, Sood, G, Sørensen, SP, Stankus, P, Stefanek, G, Steinberg, P, Stenlund, E, Sumbera, M, Svensson, T, Tsvetkov, A, Tykarski, L, Pijll, ECVD, Eijndhoven, NV, Nieuwenhuizen, GJV, Vinogradov, A, Viyogi, YP, Vodopianov, A, Vörös, S, Wyslouch, B & Young, GR 2004, 'Interferometry of direct photons in central ²⁰⁸Pb + ²⁰⁸Pb collisions at 158A GeV', Physical Review Letters, vol. 93, no. 2, 022301, pp. 022301-1-022301-5. https://doi.org/10.1103/PhysRevLett.93.022301

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. ; Carlén, L. ; Chattopadhyay, S. ; Decowski, M. P. ; Delagrange, H. ; Donni, P. ; Dutta Majumdar, M. R. ; 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. Å ; Gutbrod, H. H. ; Hrivnacova, I. ; Ippolitov, M. ; Kalechofsky, H. ; Karadjev, K. ; Karpio, K. ; Kolb, B. W. ; Kosarev, I. ; Koutcheryaev, I. ; Kugler, A. ; Kulinich, P. ; Kurata, M. ; Lebedev, A. ; Löhner, H. ; Luquin, L. ; Mahapatra, D. P. ; Manko, V. ; Martin, M. ; Martínez, G. ; Maximov, A. ; Miake, Y. ; Mishra, G. C. ; Mohanty, B. ; Mora, M. J. ; Morrison, D. ; Moukhanova, 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. ; Peitzmann, T. ; Peressounko, D. ; Petracek, V. ; Phatak, S. C. ; Pinganaud, W. ; Plasil, F. ; Purschke, M. L. ; Rak, J. ; 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. ; Söderström, K. ; Sood, G. ; Sørensen, S. P. ; Stankus, P. ; Stefanek, G. ; Steinberg, P. ; Stenlund, E. ; Sumbera, M. ; Svensson, T. ; Tsvetkov, A. ; Tykarski, L. ; Pijll, E. C V D ; Eijndhoven, N. V. ; Nieuwenhuizen, G. J V ; Vinogradov, A. ; Viyogi, Y. P. ; Vodopianov, A. ; Vörös, S. ; Wyslouch, B. ; Young, G. R. / Interferometry of direct photons in central ²⁰⁸Pb + ²⁰⁸Pb collisions at 158A GeV. In: Physical Review Letters. 2004 ; Vol. 93, No. 2. pp. 022301-1-022301-5.

@article{4dbd32087a824bc5b4c64432bdb5af38,

title = "Interferometry of direct photons in central 208Pb + 208Pb collisions at 158A GeV",

abstract = "The measurement of two-particle correlations of direct photons in central 208Pb + 208Pb collisions at 158A GeV was performed. The interferometry provided to explore the space-time dimensions of the emitting source created in elementary particle or heavy ion collisions. It was observed that the yield of soft direct photons, KT<300 MeV/c was extracted from the correlation strength and compared to theoretical calculations. The measured yields attributed the dominant contribution in the pT region to the hadronic phase.",

author = "Aggarwal, {M. M.} 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 S. Bathe and B. Batiounia and T. Bernier and Bhalla, {K. B.} and Bhatia, {V. S.} and C. Blume and D. Bucher and H. B{\"u}sching and L. Carl{\'e}n and S. Chattopadhyay and Decowski, {M. P.} and H. Delagrange and P. Donni and {Dutta Majumdar}, {M. R.} and {El Chenawi}, K. and Dubey, {A. K.} and K. Enosawa 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 B. Guskov and Gustafsson, {H. {\AA}} and Gutbrod, {H. H.} and I. Hrivnacova and M. Ippolitov and H. Kalechofsky and K. Karadjev and K. Karpio and Kolb, {B. W.} and I. Kosarev and I. Koutcheryaev and A. Kugler and P. Kulinich and M. Kurata and A. Lebedev and H. L{\"o}hner and L. Luquin and Mahapatra, {D. P.} and V. Manko and M. Martin and G. Mart{\'i}nez and A. Maximov and Y. Miake and Mishra, {G. C.} and B. Mohanty and Mora, {M. J.} and D. Morrison and T. Moukhanova and Mukhopadhyay, {D. S.} and H. Naef and Nandi, {B. K.} and Nayak, {S. K.} and Nayak, {T. K.} and A. Nianine and V. Nikitine and S. Nikolaev and P. Nilsson and S. Nishimura and P. Nomokonov and J. Nystrand and A. Oskarsson and I. Otterlund and T. Peitzmann and D. Peressounko and V. Petracek and Phatak, {S. C.} and W. Pinganaud and F. Plasil and Purschke, {M. L.} and J. Rak and R. Raniwala and S. Raniwala 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 Sambyal, {S. S.} and R. Santo and S. Sato and H. Schlagheck and Schmidt, {H. R.} and Y. Schutz 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 G. Sood and S{\o}rensen, {S. P.} and P. Stankus and G. Stefanek and P. Steinberg and E. Stenlund and M. Sumbera and T. Svensson and A. Tsvetkov and L. Tykarski and Pijll, {E. C V D} 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. Wyslouch and Young, {G. R.}",

year = "2004",

month = jul,

day = "9",

doi = "10.1103/PhysRevLett.93.022301",

language = "English (US)",

volume = "93",

pages = "022301--1--022301--5",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "2",

}

TY - JOUR

T1 - Interferometry of direct photons in central 208Pb + 208Pb collisions at 158A GeV

AU - Aggarwal, M. M.

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 - Bathe, S.

AU - Batiounia, B.

AU - Bernier, T.

AU - Bhalla, K. B.

AU - Bhatia, V. S.

AU - Blume, C.

AU - Bucher, D.

AU - Büsching, H.

AU - Carlén, L.

AU - Chattopadhyay, S.

AU - Decowski, M. P.

AU - Delagrange, H.

AU - Donni, P.

AU - Dutta Majumdar, M. R.

AU - El Chenawi, K.

AU - Dubey, A. K.

AU - Enosawa, K.

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 - Guskov, B.

AU - Gustafsson, H. Å

AU - Gutbrod, H. H.

AU - Hrivnacova, I.

AU - Ippolitov, M.

AU - Kalechofsky, H.

AU - Karadjev, K.

AU - Karpio, K.

AU - Kolb, B. W.

AU - Kosarev, I.

AU - Koutcheryaev, I.

AU - Kugler, A.

AU - Kulinich, P.

AU - Kurata, M.

AU - Lebedev, A.

AU - Löhner, H.

AU - Luquin, L.

AU - Mahapatra, D. P.

AU - Manko, V.

AU - Martin, M.

AU - Martínez, G.

AU - Maximov, A.

AU - Miake, Y.

AU - Mishra, G. C.

AU - Mohanty, B.

AU - Mora, M. J.

AU - Morrison, D.

AU - Moukhanova, T.

AU - Mukhopadhyay, D. S.

AU - Naef, H.

AU - Nandi, B. K.

AU - Nayak, S. K.

AU - Nayak, T. K.

AU - Nianine, A.

AU - Nikitine, V.

AU - Nikolaev, S.

AU - Nilsson, P.

AU - Nishimura, S.

AU - Nomokonov, P.

AU - Nystrand, J.

AU - Oskarsson, A.

AU - Otterlund, I.

AU - Peitzmann, T.

AU - Peressounko, D.

AU - Petracek, V.

AU - Phatak, S. C.

AU - Pinganaud, W.

AU - Plasil, F.

AU - Purschke, M. L.

AU - Rak, J.

AU - Raniwala, R.

AU - Raniwala, 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 - Sambyal, S. S.

AU - Santo, R.

AU - Sato, S.

AU - Schlagheck, H.

AU - Schmidt, H. R.

AU - Schutz, Y.

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 - Sood, G.

AU - Sørensen, S. P.

AU - Stankus, P.

AU - Stefanek, G.

AU - Steinberg, P.

AU - Stenlund, E.

AU - Sumbera, M.

AU - Svensson, T.

AU - Tsvetkov, A.

AU - Tykarski, L.

AU - Pijll, E. C V D

AU - Eijndhoven, N. V.

AU - Nieuwenhuizen, G. J V

AU - Vinogradov, A.

AU - Viyogi, Y. P.

AU - Vodopianov, A.

AU - Vörös, S.

AU - Wyslouch, B.

AU - Young, G. R.

PY - 2004/7/9

Y1 - 2004/7/9

N2 - The measurement of two-particle correlations of direct photons in central 208Pb + 208Pb collisions at 158A GeV was performed. The interferometry provided to explore the space-time dimensions of the emitting source created in elementary particle or heavy ion collisions. It was observed that the yield of soft direct photons, KT<300 MeV/c was extracted from the correlation strength and compared to theoretical calculations. The measured yields attributed the dominant contribution in the pT region to the hadronic phase.

AB - The measurement of two-particle correlations of direct photons in central 208Pb + 208Pb collisions at 158A GeV was performed. The interferometry provided to explore the space-time dimensions of the emitting source created in elementary particle or heavy ion collisions. It was observed that the yield of soft direct photons, KT<300 MeV/c was extracted from the correlation strength and compared to theoretical calculations. The measured yields attributed the dominant contribution in the pT region to the hadronic phase.

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U2 - 10.1103/PhysRevLett.93.022301

DO - 10.1103/PhysRevLett.93.022301

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VL - 93

SP - 022301-1-022301-5

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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ER -