Table of Contents
ISRN High Energy Physics
Volume 2013, Article ID 156747, 8 pages
http://dx.doi.org/10.1155/2013/156747
Research Article

Free Energy Evolution and Photon Radiation from QGP

Department of Physics and Astro-Physics, University of Delhi, Delhi-110007, India

Received 12 July 2013; Accepted 29 August 2013

Academic Editors: M. Masip and Z. H. Xiong

Copyright © 2013 Yogesh Kumar and S. Somorendro Singh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. J. W. Harris and B. M. Müller, “The search for the quark gluon plasma,” Annual Review of Nuclear and Particle Science, vol. 46, pp. 71–107, 1996. View at Publisher · View at Google Scholar
  2. K. Geiger and B. M. Müller, “Dynamics of parton cascades in highly relativistic nuclear collisions,” Nuclear Physics B, vol. 369, no. 3, pp. 600–654, 1992. View at Publisher · View at Google Scholar
  3. I. Arsene, I. G. Bearden, D. Beavis et al., “Quark-gluon plasma and color glass condensate at RHIC? The perspective from the BRAHMS experiment,” Nuclear Physics A, vol. 757, no. 1-2, pp. 1–27, 2005. View at Publisher · View at Google Scholar
  4. B. B. Back, M. D. Baker, M. Ballintijn et al., “The PHOBOS perspective on discoveries at RHIC,” Nuclear Physics A, vol. 757, no. 1-2, pp. 28–101, 2005. View at Publisher · View at Google Scholar
  5. J. Adams, M. M. Aggarwal, Z. Ahammed et al., “Experimental and theoretical challenges in the search for the quark-gluon plasma: the STAR Collaboration's critical assessment of the evidence from RHIC collisions,” Nuclear Physics A, vol. 757, no. 1-2, pp. 102–183, 2005. View at Publisher · View at Google Scholar
  6. K. Adcox, S. S. Adler, S. Afanasiev et al., “Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: experimental evaluation by the PHENIX Collaboration,” Nuclear Physics A, vol. 757, no. 1-2, pp. 184–283, 2005. View at Publisher · View at Google Scholar
  7. F. Karsch and E. Laermann, “Examples of soft physics observables in the ALICE experiment,” in Quark-Gluon Plasma, R. C. Hwa and X. N. Wang, Eds., World Scientific, Singapore, 2004. View at Google Scholar
  8. Quark Matter 2001: Proceedings of the 15th International Conference on Ultra Relativistic Nucleus-Nucleus Collisions, vol. 698 of Nuclear Physics A, North-Holland, Amsterdam, The Netherlands, 2002.
  9. E. V. Shuryak, “Quantum chromodynamics and the theory of superdense matter,” Physics Reports, vol. 61, no. 2, pp. 71–158, 1980. View at Publisher · View at Google Scholar
  10. K. Kajantie and H. I. Miettinen, “Temperature measurement of quark-gluon plasma formed in high energy nucleus-nucleus collisions,” Zeitschrift für Physik C, vol. 9, no. 4, pp. 341–345, 1981. View at Publisher · View at Google Scholar · View at Scopus
  11. G. Domokos and J. Goldman, “Quark-matter diagonstics,” Physical Review D, vol. 23, p. 203, 1981. View at Google Scholar
  12. L. D. McLerran and T. Toimela, “Photon and dilepton emission from the quark-gluon plasma: some general considerations,” Physical Review D, vol. 31, no. 3, pp. 545–563, 1985. View at Publisher · View at Google Scholar · View at Scopus
  13. C. Gale and J. I. Kapusta, “Vector dominance model at finite temperature,” Nuclear Physics B, vol. 357, no. 1, pp. 65–89, 1991. View at Publisher · View at Google Scholar
  14. J. Alam, S. Raha, and B. Sinha, “Electromagnetic probes of quark gluon plasma,” Physics Reports, vol. 273, no. 5-6, pp. 243–362, 1996. View at Publisher · View at Google Scholar
  15. T. Peitzmann and M. H. Thoma, “Direct photons from relativistic heavy-ion collisions,” Physics Reports, vol. 364, no. 3, pp. 175–246, 2002. View at Publisher · View at Google Scholar
  16. W. Cassing and E. L. Bratkovskaya, “Hadronic and electromagnetic probes of hot and dense nuclear matter,” Physics Report, vol. 308, no. 2, pp. 65–233, 1999. View at Google Scholar · View at Scopus
  17. P. Aurenche, “Photon production in heavy ion collisions,” http://arxiv.org/abs/hep-ph/0201011.
  18. J. Kapusta, P. Lichard, and D. Seibert, “High-energy photons from quark-gluon plasma versus hot hadronic gas,” Physical Review D, vol. 44, no. 9, pp. 2774–2788, 1991. View at Publisher · View at Google Scholar · View at Scopus
  19. J. Kapusta, P. Lichard, and D. Seibert, “Erratum: high-energy photons from quark-gluon plasma versus hot hadronic gas,” Physical Review D, vol. 47, no. 9, p. 4171, 1993. View at Publisher · View at Google Scholar
  20. R. Baier, H. Nakkagawa, A. Niégawa, and K. Redlich, “Production rate of hard thermal photons and screening of quark mass singularity,” Zeitschrift für Physik C, vol. 53, no. 3, pp. 433–438, 1992. View at Publisher · View at Google Scholar · View at Scopus
  21. J. Alam, S. Sarkar, T. Hatsuda, T. K. Nayak, and B. Sinha, “Photons from Pb-Pb collisions at ultrarelativistic energies,” Physical Review C, vol. 63, no. 2, Article ID 021901, 5 pages, 2001. View at Publisher · View at Google Scholar
  22. M. M. Aggarwal, A. Agnihotri, Z. Ahammed et al., “Observation of direct photons in central 158A GeV 208P208b+Pb collisions,” Physical Review Letters, vol. 85, no. 17, pp. 3595–3599, 2000. View at Publisher · View at Google Scholar
  23. M. M. Aggarwal, A. Agnihotri, Z. Ahammed et al., “Direct photon production in 158 A GeV 208Pb + 208Pb collisions,” http://arxiv.org/abs/nucl-ex/0006007.
  24. M. M. Aggarwal, A. Agnihotri, Z. Ahammed et al., “Scaling of particle and transverse energy production in 208Pb+208Pb collisions at 158 A GeV,” European Physical Journal C, vol. 18, pp. 651–663, 2001. View at Publisher · View at Google Scholar
  25. M. M. Aggarwal, Z. Ahammed, A. L. S. Angelis et al., “Interferometry of direct photons in central 208Pb+208Pb collisions at 158A GeV,” Physical Review Letters, vol. 93, no. 2, Article ID 022301, 5 pages, 2004. View at Publisher · View at Google Scholar
  26. R. Albrecht, V. Antonenko, T. C. Awes et al., “Limits on the production of direct photons in 200A GeV 32S+Au collisions,” Physical Review Letters, vol. 76, no. 19, pp. 3506–3509, 1996. View at Publisher · View at Google Scholar
  27. D. P. Morrison, Y. Akiba, O. Alford et al., “The PHENIX experiment at RHIC,” Nuclear Physics A, vol. 638, no. 1-2, pp. 565c–569c, 1998. View at Publisher · View at Google Scholar
  28. S. Y. Wang and D. Boyanovsky, “Enhanced photon production from quark-gluon plasma: finite-lifetime effect,” Physical Review D, vol. 63, no. 5, Article ID 051702, 5 pages, 2001. View at Google Scholar
  29. D. Boyanovsky and H. J. de Vega, “Are direct photons a clean signal of a thermalized quark-gluon plasma?” Physical Review D, vol. 68, no. 6, Article ID 065018, 26 pages, 2003. View at Publisher · View at Google Scholar
  30. S. Sarkar, P. Roy, J. Alam, and B. Sinha, “Photons from Pb+Pb and S+Au collisions at ultrarelativistic energies,” Physical Review C, vol. 60, no. 5, Article ID 054907, 6 pages, 1999. View at Publisher · View at Google Scholar
  31. D. K. Srivastava and B. Sinha, “Single photons from S + Au collisions at CERN super proton synchrotron and quark-hadron phase transition,” Physical Review Letters, vol. 73, no. 18, pp. 2421–2424, 1994. View at Publisher · View at Google Scholar
  32. R. D. Pisarski, “Computing finite-temperature loops with ease,” Nuclear Physics B, vol. 309, no. 3, pp. 476–492, 1988. View at Publisher · View at Google Scholar
  33. R. D. Pisarski, “Scattering amplitudes in hot gauge theories,” Physical Review Letters, vol. 63, pp. 1129–1132, 1989. View at Publisher · View at Google Scholar
  34. E. Braaten and R. D. Pisarski, “Soft amplitudes in hot gauge theories: a general analysis,” Nuclear Physics B, vol. 337, no. 3, pp. 569–634, 1990. View at Google Scholar · View at Scopus
  35. Y. Kumar and S. S. Singh, “Dilepton production in finite baryonic quark-gluon plasma,” Canadian Journal of Physics, vol. 90, no. 10, pp. 955–961, 2012. View at Publisher · View at Google Scholar
  36. R. Ramanathan, Y. K. Mathur, K. K. Gupta, and A. K. Jha, “Simple statistical model for analysis of quark-gluon plasma droplet (fireball) formation,” Physical Review C, vol. 70, no. 2, Article ID 061408, 4 pages, 2004. View at Publisher · View at Google Scholar
  37. R. Ramanathan, K. K. Gupta, A. K. Jha, and S. S. Singh, “The interfacial surface tension of a quark-gluon plasma fireball in a hadronic medium,” Pramana, vol. 68, no. 5, pp. 757–768, 2007. View at Publisher · View at Google Scholar · View at Scopus
  38. R. Balian and C. Block, “Distribution of eigenfrequencies for the wave equation in a finite domain: I. Three-dimensional problem with smooth boundary surface,” Annals of Physics, vol. 64, no. 2, pp. 401–447, 1970. View at Publisher · View at Google Scholar
  39. I. Mardor and B. Svetitsky, “Bubble free energy at the quark-hadron phase transition,” Physical Review D, vol. 44, no. 3, pp. 878–886, 1991. View at Google Scholar
  40. G. Neerguard and J. Madsen, “Free energy of bubbles and droplets in the quark-hadron phase transition,” Physical Review D, vol. 60, no. 5, Article ID 054011, 12 pages, 1999. View at Google Scholar
  41. M. G. Mustafa, D. K. Srivastava, and B. Sinha, “Effect of colour singletness of quark-gluon plasma in quark-hadron phase transition,” The European Physical Journal C, vol. 5, no. 4, pp. 711–718, 1998. View at Publisher · View at Google Scholar
  42. A. Peshier, B. Kämpfer, O. P. Pavlenko, and G. Soff, “An effective model of the quark-gluon plasma with thermal parton masses,” Physics Letters B, vol. 337, no. 3-4, pp. 235–239, 1994. View at Publisher · View at Google Scholar
  43. H. A. Bethe, “Nuclear physics: B nuclear dynamics, theoretical,” Reviews of Modern Physics, vol. 9, no. 2, pp. 69–244, 1937. View at Publisher · View at Google Scholar
  44. E. Fermi, “Eine statistische Methode zur Bestimmung einiger Eigenschaften des Atoms und ihre Anwendung auf die Theorie des periodischen Systems der Elemente,” Zeitschrift für Physik, vol. 48, no. 1-2, pp. 73–79, 1928. View at Publisher · View at Google Scholar
  45. L. H. Thomas, “The calculation of atomic fields,” Proceedings of the Cambridge Philosophical Society, vol. 23, no. 5, pp. 542–548, 1927. View at Google Scholar
  46. H. Weyl, Über die Asymptotische Verteilung der Eigenwerte, Nachrichten der Akademie der Wissenschaften, Göttingen, Germany, 1911.
  47. G. D. Moore, “Electromagnetic emission and energy loss in the QGP,” Journal of Physics G, vol. 30, no. 8, 2004. View at Publisher · View at Google Scholar
  48. V. Ruuskanen, in Quark-Gluon Plasma, R. C. Hwa, Ed., World Scientific, Singapore, 1991.
  49. C. T. Traxler, H. Vija, and M. H. Thoma, “Hard photon production rate of a quark-gluon plasma at finite quark chemical potential,” Physics Letters B, vol. 346, no. 3-4, pp. 329–334, 1995. View at Publisher · View at Google Scholar
  50. P. Aurenche, F. Elis, R. Kobes, and H. Zaraket, “Bremsstrahlung and photon production in thermal QCD,” Physical Review D, vol. 58, Article ID 085003, 17 pages, 1998. View at Publisher · View at Google Scholar
  51. D. K. Srivastava, “Single photons, dileptons and hadrons from relativistic heavy ion collisions and quark-hadron phase transition,” Pramana, vol. 57, no. 2-3, pp. 235–249, 2001. View at Publisher · View at Google Scholar
  52. D. K. Srivastava, “Photon production in relativistic heavy-ion collisions using rates with two-loop calculations from quark matter,” The European Physical Journal C, vol. 10, pp. 487–490, 1999. View at Publisher · View at Google Scholar
  53. F. D. Steffen and M. H. Thoma, “Hard thermal photon production in relativistic heavy ion collisions,” Physics Letters B, vol. 510, pp. 98–106, 2001. View at Publisher · View at Google Scholar
  54. T. Renk, “Emission of thermal photons and the equilibration time in heavy-ion collisions,” Physical Review C, vol. 67, no. 6, Article ID 064901, 8 pages, 2003. View at Publisher · View at Google Scholar
  55. C. T. Traxler and M. H. Thoma, “Photon emission from a parton gas at chemical nonequilibrium,” Physical Review C, vol. 53, no. 3, pp. 1348–1352, 1996. View at Publisher · View at Google Scholar
  56. J. Y. Ollitrault, “Relativistic hydrodynamics for heavy-ion collisions,” European Journal of Physics, vol. 29, no. 2, p. 275, 2008. View at Publisher · View at Google Scholar
  57. M. Martinez and M. Strickland, “Pre-equilibrium dilepton production from an anisotropic quark-gluon plasma,” Physical Review C, vol. 78, no. 3, Article ID 034917, 19 pages, 2008. View at Publisher · View at Google Scholar
  58. A. Adare, S. Afanasiev, C. Aidala et al., “Enhanced production of direct photons in Au+Au collisions at SNN=200 GeV and implications for the initial temperature,” Physical Review Letters, vol. 104, no. 13, Article ID 132301, 2010. View at Google Scholar
  59. H. B. Büsching, “Highlights from the PHENIX experiment—part 2,” Nuclear Physics A, vol. 774, pp. 103–112, 2006. View at Publisher · View at Google Scholar
  60. T. Isobe, H. Gustafsson, E. Haslum et al., “Systematic study of high-pT direct photon production with the PHENIX experiment at RHIC,” Journal of Physics G, vol. 34, no. 8, 2007. View at Publisher · View at Google Scholar
  61. J. Alam, J. K. Nayak, P. Roy, A. K. Dutt-Mazumder, and B. Sinha, “Thermal radiation from Au+Au collisions at SNN = 200 GeV energy,” Journal of Physics G, vol. 34, no. 5, p. 871, 2007. View at Publisher · View at Google Scholar
  62. C. Gale, S. Turbide, E. Frodermann, and U. Heinz, “Photons from nuclear collisions at RHIC energies,” Journal of Physics G, vol. 35, no. 10, Article ID 104119, 2008. View at Publisher · View at Google Scholar · View at Scopus
  63. K. Dusling and I. Zahed, “Thermal photons from heavy ion collisions: a spectral function approach,” Physical Review C, vol. 82, no. 5, Article ID 054909, 11 pages, 2010. View at Publisher · View at Google Scholar