Preliminary results on direct photon-photon HBT measurements in square root sNN = 62.4 GeV and 200 GeV Au+Au collisions at RHIC

• Autorzy: Das D. , Lin G. , Chattopadhyay S. , Chikanian A. , Finch E. , Nayak T. , Panitkin S. , Sandweiss J. , Suaide A. , Zhang H.
• Konferencja: Proceedings of the 18th International conference on Nucleus-Nucleus Collisions QUARK MATTER 2005, 4-9 August, 2005, Budapest, Hungary
• Języki publikacji: EN

Abstrakty

EN

We present the preliminary results on direct photon interferometry measurements in Au+Au collisions at square root sNN = 62.4 GeV and 200 GeV using the STAR (solenoidal tracker at RHIC) detector. Photons are reconstructed via e+/e- conversions in STAR Time Projection Chamber (TPC) and energy deposited by photons in STAR Barrel Electromagnetic Calorimeter (BEMC). The two-photon correlations are measured using (1) both photons measured with BEMC; (2) one photon from conversions and the other measured with BEMC. Both the methodologies and the possible constraints in the correlation function measurements are discussed.

Słowa kluczowe

EN

RHIC; HBT; interferometry; TPC; BEMC; photon

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2006
• Tom: Vol. 51,suppl.3
• Strony: 55--58
• Opis fizyczny: s. 55--58, Bibliogr. 15 poz., rys.

Twórcy

autor

Das D.

autor

Lin G.

autor

Chattopadhyay S.

autor

Chikanian A.

autor

Finch E.

autor

Nayak T.

autor

Panitkin S.

autor

Sandweiss J.

autor

Suaide A.

autor

Zhang H.

• Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700064, India, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Adams J et al. (STAR Collaboration) (2004)Measurements of transverse energy distributions in Au+Au collisions at sqrt [sNN] = 200 GeV. Phys Rev C 70:054907
• 2. Adams J et al. (STAR Collaboration) (2005) Pion interferometry in Au+Au collisions at sqrt [sNN] = 200 GeV.Phys Rev C 71:044906
• 3. Adler C et al. (STAR Collaboration) (2001) Pion interferometry of sqrt [sNN] = 130 GeV Au+Au collisions at RHIC. Phys Rev Lett 87:082301
• 4. Aggarwal MM et al. (WA98 Collaboration) (2004)Interferometry of direct photons in central Pb+Pb collisions at 158A GeV. Phys Rev Lett 93:022301
• 5. Alam J, Mohanty B, Roy P, Sarkar S, Sinha B (2003) Photon interferometry and the size of the hot zone in relativistic heavy ion collisions. Phys Rev C 67:054902
• 6. Anderson M, Berkovitz J, Betts W et al. (2003) Time projection chamber: a unique tool for studying high multiplicity events at RHIC. Nucl Instrum Methods Phys Res A 499:659?678
• 7. Bass SA, Muller B, Srivastava DK (2004) Photon interferometry of Au+Au collisions at the BNL relativistic heavy-ion collider. Phys Rev Lett 93:162301
• 8. Beddo M, Bielick E, Fornek T et al. (2003) The STAR barrel electromagnetic calorimeter. Nucl Instrum Methods Phys Res A 499:725?739
• 9. Boal D, Gelbke CK, Jennings B (1990) Intensity interferometry in subatomic physics. Rev Mod Phys 62:553?602
• 10. Hanbury-Brown R, Twiss RQ (1956) A test of a new type of stellar interferometer on Sirius. Nature 178:1046?1048
• 11. Heinz U, Jacak BV (1999) Two-particle correlations in relativistic heavy-ion collisions. Ann Rev Nucl Sci 49:529?579
• 12. Peressounko D (2003) Hanbury Brown-Twiss interferometry of direct photons in heavy ion collisions.Phys Rev C 67:014905
• 13. Srivastava DK, Kapusta JI (1993) History of quark-gluon plasma evolution from photon interferometry. Phys Rev C 48:1335?1345
• 14. Srivastava DK, Kapusta JI (1993) Nature of photon correlation function for quark-gluon plasma. Phys Rev C 50:505?508
• 15. Timmermann A, Plumer M, Razumov L, Weiner RM (1994) Photon interferometry of quark-gluon dynamics reexamined. Phys Rev C 50:3060?3063