Bose-Einstein correlations of $\pi^{-}\pi^{-}$ pairs in central Pb+Pb collisions at 20A,30A,40A,80A, and 158A GeV

Alt, C.; Grebieszkow, K.; Yoo, I.K.; Peryt, W.; Gladysz, E.; Eckardt, V.; Lungwitz, B.; Fodor, Z.; Schmitz, N.; Sziklai, J.; Bartke, J.; Chung, P.; Kadija, K.; Friese, V.; Sikler, F.; Csato, P.; Slodkowski, M.; Wlodarczyk, Z.; Vassiliou, M.; Bialkowska, H.; Georgopoulos, G.; Strabel, C.; Laszlo, A.; Melkumov, G.L.; Kolesnikov, V.I.; Rybczynski, M.; Blume, C.; Cramer, J.G.; Panagiotou, A.D.; Pluta, J.; Szuba, M.; Stefanek, G.; Barna, D.; van Leeuwen, M.; Vranic, D.; Kraus, I.; Chvala, O.; Roland, G.; Hohne, C.; Gal, J.; Hegyi, S.; Makariev, M.; Mischke, A.; Petridis, A.; Palla, G.; Botje, M.; Mitrovski, M.; Mrowczynski, St.; Foka, P.; Dinkelaker, P.; Baatar, B.; Kowalski, M.; Kniege, S.; Christakoglou, P.; Litov, L.; Bramm, R.; Levai, P.; Skrzypczak, E.; Gazdzicki, M.; Kornas, E.; Sitar, B.; Susa, T.; Anticic, T.; Flierl, D.; Lacey, R.; Rybicki, A.; Betev, L.; Strobele, H.; Pikna, M.; Genchev, V.; Molnar, J.; Szentpetery, I.; Mateev, M.; Puhlhofer, F.; Korus, R.; Szymanski, P.; Malakhov, A.I.; Trubnikov, V.; Kreps, M.; Renfordt, R.; Zimanyi, J.; Prindle, D.; Buncic, P.; Schuster, T.; Cerny, V.; Karev, A.; Boimska, B.; Kliemant, M.; Kikola, D.; Varga, D.; Wojtaszek, A.; Seyboth, P.; Stock, R.; Nicolic, V.; Veres, G.I.; Vesztergombi, G.; Bracinik, J.; Panayotov, D.; Sandoval, A.; Wetzler, A.; Roland, C.

doi:10.1103/PhysRevC.77.064908

Article
Report number	arXiv:0709.4507
Title	Bose-Einstein correlations of $\pi^{-}\pi^{-}$ pairs in central Pb+Pb collisions at 20A,30A,40A,80A, and 158A GeV
Preprint title	Bose-Einstein correlations of pion pairs in central Pb+Pb collisions at CERN SPS energies
Author(s)	Alt, C. (Frankfurt U.) ; Anticic, T. (Boskovic Inst., Zagreb) ; Baatar, B. (Dubna, JINR) ; Barna, D. (Budapest, RMKI) ; Bartke, J. (Cracow, INP) ; Betev, L. (CERN) ; Bialkowska, H. (Warsaw, Inst. Nucl. Studies) ; Blume, C. (Frankfurt U.) ; Boimska, B. (Warsaw, Inst. Nucl. Studies) ; Botje, M. (NIKHEF, Amsterdam) ; Bracinik, J. (Comenius U.) ; Bramm, R. (Frankfurt U.) ; Buncic, P. (CERN) ; Cerny, V. (Comenius U.) ; Christakoglou, P. (Athens U.) ; Chung, P. (SUNY, Stony Brook, Chem. Dept.) ; Chvala, O. (Charles U.) ; Cramer, J.G. (Washington U., Seattle) ; Csato, P. (Budapest, RMKI) ; Dinkelaker, P. (Frankfurt U.) ; Eckardt, V. (Munich, Max Planck Inst.) ; Flierl, D. (Frankfurt U.) ; Fodor, Z. (Budapest, RMKI) ; Foka, P. (Darmstadt, GSI) ; Friese, V. (Darmstadt, GSI) ; Gal, J. (Budapest, RMKI) ; Gazdzicki, M. (Frankfurt U. ; Jan Kochanowski U.) ; Genchev, V. (Sofiya, Inst. Nucl. Res.) ; Georgopoulos, G. (Athens U.) ; Gladysz, E. (Cracow, INP) ; Grebieszkow, K. (Warsaw U. of Tech.) ; Hegyi, S. (Budapest, RMKI) ; Hohne, C. (Darmstadt, GSI) ; Kadija, K. (Boskovic Inst., Zagreb) ; Karev, A. (Munich, Max Planck Inst.) ; Kikola, D. (Warsaw U. of Tech.) ; Kliemant, M. (Frankfurt U.) ; Kniege, S. (Frankfurt U.) ; Kolesnikov, V.I. (Dubna, JINR) ; Kornas, E. (Cracow, INP) ; Korus, R. (Jan Kochanowski U.) ; Kowalski, M. (Cracow, INP) ; Kraus, I. (Darmstadt, GSI) ; Kreps, M. (Comenius U.) ; Laszlo, A. (Budapest, RMKI) ; Lacey, R. (SUNY, Stony Brook, Chem. Dept.) ; van Leeuwen, M. (NIKHEF, Amsterdam) ; Levai, P. (Budapest, RMKI) ; Litov, L. (Sofiya U.) ; Lungwitz, B. (Frankfurt U.) ; Makariev, M. (Sofiya U.) ; Malakhov, A.I. (Dubna, JINR) ; Mateev, M. (Sofiya U.) ; Melkumov, G.L. (Dubna, JINR) ; Mischke, A. (NIKHEF, Amsterdam) ; Mitrovski, M. (Frankfurt U.) ; Molnar, J. (Budapest, RMKI) ; Mrowczynski, St. (Jan Kochanowski U.) ; Nicolic, V. (Boskovic Inst., Zagreb) ; Palla, G. (Budapest, RMKI) ; Panagiotou, A.D. (Athens U.) ; Panayotov, D. (Sofiya U.) ; Petridis, A. (Athens U.) ; Peryt, W. (Warsaw U. of Tech.) ; Pikna, M. (Comenius U.) ; Pluta, J. (Warsaw U. of Tech.) ; Prindle, D. (Washington U., Seattle) ; Puhlhofer, F. (Philipps U. Marburg) ; Renfordt, R. (Frankfurt U.) ; Roland, C. (MIT) ; Roland, G. (MIT) ; Rybczynski, M. (Jan Kochanowski U.) ; Rybicki, A. (Cracow, INP ; CERN) ; Sandoval, A. (Darmstadt, GSI) ; Schmitz, N. (Munich, Max Planck Inst.) ; Schuster, T. (Frankfurt U.) ; Seyboth, P. (Munich, Max Planck Inst.) ; Sikler, F. (Budapest, RMKI) ; Sitar, B. (Comenius U.) ; Skrzypczak, E. (Warsaw U.) ; Slodkowski, M. (Warsaw U. of Tech.) ; Stefanek, G. (Jan Kochanowski U.) ; Stock, R. (Frankfurt U.) ; Strabel, C. (Frankfurt U.) ; Strobele, H. (Frankfurt U.) ; Susa, T. (Boskovic Inst., Zagreb) ; Szentpetery, I. (Budapest, RMKI) ; Sziklai, J. (Budapest, RMKI) ; Szuba, M. (Warsaw U. of Tech.) ; Szymanski, P. (CERN ; Warsaw, Inst. Nucl. Studies) ; Trubnikov, V. (Warsaw, Inst. Nucl. Studies) ; Varga, D. (Budapest, RMKI ; CERN) ; Vassiliou, M. (Athens U.) ; Veres, G.I. (Budapest, RMKI ; MIT) ; Vesztergombi, G. (Budapest, RMKI) ; Vranic, D. (Darmstadt, GSI) ; Wetzler, A. (Frankfurt U.) ; Wlodarczyk, Z. (Jan Kochanowski U.) ; Wojtaszek, A. (Jan Kochanowski U.) ; Yoo, I.K. (Pusan Natl. U.) ; Zimanyi, J. (Budapest, RMKI)
Affiliation	(NIKHEF, Amsterdam) ; (Athens U.) ; (Comenius U.) ; (Budapest, RMKI) ; (MIT) ; (Cracow, INP) ; (Darmstadt, GSI) ; (Dubna, JINR) ; (Frankfurt U.) ; (CERN) ; (Jan Kochanowski U.) ; (Marburg U.) ; (Munich, Max Planck Inst.) ; (Charles U.) ; (Pusan Natl. U.) ; (Washington U., Seattle) ; (Sofiya U.) ; (Sofiya, Inst. Nucl. Res.) ; (SUNY, Stony Brook, Chem. Dept.) ; (Institute for Nuclear Studies, Warsaw, Poland) ; (Warsaw, Inst. Nucl. Studies) ; (Warsaw U. of Tech.) ; (Boskovic Inst., Zagreb)
Publication	2008
Imprint	01 Oct 2007
Number of pages	22
Note	Comments: 22 pages, 23 figures 22 pages, 23 figures
In:	Phys. Rev. C 77 (2008) 064908
DOI	10.1103/PhysRevC.77.064908
Subject category	Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN SPS ; NA49
Abstract	Measurements of Bose--Einstein correlations of pion pairs in central Pb+Pb collisions were performed with the NA49 detector at the CERN SPS for beam energies of 20A, 30A, 40A, 80A, and 158A GeV. Correlation functions were measured in the longitudinally co-moving "out-side-long" refere nce frame as a function of rapidity and transverse momentum in the forward hemisphere of the reaction. Radius and correlation strength parameters were obtained from fits of a Gaussian parametrization. The results show a decrease of the radius parameters with increasing transverse momentum characteristic of strong radial flow in the pion source. No striking dependence on pion-pair rapidity or beam energy is observed. Static and dynamic properties of the pion source are obtained from simultaneous fits with a blast-wave model to radius parameters and midrapidity transverse momentum spectra. Predictions of hydrodynamic and microscopic models of Pb+Pb collisions are discussed.

$(Color online)~The NA49 experiment: beam position detectors BPD, target foil T, time of flight detectors TOF, time projection chambers TPC, and calorimeters CAL. Details can be found in \cite{Afanasev:1999iu}.$ $(Color online)~Raw yields of particle pairs at 20$A$ and 158$A$ GeV beam energy as a function of ${Y_{\pi\pi}}$ and ${k_{t}}$.$