Proton-Λ correlations in central Pb+Pb collisions at sqrt[s\_\NN\]=17.3 GeV

NA49 Collaboration , T. Anticic , B. Baatar , D. Barna , J. Bartke , H. Beck , L. Betev , Helena Białkowska , C. Blume , M. Bogusz , B. Boimska , J. Book , M. Botje , P. Bunčić , T. Cetner , P. Christakoglou , P. Chung , O. Chvála , J. G. Cramer , V. Eckardt , Z. Fodor , P. Foka , V. Friese , M. Gaździcki , Katarzyna Grebieszkow , C. Höhne , K. Kadija , A. Karev , V. I. Kolesnikov , M Kowalski , D. Kresan , A. László , R. Lacey , M. Leeuwen , M. Maćkowiak , M. Makariev , A. I. Malakhov , M. Mateev , G. L. Melkumov , M. Mitrovski , St. Mrówczyński , V. Nicolic , G. Pálla , A. D. Panagiotou , Wiktor Peryt , Jan Pluta , D. Prindle , F. Pühlhofer , R. Renfordt , C. Roland , G. Roland , Marek Rybczyński , A. Rybicki , A. Sandoval , N. Schmitz , T. Schuster , P. Seyboth , F. Siklér , E. Skrzypczak , M. Słodkowski , G. Stefanek , R. Stock , H. Ströbele , T. Susa , M Szuba , M. Utvić , D. Varga , M. Vassiliou , G. I. Veres , G. Vesztergombi , D. Vranić , Z. Włodarczyk , A. Wojtaszek-Szwarc

Abstract

The momentum correlation between protons and Λ particles emitted from central Pb+Pb collisions at √sNN=17.3 GeV was studied by the NA49 experiment at the CERN Super Proton Synchrotron. A clear enhancement is observed for small relative momenta (qinv\\textless\0.2 GeV). By fitting a theoretical model, which uses the strong interaction between the proton and the Λ in a given pair, to the measured data, a value for the effective source size is deduced. Assuming a static Gaussian source distribution, we derive an effective radius parameter of RG=3.02±0.20(stat.)-0.16+0.44(syst.) fm.
Author NA49 Collaboration
NA49 Collaboration,,
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, T. Anticic - [Institute Ruder Boskovic]
T. Anticic,,
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, B. Baatar - [Joint Institute for Nuclear Research, Dubna]
B. Baatar,,
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, D. Barna - [Research Institute for Particle and Nuclear Physics Hungarian Academy of Sciences]
D. Barna,,
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, J. Bartke - [Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences]
J. Bartke,,
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, H. Beck - [Goethe-Universitat Frankfurt am Main]
H. Beck,,
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, L. Betev - [European Organization for Nuclear Research (CERN)]
L. Betev,,
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- European Organization for Nuclear Research
, Helena Białkowska - [Institute of Nuclear Chemistry and Technology, Warsaw]
Helena Białkowska,,
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, C. Blume - [Goethe-Universitat Frankfurt am Main]
C. Blume,,
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, M. Bogusz - [Politechnika Warszawska]
M. Bogusz,,
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et al.`
Journal seriesPhysical Review C, ISSN 0556-2813
Issue year2011
Vol83
No5
Pages054906
ASJC Classification3106 Nuclear and High Energy Physics
DOIDOI:10.1103/PhysRevC.83.054906
URL http://link.aps.org/doi/10.1103/PhysRevC.83.054906
Score (nominal)40
Score sourcejournalList
Publication indicators Scopus Citations = 9; WoS Impact Factor: 2011 = 3.308 (2) - 2011=3.068 (5)
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