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Title: Central Pb+Pb collisions at 158 A GeV/c studied by $$\pi^-\pi^-$$ interferometry

Abstract

Two-particle correlations have been measured for identified $$\pi^-$$ from central 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the radii as a function of k T is presented, including a full correction for the resolution effects of the apparatus. The cross term R 2 out-long of the standard fit in the Longitudinally CoMoving System (LCMS) and the v L parameter of the generalised Yano-Koonin fit are compatible with o, suggesting that the source undergoes a boost invariant expansion. The shapes of the correlation functions in Q inv and Q space = √Q$$2\atop{x}$$ + Q$$2\atop{y}$$ + Q$$2\atop{z}$$ have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence fitting Gaussians to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for the measurement.

Authors:
 [1]
  1. Univ. of Panjab, Chandigarh (India). et al.
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
The WA98 Collaboration
OSTI Identifier:
1410301
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 16; Journal Issue: 3; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Aggarwal et al., M. M. Central Pb+Pb collisions at 158 A GeV/c studied by $\pi^-\pi^-$ interferometry. United States: N. p., 2000. Web. doi:10.1007/s100520000413.
Aggarwal et al., M. M. Central Pb+Pb collisions at 158 A GeV/c studied by $\pi^-\pi^-$ interferometry. United States. doi:10.1007/s100520000413.
Aggarwal et al., M. M. Thu . "Central Pb+Pb collisions at 158 A GeV/c studied by $\pi^-\pi^-$ interferometry". United States. doi:10.1007/s100520000413. https://www.osti.gov/servlets/purl/1410301.
@article{osti_1410301,
title = {Central Pb+Pb collisions at 158 A GeV/c studied by $\pi^-\pi^-$ interferometry},
author = {Aggarwal et al., M. M.},
abstractNote = {Two-particle correlations have been measured for identified $\pi^-$ from central 158 A GeV Pb+Pb collisions and fitted radii of about 7 fm in all dimensions have been obtained. A multi-dimensional study of the radii as a function of kT is presented, including a full correction for the resolution effects of the apparatus. The cross term R2out-long of the standard fit in the Longitudinally CoMoving System (LCMS) and the vL parameter of the generalised Yano-Koonin fit are compatible with o, suggesting that the source undergoes a boost invariant expansion. The shapes of the correlation functions in Qinv and Qspace = √Q$2\atop{x}$ + Q$2\atop{y}$ + Q$2\atop{z}$ have been analyzed in detail. They are not Gaussian but better represented by exponentials. As a consequence fitting Gaussians to these correlation functions may produce different radii depending on the acceptance of the experimental setup used for the measurement.},
doi = {10.1007/s100520000413},
journal = {European Physical Journal. C, Particles and Fields},
number = 3,
volume = 16,
place = {United States},
year = {2000},
month = {5}
}

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Cited by: 21 works
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