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Prog. Theor. Phys. Vol. 111 No. 1 (2004) pp. 93-103

[ Full Text PDF : FREE ACCESS (247K) ]

Transverse Momentum Dependence of Hanbury Brown-Twiss Radii of Pions from a Perfectly Opaque Source with Hydrodynamic Flow

Kenji Morita1,* and Shin Muroya2,**

1Department of Physics, Waseda University, Tokyo 169-8555, Japan
2Tokuyama Women's College, Shunan 745-8511, Japan

(Received August 26, 2003)

Abstract:

We investigate the transverse momentum dependence of pion HBT radii on the basis of a hydrodynamical model. Recent experimental data show that Rout/Rside < 1, which suggests a strong opaqueness of the source. In addition to the opaqueness naturally caused by transverse flow, we introduce an extrinsic opacity by imposing restrictions on the pion emission angle. Comparing the HBT radii obtained from the normal Cooper-Frye prescription and the opaque emission prescription, we find that Rout/Rside is less than unity only for small values of the transverse momentum with an opaque source. However, HBT radii for large values of the transverse momentum are dominated by the transverse flow effect and are affected less by the source opaqueness.


URL : http://ptp.ipap.jp/link?PTP/111/93/
DOI : 10.1143/PTP.111.93


*E-mail: morita@hep.phys.waseda.ac.jp
**E-mail: muroya@yukawa.kyoto-u.ac.jp

[ Full Text PDF : FREE ACCESS (247K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 116 No. 2 (2006) pp. 329-347 :
    Multiplicity Dependence of Partially Coherent Pion Production in Relativistic Heavy Ion Collisions
    Kenji Morita, Shin Muroya and Hiroki Nakamura

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