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A study of Bose-Einstein correlations ine + e annihilation at 91 GeV

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Zeitschrift für Physik C Particles and Fields

Abstract

This paper describes a study of Bose-Einstein correlations made using the ALEPH detector at LEP. The correlations are found to enhance the two particle differential cross section for pairs of identical pions by a factor which can be roughly parametrized byR(Q)=1+λ exp(-Q2σ2), whereQ is the difference in the 3-momenta of the two pions in their centre of mass frame, λ=0.51±0.04±0.11 and σ=3.3±0.2±0.8 GeV−1, which corresponds to a source size of 0.65±0.04±0.16 fm. The large systematic errors on these results reflect their strong dependence on the choice of the reference sample used in the analysis. This problem is believed to occur primarily because of uncertainties in the rates of resonance production and a lack of knowledge about the pion-pion strong interaction. No significant correlations are seen amongst like-charged pion-kaon pairs.

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Supported by CAICYT, Spain

Supported by the National Science Foundation of China

Supported by the Danish Natural Science Research Council

Supported by the UK Science and Engineering Research Council

Supported by the US Department of Energy, contract DE-AC02-76 ER 00881

Supported by the US Department of Energy, contract DE-FG05-87ER 40319

Supported by the NSF, contract PHY-8451274

Supported by the US Department of Energy, contract DE-FC0S-85ER 250000

Supported by SLOAN fellowship, contract BR 2703

Supported by the Bundesministerium für Forschung und Technologie, FRG

Supported by the Institut de Recherche Fondamentale du C.E.A.

Supported by Fonds zur Fördering der wissenschatlichen Forschung, Austria

Supported by the Korean Science and Engineering Foundation and Ministry of Education

Supported by the World Laboratory

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ALEPH Collaboration., Decamp, D., Deschizeaux, B. et al. A study of Bose-Einstein correlations ine + e annihilation at 91 GeV. Z. Phys. C - Particles and Fields 54, 75–85 (1992). https://doi.org/10.1007/BF01881709

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  • DOI: https://doi.org/10.1007/BF01881709

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