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ISSN - 01709739, Zeitschrift f�r Physik C-Particles and Fields, 1995, vol. 69, p. 215-222

Bose-Einstein correlations in e+e- annihilation in the Y(1S) and continuum

Blinov A. E., Blinov V. E., Bondar A. E., Bukin A. D., Groshev V. R., Klimenko S. G., Onuchin A. P., Panin V. S., Protopopov I. Ya, Shamov A. G., Sidorov V. A., Skovpen Yu I., Skrinsky A. N., Tayursky V. A., Telnov V. I., Tikhonov Yu A., Tumaikin G. M., Undrus A. E., Vorobiov A. I., Zhilich V. N.

Bose-Einstein correlations in direct Y(1S) decays and continuum in the energy region √s = 7.2 - 10.3 GeV have been studied using data taken with the MD-1 detector at VEPP-4 storage ring. Assuming gaussian density of the pion source the data indicate the radius of the source unknown sign = 0.73 ± 0.10 ± 0.04 fm for direct Y(1S) decays and unknown sign = 0.83 ± 0.22 ± 0.05 fm for the continuum. The correlation strengths λ for both data samples also are similar. Thus Bose-Einstein correlations do not reveal a noticeable difference between quark and gluon fragmentation. © Springer-Verlag 1996.