Tuesday, September 11, 2012

1209.1747 (Yu. M. Sinyukov et al.)

Correlation femtoscopy of small systems    [PDF]

Yu. M. Sinyukov, V. M. Shapoval
The basic principles of the correlation femtoscopy, including its correspondence to the Hanbury Brown and Twiss intensity interferometry, are re-examined. The main subject of the paper is an analysis of the correlation femtoscopy of small systems with typical sizes about 1 fm. The uncertainty principle plays an important role for correlation femtoscopy of such systems. It is taken into account by the use of the formalism of partially coherent phases in the amplitudes of individual emitters. The general analysis is illustrated analytically for the case of the Gaussian approximation for emitting sources. The reduction of the interferometry radii and suppression of the Bose-Einstein correlation functions for small sources due to the uncertainty principle are found. There is the positive correlation between the source size and the intercept of the correlation function. The peculiarities of the non-femtoscopic correlations caused by minijets and fluctuations of the initial states of the systems formed in pp and e+e- collisions are analyzed also. The factorization property for the contributions of femtoscopic and non-femtoscopic correlations into complete correlation function is found.
View original: http://arxiv.org/abs/1209.1747

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