FIZIKA B 11 (2002)  3, 141-148

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INTERMITTENCY AND TARGET FRAGMENTS IN MUON-NUCLEUS INTERACTIONS AT (420±45) GeV

DIPAK GHOSH, ARGHA DEB, SYED IMTIAZ AHMED and
PARTHASARATHI GHOSH

Nuclear and Particle Physics Research Centre, Department of Physics,
Jadavpur University, Kolkata -700032, India

Received 30 January 2002; Accepted 16 December 2002
Online 7 February 2003

This paper presents an analysis of angular distribution of target fragments in lepton nucleus interactions in terms of scaled factorial moments (SFMs) in one-dimensional space. A power-law type behaviour of normalised scaled factorial moments, popularly known as 'intermittency', is expressed with a decreasing phase space. Our data of target fragments reveal a similar type of increase in SFMs with decreasing bin width of the angular distribution in muon-nucleus interactions at (420±45) GeV. The new observation contradicts the existing concept of the evaporation model that the statistical equilibrium is reached before the emission of fragmented particles from residual target nuclei at high-energy nuclear interactions.

PACS numbers: 25.30.-c
UDC 539.126

Keywords: lepton-nucleus interactions, target fragments, angular distribution, intermittency, scaled factorial moments

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