FIZIKA B 11 (2002)  3, 141-148

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INTERMITTENCY AND TARGET FRAGMENTS IN MUON-NUCLEUS INTERACTIONS AT (42045) 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 (42045) 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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