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Published in

SpringerOpen, The European Physical Journal C, 3(11), p. 383-407, 1999

DOI: 10.1007/s100529900190

Springer, The European Physical Journal C, 3(11), p. 383

DOI: 10.1007/s100520050643

Nuclear Instruments and Methods, 1-2(176), p. 409-413

DOI: 10.1016/0029-554x(80)90735-1

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Measurement and interpretation of fermion-pair production at LEP energies from 130 to 172 GeV

Journal article published in 1999 by Me E. Santo, P. Adzic, Z. Albrecht, T. Alderweireld, Gd D. Alekseev, R. Alemany, T. Allmendinger, Pp P. Allport, S. Almehed, U. Amaldi, S. Amato, Eg G. Anassontzis, P. Andersson, A. Andreazza, S. Andringa and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Data provided by SHERPA/RoMEO

Abstract

This paper presents the arguments which have led to the definition of the butterfly geometry adopted for the construction of the large drift chambers for the European hybrid spectrometer. The main characteristic of this geometry is the quasi-invariance of its 4-plane wire pattern under a change of perspective. As a consequence track impact reconstruction can be performed with acceptable ambiguity rates even in presence of high track multiplicities with large angels of incidence.Its expected performance is compared with the performance of the well known y-u-ν-y-staggered geometry in a given context of application.