PIXLRec pattern recognition

Introduction

PIXLRec is a pattern-recognition program operating in the ATLAS Inner Detector (Pixels+Strips+TRT). Emphasis is put on exploiting pixel fine granularity: the pattern-recognition starts from the pixel innermost layer and goes outwards. Thanks to routines provided by I.Gavrilenko, PIXLRec is now able to treat correctly multiple scattering in the fit procedure, and also can use TRT.
The aim is to test an alternate algorithm for track-finding, and thus get a more reliable understanding of the Inner Detector performances, especially in the b-tagging area.
However, PIXLRec is not a professional package, and no attempt was made to develop a high-performance program: this is particulary true concerning its speed. PIXLRec is mainly intended to perform precise tracking in small regions (e.g. one jet), and its use on a whole event is very slow.
PIXLRec is fully integrated in the New Dice-3 framework: it can thus perform full simulations, using detailled and up-to-date geometry and digitizations descriptions. It can be used interactively with Atlsim . PIXLRec is based on standard routines developped in ATRECON reconstruction package.
PIXLRec has been developped in the CPPM ATLAS Pixel group by AR and LV , following the pioneering work done by MTh with TrackNFit.