Event reconstruction in the BM@N experiment

S. Merts,O. Rogachevsky,A. Malakhov,V. Burov,P. Batyuk,S. Bondarenko,D. Baranov

doi:10.1051/epjconf/201920407012

Abstract

In the paper, the main accent is put on development of software to be used in the BM@N experiment. The experiment is considered as a first step towards a realization of fixed target program at the NICA complex. A brief description of software used for reconstruction of track parameters in the inner tracker of the experiment is presented. The alignment procedure in automatic mode was made using the Millepede package fully integrated in the software. The obtained results illustrate a quality assurance of alignment performed using existing experimental data from experimental runs and recent results, including methodological ones from a tracking procedure, which were used for event reconstruction in the inner tracker. The importance of a precise geometry description and a realistic detector response via micro-simulations done for the GEM part of the inner tracker used for processing experimental data is emphasized. Our recent progress in this activity is discussed.

Highlights

In the paper, the main accent is put on development of software to be used in the BM@N experiment
The GEM and silicon detectors form together the inner tracker system of the experiment. It consists of nine sensitive planes, in particular, three of them correspond to a silicon detector and the other six – to GEM
The reconstruction of spatial coordinates of points produced by a charge particle in a sensitive element of a detector serves as a necessary step towards finding tracks and estimation of their parameters

Summary

Experimental setup

BM@N (Baryonic matter at Nuclotron) [1] is considered as a first step towards realization of physics program at the NICA complex. It covers a fixed target program available at Nuclotron with extracted beams of different species. The GEM and silicon detectors form together the inner tracker system of the experiment. It consists of nine sensitive planes, in particular, three of them correspond to a silicon detector and the other six – to GEM

Reconstruction algorithm for the inner tracker

Realistic simulations

Tracking

Alignment