Reconstruction of cosmic and beam-halo muons with the CMS detector |
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| Authors: | Chang Liu Norbert Neumeister Nicola Amapane Cristina Fernandez Bedoya Riccardo Bellan Philipp Biallass Sara Bolognesi Gianluca Cerminara Mary-Cruz Fouz Iglesias Marina Giunta Luigi Guiducci Kerstin Hoepfner Stefano Lacaprara Gianni Masetti Anna Meneguzzo Pierluigi Paolucci Jesus Puerta Pelayo Riccardo Travaglini Marco Zanetti Carlos Villanueva |
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| Institution: | (1) Department of Physics, Purdue University, West Lafayette, IN, USA;(2) Università di Torino e Sezione dell’INFN, Torino, Italy;(3) CIEMAT, Madrid, Spain;(4) CERN, Geneva, Switzerland;(5) Physics Institute III A, RWTH Aachen University, Aachen, Germany;(6) INFN and University of Bologna, Bologna, Italy;(7) INFN, Legnaro, Italy;(8) INFN and University of Padova, Padova, Italy;(9) INFN, Naples, Italy |
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| Abstract: | The powerful muon and tracker systems of the CMS detector together with dedicated reconstruction software allow precise and
efficient measurement of muon tracks originating from proton-proton collisions. The standard muon reconstruction algorithms,
however, are inadequate to deal with muons that do not originate from collisions. This note discusses the design, implementation,
and performance results of a dedicated cosmic muon track reconstruction algorithm, which features pattern recognition optimized
for muons that are not coming from the interaction point, i.e., cosmic muons and beam-halo muons. To evaluate the performance
of the new algorithm, data taken during Cosmic Challenge phases I and II were studied and compared with simulated cosmic data.
In addition, a variety of more general topologies of cosmic muons and beam-halo muons were studied using simulated data to
demonstrate some key features of the new algorithm. |
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