%0 Journal Article
%T A neural network clustering algorithm for the ATLAS silicon pixel detector
%A ATLAS Collaboration (Aad, G. et al
%A Cabrera Urban, S.
%A Castillo Gimenez, V.
%A Costa, M. J.
%A Ferrer, A.
%A Fiorini, L.
%A Fuster, J.
%A Garcia, C.
%A Garcia Navarro, J. E.
%A Gonzalez de la Hoz, S.
%A Hernandez Jimenez, Y.
%A Higon-Rodriguez, E.
%A Irles Quiles, A.
%A Kaci, M.
%A King, M.
%A Lacasta, C.
%A Lacuesta, V. R.
%A March, L.
%A Marti-Garcia, S.
%A Mitsou, V. A.
%A Moles-Valls, R.
%A Oliver Garcia, E.
%A Pedraza Lopez, S.
%A Perez Garcia-Estañ, M. T.
%A Romero Adam, E.
%A Ros, E.
%A Salt, J.
%A Sanchez Martinez, V.
%A Soldevila, U.
%A Sanchez, J.
%A Torro Pastor, E.
%A Valero, A.
%A Valladolid Gallego, E.
%A Valls Ferrer, J. A.
%A Vos, M.
%J Journal of Instrumentation
%D 2014
%V 9
%I Iop Publishing Ltd
%@ 1748-0221
%G English
%F ATLASCollaborationAad_etal2014
%O WOS:000343281300046
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1972), last updated on Thu, 13 Nov 2014 12:22:03 +0000
%X A novel technique to identify and split clusters created by multiple charged particles in the ATLAS pixel detector using a set of artificial neural networks is presented. Such merged clusters are a common feature of tracks originating from highly energetic objects, such as jets. Neural networks are trained using Monte Carlo samples produced with a detailed detector simulation. This technique replaces the former clustering approach based on a connected component analysis and charge interpolation. The performance of the neural network splitting technique is quantified using data from proton-proton collisions at the LHC collected by the ATLAS detector in 2011 and from Monte Carlo simulations. This technique reduces the number of clusters shared between tracks in highly energetic jets by up to a factor of three. It also provides more precise position and error estimates of the clusters in both the transverse and longitudinal impact parameter resolution.
%K Particle tracking detectors
%K Particle tracking detectors (Solid-state detectors)
%R 10.1088/1748-0221/9/09/P09009
%U http://arxiv.org/abs/arXiv:1406.7690
%U https://doi.org/10.1088/1748-0221/9/09/P09009
%P P09009 - 34pp