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Tracking within Hadronic Showers in the CALICE SDHCAL prototype using a Hough Transform Technique
Z. Deng1, Y. Li1, Y. Wang1, Q. Yue1, Z. Yang1, D. Boumediene2, C. Carloganu2, V. Français2, G. Cho3, D-W. Kim3, S. C. Lee3, Z. Liu3, W. Park3, S. Vallecorsa3, S. Cauwenbergh4, M. Tytgat4, A. Pingault4, N. Zaganidis4, O. Bach5, E. Brianne5, A. Ebrahimi5, K. Gadow5, P. Göttlicher5, O. Hartbrich5, A. Irles5, K. Kotera5, F. Krivan5, K. Krüger5, S. Lu5, C. Neubüser5, A. Provenza5, M. Reinecke5, F. Sefkow5, S. Schuwalow5, Y. Sudo5, H.L. Tran5, H. Hirai6, K. Kawagoe6, T. Suehara6, H. Sumida6, T. Yoshioka6, E. Cortina Gil7, S. Mannai7, V. Buridon8, C. Combaret8, L. Caponetto8, R. Eté8, G. Garillot8, G. Grenier8, R. Han8, J.C. Ianigro8, R. Kieffer8, T. Kurca8, I. Laktineh8, B. Li8, N. Lumb8, H. Mathez8, L. Mirabito8, A. Petrukhin8, A. Steen8, J. Berenguer Antequera9, E. Calvo Alamillo9, M.-C. Fouz9, J. Marin9, J. Navarrete9, J. Puerta-Pelayo9, A. Verdugo9, F. Corriveau10, M. Chadeeva11, M. Gabriel12, P. Goecke12, C. Graf12, Y. Israeli12, N. van der Kolk12, F. Simon12, M. Szalay12, H. Windel12, S. Bilokin13, J. Bonis13, R. Pöschl13, A. Thiebault13, F. Richard13, D. Zerwas13, M. Anduze14, V. Balagura14, E. Becheva14, V. Boudry14, J-C. Brient14, R. Cornat14, F. Gastaldi14, Y. Haddad14, F. Magniette14, J. Nanni14, M. Ruan14, M. Rubio-Roy14, K. Shpak14, T.H. Tran14, H. Videau14, D. Yu14, S. Callier15, F. Dulucq15, Ch. de la Taille15, G. Martin-Chassard15, L. Raux15, N. Seguin-Moreau15, J. Cvach16, M. Janata16, M. Kovalcuk16, J. Kvasnicka16, I. Polak16, J. Smolik16, V. Vrba16, J. Zalesak16 and J. Zuklin16
3 Gangneung-Wonju National University, Gangnung 25457, South Korea
4 Ghent University, Department of Physics and Astronomy, Proeftuinstraat 86, B-9000 Gent, Belgium
5 DESY, Notkestrasse 85, D-22603 Hamburg, Germany
6 Department of Physics and Research Center for Advanced Particle Physics, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
7 Center for Cosmology, Particle Physics and Cosmology (CP3), Université catholique de Louvain, Chemin du cyclotron 2, 1320 Louvain-la-Neuve, Belgium
8 Univ. Lyon, Université Lyon 1, CNRS/IN2P3, IPNL 4 rue E Fermi 69622, Villeurbanne CEDEX, France
9 CIEMAT, Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, Madrid, Spain
10 Department of Physics, McGill University, Ernest Rutherford Physics Bldg., 3600 University Ave., Montréal, Québec H3A 2T8, Canada
11 P. N. Lebedev Physical Institute, Russian Academy of Sciences, 117924 GSP-1 Moscow, B-333, Russia
12 Max-Planck-Institut für Physik, Föhringer Ring 6, D-80805 Munich, Germany
13 Laboratoire de l'Accélerateur Linéaire, CNRS/IN2P3 et Université de Paris-Sud XI, Centre Scientifique d'Orsay Bâtiment 200, BP 34, F-91898 Orsay CEDEX, France
14 Laboratoire Leprince-Ringuet (LLR)—École Polytechnique, CNRS/IN2P3, Palaiseau, F-91128 France
15 Laboratoire OMEGA—École Polytechnique, CNRS/IN2P3, Palaiseau, F-91128 France
16 Institute of Physics, The Czech Academy of Sciences, Na Slovance 2, CZ-18221 Prague 8, Czech Republic
The high granularity of the CALICE Semi-Digital Hadronic CALorimeter (SDHCAL) provides the capability to reveal the track segments present in hadronic showers. These segments are then used as a tool to probe the behaviour of the active layers in situ, to better reconstruct the energy of these hadronic showers and also to distinguish them from electromagnetic ones. In addition, the comparison of these track segments in data and the simulation helps to discriminate among the different shower models used in the simulation. To extract the track segments in the showers recorded in the SDHCAL, a Hough Transform is used after being adapted to the presence of the dense core of the hadronic showers and the SDHCAL active medium structure.
