Testing Hadronic Interaction Models using a Highly Granular   Silicon-Tungsten Calorimeter

The CALICE Collaboration: B. Bilki (1)(32); J. Repond (1); J.; Schlereth (1); L. Xia (1); Z. Deng (2); Y. Li (2); Y. Wang (2); Q. Yue (2),; Z. Yang (2); G. Eigen (3); Y. Mikami (4); T. Price (4); N. K. Watson (4); M.; A. Thomson (5); D. R. Ward (5); D. Benchekroun (6); A. Hoummada (6); Y.; Khoulaki (6); C. C\^arloganu (7); S. Chang (8); A. Khan (8); D. H. Kim (8),; D. J. Kong (8); Y. D. Oh (8); G. C. Blazey (9); A. Dyshkant (9); K. Francis; (9); J. G. R. Lima (9); P. Salcido (9); V. Zutshi (9); V. Boisvert (10); B.; Green (10); A. Misiejuk (10); F. Salvatore (10)(33); K. Kawagoe (11); Y.; Miyazaki (11); Y. Sudo (11); T. Suehara (11); T. Tomita (11); H. Ueno (11),; T. Yoshioka (11); J. Apostolakis (12); G. Folger (12); G. Folger (12); V.; Ivantchenko (12); A. Ribon (12); V. Uzhinskiy (12); S. Cauwenbergh (13); M.; Tytgat (13); N. Zaganidis (13); J. -Y. Hostachy (14); L. Morin (14); K. Gadow; (15); P. G\"ottlicher (15); C. G\"unter (15); K. Kr\"uger (15); B. Lutz (15),; M. Reinecke (15); F. Sefkow (15); N. Feege (16)(34); E. Garutti (16); S.; Laurien (16); S. Lu (16); I. Marchesini (16)(9); M. Matysek (16); M. Ramilli; (16); A. Kaplan (17); E. Norbeck (18); D. Northacker (18); Y. Onel (18); E.; J. Kim (19); B. van Doren (20); G. W. Wilson (20); M. Wing (21)(15)(16); B.; Bobchenko (22)(23); M. Chadeeva (22)(23); R. Chistov (22); M. Danilov; (22)(23)(35); A. Drutskoy (22)(23); A. Epifantsev (22); O. Markin (22); R.; Mizuk (22)(23); E.Novikov (22); V.Popov (22); V. Rusinov (22)(23); E.; Tarkovsky (22)(23); D. Besson (23); E. Popova (23); M. Gabriel (24); C.; Kiesling (24); F. Simon (24); C. Soldner (24); M. Szalay (24); M. Tesar (24),; L. Weuste (24); M. S. Amjad (25)(36); J. Bonis (25); S. Callier (25); S.; Conforti di Lorenzo (25); P. Cornebise (25); Ph. Doublet (25) (37); F. Dulucq; (25); M. Faucci-Giannelli (25)(38); J. Fleury (25); T. Frisson (25); B.; K\'egl (25); N. van der Kolk (25)(39)(41); H. Li (25)(40); G. Martin-Chassard; (25); F. Richard (25); Ch. de la Taille (25); R. P\"oschl (25); L. Raux (25),; J. Rou\"en\'e (25); N. Seguin-Moreau (25); M. Anduze (26); V. Balagura (26),; E. Becheva (26); V. Boudry (26); J-C. Brient (26); R. Cornat (26); M. Frotin; (26); F. Gastaldi (26); F. Magniette (26); A. Matthieu (26); P. Mora de; Freitas (26); H. Videau (26); J-E. Augustin (27); J. David (27); P. Ghislain; (27); D. Lacour (27); L. Lavergne (27); J. Zacek (28); J. Cvach (29); P.; Gallus (29); M. Havranek (29); M. Janata (29); J. Kvasnicka (29); D. Lednicky; (29); M. Marcisovsky (29); I. Polak (29); J. Popule (29); L. Tomasek (29); M.; Tomasek (29); P. Ruzicka (29); P. Sicho (29); J. Smolik (29); V. Vrba (29),; J. Zalesak (29); D. Jeans (30); M. G\"otze (31) ( (1) Argonne National; Laboratory; Argonne; USA; (2) Tsinghua University; Beijing; P.R. China; (3); University of Bergen; Bergen; Norway; (4) University of Birmingham,; Birmingham; UK; (5) University of Cambridge; Cambridge; UK; (6) Universit\'e; Hassan II A\"in Chock; Facult\'e des sciences; Casablanca; Morocco; (7); Clermont Universit\'e; Universit\'e Blaise Pascal; Clermont-Ferrand; France,; (8) Department of Physics; Kyungpook National University; Daegu; Republic of; Korea; (9) NICADD; Northern Illinois University; Department of Physics,; DeKalb; USA; (10) Royal Holloway University of London; Dept. of Physics,; Egham; UK; (11) Department of Physics; Kyushu University; Fukuoka; Japan (12); CERN; Gen\`eve; Switzerland (13) Ghent University; Department of Physics and; Astronomy; Gent; Belgium; (14) Laboratoire de Physique Subatomique et de; Cosmologie - Universit\'e Grenoble-Alpes; Grenoble; France; (15) DESY,; Hamburg; Germany; (16) Univ. Hamburg; Physics Department; Institut f\"ur; Experimentalphysik; Hamburg; Germany; (17) University of Heidelberg,; Fakult\"at f\"ur Physik und Astronomie; Heidelberg; Germany; (18) University; of Iowa; Dept. of Physics; Astronomy; Iowa City; USA; (19) Chonbuk; National University; Jeonju; South Korea; (20) University of Kansas,; Department of Physics; Astronomy; Lawrence; USA; (21) Department of; Physics; Astronomy; University College London; London; UK (22) Institute; of Theoretical; Experimental Physics; Moscow; Russia; (23) MEPhI; Moscow,; Russia; (24) Max Planck Inst. f\"ur Physik; Munich; Germany; (25) Laboratoire; de l'Acc\'el\'erateur Lin\'eaire (LAL); Orsay; France; (26) Laboratoire; Leprince-Ringuet (LLR); Palaiseau; France; (27) Laboratoire de Physique; Nucl\'eaire et de Hautes Energies (LPNHE); Paris; France; (28) Charles; University; Institute of Particle \& Nuclear Physics; Prague; Czech Republic,; (29) Institute of Physics; Academy of Sciences of the Czech Republic; Prague,; Czech Republic; (30) Department of Physics; Graduate School of Science; The; University of Tokyo; Tokyo; Japan (31) Bergische Universit\"at Wuppertal,; Wuppertal; Germany; (32) Also at University of Iowa; (33) Now at University; of Sussex; (34) Now at Stony Brook University; (35) Also at Moscow Institute; of Physics; Technology; (36) Now at COMSATS Institute of Information; Technology; (37) Now at IUT d'Orsay (38) Now at Royal Holloway University of; London (39) Also at LLR; through excellence cluster P2IO. Now at Max Planck; Inst. f\"ur Physik; (40) Now at University of Virginia; (41) Corresponding; author)

arXiv:1411.7215·physics.ins-det·June 29, 2015

Testing Hadronic Interaction Models using a Highly Granular Silicon-Tungsten Calorimeter

The CALICE Collaboration: B. Bilki (1)(32), J. Repond (1), J., Schlereth (1), L. Xia (1), Z. Deng (2), Y. Li (2), Y. Wang (2), Q. Yue (2),, Z. Yang (2), G. Eigen (3), Y. Mikami (4), T. Price (4), N. K. Watson (4), M., A. Thomson (5), D. R. Ward (5), D. Benchekroun (6)

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TL;DR

This study evaluates the accuracy of various hadronic interaction models in Geant4 by comparing their predictions to detailed measurements from a highly granular silicon-tungsten calorimeter using 2-10 GeV pion data.

Contribution

It provides a comprehensive comparison of Geant4 physics models against high-resolution calorimeter data, highlighting areas of agreement and discrepancy.

Findings

01

Monte Carlo predictions are within 20% of experimental data.

02

Most observables are modeled more accurately than previous studies.

03

Significant discrepancies are found in energy distribution profiles.

Abstract

A detailed study of hadronic interactions is presented using data recorded with the highly granular CALICE silicon-tungsten electromagnetic calorimeter. Approximately 350,000 selected negatively charged pion events at energies between 2 and 10 GeV have been studied. The predictions of several physics models available within the Geant4 simulation tool kit are compared to this data. A reasonable overall description of the data is observed; the Monte Carlo predictions are within 20% of the data, and for many observables much closer. The largest quantitative discrepancies are found in the longitudinal and transverse distributions of reconstructed energy.

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