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Journal article
High statistics measurement of the underground muon pair separation at Gran Sasso
Physical review. D, v 60(3), pp 1-13
01 Aug 1999
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Abstract
We present a measurement of the underground decoherence function using multi-muon events observed in the MACRO detector at Gran Sasso at an average depth of 3800 hg/cm(2). Muon pair separations up to 70 m have been measured, corresponding to parent mesons with P-perpendicular to less than or equal to 1-2 GeV/c. Improved selection criteria are used to reduce detector effects mainly in the low distance separation region of muon pairs. Special care is given to a new unfolding procedure designed to minimize systematic errors in the numerical algorithm. The accuracy of the measurement is such that the possible contribution of rare processes, such as mu (+/-) + N --> mu (+/-) + N mu (+) + mu (-), can be experimentally studied. The measured decoherence function is compared with the predictions of the hadronic interaction model of the HEMAS Monte Carlo code. Good agreement is obtained. We interpret this agreement to indicate that no anomalous P-perpendicular to components in soft hadron-nucleus and nucleus-nucleus collisions are required by the MACRO experimental data. Preliminary comparisons with other Monte Carlo codes point out that the uncertainties associated with the hadronic interaction model may be as large as 20%, depending on the energy. MACRO data can be used as a benchmark for future work on the discrimination of shower models in the primary energy region around and below the knee of the spectrum. [50556-2821(99)03011-8].
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Details
- Title
- High statistics measurement of the underground muon pair separation at Gran Sasso
- Creators
- M Ambrosio - University of Bari Aldo MoroR Antolini - University of Bari Aldo MoroC Aramo - University of Bari Aldo MoroG Auriemma - University of Bari Aldo MoroA Baldini - University of Bari Aldo MoroG C Barbarino - University of Bari Aldo MoroB C Barish - University of Bari Aldo MoroG Battistoni - University of Bari Aldo MoroR Bellotti - University of Bari Aldo MoroC Bemporad - University of Bari Aldo MoroE Bernardini - University of Bari Aldo MoroP Bernardini - University of Bari Aldo MoroH Bilokon - University of Bari Aldo MoroBisiC Bloise - University of Bari Aldo MoroC Bower - University of Bari Aldo MoroS Bussino - University of Bari Aldo MoroF Cafagna - University of Bari Aldo MoroM Calicchio - University of Bari Aldo MoroD Campana - University of Bari Aldo MoroM Carboni - University of Bari Aldo MoroM Castellano - University of Bari Aldo MoroS Cecchini - University of Bari Aldo MoroF Cei - University of Bari Aldo MoroChiarellaB C Choudhary - University of Bari Aldo MoroS CoutuG De Cataldo - University of Bari Aldo MoroH Dekhissi - University of Bari Aldo MoroC De Marzo - University of Bari Aldo MoroDe MitriJ Derkaoui - University of Bari Aldo MoroM De Vincenzi - University of Bari Aldo MoroA Di Credico - University of Bari Aldo MoroO Erriquez - University of Bari Aldo MoroC Favuzzi - University of Bari Aldo MoroC Forti - University of Bari Aldo MoroP Fusco - University of Bari Aldo MoroG Giacomelli - University of Bari Aldo MoroG Giannini - University of Bari Aldo MoroN Giglietto - University of Bari Aldo MoroM Giorgini - University of Bari Aldo MoroM Grassi - University of Bari Aldo MoroL Gray - University of Bari Aldo MoroA Grillo - University of Bari Aldo MoroF Guarino - University of Bari Aldo MoroC Gustavino - University of Bari Aldo MoroA Habig - University of Bari Aldo MoroK Hanson - University of Bari Aldo MoroR Heinz - University of Bari Aldo MoroY Huang - University of Bari Aldo MoroE Iarocci - University of Bari Aldo MoroE Katsavounidis - University of Bari Aldo MoroKatsavounidisE Kearns - University of Bari Aldo MoroH Kim - University of Bari Aldo MoroS Kyriazopoulou - University of Bari Aldo MoroE Lamanna - University of Bari Aldo MoroC Lane - University of Bari Aldo MoroT Lari - University of Bari Aldo MoroD S Levin - University of Bari Aldo MoroP Lipari - University of Bari Aldo MoroN P Longley - University of Bari Aldo MoroM J Longo - University of Bari Aldo MoroF Loparco - University of Bari Aldo MoroF Maaroufi - University of Bari Aldo MoroG Mancarella - University of Bari Aldo MoroG Mandrioli - University of Bari Aldo MoroS Manzoor - University of Bari Aldo MoroA MargiottaA Marini - University of Bari Aldo MoroD Martello - University of Bari Aldo MoroA Marzari-Chiesa - University of Bari Aldo MoroM N Mazziotta - University of Bari Aldo MoroC Mazzotta - University of Bari Aldo MoroD G Michael - University of Bari Aldo MoroS Mikheyev - University of Bari Aldo MoroL Miller - University of Bari Aldo MoroP Monacelli - University of Bari Aldo MoroT Montaruli - University of Bari Aldo MoroM Monteno - University of Bari Aldo MoroS Mufson - University of Bari Aldo MoroJ Musser - University of Bari Aldo MoroD Nicolo - University of Bari Aldo MoroC Orth - University of Bari Aldo MoroG Osteria - University of Bari Aldo MoroM Ouchrif - University of Bari Aldo MoroO Palamara - University of Bari Aldo MoroPateraL Patrizii - University of Bari Aldo MoroR Pazzi - University of Bari Aldo MoroC W Peck - University of Bari Aldo MoroS Petrera - University of Bari Aldo MoroP Pistilli - University of Bari Aldo MoroPopaA Raino - University of Bari Aldo MoroA Rastelli - University of Bari Aldo MoroJ Reynoldson - University of Bari Aldo MoroF Ronga - University of Bari Aldo MoroU Rubizzo - University of Bari Aldo MoroC Satriano - University of Bari Aldo MoroL Satta - University of Bari Aldo MoroE Scapparone - University of Bari Aldo MoroK Scholberg - University of Bari Aldo MoroA Sciubba - University of Bari Aldo MoroP Serra-Lugaresi - University of Bari Aldo MoroM Severi - University of Bari Aldo MoroM Sioli - University of Bari Aldo MoroM Sitta - University of Bari Aldo MoroP Spinelli - University of Bari Aldo MoroM Spinetti - University of Bari Aldo MoroM Spurio - University of Bari Aldo MoroR Steinberg - University of Bari Aldo MoroJ L Stone - University of Bari Aldo MoroL R Sulak - University of Bari Aldo MoroA Surdo - University of Bari Aldo MoroG Tarle - University of Bari Aldo MoroTogoD Ugolotti - University of Bari Aldo MoroM Vakili - University of Bari Aldo MoroC W Walter - University of Bari Aldo MoroR Webb - University of Bari Aldo MoroMACRO Collaboration
- Publication Details
- Physical review. D, v 60(3), pp 1-13
- Publisher
- Amer Physical Soc
- Number of pages
- 13
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000081836300006
- Scopus ID
- 2-s2.0-16444385699
- Other Identifier
- 991019297056104721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics
- Physics, Particles & Fields