CERN Accelerating science

Article
Report number	arXiv:1510.00568
Title	A new version of the event generator Sibyll
Author(s)	Riehn, Felix (KIT, Karlsruhe) ; Engel, Ralph (KIT, Karlsruhe) ; Fedynitch, Anatoli (KIT, Karlsruhe ; CERN) ; Gaisser, Thomas K. (Delaware U., Bartol Inst.) ; Stanev, Todor (Delaware U., Bartol Inst.)
Publication	2016
Imprint	02 Oct 2015
Number of pages	8
Note	Comments: Contribution to ICRC 2015 Contribution to ICRC 2015
In:	PoS ICRC2015 (2016) 558
In:	34th International Cosmic Ray Conference, The Hague, The Netherlands, 30 Jul - 6 Aug 2015, pp.558
DOI	10.22323/1.236.0558
Subject category	Particle Physics - Phenomenology
Abstract	The event generator Sibyll can be used for the simulation of hadronic multiparticle production up to the highest cosmic ray energies. It is optimized for providing an economic description of those aspects of the expected hadronic final states that are needed for the calculation of air showers and atmospheric lepton fluxes. New measurements from fixed target and collider experiments, in particular those at LHC, allow us to test the predictive power of the model version 2.1, which was released more than 10 years ago, and also to identify shortcomings. Based on a detailed comparison of the model predictions with the new data we revisit model assumptions and approximations to obtain an improved version of the interaction model. In addition a phenomenological model for the production of charm particles is implemented as needed for the calculation of prompt lepton fluxes in the energy range of the astrophysical neutrinos recently discovered by IceCube. After giving an overview of the new ideas implemented in Sibyll and discussing how they lead to an improved description of accelerator data, predictions for air showers and atmospheric lepton fluxes are presented.
Copyright/License	arXiv nonexclusive-distrib. 1.0

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