ReDecay: a novel approach to speed up the simulation at LHCb

Abstract With the steady increase in the precision of flavour physics measurements collected during LHC Run 2, the LHCb experiment requires simulated data samples of larger and larger sizes to study the detector response in detail. The simulation of the detector response is the main contribution to...

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Main Authors: D. Müller, M. Clemencic, G. Corti, M. Gersabeck
Format: Article
Language:English
Published: SpringerOpen 2018-12-01
Series:European Physical Journal C: Particles and Fields
Online Access:http://link.springer.com/article/10.1140/epjc/s10052-018-6469-6
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author D. Müller
M. Clemencic
G. Corti
M. Gersabeck
author_facet D. Müller
M. Clemencic
G. Corti
M. Gersabeck
author_sort D. Müller
collection DOAJ
description Abstract With the steady increase in the precision of flavour physics measurements collected during LHC Run 2, the LHCb experiment requires simulated data samples of larger and larger sizes to study the detector response in detail. The simulation of the detector response is the main contribution to the time needed to simulate full events. This time scales linearly with the particle multiplicity. Of the dozens of particles present in the simulation only the few participating in the signal decay under study are of interest, while all remaining particles mainly affect the resolutions and efficiencies of the detector. This paper presents a novel development for the LHCb simulation software which re-uses the rest of the event from previously simulated events. This approach achieves an order of magnitude increase in speed and the same quality compared to the nominal simulation.
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spelling doaj.art-ea1cf3dbdcb540f7af7dd7fbdc60fcd52022-12-21T17:26:52ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522018-12-0178121510.1140/epjc/s10052-018-6469-6ReDecay: a novel approach to speed up the simulation at LHCbD. Müller0M. Clemencic1G. Corti2M. Gersabeck3European Organization for Nuclear Research (CERN)European Organization for Nuclear Research (CERN)European Organization for Nuclear Research (CERN)School of Physics and Astronomy, University of ManchesterAbstract With the steady increase in the precision of flavour physics measurements collected during LHC Run 2, the LHCb experiment requires simulated data samples of larger and larger sizes to study the detector response in detail. The simulation of the detector response is the main contribution to the time needed to simulate full events. This time scales linearly with the particle multiplicity. Of the dozens of particles present in the simulation only the few participating in the signal decay under study are of interest, while all remaining particles mainly affect the resolutions and efficiencies of the detector. This paper presents a novel development for the LHCb simulation software which re-uses the rest of the event from previously simulated events. This approach achieves an order of magnitude increase in speed and the same quality compared to the nominal simulation.http://link.springer.com/article/10.1140/epjc/s10052-018-6469-6
spellingShingle D. Müller
M. Clemencic
G. Corti
M. Gersabeck
ReDecay: a novel approach to speed up the simulation at LHCb
European Physical Journal C: Particles and Fields
title ReDecay: a novel approach to speed up the simulation at LHCb
title_full ReDecay: a novel approach to speed up the simulation at LHCb
title_fullStr ReDecay: a novel approach to speed up the simulation at LHCb
title_full_unstemmed ReDecay: a novel approach to speed up the simulation at LHCb
title_short ReDecay: a novel approach to speed up the simulation at LHCb
title_sort redecay a novel approach to speed up the simulation at lhcb
url http://link.springer.com/article/10.1140/epjc/s10052-018-6469-6
work_keys_str_mv AT dmuller redecayanovelapproachtospeedupthesimulationatlhcb
AT mclemencic redecayanovelapproachtospeedupthesimulationatlhcb
AT gcorti redecayanovelapproachtospeedupthesimulationatlhcb
AT mgersabeck redecayanovelapproachtospeedupthesimulationatlhcb