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000293097 1001_ $$0P:(DE-H253)PIP1023671$$aBagnaschi, Emanuele$$b0$$eCorresponding author$$udesy
000293097 245__ $$aAn extensive survey of the estimation of uncertainties from missing higher orders in perturbative calculations
000293097 260__ $$aBerlin$$bSpringer$$c2015
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000293097 520__ $$aWe consider two approaches to estimate and characterise the theoretical uncertainties stemming from the missing higher orders in perturbative calculations in Quantum Chromodynamics: the traditional one based on renormalisation and factorisation scale variation, and the Bayesian framework proposed by Cacciari and Houdeau. We estimate uncertainties with these two methods for a comprehensive set of more than thirty different observables computed in perturbative Quantum Chromodynamics, and we discuss their performance in properly estimating the size of the higher order terms that are known. We find that scale variation with the conventional choice of varying scales within a factor of two of a central scale gives uncertainty intervals that tend to be somewhat too small to be interpretable as 68% confidence-level-heuristic ones. We propose a modified version of the Bayesian approach of Cacciari and Houdeau which performs well for non-hadronic observables and, after an appropriate choice of the relevant expansion parameter for the perturbative series, for hadronic ones too.
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000293097 536__ $$0G:(EU-Grant)321133$$aHIGGS@LHC - Search and study of the Higgs bosons at the LHC (321133)$$c321133$$fERC-2012-ADG_20120216$$x2
000293097 536__ $$0G:(EU-Grant)264564$$aLHCPHENONET - Advanced Particle Phenomenology in the LHC era (264564)$$c264564$$fFP7-PEOPLE-2010-ITN$$x3
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000293097 7001_ $$aCacciari, Matteo$$b1
000293097 7001_ $$aGuffanti, Alberto$$b2
000293097 7001_ $$aJenniches, Laura$$b3
000293097 773__ $$0PERI:(DE-600)2027350-2$$a10.1007/JHEP02(2015)133$$gVol. 2015, no. 2, p. 133$$n2$$p133$$tJournal of high energy physics$$v2015$$x1029-8479$$y2015
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