MINLO: multi-scale improved NLO

By K. Hamilton, P. Nason, G. Zanderighi. 2012

385 citations recorded by the source corpus.

A bstractIn the present work we consider the assignment of the factorization and renormalization scales in hadron collider processes with associated jet production, at next-to-leading order (NLO) in perturbation theory. We propose a simple, definite prescription to this end, including Sudakov form factors to consistently account for the distinct kinematic scales occuring in such collisions. The scheme yields results that are accurate at NLO and, for a large class of observables, it resums to all orders the large logarithms that arise from kinematic configurations involving disparate scales. In practical terms the method is most simply understood as an NLO extension of the matrix element reweighting procedure employed in tree level matrix element-parton shower merging algorithms. By way of a proof-of-concept, we apply the method to Higgs and Z boson production in association with up to two jets.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/269e8fd62ddc35093c86540ece487dd7a994a860

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In Nuclear and High Energy Physics

Citations in the corpus

Study of double parton scattering using W + 2-jet events in proton-proton collisions at $ \sqrt{s} $ = 7 TeV (2013, methodology): “• POWHEG 2 + PYTHIA 6 (HERWIG 6): W + 2-jet events are also produced up to NLO accuracy with the POWHEG 2 event generator with the “Multi-scale improved NLO” (MiNLO) method [41].”
NLO QCD matrix elements + parton showers in e+e− → hadrons (2012, background): “This can be achieved if we define the renormalisation scale for a process of O(αn s ) as [24] αs(μ 2 R) n = n ∏”
Les Houches 2015: Physics at TeV Colliders Standard Model Working Group Report (2016, methodology): “Parton shower matched N2LOQCD computations using both the MiNLO method [153], SCET resummation [88] and via the UN2LOPS technique [154].”
Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, methodology): “For the present work, t he HJJ generator has been augmented with the MiNLO method [286, 287].”
Search for invisible decays of a Higgs boson produced through vector boson fusion in proton-proton collisions at $\sqrt{s} =$ 13 TeV (2018, methodology): “[34] and is found to be about 30%, while the latter uncertainty is estimated by comparing the prediction from POWHEG+MINLO [67] with the one from MADGRAPH5 aMC@NLO and ranges between 20 and 25%.”
String formation beyond leading colour (2015, methodology): “ones based on QCD dipoles [13–19]), and better techniques for how to combine them (matching and merging, see [3,12,20–22] and references therein).”
Finite quark-mass effects in the NNLOPS POWHEG+MiNLO Higgs generator (2015, methodology): “MiNLO [42] is in essence and extension of the well-known CKKW procedure [43] at the NLO level.”
Combining higher-order resummation with multiple NLO calculations and parton showers in GENEVA (2012, background): “[38]) can mitigate this to some extent but does not solve the problem.”
HW±/HZ + 0 and 1 jet at NLO with the POWHEG BOX interfaced to GoSam and their merging within MiNLO (2013, methodology): “In our HV + 1 jet generators, we apply the improved version of the MiNLO procedure [21] discussed in ref.”
Soft triple-real radiation for Higgs production at N3LO (2013, neutral): “[15–35] See, for example, refs.”
Collider physics at the precision frontier (2020, methodology): “The combination of fixed-order QCD computations with parton showers has been studied at NLO+PS in association with up to one jet [204] and at NNLOPS [205, 206, 133] using the MiNLO procedure in Powheg [207].”
Merging H/W/Z + 0 and 1 jet at NLO with no merging scale: a path to parton shower + NNLO matching (2012, methodology): “Now we will assume, at variance with [14] (for reasons that will become clear later), that the renormalization scale for the power of αS accompanying V , R and ∆ (1) g is qT.”
Evidence for the 125 GeV Higgs boson decaying to a pair of τ leptons (2014, methodology): “The rate and acceptance uncertainties in the gg → H process in the VBF-tagged categories are estimated by comparing the four different MC generators POWHEG, MADGRAPH, POWHEG interfaced with MINLO [82], and aMC@NLO [83].”
Les Houches 2013: Physics at TeV Colliders: Standard Model Working Group Report (2014, methodology): “The renormalisation and factorisation scales, μR and μF , are set following the MiNLO procedure [32].”