Aspects of perturbative QCD at a 100 TeV future hadron collider

Bothmann, Enrico; Ferrarese, Piero; Krauss, Frank; Kuttimalai, Silvan; Schumann, Steffen; Thompson, J.

doi:10.1103/physrevd.94.034007

Cited by 24 publications

(15 citation statements)

References 215 publications

(295 reference statements)

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“…The contribution I 1 contains the conditions on x 1 , x 2 , θ 1 , θ 2 such that k 1 sets the mass (ρ = ρ 1 ) and has the higher transverse momentum, κ 1 > κ 2 . It also contains the condition for the Y-splitter cut 7 If we keep into account finite y corrections, we should actually use fcut = y/(1 + y), which is what we have done in practice in our Monte Carlo simulations. 8 Since we explained the approximations we have made in the previous section we shall no longer explicitly specify that the NLO corrections here are computed in the limit of soft and collinear emissions.…”

Section: Y-splitter With Trimming: Fixed-order Resultsmentioning

confidence: 99%

“…7 We firstly note that, at leading order, for a soft emission to pass Y-splitter it must have an energy fraction x > y. When one applies trimming afterwards such an emission is unaffected as, with our choice of f cut trimming removes only emissions with x < y.…”

Section: Y-splitter With Trimming: Fixed-order Resultsmentioning

confidence: 99%

“…[6] in the context of Higgs boson searches. Following this article there has been enormous interest in jet substructure methods and in exploiting the boosted particle regime at the LHC and even beyond, at potential future machines [7]. Several new jet substructure algorithms and techniques have been developed and validated in the past few years and are now commonly used in LHC searches and phenomenology [1][2][3].…”

Section: Jhep12(2016)079mentioning

confidence: 99%

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Improved jet substructure methods: Y-splitter and variants with grooming

Dasgupta

Powling

Schunk

et al. 2016

J. High Energ. Phys.

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It has recently been demonstrated with Monte Carlo studies that combining the well-known Y-splitter and trimming techniques gives rise to important gains in the signal significance achievable for boosted electroweak boson tagging at high p t . Here we carry out analytical calculations that explain these findings from first principles of QCD both for grooming via trimming and via the modified mass-drop tagger (mMDT). We also suggest modifications to Y-splitter itself, which result in great simplifications to the analytical results both for pure Y-splitter as well as its combination with general grooming methods. The modifications also lead to further performance gains, while making the results largely independent of choice of groomer. We discuss the implications of these findings in the broader context of optimal methods for boosted object studies at hadron colliders.

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Section: Y-splitter With Trimming: Fixed-order Resultsmentioning

confidence: 99%

Section: Y-splitter With Trimming: Fixed-order Resultsmentioning

confidence: 99%

Section: Jhep12(2016)079mentioning

confidence: 99%

See 1 more Smart Citation

Improved jet substructure methods: Y-splitter and variants with grooming

Dasgupta

Powling

Schunk

et al. 2016

J. High Energ. Phys.

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“…First, an analysis of dimension-six gluon operators in multijet production at a Future Circular Hadron Collider (FCC) with √ s = 100 TeV. Further details on this study can be found in [62,182]. Second, a study on an anomalous triple gauge coupling in Z-boson pair production at the LHC, based on the corresponding CMS measurement [183].…”

Section: Physics Beyond the Standard Modelmentioning

confidence: 99%

Event generation with Sherpa 2.2

et al. 2019

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SHERPA is a general-purpose Monte Carlo event generator for the simulation of particle collisions in high-energy collider experiments. We summarise essential features and improvements of the SHERPA 2.2 release series, which is heavily used for event generation in the analysis and interpretation of LHC Run 1 and Run 2 data. We highlight a decade of developments towards ever higher precision in the simulation of particle-collision events. Figure 1: Overview of the SHERPA 2.2 event generator framework. Interfaces/OutputsAMEGIC [6] and COMIX [7,8]. They are used for the simulation of parton-level events within the Standard Model and beyond, and for the decay of heavy resonances such as W , Z, or Higgs bosons or top quarks. Both include automated methods for efficient phase-space integration and algorithms for the subtraction of infrared divergences in calculations at next-to-leading order (NLO) in QCD [9, 10, 11] and the electroweak theory [12]. For the evaluation of virtual corrections at NLO accuracy SHERPA relies on interfaces to dedicated one-loop providers, e.g. BLACKHAT [13], OPENLOOPS [14] and RECOLA [15,16]. The default parton-showering algorithm of the SHERPA 2.2 series is the CSSHOWER [17], based on Catani-Seymour dipole factorisation [9,10,18]. As of version 2.2.0 SHERPA also features an independent second shower implementation, DIRE [19,20,21]. For the matching of NLO QCD matrix elements with parton showers SHERPA implements the MC@NLO method [22,23]. For NNLO QCD calculations the UN 2 LOPS method [24, 25] is used. The merging of multi-jet production processes at leading order [26,27,28] and next-to-leading order [29,30] is based on truncated parton showers. Multiple parton interactions are implemented via the Sjöstrand-van-Zijl model [31]. The hadronisation of partons into hadrons is modelled by a cluster fragmentation model [32]. Alternatively, in particular for uncertainty estimations, an interface to the Lund fragmentation model [33] of PYTHIA [34] is available. SHERPA provides a large library for the simulation of τ -lepton and hadron decays, including many form-factor models. Furthermore, a module for the simulation of QED final-state radiation in particle decays [35], which is accurate to first order in α for many channels is built-in. To account for spin correlations in production and subsequent decay processes the algorithm described in [36] is implemented. Events generated with SHERPA can be cast into various output formats for further processing, with the HEPMC [37] format being the most commonly used. In the specific case of parton-level events, at the leading and next-to-leading order in QCD, additional output formats are supported. They include Les Houches Event Files [38], NTUPLE files for NLO QCD events [39] and cross-section interpolation grids produced via MCGRID [40,41] in the APPLGRID [42] and FASTNLO [43,44] formats. To analyse events on-the-fly a runtime interface to the RIVET package [45] can be used conveniently.

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“…[105] (see also Refs. [106][107][108][109][110][111] for related theoretical work). Since the detector layout of a 100 TeV machine is likely to change towards an improved electromagnetic calorimeter coverage [112,113], this mapping from ðZ → e þ e − Þ þ jet and γ þ jet could also be performed without relying on an extrapolation into the jet-acceptance region beyond the lepton and photon acceptance regions jηj < 2.5 that is imposed by the current LHC setup.…”

Section: A 14 and 100 Tev Hadron Collidersmentioning

confidence: 99%

Towards resolving strongly-interacting dark sectors at colliders

2016

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Dark sectors with strong interactions have received considerable interest. Assuming the existence of a minimally coupled dark sector which runs to strong interactions in the infrared, we address the question whether the scaling behavior of this dark sector can be observed in missing energy signatures at present and future hadron colliders. We compare these findings to the concrete case of self-interacting dark matter and demonstrate that the energy dependence of high-momentum transfer final states can in principle be used to gain information about the UV structure of hidden sectors at future hadron colliders, subject to large improvements in systematic uncertainties, which could complement proof-of-principle lattice investigations. We also comment on the case of dark Abelian Uð1Þ theories.

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Aspects of perturbative QCD at a 100 TeV future hadron collider

Cited by 24 publications

References 215 publications

Improved jet substructure methods: Y-splitter and variants with grooming

Improved jet substructure methods: Y-splitter and variants with grooming

Event generation with Sherpa 2.2

Towards resolving strongly-interacting dark sectors at colliders

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