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The emergence of multi-lepton anomalies at the LHC and their compatibility with new physics at the EW scale · Around 2019
The emergence of multi-lepton anomalies at the LHC and their compatibility with new physics at the EW scale von Buddenbrock, Stefan, Cornell, Alan S., Fang, Yaquan et al.
Understand A recent study [1] has shown that a simplified model predicting a heavy scalar of mass 270 GeV ($H$) that decays to a Standard Model (SM) Higgs boson in association with a scalar singlet of mass 150 GeV ($S$) can accommodate several anomalous multi-lepton results in proton-proton collisions at the Large Hadron Collider (LHC).
With this in mind, the goal of this article is to provide a more formal study of a wider set of LHC results pertaining to the production of multiple leptons. We find that a combination of such results lead to strong discrepancies between the data and SM Monte Carlo predictions. These discrepancies appear in corners of the phase-space where different SM processes dominate, indicating that the potential mismodeling of a single SM process is unlikely to explain them.
Built on A. Behring, M. Czakon, A. Mitov, A. S. Papanastasiou, and R. Poncelet, Higher order corrections to spin correlations in top quark pair production at the LHC
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1901
Earlier work this paper cites.
T. Becher and M. Hager, Event-Based Transverse Momentum Resummation
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1904
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M. Grazzini, Soft-gluon effects in WW production at hadron colliders
2006
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S. Frixione, P. Nason, and G. Ridolfi, A Positive-weight next-to-leading-order Monte Carlo for heavy flavour hadroproduction
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2007
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S. Frixione, E. Laenen, P. Motylinski, B. R. Webber, and C. D. White, Single-top hadroproduction in association with a W boson
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2008
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R. Frederix and M. Grazzini, Higher-order QCD effects in the h —> ZZ search channel at the LHC
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2008
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S. Alioli, P. Nason, C. Oleari, and E. Re, A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
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2010
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E. Re, Single-top Wt-channel production matched with parton showers using the POWHEG method
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2011
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M. Cacciari, G. P. Salam, and G. Soyez, FastJet User Manual
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2012
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K. Cranmer, G. Lewis, L. Moneta, A. Shibata, and W. Verkerke, HistFactory: A tool for creating statistical models for use with RooFit and RooStats
2012
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M. Farina, C. Grojean, F. Maltoni, E. Salvioni, and A. Thamm, Lifting degeneracies in Higgs couplings using single top production in association with a Higgs boson
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2013
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Y. Wang, C. S. Li, Z. L. Liu, D. Y. Shao, and H. T. Li, Transverse-Momentum Resummation for Gauge Boson Pair Production at the Hadron Collider
Original
2013
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Similar J. Alwall, R. Frederix, S. Frixione, V. Hirschi, F. Maltoni, O. Mattelaer, H. S. Shao, T. Stelzer, P. Torrielli, and M. Zaro, The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
Original
2014
Cited alongside, same era.
DELPHES 3
Original
2014
Cited alongside, same era.
T. Gehrmann, M. Grazzini, S. Kallweit, P. Maierhöfer, A. von Manteuffel, S. Pozzorini, D. Rathlev, and L. Tancredi, W + W − W^{+}W^{-} Production at Hadron Colliders in Next to Next to Leading Order QCD
Original
2014
Cited alongside, same era.
T. Sjostrand, S. Ask, J. R. Christiansen, R. Corke, N. Desai, P. Ilten, S. Mrenna, S. Prestel, C. O. Rasmussen, and P. Z. Skands, An Introduction to PYTHIA 8.2
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2015
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Then F. Caola, K. Melnikov, R. Röntsch, and L. Tancredi, QCD corrections to W + W − W^{+}W^{-} production through gluon fusion
Original
2016
Later among the works it cites.
B. Biedermann, M. Billoni, A. Denner, S. Dittmaier, L. Hofer, B. Jäger, and L. Salfelder, Next-to-leading-order electroweak corrections to p p → W + W − → pp\to W^{+}W^{-}\to 4 leptons at the LHC
Original
2016
Later among the works it cites.
T. Jezo, J. M. Lindert, P. Nason, C. Oleari, and S. Pozzorini, An NLO+PS generator for t t ¯ t\bar{t} and W t Wt production and decay including non-resonant and interference effects
Original
2016
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M. Grazzini, S. Kallweit, D. Rathlev, and M. Wiesemann, W ± Z W^{\pm}Z production at hadron colliders in NNLO QCD
Original
2016
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L. A. Harland-Lang, A. D. Martin, P. Motylinski, and R. S. Thorne, Parton distributions in the LHC era: MMHT 2014 PDFs
Cited alongside, same era.
S. von Buddenbrock, N. Chakrabarty, A. S. Cornell, D. Kar, M. Kumar, T. Mandal, B. Mellado, B. Mukhopadhyaya, R. G. Reed, and X. Ruan, Phenomenological signatures of additional scalar bosons at the LHC
Original
2016
Cited alongside, same era.
869 pages, 295 figures, 248 tables and 1645 citations. Working Group web page: https://twiki.cern.ch/twiki/bin/view/LHCPhysics/LHCHXSWG
LHC Higgs Cross Section Working Group · 2016
Cited alongside, same era.
S. Dulat, T.-J. Hou, J. Gao, M. Guzzi, J. Huston, P. Nadolsky, J. Pumplin, C. Schmidt, D. Stump, and C. P. Yuan, New parton distribution functions from a global analysis of quantum chromodynamics
Original
2016
Cited alongside, same era.
D. Dercks, N. Desai, J. S. Kim, K. Rolbiecki, J. Tattersall, and T. Weber, CheckMATE 2: From the model to the limit
Later among the works it cites.
Figure 35
CMS · 2018
Later among the works it cites.
A. S. Cornell, M. Kumar, B. Mellado, and X. Ruan In preparation, 2019
2019
Closest in time.