Challenges in Monte Carlo Event Generator Software for High-Luminosity LHC

@article{Valassi2021ChallengesIM,
  title={Challenges in Monte Carlo Event Generator Software for High-Luminosity LHC},
  author={The Hsf Physics Event Generator WG Andrea Valassi and Efe Yazgan and J. A. Mcfayden and Simone Amoroso and Joshua Lorne Bendavid and Andy Buckley and Matteo Cacciari and Taylor Childers and Vitaliano Ciulli and R. Frederix and Stefano Frixione and Francesco Giuli and Alexander Grohsjean and Christian A. Gutschow and Stefan Hoche and Walter Hopkins and Dmitri Konstantinov and Frank Krauss and Qiang Li and Leif Lonnblad and Fabio Maltoni and Michelangelo M. Mangano and Zach Marshall and Olivier Mattelaer and J Fernandez Menendez and Stephen Mrenna and Servesh Muralidharan and Tobias Neumann and Simon Platzer and Stefan Prestel and Stefan Roiser and Marek Schonherr and Holger Schulz and Markus W. Schulz and Elizabeth Sexton-Kennedy and Frank Siegert and Andrzej Si'odmok and Graeme Andrew Stewart},
  journal={Computing and Software for Big Science},
  year={2021},
  volume={5},
  pages={1-19}
}
We review the main software and computing challenges for the Monte Carlo physics event generators used by the LHC experiments, in view of the High-Luminosity LHC (HL-LHC) physics programme. This paper has been prepared by the HEP Software Foundation (HSF) Physics Event Generator Working Group as an input to the LHCC review of HL-LHC computing, which has started in May 2020. 
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1Argonne National Laboratory, Lemont, IL, 60439 2Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA 3Department of Physics and Astronomy, University of Pittsburgh,
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References

SHOWING 1-10 OF 263 REFERENCES
Simulation of vector boson plus many jet final states at the high luminosity LHC
We present a novel event generation framework for the efficient simulation of vector boson plus multi-jet backgrounds at the high-luminosity LHC and at possible future hadron colliders. MPI
Systematic event generator tuning for the LHC
In this article we describe Professor, a new program for tuning model parameters of Monte Carlo event generators to experimental data by parameterising the per-bin generator response to parameter
The LHCb detector at the LHC
The LHCb experiment is dedicated to precision measurements of CP violation and rare decays of B hadrons at the Large Hadron Collider (LHC) at CERN (Geneva). The initial configuration and expected
Event generation with Sherpa 2.2
TLDR
This work summarises 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.
On the maximal use of Monte Carlo samples: re-weighting events at NLO accuracy
  • O. Mattelaer
  • Physics
    The European physical journal. C, Particles and fields
  • 2016
TLDR
A method that allows to consistently re-use parton-level samples accurate up to NLO in QCD under different theoretical hypotheses is described and its validation is shown by applying it to several cases of practical interest for the search of new physics at the LHC.
Monte Carlo event generators for high energy particle physics event simulation
Monte Carlo event generators (MCEGs) are the indispensable workhorses of particle physics, bridging the gap between theoretical ideas and first-principles calculations on the one hand, and the
QCD Radiation in the Production of Heavy Colored Particles at the LHC
We present a study of the effects of QCD radiation in the production of heavy colored states, employing inclusive multi-jet samples obtained by matching matrix elements and parton showers. We discuss
The ALICE experiment at the CERN LHC
ALICE (A Large Ion Collider Experiment) is a general-purpose, heavy-ion detector at the CERN LHC which focuses on QCD, the strong-interaction sector of the Standard Model. It is designed to address
...
...