Supersymmetry and generic BSM models in Pythia 8

Desai, Nishita

doi:10.1140/epjc/s10052-012-2238-0

Cited by 27 publications

(23 citation statements)

References 34 publications

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“…in Pythia8.2 and Herwig (see refs. [229][230][231]), the sparticle widths are sufficiently large to avoid hadronisation before decay -in other words, no R-hadrons will be present in our simulations.…”

Section: A Case Study: Jets Plus Missing Energy At the Nlo+ps Accuracymentioning

confidence: 99%

Automated simulations beyond the Standard Model: supersymmetry

Frixione

Fuks

Hirschi

et al. 2019

J. High Energ. Phys.

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The MadGraph5 aMC@NLO framework aims to automate all types of leading-and next-to-leading-order-accurate simulations for any user-defined model that stems from a renormalisable Lagrangian. In this paper, we present all of the key ingredients of such models in the context of supersymmetric theories. In order to do so, we extend the FeynRules package by giving it the possibility of dealing with different renormalisation options that are relevant to supersymmetric models. We also show how to deal with the problem posed by the presence of narrow resonances, thus generalising the so-called on-shell subtraction approaches. We extensively compare our total rate results with those of both Prospino2 and Resummino, and present illustrative applications relevant to the 13 TeV LHC, both at the total-rate and differential levels. The computer programs that we have used to obtain the predictions presented here are all publicly available. arXiv:1907.04898v1 [hep-ph] 10 Jul 2019 7 Conclusions 47 A Conventions for one-point and two-point functions 49 B The MoGRe package 50 B.1 The main method MoGRe$Renormalize and its options 50 B.2 Simplifying the procedure 51 B.3 Restrictions 52 B.4 Specifying the renormalisation scheme 52 B.5 Clearing a renormalisation scheme 52 B.6 Technical details on the functioning of the method 53 C Decoupling of heavy SUSY particles in MG5 aMC 55 -1 -which allows for the cancellation of chiral anomalies and to generate masses for all up-type and down-type particles.

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Section: A Case Study: Jets Plus Missing Energy At the Nlo+ps Accuracymentioning

confidence: 99%

Automated simulations beyond the Standard Model: supersymmetry

Frixione

Fuks

Hirschi

et al. 2019

J. High Energ. Phys.

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“…Systematic uncertainties on the signal acceptance from QCD radiation are not considered. The reason for this choice is that there is no SM process that contains a colour flow similar to the signal in this analysis due to the presence of colour-epsilon tensors involved in the RPV vertex [75]. As a consequence, the theoretical understanding of the QCD radiation is less developed than for most other processes, and no clear prescription is available for determining the associated uncertainties.…”

mentioning

confidence: 99%

Search for pair production of massive particles decaying into three quarks with the ATLAS detector in $ \sqrt{s}=7\;\mathrm{TeV} $ pp collisions at the LHC

Aad

Abajyan

Abbott

et al. 2012

J. High Energ. Phys.

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A search is conducted for hadronic three-body decays of a new massive coloured particle in $ \sqrt{s}=7\;\mathrm{TeV} $ pp collisions at the LHC using an integrated luminosity of 4.6 fb−1 collected by the ATLAS detector. Supersymmetric gluino pair production in the context of a model with R-parity violation is used as a benchmark scenario. The analysis is divided into two search channels, each optimised separately for their sensitivity to high-mass and low-mass gluino production. The first search channel uses a stringent selection on the transverse momentum of the six leading jets and is performed as a counting experiment. The second search channel focuses on low-mass gluinos produced with a large boost. Large-radius jets are selected and the invariant mass of each of the two leading jets is used as a discriminant between the signal and the background. The results are found to be consistent with Standard Model expectations and limits are set on the allowed gluino mass.

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“…Using the model files we generated events for the pair production of VLQs (in LHEF format [72]) at the LHC with √ s = 13 TeV and the subsequent decays of the xd 1 and s h were included as a decay table for the model (in SLHA format [73,74]) with the help of CalcHEP. We then use these files to decay the unstable particles, and pass the generated parton-level events for showering and hadronization in PYTHIA 8.2 [75].…”

Section: And Y Slmentioning

confidence: 99%

New signals for vector-like down-type quark in U(1) of $$E_6$$

Das

Nandi

et al. 2018

Eur. Phys. J. C

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We consider the pair production of vector-like down-type quarks in an E 6 motivated model, where each of the produced down-type vector-like quark decays into an ordinary Standard Model light quark and a singlet scalar. Both the vector-like quark and the singlet scalar appear naturally in the E 6 model with masses at the TeV scale with a favorable choice of symmetry breaking pattern. We focus on the non-standard decay of the vector-like quark and the new scalar which decays to two photons or two gluons. We analyze the signal for the vector-like quark production in the 2γ + ≥ 2 j channel and show how the scalar and vectorlike quark masses can be determined at the Large Hadron Collider.

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Supersymmetry and generic BSM models in Pythia 8

Cited by 27 publications

References 34 publications

Automated simulations beyond the Standard Model: supersymmetry

Automated simulations beyond the Standard Model: supersymmetry

Search for pair production of massive particles decaying into three quarks with the ATLAS detector in $ \sqrt{s}=7\;\mathrm{TeV} $ pp collisions at the LHC

New signals for vector-like down-type quark in U(1) of $$E_6$$

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