Monotop effective theory

Author

​Benjamin Fuks

• IPHC Strasbourg / University of Strasbourg
• fuks@…

Description of the model

This model is an extension of the SM, including additional interactions with additional fields so that monotop signatures at colliders are made possible. It follows the model constructed in the paper

​arXiv:1106.6199: J. Andrea, B. Fuks and F. Maltoni, Monotops at the LHC.

Model files

• monotops.fr: the main model file.
• This model requires the Standard Model implementation of FeynRules.
• MonoTops.nb: this is an example Mathematica notebook that loads the model, calculates the Feynman rules and extract the model files within the UFO format.

Matrix element generator files

Several coupling strength are set by hand to zero. We refer to ​arXiv:1106.6199 for more informatiom. Please note that due to unusual color structures appearing in this model, it only works with the limited set of matrix element generators shown below.

monotops_FA.tgz	The model files for FeynArts.
monotops_UFO.tgz	The model files in UFO format (e.g. for MadGraph 5).

LHC events and cross sections

The five benchmark scenarios are described in ​arXiv:1106.6199. For event generation, we use the following cuts, with jet being any (parton-level) light or b jet:

• deltaR(jet,jet) > 0.5
• eta(jet) < 2.5
• pt(jet) > 50 GeV

and consider hadronic monotop final state (three jets plus missing energy) at the LHC for a center-of-mass energy of 7 TeV. The corresponding cross section is given in the third column. In the fourth column, we provide total cross sections without including cuts and top decays.

Signal samples	Download	Cross section (including top decay and cuts) [pb]	Cross section (no top decay, no cut) [pb]
Scenario 1: 50.000 events	S1LHC.lhe.tgz	0.362	5.521
Scenario 2: 50.000 events	S2LHC.lhe.tgz	0.616	56.14
Scenario 3: 50.000 events	S3LHC.lhe.tgz	0.043	0.903
Scenario 4: 50.000 events	S4LHC.lhe.tgz	3.854	148.6
Scenario 5: 50.000 events	S5LHC.lhe.tgz	1.031e-06	???

Tevatron events and cross sections

The five benchmark scenarios are described in ​arXiv:1106.6199. For event generation, we use the following cuts, with jet being any (parton-level) light or b jet:

• deltaR(jet,jet) > 0.5
• eta(jet) < 2.5
• pt(jet) > 30 GeV

and consider hadronic monotop final state (three jets plus missing energy) at the Tevatron for a center-of-mass energy of 1.96 TeV. The corresponding cross section is given in the third column. In the fourth column, we provide total cross sections without including cuts and top decays.

Signal samples	Download	Cross section (including top decay and cuts) [pb]	Cross section (no top decay, no cut) [pb]
Scenario 1: 50.000 events	S1TeV.lhe.tgz	0.021	0.082
Scenario 2: 50.000 events	S2TeV.lhe.tgz	0.233	0.979
Scenario 3: 50.000 events	S3TeV.lhe.tgz	0.002	0.008
Scenario 4: 50.000 events	S4TeV.lhe.tgz	1.370	5.783
Scenario 5: 50.000 events	S5TeV.lhe.tgz	1.704e-08	???