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. 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.

Signal samples	Download	Cross section (including top decay) [pb]
Scenario 1: 200.000 events	S1LHC.lhe.tgz	0.362
Scenario 2: 200.000 events	S2LHC.lhe.tgz	0.616
Scenario 3: 200.000 events	S3LHC.lhe.tgz	0.043
Scenario 4: 200.000 events	S4LHC.lhe.tgz	3.854
Scenario 5: 200.000 events	S5LHC.lhe.tgz	1.031e-06

Background samples	Download	Cross section [pb]
1. Z(invisible) + 3 light jets: 1.000.000 events	zjjjLHC.lhe.tgz
2. Z(invisible) + 2 light jets + 1 c-jet: 1.000.000 events	zjjcLHC.lhe.tgz
3. Z(invisible) + 2 light jets + 1 b-jet: 1.000.000 events	zjjbLHC.lhe.tgz
4. Z(invisible) + 1 light jets + 2 b-jet: 1.000.000 events	zjbbLHC.lhe.tgz
5. Z(invisible) + 1 light jets + 1 b-jet + 1 c-jet: 1.000.000 events	zjbcLHC.lhe.tgz
6. Z(invisible) + 1 light jets + 2 c-jet: 1.000.000 events	zjccLHC.lhe.tgz
7. Z(invisible) + 3 c-jet: 1.000.000 events	zcccLHC.lhe.tgz
8. Z(invisible) + 2 c-jet + 1 b-jet: 1.000.000 events	zbccLHC.lhe.tgz
9. Z(invisible) + 2 b-jet + 1 c-jet: 1.000.000 events	zbbcLHC.lhe.tgz
10. Z(invisible) + 3 b-jet: 1.000.000 events	zbbbLHC.lhe.tgz

Tevatron events and cross sections

The five benchmark scenarios are described in ​arXiv:1106.6199. 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.

Signal samples	Download	Cross section' [fb]
Scenario 1: 200.000 events	S1TeV.lhe.tgz	21.2
Scenario 2: 200.000 events	S2TeV.lhe.tgz
Scenario 3: 200.000 events	S3TeV.lhe.tgz
Scenario 4: 200.000 events	S4TeV.lhe.tgz
Scenario 5: 200.000 events	S5TeV.lhe.tgz

Background samples	Download	Cross section
1. Z(invisible) + 3 light jets: 1.000.000 events	zjjjTeV.lhe.tgz
2. Z(invisible) + 2 light jets + 1 c-jet: 1.000.000 events	zjjcTeV.lhe.tgz
3. Z(invisible) + 2 light jets + 1 b-jet: 1.000.000 events	zjjbTeV.lhe.tgz
4. Z(invisible) + 1 light jets + 2 b-jet: 1.000.000 events	zjbbTeV.lhe.tgz
5. Z(invisible) + 1 light jets + 1 b-jet + 1 c-jet: 1.000.000 events	zjbcTeV.lhe.tgz
6. Z(invisible) + 1 light jets + 2 c-jet: 1.000.000 events	zjccTeV.lhe.tgz
7. Z(invisible) + 3 c-jet: 1.000.000 events	zcccTeV.lhe.tgz
8. Z(invisible) + 2 c-jet + 1 b-jet: 1.000.000 events	zbccTeV.lhe.tgz
9. Z(invisible) + 2 b-jet + 1 c-jet: 1.000.000 events	zbbcTeV.lhe.tgz
10. Z(invisible) + 3 b-jet: 1.000.000 events	zbbbTeV.lhe.tgz