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2015:groups:higgs:dmhiggs:eftdm [2015/07/06 12:08] andreas.goudelis |
2015:groups:higgs:dmhiggs:eftdm [2015/08/11 11:52] (current) michele.frigerio |
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**Members:** Benjamin Fuks, Nishita Desai, Giacomo Polesello, Sanjoy Biswas, Suchita Kulkarni, Dipan Sengupta, Björn Herrmann, Daniel Schmeier, Daniele Barducci, Michele Frigerio, Aoife Bharucha, Genevieve Belanger | **Members:** Benjamin Fuks, Nishita Desai, Giacomo Polesello, Sanjoy Biswas, Suchita Kulkarni, Dipan Sengupta, Björn Herrmann, Daniel Schmeier, Daniele Barducci, Michele Frigerio, Aoife Bharucha, Genevieve Belanger | ||
- | ** Main idea ** | + | ** Main idea: ** |
- | * Would an observed excess of j+MET events allow for a distinction of the underlying model? Most likely candidate we could think of during our discussions: derivative couplings arising, e.g., in composite Higgs models. | + | Would an observed excess of j+MET events allow for a distinction of the underlying model? Can the monojet pT distribution differentiate among different SM-DM couplings? An enhancement of the signal for large pT occurs if the coupling is proportional to the exchanged momentum; this happens for a derivative coupling, typically encountered, e.g., in compositeness models. |
+ | |||
+ | ** Simplest example: ** | ||
+ | The SM plus one singlet scalar DM, including a dim-6 operator coupling the Higgs doublet to the DM. | ||
+ | A recent reference on this model: http://inspirehep.net/record/1341060?ln=en , see section 3.1.1, in particular eq.(3.3) for the Higgs-DM-DM coupling, if somebody is interested to generate the related pT distribution... | ||
+ | |||
+ | A preliminary study of the monojet signature in this model was performed in the master thesis by Sylvain Lacroix (2013, in French): see section 3.9 for the case without derivative coupling, and section 4.3 for the addition of the derivative operator. | ||
+ | |||
+ | Notes by M.Frigerio including motivations, the simplest model, and two non-minimal models are available here: {{:2015:groups:higgs:dmhiggs:monojetpt.pdf|}} | ||
**Useful references** | **Useful references** | ||
- | * A simple comparison of Monojet qqXX vs Dijet qqqq and Dilepton qqll limits on purely effective contact interactions | ||
- | http://arxiv.org/abs/1303.3348 | ||
- | * An EFT "cutting" method in order to obtain consistent constraints in EFT frameworks: | + | * Composite Dark Matter and LHC Interplay |
- | http://arxiv.org/abs/1502.04701 | + | http://arxiv.org/abs/1404.7419 |
+ | |||
+ | * Dark Matter Constraints on Composite Higgs Models | ||
+ | http://arxiv.org/abs/1501.05957 | ||
* A rather inclusive summary on signatures of various EFT DM models | * A rather inclusive summary on signatures of various EFT DM models | ||
http://arxiv.org/abs/1506.03116 | http://arxiv.org/abs/1506.03116 | ||
+ | |||
+ | * The ATLAS/CMS Dark Matter forum summary | ||
+ | http://arxiv.org/abs/1507.00966 | ||
+ | |||
+ | * A relevant MSc thesis from a student of Michele's (in French) | ||
+ | {{:2015:groups:higgs:dmhiggs:rapport.pdf|}} | ||
**Tools** | **Tools** | ||
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https://feynrules.irmp.ucl.ac.be/wiki/DMsimp | https://feynrules.irmp.ucl.ac.be/wiki/DMsimp | ||
- | ==== Effect of derivative couplings on dark matter collider searches ==== | + | * FeynRules (with corresponding CalcHEP and UFO) model files for the singlet model, with an effective g-g-h vertex implemented for h production |
- | + | {{:2015:groups:higgs:dmhiggs:compositedmleshouches.tar|}} | |
- | Can the monojet pT distribution differentiate among different SM-DM couplings? | + | |
- | An enhancement of the signal for large pT occurs if the coupling is proportional to the exchanged momentum; this happens for a derivative coupling. | + | |
- | + | ||
- | == Simplest example: == | + | |
- | The SM plus one singlet scalar DM, including a dim-6 operator coupling the Higgs doublet to the DM. | + | |
- | A recent reference on this model: http://inspirehep.net/record/1341060?ln=en , see section 3.1.1, in particular eq.(3.3) for the Higgs-DM-DM coupling, if somebody is interested to generate the related pT distribution... | + | |
- | + | ||
- | A preliminary study of the monojet signature in this model was performed in the master thesis by Sylvain Lacroix (2013, in French): see section 3.9 for the case without derivative coupling, and section 4.3 for the addition of the derivative operator. | + | |
+ | **Micromegas results** | ||
+ | {{:2015:groups:higgs:dmhiggs:scdm-micro.tar.gz|}} | ||