Version 12 (modified by YoavAfik, 8 days ago) (diff) |
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4-fermion EFT with FCNC implementation
Authors:
- Yoav Afik (yoavafik@…)
- Jonathan Cohen (jcohen@…)
- Eitan Gozani
- Enrique Kajomovitz
- Yoram Rozen
Department of Physics, Technion: Israel Institute of Technology Haifa, Israel
Description of the model:
This is a Contact Interaction model with b-s-l-l FCNC terms. The lagrangian of the model is described by:
Only the off-diagonal elements for the b-s admixtures are considered, since those are the ones related to the observed b-s-l-l anomalies. The matrices take the form:
The presumed scale and coupling of the new physics, is estimated by defining:
- Please note that the model is normalized according to Λ = 1TeV and g^{*} = 1. For example, if you want to set Λ = 2TeV and g^{*} = 1 for electrons coupling to b-s quarks, just set Celbs in the param_card to be 0.25.
- A more simple model is also attached, contains only the b-s-l-l non-diagonal terms for simplicity.
Model Files:
- bsll_5FS_full.zip : the full model.
- bsll_5FS_non-diagonal.zip : only the non-diagonal terms.
Commands for MadGraph5_aMC@NLO:
define p = g u c d s b u~ c~ d~ s~ b~ define j = g u c d s b u~ c~ d~ s~ b~ generate p p > mu+ mu- add process p p > mu+ mu- j add process p p > mu+ mu- j j
References:
[1] Afik, Y., Cohen, J., Gozani, E. et al. J. High Energ. Phys. (2018) 2018: 56.
- Link to paper: https://link.springer.com/article/10.1007/JHEP08(2018)056
Attachments (2)
- bsll_5FS_full.zip (44.9 KB) - added by YoavAfik 10 days ago.
- bsll_5FS_non-diagonal.zip (44.7 KB) - added by YoavAfik 10 days ago.
Download all attachments as: .zip