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--- 2019:groups:bsm:rdm [2019/06/27 08:27]
benjamin.fuks
+++ 2019:groups:bsm:rdm [2019/06/27 17:02]
jose.zurita
@@ Line 3: / Line 3: @@
 Interested people: Benj, Andreas Goudelis, Genevieve Belanger, Dipan Sengupta, Aoife Bharucha, José Zurita, Jose Miguel No, Jordan Bernigaud, Jan Heisig, Giacomo Polesello, Priscilla Pani, Biplob Bhattacherjee, Andre Lessa, Cedric Delaunay, Adil Jueid.
-[Feel free to add your name here and edit tasks!]
+[Feel free to edit tasks!]
 Goal (pseudo-ambitious): study the interplay between RD anomalies and Dark Matter.
@@ Line 10: / Line 10: @@
 Setup: Work in a model with 3 new particles (S1, chi1, chi0) and 3 couplings y^L_{3X}, y^{R}_{23} and y_D. S1 is a scalar leptoquark solving the RD anomalies, chi1 and chi0 are fermions, probably close in mass, with chi0 being a SM singlet, hence chi1 has the same SM gauge charges as S1.
+Tasks (updated from 27.06.2019)
+- We will meet on 16.07.2017 at 16:00 CERN time!!!
+- Existing UFO seems to work. AG wants to check the .fr file.
+- Flavor constraints: Marco made a survey of existing bounds. To make a long story short:
+a) D-Dbar mixing is suppressed by theta_C^3 and one chirality flip. Gives no meaningful bounds.
+b) Bc -> tau nu, Z->tau tau (1-loop x EFT) give bounds (computed).
+c) Sewing altogether the allowed region can be displayed in the yL23-yR33 plane, with the results that yL < = yR. The scaling with S1 mass is seemingly trivial (to be checked). Plot by Marco will come soon (from Davide). Ref point of mS1=1.5 TeV, yL=1=yR solves the RD anomalies
+) Relic density: from coannihilation, GB says that mchi1=890 and mchi0=800 with yd=1 gives the right relic. Ongoing work (Jan, André, Genevieve) on checking the CDFO.
+) Recasting collider searches:
+i) Benj wants to set-up the recast of the LQ_res + MET search.
+ii) Bounds on chi1 come from mono/multi-jet + MET. Some of these were recasted in Fig.7 of [[https://arxiv.org/pdf/1703.00452.pdf|this fantastic paper]] (take the XF3 shaded region), which means that 500-600 GeV were excluded with the ATLAS 13.3 fb-1 search, and that HL-LHC will push the bounds to 1.1 - 1.3 TeV. Bound is almost independent on the compression (mchi1-mchi0).
+iii) bounds from l + LQ, where LQ -> a) tau charm, b) top +tau and c) b nu. Easier to have the charm in the initial state, due to PDF suppression (but b is also possible). Giacomo, José and Jordan will look into existing searches that could give constraints.
+) 1-loop direct detection is under investigation
+) Jordan will set-up a Dropbox folder for the project
 Tasks (updated, from 25.06.2019):
-- Expand existing UFO for dark matter: add yD coupling. Make it Micromegas friendly by including tildes for dark particles (see below for details on the model). In charge:JB, DS
+- Expand existing UFO for dark matter: add yD coupling. Make it Micromegas friendly by including tildes for dark particles (see below for details on the model). In charge: Benj,JB, DS
   * FeynRules implementation (v2)  + toy mathematica notebook: {{ 2019:groups:bsm:lqdm.fr.v2.tgz | here}}.
   * CalcHEP/UFO v2 files: {{ 2019:groups:bsm:lqdm.ch.v2.tgz | CH}} and {{ 2019:groups:bsm:lqdm.ufo.v2.tgz | UFO}}.

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