Changes between Version 5 and Version 6 of HAHM

Timestamp:

Nov 13, 2023, 3:40:32 PM (12 months ago)

Author:

DavidCurtin

Comment:

--

HAHM

@@ -5 +5 @@
 NOTE: FOR COMPILATION WITH FEYNRULES 2.3.31, USE v5 (see below)
 
-A very simple extension of the standard model involves adding a "dark" U(1) gauge group that is broken by a dark higgs vev. The "dark vector" ZD can then kinetically mix with the U(1)B gauge boson, and the "dark higgs" S (or hS) can mix with the SM doublet higgs via the higgs portal |H|2|S|2 operator. (For a more complete definition see here.) This can induce a variety of exotic higgs decays like h → Z ZD (if kinetic mixing dominates) h → ZD ZD (if higgs mixing dominates) h → S S (if higgs mixing dominates)
+A very simple extension of the standard model involves adding a "dark" U(1) gauge group that is broken by a dark higgs vev. The "dark vector" ZD can then kinetically mix with the U(1)B gauge boson, and the "dark higgs" S (or hS) can mix with the SM doublet higgs via the higgs portal |H|^2 |S|^2  operator. (For a more complete definition see here.) This can induce a variety of exotic higgs decays like h → Z ZD (if kinetic mixing dominates) h → ZD ZD (if higgs mixing dominates) h → S S (if higgs mixing dominates)
 
 S inherits its decay modes from the SM higgs, while ZD couples proportional to gauge charge, giving lepton-rich final states. Cascades like h → S S → ZDZDZDZD are also possible, giving 8 lepton final states.
@@ -15 +15 @@
 To facilitate experimental study of these interesting channels we have constructed a Madgraph5 model to implement this SM extension.
 
-The model is constructed using FeynRules 2.0.23. It is originally based on the HAHM Model (https://feynrules.irmp.ucl.ac.be/wiki/HiddenAbelianHiggsModel), but has been extensively modified to correct typos and implement self-consistent derivation of all mixing angles from MZ, MZD, Mh, MhS mass eigenvalue inputs go beyond the small-mixing-approximation adopt a definition of mixing angles so that, for small higgs/kinetic mixing << 1, the corresponding mixing angles will also be << 1 regardless of whether the h/Z is heavier or lighter than hS/ZD, and self-consistently modify SM relations that result from Z-ZD mixing in two different ways (shift W-mass or Weinberg angle) It has also been combined with the Higgs Effective Theory Model (https://feynrules.irmp.ucl.ac.be/wiki/HiggsEffectiveTheory) to add the effective hgg and hγγ operators.
+The model is constructed using FeynRules 2.0.23. It is originally based on the Hidden Abelian Higgs Model (https://feynrules.irmp.ucl.ac.be/wiki/HiddenAbelianHiggsModel), but has been extensively modified to correct typos and implement self-consistent derivation of all mixing angles from MZ, MZD, Mh, MhS mass eigenvalue inputs go beyond the small-mixing-approximation adopt a definition of mixing angles so that, for small higgs/kinetic mixing << 1, the corresponding mixing angles will also be << 1 regardless of whether the h/Z is heavier or lighter than hS/ZD, and self-consistently modify SM relations that result from Z-ZD mixing in two different ways (shift W-mass or Weinberg angle) It has also been combined with the Higgs Effective Theory Model (https://feynrules.irmp.ucl.ac.be/wiki/HiggsEffectiveTheory) to add the effective hgg and hγγ operators.
 
 This MG model can also be used to generate NMSSM-type decays like h→SS→4b by setting kinetic mixing to be tiny (don't use exactly zero, it causes errors), and similarly to generate pure kinetic mixing phenomenology by setting the higgs mixing to zero.