Dear Florian,

I'm trying to use Flavor Decomposition to implement a Yukawa Lagrangian, but I get a notification of invalid sintax.

I wrote: LagYukdown = y1d (({FtL,FbL}).Hs) FbR+(1\Sqrt[2]) y2d ((FdR ({FuL,FdL}))+FsR... etc.

and 'decomposed' the flavor families as:

DEFINITION[EWSB][Flavors]= {
{dL, {FdL,FsL,FbL}},
{dR, {FdR,FsR,FbR}},
...

that were previously defined as:


FermionFields[[1]] = {q, 3, {uL, dL}, 1/6, 2, 3};
FermionFields[[2]] = {l, 3, {vL, eL}, -1/2, 2, 1};
FermionFields[[3]] = {d, 3, conj[dR], 1/3, 1, -3};
FermionFields[[4]] = {u, 3, conj[uR], -2/3, 1, -3};
FermionFields[[5]] = {e, 3, conj[eR], 1, 1, 1};


What would be a rigth notation?

Or can I define fermion fields for each generation as:

FermionFields[[1]] = {u, 1, {uL, dL}, 1/6, 2, 3}; The up generation
FermionFields[[2]] = {s, 1, {sL, cL}, 1/6, 2, 3}; The strange generatiom
....

?

Also, you previously told that Flavor decomposition wouln't hold for SPHENO, but would it work for MICROMEGAS?

Cheers, Humberto

Hi,

1) you can define fermion fields for all generations separately
2) You write the Lagrangian as L=Yu q.u.Hu which gives you terms like Y^ij q_i u_j H_u and you decompose LATER the fields. SARAH splits then the Lagrangian terms. See for instance MSSM/NoFV where this is done for the MSSM.

Yes, the micromegas output is expected to work.

Cheers,
Florian

Thanks a lot, the model implementation is working now!