Changes between Version 146 and Version 147 of ALRM


Ignore:
Timestamp:
10/27/16 19:19:31 (4 years ago)
Author:
mashry
Comment:

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  • ALRM

    v146 v147  
    2020
    2121
    22 As any other left-right symmetric model, ALRM is a QFT gauged by the gauge symmetry group ''SU(3),,C,,×SU(2)_L×SU(2)_R×U(1)_B-L''. The latter ''B'' and ''L'' being the baryon and lepton numbers. An extra discrete symmetry ''S'' is imposed to distinguish between Higgs fields and their dual fields and hence their interactions.
     22As any other left-right symmetric model, ALRM is a QFT gauged by the gauge symmetry group ''SU(3),,C,,×SU(2),,L,,×SU(2),,R,,×U(1),,B-L,,''. The latter ''B'' and ''L'' being the baryon and lepton numbers. An extra discrete symmetry ''S'' is imposed to distinguish between Higgs fields and their dual fields and hence their interactions.
    2323
    24 As in the SM, left fermions compose ''SU(2)_L'' doublets. Right charged leptons are accommodated in ''SU(2)_R'' doublets with corresponding extra particles (scotinos) and right up-quarks in ''SU(2)_R'' doublets with corresponding extra down-type exotic quarks. Right neutrinos and down-quarks are ''SU(2)_L,R'' singlets. The Higgs sector composes of an ''SU(2)_L''-doublet, an ''SU(2)_R''-doublet and a bidoublet.
     24As in the SM, left fermions compose ''SU(2),,L,,'' doublets. Right charged leptons are accommodated in ''SU(2),,R,,'' doublets with corresponding extra particles (scotinos) and right up-quarks in ''SU(2),,R,,'' doublets with corresponding extra down-type exotic quarks. Right neutrinos and down-quarks are ''SU(2),,L,R,,'' singlets. The Higgs sector composes of an ''SU(2),,L,,''-doublet, an ''SU(2),,R,,''-doublet and a bidoublet.
    2525
    26 The electroweak left-right symmetry ''SU(2)_L×SU(2)_R×U(1)_B-L'' is broken down to the SM electroweak symmetry ''SU(2)_L×U(1)_Y'', ''Y'' being the hypercharge, by the ''SU(2)_R''-doublet vev, then the electroweak symmetry is broken down to the ''U(1)_em'' through the bidoublet and the ''SU(2)_L''-doublet vevs. Accordingly, all ferminos and gauge bosons (except of course photon) become massive via Higgs mechanism. The physical gauge sector of the model contains the electroweak gauge bosons (photon, ''W'' and ''Z'' bosons) in addition to two extra gauge bosons (''W' '' and ''Z' '') correspond to the ''SU(2)_R'' group.
     26The electroweak left-right symmetry ''SU(2),,L,,×SU(2),,R,,×U(1),,B-L,,'' is broken down to the SM electroweak symmetry ''SU(2),,L,,×U(1),,Y,,'', ''Y'' being the hypercharge, by the ''SU(2),,R,,''-doublet vev, then the electroweak symmetry is broken down to the ''U(1),,em,,'' through the bidoublet and the ''SU(2),,L,,''-doublet vevs. Accordingly, all ferminos and gauge bosons (except of course photon) become massive via Higgs mechanism. The physical gauge sector of the model contains the electroweak gauge bosons (photon, ''W'' and ''Z'' bosons) in addition to two extra gauge bosons (''W' '' and ''Z' '') correspond to the ''SU(2),,R,,'' group.
    2727
    2828Dirac (massive) neutrinos are considered with the mixing MNS matrix implemented in the normal hierarchy. The case of Majorana neutrinos is considered in many other models' files and can be brought to be implemented here easily. Three mixed generations of quarks are considered and hence the general case of the CKM matrix is implemented. In addition, it was considered that the left-right symmetry is manifest, that is the left and right MNS and CKM mixing matrices are coincident. However, this can be generalized directly.
     
    3030The model contains ten physical Higgs bosons: four neutral ''CP''-even higgs bosons, one (the lightest) of which is considered to be the SM-like one with mass fixed to have the value ''mh''=125 GeV. Four charged Higgs bosons and two ''CP''-odd pseudoscalar Higgs bosons. The mass spectrum is calculated and the rotation matrices are implemented analytically.
    3131
    32 Minimization conditions and spectrum relations are all used to express the whole model parameters and spectra in terms of only five independent (external) parameters: ''tanbeta, lambda_2, lambda_3, alpha_1, alpha_2''. As in any two-Higgs doublet model, e.g., MSSM, ''tanbeta'' is the ratio between two vevs. The parameters ''lambda_2, lambda_3, alpha_1, alpha_2'' are dimensionless potential parameters. The charged Higgs masses are implemented as external parameters.
     32Minimization conditions and spectrum relations are all used to express the whole model parameters and spectra in terms of only five independent (external) parameters: ''tanbeta, lambda,,2,,, lambda,,3,,, alpha,,1,,, alpha,,2,,''. As in any two-Higgs doublet model, e.g., MSSM, ''tanbeta'' is the ratio between two vevs. The parameters ''lambda,,2,,, lambda,,3,,, alpha,,1,,, alpha,,2,,'' are dimensionless potential parameters. The charged Higgs masses are implemented as external parameters.
    3333
    3434The effective loop-induced h->gluongluon, gammagamma, Zgamma, ZZ and WW decays were added. For the complete pp->gammagamma analysis, '''''Madgraph''''' is used as the monte carlo (MC) event generator (EG), '''''Pythia''''' is used for parton showering (PS), matrix element (ME) and PS merging, hadronization and jet matching, then '''''Delphes''''' is used as a detector simulator and finally '''''Madanalysis''''' is used for event file analysis, recasting the LHC results and to produce this histogram figures (to be improved):