Article
A SUPERSYMMETRIC 341 MODEL
International Journal of Modern Physics A (Impact Factor: 1.13). 01/2012; 22(32). DOI: 10.1142/S0217751X07037275
Source: arXiv

Article: Phenomenology of a threefamily model with gauge symmetry SU(3)c otimes SU(4)L otimes U(1)X
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ABSTRACT: We study an extension of the gauge group SU(3)c otimes SU(2)L otimes U(1)Y of the standard model to the symmetry group SU(3)c otimes SU(4)L otimes U(1)X (341 for short). This extension provides an interesting attempt to answer the question of family replication in the sense that models for the electroweak interaction can be constructed so that anomaly cancellation is achieved by an interplay between generations, all of them under the condition that the number of families must be divisible by the number of colours of SU(3)c. This method of anomaly cancellation requires a family of quarks transforming differently from the other two, thus leading to treelevel flavour changing neutral currents (FCNC) transmitted by the two extra neutral gauge bosons Z' and Z'' predicted by the model. In a version of the 341 extension, which does not contain particles with exotic electric charges, we study the fermion mass spectrum and some aspects of the phenomenology of the neutral gauge boson sector. In particular, we impose limits on the Z  Z' mixing angle and on the mass scale of the corresponding physical new neutral gauge boson Z2, and establish a lower bound on the mass of the additional new neutral gauge boson Z'' ≡ Z3. For the analysis we use updated precision electroweak data at the Zpole from the CERN LEP and SLAC Linear Collider, and atomic parity violation data. The mass scale of the additional new neutral gauge boson Z3 is constrained by using updated experimental inputs from neutral meson mixing in the analysis of the sources of FCNC in the model. The data constrain the Z  Z' mixing angle to a very small value of {\cal O}(10^{3}) , and the lower bounds on M_{Z_2} and M_{Z_3} are found to be of {\cal O}(1\; TeV) and {\cal O}(7\;TeV) , respectively.Journal of Physics G Nuclear and Particle Physics 01/2009; 36. · 5.33 Impact Factor  [Show abstract] [Hide abstract]
ABSTRACT: We point out the production of the charginos and neutralinos in electronelectron process in several supersymmetric models, in order to show that the International Linear Collider can discover double charged charginos if these particles really exist in nature.International Journal of Modern Physics A 01/2012; 22(31). · 1.13 Impact Factor
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