Bounds on the simplest little Higgs model mass spectrum through Z leptonic decay
- Centro de Ciencias Naturais e Humanas, Universidade Federal do ABC, Rua Santa Adelia 166, Santo Andre, SP 09210-170 (Brazil)
We derive the leptonic neutral current in the simplest little Higgs model and compute the contribution of the model to the decay width Z{yields}e{sup +}e{sup -}. Using the precision electroweak data we obtain a strong lower bound f{>=}5.6 TeV at 95% C.L. on the characteristic energy scale of the model. It results in a lower bound for the new gauge bosons W{sup '{+-}} and Z{sup '} as being M{sub W{sup '{+-}}}{>=}2.6 TeV and M{sub Z{sup '}}{>=}3.1 TeV, respectively. We also present the allowed values of the k=f{sub 1}/f{sub 2} which is the parameter relating the two vacuum expectation values of the scalar triplets in the model, and the {mu} parameter of a quadratic term, involving the triplets, necessary to provide an acceptable mass range for the standard Higgs boson.
- OSTI ID:
- 21249730
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 5; Other Information: DOI: 10.1103/PhysRevD.77.055001; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Little-Higgs corrections to precision data after CERN LEP2
Limits on the Higgs boson lifetime and width from its decay to four charged leptons