Altas Energías

Heavy quarks within electroweak multiplet

by Dr. Jaime Besprosvany (Instituto de Física, UNAM)

Wednesday, 15 March 2017 from to (Mexico/General)
at ICN-UNAM ( Salon de seminarios de Gravitación y Altas Energías )
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Avenida Universidad No. 3000, Col. UNAM-C.U. Distrito Federal, C.P. 04510, México
Description
Standard-model fields and their associated electroweak Lagrangian are
equivalently expressed in a shared spin basis. The scalar-vector terms are
written with scalar-operator components acting on quark-doublet elements,
and shown to be parametrization-invariant. Such terms, and the t- and
b-quark Yukawa terms are linked by the identification of the common
mass-generating Higgs operating upon the other fields, after acquiring a
vacuum expectation value v . Thus, the customary vector masses are related
to the fermions', fixing the t-quark mass m_t with the relation m_t^2+m_b^2=v^2/2, 
either for maximal hierarchy, or given the b-quark mass m_b , implying
m_t≃173.9 GeV, for v=246 GeV. An interpretation follows that electroweak
bosons and heavy quarks belong in a multiplet.
[Ref. https://arxiv.org/abs/1701.01191]
Material:
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