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SUMMARY:The new and gauge invariant Littlest Higgs Model with T-parity
DTSTART;VALUE=DATE-TIME:20220321T150000Z
DTEND;VALUE=DATE-TIME:20220321T151500Z
DTSTAMP;VALUE=DATE-TIME:20240921T004554Z
UID:indico-contribution-17799@indico.ific.uv.es
DESCRIPTION:Speakers: Jose María Pérez-Poyatos (Universidad de Granada)\
nIn this talk we will first review the Littlest Higgs model with T-parity
(LHT)\, based on the global symmetry group SU(5) broken spontaneously to S
O(5)\, to highlight the pathologies it presents due to the non trivial int
erplay between the discrete T-parity symmetry and the non-linear realizati
on of the global symmetry. In particular\, we will show that the Yukawa La
grangian responsible for providing mass terms for the heavy fermions is no
t gauge invariant because their right-handed components transforms in a no
n-linear representation of SO(5) and such a transformation does not commut
e\, not even restricting to the gauged subgroup\, with T-parity. To cure t
his issue\, while preserving most of the structure of the original LHT\, w
e propose to enlarge the global symmetry group with an extra [SU(2)xU(1)]^
2 factor broken spontaneously to [SU(2)xU(1)] giving rise to new T-odd sca
lars. This also allows us to introduce the minimal set of fermionic degree
s of freedom required to give masses to all fermions while preserving gaug
e invariance.\n\nhttps://indico.ific.uv.es/event/6457/contributions/17799/
LOCATION:HUELVA
URL:https://indico.ific.uv.es/event/6457/contributions/17799/
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