3,265 research outputs found
Higher dimensional operators in 2HDM
We present a complete (non-redundant) basis of CP- and flavour-conserving
six-dimensional operators in a two Higgs doublet model (2HDM). We include
Z_2-violating operators as well. In such a 2HDM effective field theory
(2HDMEFT), we estimate how constraining the 2HDM parameter space from
experiments can get disturbed due to these operators. Our basis is motivated by
the strongly interacting light Higgs (SILH) basis used in the standard model
effective field theory (SMEFT). We find out bounds on combinations of Wilson
coefficients of such operators from precision observables, signal strengths of
Higgs decaying into vector bosons etc. In 2HDMEFT, the 2HDM parameter space can
play a significant role while deriving such constraints, by leading to reduced
or even enhanced effects compared to SMEFT in certain processes. We also
comment on the implications of the SILH suppressions in such considerations.Comment: 34 pages, 6 figures; to appear in JHE
Some low energy effects of a light stabilized radion in the Randall-Sundrum model
In this paper we study some low energy effects of a light stabilized radion
in the Randall-Sundrum scenario. We find that the NLC 500 with its projected
precision level will be able to probe the radion contribution to the anomalous
magnetic moment and electric quadrupole moment of W boson for values of radion
vev up to 500 Gev. On the other hand the BNL experiment E821 will be able to
test the radion contribution to for 1 Tev radion vev and . We have also shown that the higgs-radion mixing induces a 2.6%
correction in the WWh coupling. Finally by comparing the radionstrahlung with
the higgsstrahlung process we have found that the LEPI bound on the higgs mass
based on decay mode suggests a lower bound of about 35 Gev on
the radion mass.Comment: Plain Tex, 9 pages, No figures. The text has been revised and the
effects of higgs-radion mixing induced by top quark loop on WWh and ZZh
coupling has been adde
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