4,475 research outputs found
Complementarity in direct searches for additional Higgs bosons at the LHC and the International Linear Collider
We discuss complementarity of discovery reaches of heavier neutral Higgs
bosons and charged Higgs bosons at the LHC and the International Linear
Collider (ILC) in two Higgs doublet models (2HDMs). We perform a comprehensive
analysis on their production and decay processes for all types of Yukawa
interaction under the softly-broken discrete symmetry which is introduced to
avoid flavour changing neutral currents, and we investigate parameter spaces of
discovering additional Higgs bosons at the ILC beyond the LHC reach. We find
that the 500 GeV run of the ILC with the integrated luminosity of 500 fb^{-1}
shows an advantage for discovering the additional Higgs bosons in the region
where the LHC cannot discover them with the integrated luminosity of 300
fb^{-1}. For the 1 TeV run of the ILC with the integrated luminosity of 1
ab^{-1}, production processes of an additional Higgs boson associated with the
top quark can be useful as discovery channels in some parameter spaces where
the LHC with the integrated luminosity of 3000 fb^{-1} cannot reach. It is
emphasized that the complementary study at the LHC and the ILC is useful not
only to survey additional Higgs bosons at the TeV scale, but also to
discriminate types of Yukawa interaction in the 2HDM.Comment: 42 pages, 55 eps files; revised Figs. 1-3 due to the small change of
parameters, added references, version for publication in Nuclear Physics
Higgs Decay with Minimal Flavor Violation
We consider the tentative indication of flavor-violating Higgs boson decay
recently reported in the CMS experiment within the framework of
minimal flavor violation. Specifically, we adopt the standard model extended
with the seesaw mechanism involving right-handed neutrinos plus effective
dimension-six operators satisfying the minimal flavor violation principle in
the lepton sector. We find that it is possible to accommodate the CMS
signal interpretation provided that the right-handed neutrinos
couple to the Higgs boson in some nontrivial way. We take into account
empirical constraints from other lepton-flavor-violating processes and discuss
how future searches for the decay and conversion in
nuclei may further probe the lepton-flavor-violating Higgs couplings.Comment: 15 pages, no figures, minor errors corrected, references added,
matches publicatio
Revisiting the -physics anomalies in -parity violating MSSM
In recent years, several deviations from the Standard Model predictions in
semileptonic decays of -meson might suggest the existence of new physics
which would break the lepton-flavour universality. In this work, we have
explored the possibility of using muon sneutrinos and right-handed sbottoms to
solve these -physics anomalies simultaneously in -parity violating
minimal supersymmetric standard model. We find that the photonic penguin
induced by exchanging sneutrino can provide sizable lepton flavour universal
contribution due to the existence of logarithmic enhancement for the first
time. This prompts us to use the two-parameter scenario to explain anomaly. Finally, the
numerical analyses show that the muon sneutrinos and right-handed sbottoms can
explain and anomalies simultaneously,
and satisfy the constraints of other related processes, such as decays, mixing, decays, as well as
, , , , , , and decays.Comment: 10 pages, 8 figures, matches to the version published in EPJ
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