60 research outputs found
SUSY scenarios according to EWSB
No full textThis talk provides a limited review of SUSY scenarios with the focus on the way electroweak symmetry breaking is achieved and understood under different assumptions. Various aspects of naturalness and their implications are discussed and compared
SUSY scenarios according to EWSB
No full textThis talk provides a limited review of SUSY scenarios with the focus on the way electroweak symmetry breaking is achieved and understood under different assumptions. Various aspects of naturalness and their implications are discussed and compared
Muon g-2 and other observables in models with extended Higgs and matter sectors
No full textI review possible explanations of the muon g-2 anomaly in models with
extended Higgs and matter sectors, focusing on extensions of the standard model
and the two Higgs doublet model with vectorlike leptons. Predictions of these
models, namely the modifications of muon Yukawa and gauge couplings, that can
be searched for at the LHC and future colliders, are summarized. I also discuss
striking predictions for di-Higgs and tri-Higgs signals at a muon collider that
can be tested even at very low energies. Furthermore, I briefly comment on
other interesting features and signatures of models with extended Higgs sector
and vectorlike matter.Comment: 5 pages, 6 figures, contribution to the proceedings of the 20th
Lomonosov conference, Moscow, August 202
Hidden Higgs Scenarios: new constraints and prospects at the LHC
No full textWe review the motivation for hidden Higgs scenarios and discuss the light CP odd Higgs scenario in the NMSSM as an example. We summarize experimental constraints including recent limits from BaBar and Aleph. The main part of the talk is the discussion of dominant decay modes of the standard model like Higgs boson, and related decay modes of the charged Higgs and heavy CP even Higgs bosons, in these scenarios with the focus on signatures and prospects for the LHC. Examples include the direct production of a light CP odd Higgs boson, and a light charged Higgs boson in top quark decays
Loop suppressed electroweak symmetry breaking and naturally heavy superpartners
No full textA model is presented in which O(10 TeV) stop masses, typically required by the Higgs boson mass in supersymmetric models, do not originate from soft supersymmetry breaking terms that would drive the Higgs mass squared parameter to large negative values but rather from the mixing with vectorlike partners. Their contribution to the Higgs mass squared parameter is reduced to threshold corrections and, thus, it is one loop suppressed compared to usual scenarios. New fermion and scalar partners of the top quark with O(10 TeV) masses are predicted
Loop suppressed electroweak symmetry breaking and naturally heavy superpartners
No full textA model is presented in which O(10 TeV) stop masses, typically required by the Higgs boson mass in supersymmetric models, do not originate from soft supersymmetry breaking terms that would drive the Higgs mass squared parameter to large negative values but rather from the mixing with vectorlike partners. Their contribution to the Higgs mass squared parameter is reduced to threshold corrections and, thus, it is one loop suppressed compared to usual scenarios. New fermion and scalar partners of the top quark with O(10 TeV) masses are predicted
New constraints on a light CP-odd Higgs boson and related NMSSM Ideal Higgs Scenarios
No full textRecent BaBar limits on \br(\Upsilon(3S)\to \gam a\to \gam \tau^+\tau^-) and \br(\Upsilon(3S)\to \gam a\to \gam \mu^+\mu^-) provide increased constraints on the a b\anti b coupling of a CP-odd Higgs boson, , with m_a7.5\gev scenarios, which are theoretically the most favored, survive. We also outline the impact of preliminary ALEPH LEP results in the channel. For , only NMSSM ideal Higgs scenarios with m_{h_1}\sim 105\gev (the upper limit of "ideal") and close to satisfy the preliminary ALEPH limits. For \tan\beta\lsim 2, the ALEPH results pick out the most theoretically preferred NMSSM scenarios which are those with close to and m_{h_1}\sim 90\gev-100\gev.Recent BaBar limits on \br(\Upsilon(3S)\to \gam a\to \gam \tau^+\tau^-) and \br(\Upsilon(3S)\to \gam a\to \gam \mu^+\mu^-) provide increased constraints on the a b\anti b coupling of a CP-odd Higgs boson, , with m_a7.5\gev scenarios, which are theoretically the most favored, survive. We also outline the impact of the new ALEPH LEP results in the \epem\to Z+4\tau channel. For , only NMSSM ideal Higgs scenarios with m_{h_1}\gsim 98\gev and close to satisfy the ALEPH limits. For \tan\beta\lsim 2, the ALEPH limits are easily satisfied for the most theoretically preferred NMSSM scenarios, which are those with close to and m_{h_1}\sim 90\gev-100\gev
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