Conveners
EF08+09+10+02+07: BSM
- Patrick Meade (Stony Brook)
- Simone Pagan Griso (Lawrence Berkeley National Laboratory)
- Tulika Bose (University of Wisconsin-Madison)
- Zhen Liu (University of Maryland)
- Isobel Ojalvo (Princeton University (US))
- Elliot Lipeles (University of Pennsylvania)
- James Hirschauer (Fermi National Accelerator Laboratory)
- Yen-Jie Lee (Massachusetts Institute of Technology)
- Liantao Wang (University of Chicago)
- Nausheen Shah (Wayne State University)
- Swagato Mukherjee (BNL)
- Caterina Doglioni (Lund University)
Description
Zoom Meeting ID: 929 5419 0232
Password: 836689
https://cern.zoom.us/j/92954190232?pwd=RkxvVGRlZWgzZkpoWitSRG1nc1NUQT09
We revisit the Higgs-to-invisible decay ratio in Higgs-portal dark matter models. The Higgs-to-invisible decay searches are powerful probes of the models with increasing sensitivity in upcoming colliders. Close to the mass threshold of a Higgs decay into a pair of DM particles, the coupling value is expected to be very small in order to be compatible with the observed value of the thermal...
One of the important goals of the proposed future $e^+e^-$ collider experiments is the search for dark matter particles using different experimental approaches. The most general one is based on the mono-photon signature, which is expected when production of the invisible final state is accompanied by a hard photon from initial state radiation. We propose the procedure of merging the matrix...
A number of astrophysical observations based on gravitational interactions point to the existence of dark matter (DM) in the Universe, which can not be described with the Standard Model (SM). Many of the proposed extensions of the SM, which can provide a dark matter candidate, involve extended scalar sector and new scalar particles which could be produced at future $e^+e^-$ colliders. We...
The electroweak (EW) sector of the Minimal Supersymmetric Standard Model
(MSSM) can account for variety of experimental data. The lighest
supersymmetric particle (LSP), which we take as the lightest neutralino,
$\tilde \chi_1^0$, can account for the observed Dark Matter (DM)
content of the universe via coannihilation with the next-to-LSP
(NLSP), while being in agreement with negative...
We examine the region of the parameter space of the Next to Minimal
Supersymmetric Standard Model (NMSSM) with a light neutralino~($M_{\tilde\chi_1^0} \leq~$62.5 GeV) where the SM-like Higgs boson can decay invisibly, the thermal neutralino relic density is smaller than the measured cold dark
matter relic density, and where experimental constraints from LHC searches
and flavor physics are...
The neutrino oscillation experiment has clearly pointed out that the Standard Model neutrinos have tiny masses and their flavors are mixed. There are a plenty of models which explain the mechanism of the generation of the neutrino mass. In this talk we will discuss about the simple neutrino mass generation process at the TeV scale which is often called the seesaw mechanism and its testability...
Observed tiny neutrino masses may indicate the existence of new physics including a source of Lepton Number Violation (LNV) at high energies. The effect of such a high-scale physics may be well described by higher dimensional LNV operators. We investigated the dimension-five lepton number violating operator, ℓ±ℓ'±W∓W∓, containing important information on the origin of tiny neutrino masses,...
Plots that compare results of dark matter searches at collider, direct and indirect detection have been prepared for the European Strategy.
Those plots use as comparison benchmarks the simplified models in the Dark Matter Forum whitepaper [arxiv: 1507.00966], but they are only made for coupling values of order unity [arxiv: 1703.05703].
For Snowmass, we propose to prepare a similar set...
I discuss a model that contains in total 3 neutral scalars in the electroweak sector. This model allows for interesting multi-step cascade decays, including hhh and hhhh final states. I present benchmark scenarios for the LHC. Studies might be extended to discuss future collider options.