PLANCK2024

Session

Parallel Session PI.6

4 Jun 2024, 16:40

IST, Lisboa

Conveners

Parallel Session PI.6

• Juan A. Aguilar-Saavedra

290. Precise Estimation of Charged Higgsino/Wino Decay Rates and Implications for Collider Searches

Satoshi Shirai (Kavli IPMU)

04/06/2024, 16:40

Electroweakly interacting massive particles are strong candidates for
dark matter and are included in various new physics models. For example,
Higgsinos and Winos are leading dark matter candidates in supersymmetry
models. A major characteristic of such dark matter is that there are
slightly heavier isospin partner particles in addition to the dark
matter itself. These particles are...

229. Measuring spin correlations of bottom and charm quark pairs at the LHC

Yevgeny Kats (Ben-Gurion University)

04/06/2024, 17:00

Spin correlations have been studied in detail for top quarks at the LHC, but have not yet been explored for the other flavors of quarks. Utilizing the partial preservation of the quark spin information in baryons in the jet produced by the quark, we present possible analysis strategies for ATLAS and CMS to measure the spin correlations in $b\bar b$ and $c\bar c$ samples. We find that some...

232. $S$-wave contribution to rare $D^0 \to \pi^+ \pi^- \ell^+ \ell^-$ decays in the Standard Model and sensitivity to New Physics

Mr Luiz Vale Silva

04/06/2024, 17:20

Physics of the up-type flavour offers unique possibilities of testing the Standard Model (SM) compared to the down-type flavour sector. Here, I discuss SM and New Physics (NP) contributions to the rare charm-meson decay $ D^0 \to \pi^+ \pi^- \ell^+ \ell^- $. In particular, I discuss the effect of including the lightest scalar isoscalar resonance in the SM picture, namely, the $f_0 (500)$,...

268. Measuring lepton number violation at colliders

Jan Hajer (CFTP, IST, Universidade de Lisboa)

04/06/2024, 17:40

Seesaw extensions of the Standard Model explain the observed neutrino masses by introducing right-handed neutrinos with lepton number violating (LNV) interactions. In order for the neutrinos to be collider-detectable they must form almost mass-degenerate pseudo-Dirac pairs. Their tiny mass splitting leads to heavy neutrino-antineutrino oscillations. A measurement of these oscillations can be...

265. Minimal Dark Matter Search at Muon Collider

Mr Atsuya Niki (University of Tokyo)

04/06/2024, 18:00

Minimal dark matter is one of the most motivated dark matter candidates, and many analyses at collider experiments for this model have been discussed. In our work, we considered the search for minimal dark matter at future high-energy muon collider experiments, in particular the $\mu^+$$\mu^+$ collider experiment. We found that the indirect search, which measures the quantum correction to the...

215. Hunting for Charged Resonances and Minimal Dark Matter at a Muon Collider

Natascia Vignaroli

04/06/2024, 18:20

A multi-TeV muon collider would be very efficient not only for the search for new heavy neutral particles, but also for the discovery of charged bosons of the W′ type. We find that, by analyzing the associated production with a Standard Model W, charged resonances can be probed directly up to multi-TeV mass values close to the collision energy, and for very small couplings with the SM...

294. Imprints of new physics phenomena: from collider to gravitational waves observables

António Morais (University of Aveiro)

04/06/2024, 18:40

Despite the tremendous success of the Standard Model (SM) with its properties remarkably well measured, there is overwhelming phenomenological evidence that strongly suggests the need for physics beyond the current SM, such as explanations for dark matter and neutrino masses. In this presentation we will discuss LISA's potential to reveal further evidence of new physics phenomena through...