Experimental Particle and Astro-Particle Physics Seminar

Searching for charged-lepton violation in the muon sector

When the muon was discovered, I. I. Rabi famously asked, " Who ordered that?". Since this discovery, the study of charged leptons has been an integral part of the advances in our understanding of particle physics. The charged lepton sector still has exciting potential to teach us more about fundamental particle physics.  One important question is related to charged lepton flavor violation, where any observed signal would indicate an indisputable discovery of new physics.  I will motivate searches for charged lepton flavor violation as a tool to probe new physics.  I will then focus on the Mu2e experiment at Fermilab where I will describe the apparatus, present its status, and look toward the future discovery potential. 

Searches for strong SUSY in CMS

During 2016 the LHC delivered an unprecedented  amount of proton-proton collision data at a center-of-mass energy of 13 TeV, which is the basis for the latest results of the CMS collaboration. 

This review will focus on strong production of squarks and gluinos and discuss experimental techniques and interpretations of the results in terms of simplified SUSY models.

F. Meloni - University of Geneva

Dark Matter searches with heavy flavour quarks in the ATLAS experiment

Astronomical and cosmological observations constitute strong evidence for the existence of dark matter in the universe. Final states with heavy flavour quarks and momentum imbalance allow to probe models where dark matter is produced in the decay of coloured scalars (top squarks) or neutral scalars (higgs-like mediators). The most recent ATLAS results, using LHC data at sqrt(s)=13 TeV, will be presented. Some of the main analysis techniques and challenges will be reviewed, together with a perspective on the future of dark matter searches at the LHC and its high luminosity upgrades.

Tina Pollmann - TU Munich

First results from the DEAP-3600 single-phase liquid argon Dark Matter experiment

Shigeki Hirose -

Freiburg University

B->D*taunu from Belle

The semitauonic B -> D(*) tau nu decay is sensitive to new physics beyond the Standard Model. Recent experimental studies for R(D(*)), the ratio of the branching fraction of B -> D(*) tau nu to that of B -> D(*) l nu (l = e, mu), show about 4 sigma deviation from the Standard Model expectation. In this talk, B -> D(*) tau nu results at the Belle experiment are discussed, mainly focusing on the latest result in 2017. Here, we measured the tau polarisation for the first time in addition to R(D*). In order to settle the R(D(*)) puzzle, more precise investigation with high statistics data of Belle II is important. The future prospects of R(D(*)) measurements are also given.

29 

November

Alison Mitchell

- Max Planck Institute Heidelberg