Conveners
Plenary talks: Session 1 -- Intro, dedicated detectors at the LHC, and new theory developments
- Nishita Desai (LUPM, Montpellier)
- James Beacham (Duke University (US))
Plenary talks: Session 2 -- Theoretical overview, PBC & FIPs, HL-LHC, new theory/pheno ideas
- Federico Leo Redi (EPFL - Ecole Polytechnique Federale Lausanne (CH))
- Matthew Daniel Citron (Univ. of California Santa Barbara (US))
Plenary talks: Session 3 -- More dedicated LLP detectors at the LHC and other LLPs at CERN
- Ryu Sawada (University of Tokyo (JP))
- Albert De Roeck (CERN)
Plenary talks: Session 4 -- New results from ATLAS and CMS, dark shower / dark QCD phenomenology
- José Francisco Zurita (KIT)
- Juliette Alimena (Ohio State University (US))
Plenary talks: Session 5 -- Triggering ideas for ATLAS and CMS and a new result from CMS
- Rebeca Gonzalez Suarez (Uppsala University (SE))
- Carlos Vazquez Sierra (Nikhef National institute for subatomic physics (NL))
Confining hidden sectors are an attractive possibility for physics beyond the Standard Model (SM). They are especially motivated by neutral naturalness theories, which reconcile the lightness of the Higgs with the strong constraints on colored top partners. We study hidden QCD with one light quark flavor, coupled to the SM via effective operators suppressed by the mass of new...
We are developing a proposal to search for neutral particles with masses up to a few GeV, produced at $\eta$ = 6 - 7, penetrating 42m of steel and decaying in a large diameter 27m-long vacuum pipe. This would be a new subsystem for CMS in Run 4 with high luminosity. There is sensitivity to lifetimes in the range $\gamma.c.\tau$ from about 10m to several km. Decays to lepton pairs (including...
The search for long-lived particles is an exciting physics opportunity in the upcoming runs of the Large Hadron Collider. We uniquely study the potential of using the High Granularity Calorimeter (HGCAL), part of the upgrade of the CMS detector, in such searches. In particular, we demonstrate that the precise pointing capability coming with this upgrade can play a crucial roll in identifying...
A subcomponent of dark matter could in the form of "dark atoms", which emit dark radiation and could have cooled to form a second "dark disk" in our galaxy. Dark atoms are predicted in a variety of models, in particular the Mirror Twin Higgs model. I will present new constraints on this type of dark matter from white dwarf cooling -- if white dwarfs have a captured nugget of dark atoms in...
The charged current production of long-lived heavy neutrinos at the LHC can use a prompt charged lepton for triggering the measurement of the process. However, in order to fully characterize the heavy neutrino interactions, it is necessary to also probe Higgs or Z mediated neutral current production. In this case the charged lepton is not available, so other means of triggering are...
The CMS track trigger may enable a dedicated trigger for a displaced, multi-track vertex. This would open up qualitatively now parameter space for e.g. Higgs decays to LLP, which in turn decay hadronically.
Long-lived particles are predicted in many extensions beyond the standard model. They often have unique signatures in the detector. A particularly interesting model considers long-lived particles decaying hadronically just in front of or inside the CMS muon system. These particles are capable of producing large shower of hits in the muon chambers. Due to bandwidth limitations the current muon...
Triggering long-lived particles at the first stage of the trigger system is very crucial in LLP searches to ensure that we do not miss them at the very beginning. The future High Luminosity runs of the Large Hadron Collider will have increased number of pile-up (PU) events per bunch crossing and there will be major upgrades in hardware, firmware and software sides, like tracking at level-1...
