445 research outputs found
Tau-lepton Physics at the FCC-ee circular ee Collider
The future FCC-ee collider is designed to deliver
collisions to study with ultimate precision the Z, W, and Higgs bosons, and the
top quark. In a high-statistics scan around the Z pole,
events will be produced, the largest sample of
events foreseen at any lepton collider. With their large boost,
leptons from Z decays are particularly well suited for precision
measurements. The focus of this report is on tests of lepton universality from
precision measurement of properties and on tests of charged
lepton flavour violation in Z decays and in decays. In both of these
areas, FCC-ee promises sensitivities well beyond present experimental limits.Comment: 15 pages, 5 figures, 5 tables. Proceedings for the 15th International
Workshop in Tau Lepton Physics. Update: fix referenc
Using Open-Data Portals, Remote Sensing and Computational Modelling to Investigate Historic Wreck Sites and Their Environments: 45 Years on from Muckelroy
We explored site formation processes at 549 shipwrecks in the North and Baltic Seas using multibeam echosounder (MBES) data and environmental/anthropogenic variables. Phase 1 classified the structural integrity of each wreck. Phase 2 used regression modelling to explore correlations between wreck class and environmental variables at individual sites. A best-fit model comprised depth, salinity, fishing intensity, and wreck year. In phase 3 multi-criteria analysis predicted preservation potential across the full model domain. Highest preservation potential is modelled for the southern Baltic Sea and Norwegian Trench, with low potential in shallower areas of the North Sea and off England, Netherlands and Germany
Machine detector interface for the future circular collider
The international Future Circular Collider (FCC) study aims at a design of
, , colliders to be built in a new 100 km tunnel in the Geneva
region. The collider (FCC-ee) has a centre of mass energy range
between 90 (Z-pole) and 375 GeV (tt_bar). To reach such unprecedented energies
and luminosities, the design of the interaction region is crucial. The
crab-waist collision scheme has been chosen for the design and it will be
compatible with all beam energies. In this paper we will describe the machine
detector interface layout including the solenoid compensation scheme. We will
describe how this layout fulfills all the requirements set by the parameters
table and by the physical constraints. We will summarize the studies of the
impact of the synchrotron radiation, the analysis of trapped modes and of the
backgrounds induced by single beam and luminosity effects giving an estimate of
the losses in the interaction region and in the detector.Comment: 6 pages, 7 figures, 62th ICFA ABDW on High Luminosity Circular
Colliders, eeFACT2018, Hong Kong, Chin
Snowmass 2021 White Paper: Charged lepton flavor violation in the tau sector
Charged lepton flavor violation has long been recognized as unambiguous
signature of New Physics. Here we describe the physics capabilities and
discovery potential of New Physics models with charged lepton flavor violation
in the tau sector as its experimental signature. Current experimental status
from the B-Factory experiments BaBar, Belle and Belle II, and future prospects
at Super Tau Charm Factory, LHC, EIC and FCC-ee experiments to discover New
Physics via charged lepton flavor violation in the tau sector are discussed in
detail.
Submitted to the Proceedings of the US Community Study on the Future of
Particle Physics (Snowmass 2021)Comment: Contribution to Snowmass 202
- …