Future Collider Forum: 1st Workshop

6 Oct 2021, 09:00 → 8 Oct 2021, 13:00 Europe/Berlin

Online-only

Frank Simon (Max-Planck-Institute for Physics), Georg Weiglein (T (Phenomenology)), Karsten Koeneke (Uni Freiburg)

This is the first workshop of the German Future Collider Forum. Due to the circumstances, it is unfortunately online-only, held on three consecutive days in the mornings.

Connection is via Zoom:

https://cern.zoom.us/j/65920623195?pwd=bnZYWVNndUVxNEtIaFp5SmhMSTJNQT09

Meeting ID: 659 2062 3195
Passcode: 348687

 

Wednesday, 6 October

09:00 → 10:50 Machine Session: Future Accelerators

09:00 Introduction

Speaker: Frank Simon (Max-Planck-Institute for Physics)

Welcome.pdf

09:30 High field magnets

Speaker: Luca Bottura (CERN)

20210421_HFM_FCC.pptx

10:10 FCC-ee: Merits and Challenges

Speaker: Frank Zimmermann (CERN)

FCC-ee - Merits and Challenges.pptx

10:50 → 11:05 Coffee and tea break

11:05 → 12:50 Machine Session: Future Accelerators

11:05 Muon Collider

Speaker: Daniel Schulte (CERN)

Germany2.pdf

11:45 EuPRAXIA - The European ESFRI Plasma Accelerator Facility

Speaker: Ralph Assmann (MPY1 (MPY Fachgruppe 1))

2021-10-05_FCF_WS1_out-compressed.pptx

2021-10-05_FCF_WS1_out.pdf

12:15 ILC Positron Source and Plasma Lenses

Speaker: Gudrid Moortgat-Pick (FLC (Technol. zukuenft. Teilchenph. Experim.))

fc-positron-source.pdf

Thursday, 7 October

09:00 → 11:00 Detector Session

09:00 Detector concepts for Linear Colliders: Status and New Technologies

Speaker: Claude Vallee (CPPM/DESY)

Vallee_FCF.pdf

09:40 Detector Development for Linear and Circular Colliders

Speaker: Dr Felix Sefkow (DESY)

DetDev-LinCirc-FSefkow20211007-upload.pdf

10:20 Open Discussion

Friday, 8 October

09:00 → 10:30 Physics Session

09:00 Introduction to the physics case

Speaker: Michael Krämer (RWTH Aachen)

FCF_2021_mkraemer.pdf

09:40 Tools for Physics studies

Speaker: Thomas Madlener (FLC (FTX Fachgruppe SFT))

tools_sw_fc_ws_1021_tmadlener.pdf

10:30 → 10:45 Coffee and tea break

10:45 → 12:00 Physics Session

10:45 Status of electroweak computations wrt numerical treatment of Feynman integrals

We are working on a computational set up to perform electroweak corrections at the three-loop level. The goal is to cover the computation of three-loop corrections contributing to the pseudo observables which are well defined at the Z-boson resonance.

We would like to present the actual blueprint for the numerical evaluation of Feynman integrals and we are confident, that these ideas can be transferred to other projects dealing with radiative corrections.

Speaker: Johann Usovitsch (CERN)

Usovitsch.pdf

11:10 A Study of Top Anomalous Couplings at the FCC-ee

The FCC-ee as one of the proposed future $e^+e^-$ colliders offers indirect sensitivity to new physics at an unprecedented precision. The couplings of the top quark are of particular interest as it is the heaviest particle in the entire Standard Model suggesting it might couple more strongly to BSM fields. In this study, the expected sensitivity to top anomalous couplings at the FCC-ee is determined. The sensitivity is gauged in the semileptonic channel for top pair produced events in simulated datasets generated with FCCSW in the experimental environment of the IDEA detector at $\sqrt{s}$ = 365 GeV. Jet performance studies consider various jet definitions with work flowing back into FCCAnalyses to reevaluate jet tools in future works. Event reconstruction is performed, an event selection developed, and a kinematic fit is applied using a software package written in connection with the analysis. The 1sigma confidence intervals are determined for a minimal set of top anomalous couplings. The intervals are found from the observables of angular distributions and total cross sections for each coupling separately.

Speaker: Julie Torndal (DESY / University of Copenhagen (NBI))

TopAnomalousCouplings.pdf

11:35 Di-Higgs with missing transverse momentum at FCC-hh

The determination of the Higgs self-coupling from di-Higgs events is one of the clearest benchmarks for the FCC-hh. Its potential has been well established already in several final states. In this talk studies into final states of the di-Higgs system which involve neutrinos are presented. The inclusion of additional final states will help to improve the precision of the self-coupling measurement even further, and specifically neutrino channels will help to shed light on an experimental aspect for the FCC-hh which has not been well investigated yet: a robust reconstruction of the missing transverse momentum (ETMiss) is crucial for such analyses. It is is clear that ETMiss reconstruction at the FCC-hh will be extremely challenging due to the high pile-up enviroment, with the average interactions per bunch crossing expected to be of the order of 1000. First investigations into possible final states, their event selections and potential are presented, which in future can then be used to derive benchmark scenarios for the ETMiss reconstruction performance.

Speaker: Birgit Stapf (ATLAS (LHC Experiment ATLAS))

2021-10-08_FCForum_DiHiggsMET_birgitst.pdf