LCVision Generic Paper - Physics part

10 Dec 2024, 00:00 → 11 Dec 2024, 01:00 Europe/Paris

Roman Poeschl is inviting you to a scheduled Zoom meeting.

Topic: LCVision - Physics Part
Time: This is a recurring meeting Meet anytime

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Meeting ID: 681 6574 0245
Passcode: 283565

 

Attendees (copied from zoom report): 

Howard Baer

Roman Poeschl

Jorge de Blas

Sabine Kraml

Jürgen Reuter

Taikan Suehara

Kei Yagyu

Natsumi Nagata

Koji Tsumura

Jenny List

Aleksander Filip Żarnecki

Caterina Vernieri

gudrid

Graham Wilson

Junping Tian

Marcel Vos

Ivo Schulthess (DESY)

Dirk Zerwas

Jan Strube

michael peskin

Ariel Schwartzman

Johannes Braathen

 

• General
  • The document should correctly point out ("sell") the potential of a LCF
    • high centre-of-mass energies
    • beam polarisation
    • two detectors
    • The 11 years at 250 GeV as in earlier run plans are not a due to a technical limitation of the ILC technology  
• Higgs at 250 GeV
  • The influence of the Z-pole results on the Higgs precision to be taken into account
  • Relation "isolated" Higgs couplings and global interpretations (is maybe true for many topics)
• 2f and 4f including Z-pole and WW scattering
  • Point out (at least in an outlook) how a signiicant increase in lumi could be beneficial for the W mass
• Higgs at highest energies
  • Johannes reminded that new physics could shine up directly in  \lambda_hhh even  if the single Higgs couplings are standard
  • Overlap with e.g. GW could/should become part of the paper
• top from threshold to highest energies 
  • Value of top coupling precision to discover new physics (e.g. compositeness)
• ttH and WW
  • ttH could benefit from an overhaul (on theory and experimental side)
  • What to do with expected precision of 1% at 1 TeV
    • New physics models?
    • tth (and top mass) important for parametric uncertainties 
  • WW polarisation fraction could be an important observable 
  • hadronic separation of W/Z (still) important topic
  • WW->tt as a (new) topic (at least R.P. has never thought about it :-( )?
• BSM - Direct production of new particles
  • FCNC should be mentioned (either here or under top)
  • Discussion about balance between "reaction" to bumps at LHC and full scrutinisation of region between 100 Gev and 1 TeV to search for LHC Loopholes
    • It was pointed out that the small and big hierarchy problem is still an excellent guide to search for new physics and this still implies new physics at the 1 TeV scale
• Global interpretation 
  • Seems to be important to define the scope of the global fits
  • NLO SMEFT is newest development but not all corrections are known
  • It was agreed that the prediction power of the global fits should also be demonstrated at the ecample of concrete models
• Photon-Photon interactions
  • nothing to add
• Non-collider experiments
  • Discovery study of heavy mesons were pointed out 
  • Strong QED in beam-beam interactions (did I get this right?)
  • Opportunity of fixed target experiments with high energetic positrons 

 

Tuesday 10 December

1 Introduction

Speakers: Michael Peskin, Roman Poeschl (Université Paris-Saclay (FR))

talk101224.pdf

2 Reminder - LCVision Event

Speaker: Jenny List (Deutsches Elektronen-Synchrotron (DE))

3 Discussion - Higgs@250 GeV

4 Discussion - Higgs at highest energies

5 Discussion -Top - From threshold to highest energies

6 Discussion - Top Yukawa Coupling, Triple and Quartic Gauge Interactions

Wednesday 11 December

7 Discussion - Direct Production of New Particles

8 Discussion - Global interpretations

9 Discussion - Added Value of Alternative collider modes

10 Discussion - Beyond Collider Physics Opportunities