Brain storming HALHF - Physics, asymmetric detector and IP beam dynamics (D1)

Thursday 3 Jul 2025, 17:00 → 18:00 Europe/Berlin

https://desy.zoom.us/j/62539147570
Meeting ID: 625 3914 7570
Passcode: Det@HALHF

 

 

17:00 → 17:59 Goals until April 2026

Speakers: Brian Foster (DESY/University of Hamburg), Brian Foster (None), Carl Mikael Berggren (FTX (FTX Fachgruppe SLB)), Jenny List (DESY), Juergen Reuter (DESY), Matthew Wing (UCL), Matthew Wing (FTX (Technol. zukuenft. Teilchenph. Experim.))

• Brian: Wim promised to LDG a pre-CRD by spring of next year
• person power: 1 PhD Matthew, 1 PhD Jenny (both partially), Sinead possibly part of post-doc / project students 
• topics:

 

1) produce beam spectra for the new baseline, for sqrt(s) = 250 GeV, but also for 550 GeV (e.g. as HALHF-like upgrade of conventional symmetric 250 GeV LC)

2) update the Higgs recoil plot, and possibly make the analysis a bit more complete (backgrounds, signal fit etc, SGV-based)

3) assess systematic uncertainties on forward-backward asymmetries and compare sys. and asym. case (SGV-based, 250 GeV or Z pole?)

4) assess impact of asymmetric collisions on a 550 GeV flagship analysis, e.g. ZHH (synergies with ongoing symmetric study, SGV-based)

5) assess impact on LLP searches 
       "micro-displaced vertices" / HNLs@Z pole 

6) threshold scan (tt or WW or ...)