GD/I WG: Physics Requirements


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Thanks to the Project Management for the update on the mechanical design for the backward endcap: 

  • New location for the EEMC to reduce the EMCal coverage gap with barrel BEMC; easier overlap between backward and barrel EMCal in case the imaging BECAL is adopted;
  • Serious concerns over backward AC-LGAD for space available and vicinity to the PWO crystals which requires stringent temperature control 
  • In the option of imaging BECAL, moving the BECAL to higher radius has significant  cost implications (R^2 scaling);
  • In the option of pfRICH, shorter expansion vol. (e.g. 30cm) and its performance impact should be explored


Thanks to three Physics WGs updating on the requirements on low pT tracking and PIDs: 

  • The inclusive group provided a comprehensive map of the electron detection requirement, in particular, the relation between kinematics reaches and low momentum cut-off for electrons. 
  • The HF/Jet group showed 
    • the quantitative improvement of the Lambda_c statistical significance (about x2) with the TOF rejecting low momentum background for the proton decay channel; 
    • D0 channel does not benefit from TOF; 
    • The TOF information in the backward is not regarded as a major need for these physics measurements (other than e-induced T0 determination)  
  • SIDIS group presented the low momentum tracking impact to SIDIS A_LL, dihadron IFF, and Lambda final state. SIDIS in barrel benefits from ToF, SIDIS less strong demand in FWD for anything below 1 GeV 


GD/I activity planning:

Moving forward with the global detector design, we aim to define two simulation setups for Oct Campaign in the next two GDI meetings. (see earlier email announcement from GDI)

There are minutes attached to this event. Show them.
    • 9:25 AM 9:45 AM
      Backward end-cap integration 20m
      Speakers: E. C. Aschenauer (BNL), Rolf Ent (Jefferson Lab)
    • 9:45 AM 10:05 AM
      Electron detection requirement from inclusive WG 20m
      Speaker: Barak Schmookler (UC Riverside)
    • 10:05 AM 10:45 AM
      Low pT hadron ID (pi/K, K/Proton) 40m
      • low pT impact on HF reconstruction 20m
        Speakers: Wenqing Fan (Lawrence Berkeley National Laboratory), Wenqing Fan (Lawrence Berkeley National Laboratory)
      • SIDIS WG studies 20m
        Speakers: Anselm Vossen (Duke University), Anselm Vossen (;