Measuring a high pT p+p reference @ √s ≈ 20 GeV ?

• Option (1):

• SPS-NA49 ?

• SPS- NA57 / WA97 ?

• Option (2): RHIC Au+Au, p+p run at √s ≈ 20 GeV (feasible, though would need more support from RHIC community, long runs required to collect stat !)