AJ Comparison Run7 -> Run11

Updated on Fri, 2019-06-21 09:46. Originally created by kkauder on 2019-06-21 09:46.

- p1 is a direct comparison with no further restrictions.

- p2: Enforcing the presence of a 6 GeV high tower after bad tower

maps and after hadronic correction. This is a pretty brutal cut,

removing about 30%. What's interesting is that it affects y7 and y11

pretty much the same way. Recall that NPE18 requires only about ~4.3

GeV, while L2gamma requires 5.5-5.75 GeV, so losing the same

statistics with in one case a mildly higher, in the other a much

higher Et cut is non-trivial.

- p3: Rejecting the refmult dip runs 12138081 -- 12145020

This costs about 20% of events, and it also costs about 20% of dijets.

I would call the two statistically identical.

- p4: Additionally rejecting the phi strip between -1.2 and 0, and all

jets less than 0.4 away from said strip.

That incurs a massive loss of statistics. For a single jet, it's

already 30%, but the dijet requirement essentially doubles that.

It also looks like that leads to a significant change in AJ.

-p 5: The phi strip rejection by itself, to get at least the 20% back

that Nick's study indicates may be largely bad due to differences in

that strip.

The STAR experiment