sPHENIX discussion of physics

[Anthony Frawley <afrawley AT fsu.edu>]

Hi All,

To prepare and test our reconstruction and analysis chains for processing pp collision data, we need to produce simulated data files that look like what we expect to see from pp collision data. This is a request for feedback on what should go into those simulations.

The simulations should produce the same information as what we expect from the DAQ following each rare event trigger (a "trigger frame").

  The collision that fired one of the rare event triggers.

    – Data from all subsystems

  A number of minimum bias Pythia8 pp collisions from extended readout of the three tracking subsystems.

   – Data from the tracking detectors

  Trigger information

The decisions that have to be made before we can produce these simulated files are the following:

  Which rare event triggers do we want to use.

    – Jets? (which ones?), Upsilons?, HF jets?

  What collision rate do we assume?

    – 1 MHz? 1.5 MHz? 2 MHz?

  What extended readout time do we want?

    – Depends on collision rate. At 3 MHz we were using 7 μs.

Please give this some thought and give us some feedback. We cannot effectively set up and test reconstruction and analysis workflows without these simulations.

It is important for everyone to recognize that pp collision data will NOT look like simulated single Pythia events.

Thanks

Tony