sPHENIX is a new detector at RHIC.

[John Lajoie <lajoie AT iastate.edu>]

Hi Martin,

    Good eye - the fragmentation plots have been updated with additional statistics at high-z since they were shown at the last GM. That makes the statistics kind of funny, so I think it's better plotted with the errors - see attached replacements for Fig. 1.3 with the error bars shown.  I think these show more clearly that any deviations from the SS310 efficiency as a function of leading z are small in both configurations.

Regards,
John

On 10/22/2017 9:44 AM, Martin Purschke wrote:

All,

nicely written document! Some remarks...

I cannot claim that I have been at every meeting, but I don't recall
seeing the 15%-ish *increase* in efficiency in Fig 1.3 (right) at low z
values. This large difference just between the instrumented and
non-instrumented setups (where no instrumentation seems better) is
somewhat counter-intuitive to my eye.

Rosi presented John's distributions in slightly different form at the
Oct 6 fortnightly meeting, and there it looked less pronounced (in both
cases the green curve). Also there the low-z enhancement was in the
charged leading particle plot, neutral was flat, opposite of fig. 1.3.
Is there a simple explanation why one would expect that?


In line 114 the arrow in Y-> e+e- points the wrong way.

My 5cts,

	Martin


On 10/21/17 00:02, Gunther M Roland wrote:

Friends,

As discussed at the General Meeting today, we are forwarding draft 1 of our document outlining the detector scope for a $32M cost cap. The pdf file can be found at 
https://www.dropbox.com/s/5wyutbndogozm5q/sPH-GEN-2017-002_v1.pdf?dl=0
(we'll provide another link tomorrow for those that can't access dropbox)

Please send your comments in reply to this mail, keeping the [sPH-GEN-2017-002] tag in the subject line***. Comments received by close-of-business on Monday, 10/23, will be most useful. 

Cheers,

Gunther and Dave

***we will move future reviews to an sphenix-notes-l AT bnl.gov list, but the list couldn't be generated in time for this note.
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John Lajoie

Professor of Physics

Iowa State University

 

(515) 294-6952

lajoie AT iastate.edu

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