[G14_run] Fwd: CLAS CVS: packages/eloss HDICE.F HDICEupstream.F

[Eugene Pasyuk]

There must be polar angle dependence of the correction because particle see different different pieces of IBC. So, the fact you see it is a good thing. To check if its correctly accounted for one needs to look at some missing mass peak position dependence on the polar angle. After correction is applied there should not be dependence if eloss works correctly. Before the correction you may see similar discontinuities as you see in delta E and they should be at the same angles. 

-Eugene 

----- Original Message -----

> From: "Haiyun Lu" <hlu at jlab.org>
> To: "g14 run" <g14_run at jlab.org>
> Sent: Wednesday, April 23, 2014 4:06:27 PM
> Subject: Re: [G14_run] Fwd: CLAS CVS: packages/eloss HDICE.F
> HDICEupstream.F

> I found a mistake in my code. The y axis was labeled "delta E", which
> is supposed to be the difference of energy before and after
> correction. But the histogram was filled with "delta momentum". I
> produced a correct histogram and attached (eloss.png).

> To solve the issue that there are multiple bands in the histogram of
> energy loss vs. momentum as shown by Dao and Peng, I generated
> protons and pions of various momenta, polar angles, and vertex
> positions. I attached a pdf file to demonstrate them. As a summary,
> the polar angle dependence of the energy loss produces the multiple
> bands.

> On 04/14/2014 10:00 AM, Haiyun Lu wrote:

> > I attached the new result of eloss correction for proton and pi-.
> 

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