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<div class="moz-cite-prefix">Radiative tail is visible starting at
W=2.8 GeV, see below, from the 6.4 GeV data from spring run, <br>
but not terrible at W <3 GeV (20%?) <br>
Volker<br>
<br>
<br>
<img src="cid:part1.06EB2987.8A47FC56@jlab.org" alt="" width="391"
height="418"><br>
<br>
On 11/9/18 12:44 PM, Viktor Mokeev wrote:<br>
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<blockquote type="cite"
cite="mid:717317358.11927280.1541785482677.JavaMail.zimbra@jlab.org">
<pre wrap="">Dear All,
I computed the sharp threshold for W_min=1.5 GeV and W_max=2.5 GeV. I agree with Volker numbers which take into accounbt the hybrid widths. The remaining question is whether rad. tail will allow us to analyze W>2.5 GeV?
Best Regards,
Victor
----- Original Message -----
From: "burkert" <a class="moz-txt-link-rfc2396E" href="mailto:burkert@jlab.org"><burkert@jlab.org></a>
To: "Valery Kubarovsky" <a class="moz-txt-link-rfc2396E" href="mailto:vpk@jlab.org"><vpk@jlab.org></a>, "Viktor Mokeev" <a class="moz-txt-link-rfc2396E" href="mailto:mokeev@jlab.org"><mokeev@jlab.org></a>
Cc: "clas12 rgk" <a class="moz-txt-link-rfc2396E" href="mailto:clas12_rgk@jlab.org"><clas12_rgk@jlab.org></a>, "annalisa dangelo" <a class="moz-txt-link-rfc2396E" href="mailto:annalisa.dangelo@roma2.infn.it"><annalisa.dangelo@roma2.infn.it></a>
Sent: Friday, November 9, 2018 11:51:55 AM
Subject: Re: Range of the scattered electron energies
I think Victor calculated a sharp threshold without considering the
resonances have broad widths for hybrids.
I suggest the following, i.e. W thresholds are above 3 GeV in either case.
7.5 GeV: E'min>2.0 GeV
6.5 GeV: E'min>2.0 GeV
For the upper E' I suggest to lower the numbers so that resonance width
are taken into account.
7.5GeV: E'max< 7.0 GeV
6.5GeV: E'max < 6.0 GeV
Thresholds may have to be adjusted for energy leakage.
Volker
On 11/9/18 11:16 AM, Valery Kubarovsky wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi All:
The scattered electron energy in the mail below differs by a factor of
4 from the table that was presented today (see attached screenshot). I
believe that we have to define the trigger parameters more precisely.
Regards,
Valery
------------------------------------------------------------------------
*From: *"Viktor Mokeev" <a class="moz-txt-link-rfc2396E" href="mailto:mokeev@jlab.org"><mokeev@jlab.org></a>
*To: *"clas12 rgk" <a class="moz-txt-link-rfc2396E" href="mailto:clas12_rgk@jlab.org"><clas12_rgk@jlab.org></a>
*Cc: *"Volker Burkert" <a class="moz-txt-link-rfc2396E" href="mailto:burkert@jlab.org"><burkert@jlab.org></a>, "annalisa dangelo"
<a class="moz-txt-link-rfc2396E" href="mailto:annalisa.dangelo@roma2.infn.it"><annalisa.dangelo@roma2.infn.it></a>, "Valery Kubarovsky" <a class="moz-txt-link-rfc2396E" href="mailto:vpk@jlab.org"><vpk@jlab.org></a>
*Sent: *Friday, November 9, 2018 10:22:06 AM
*Subject: *Range of the scattered electron energies
Dear Colleagues,
I computed the range of the scattered electron energies for Q^2=0
and at the W interval from 1.5 GeV (W_min) to 2.5 GeV (W_max),
which is the range of our physics interest.
For the beam energy of 7.5 GeV the energy range of the scattered
electrons should be from 4.64 GeV to 6.78 GeV.
For the beam energy of 6.4 GeV the energy range of the scattered
electrons should be from 3.54 GeV to 5.67 GeV.
The details of the evaluations are in the attached file.
Best Regards,
Victor
PS For Q^2>0.1 GeV^2 the actual value of Q^2 becomes comparable
with the \nu in the attached file and, therefore, should be taken
into account. In comparison with the photon point, actual Q^2
value should increase \nu and decrease the range of the scattered
electron energies.
</pre>
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