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<div class="moz-cite-prefix">Valery,<br>
<br>
The 2.5 GeV threshoild came out of the blue during that meeting,
In the proposal we discuss surveys going to much higher mass. It
would not be justified to lower the proposal requirements. <br>
<br>
Here is an excerpt of the abstract in the proposal for hybrid
baryons:<br>
<br>
<b>"The experiment will use longitudinally polarized electron
beams of 6.6 GeV and 8.8 GeV to</b><b><br>
</b><b>cover the range of invariant mass W up to 3 GeV and Q2 from
0.05 GeV2 to 2 GeV2."</b><br>
<br>
Please lets not mess with the goals of the proposal.<br>
<br>
<br>
Volker<br>
<br>
<br>
<br>
to On 11/9/18 2:05 PM, Valery Kubarovsky wrote:<br>
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cite="mid:1639573521.12330473.1541790333754.JavaMail.zimbra@jlab.org">
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<div>Hi All:</div>
<div><br data-mce-bogus="1">
</div>
<div>E' energy threshold suggested:</div>
<div><br data-mce-bogus="1">
</div>
<div>Victor 3.54 GeV - exact energy limit </div>
<div>Volker 2.00 GeV - includes correction for the resonance's
widths.</div>
<div><br data-mce-bogus="1">
</div>
<div>I think that the 2 GeV correction is too much for the
resonance's widths.</div>
<div>I suggest to have more realistic estimations. If trigger
rate will permit we can always lower the calorimeter energy
cut. I don't think that it will be the case and we will decide
any way what to do: make a stronger trigger cuts or go down
with the beam current. Let us establish the trigger limits
that is absolutely necessary. Later on we can adjust it.</div>
<div> </div>
<div>Regards,</div>
<div>Valery</div>
<div><br data-mce-bogus="1">
</div>
<div> </div>
<div><br data-mce-bogus="1">
</div>
<div><br>
</div>
<hr id="zwchr" data-marker="__DIVIDER__">
<div data-marker="__HEADERS__">
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#1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"
data-mce-style="border-left: 2px solid #1010FF; margin-left:
5px; padding-left: 5px; color: #000; font-weight: normal;
font-style: normal; text-decoration: none; font-family:
Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From: </b>"Volker
Burkert" <a class="moz-txt-link-rfc2396E" href="mailto:burkert@jlab.org"><burkert@jlab.org></a><br>
<b>To: </b>"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><br>
<b>Cc: </b>"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><br>
<b>Sent: </b>Friday, November 9, 2018 11:51:55 AM<br>
<b>Subject: </b>Re: Range of the scattered electron
energies<br>
</blockquote>
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Helvetica,Arial,sans-serif; font-size: 12pt;">
<div class="moz-cite-prefix">I think Victor calculated a
sharp threshold without considering the resonances have
broad widths for hybrids. <br>
<br>
I suggest the following, i.e. W thresholds are above 3 GeV
in either case. <br>
<br>
7.5 GeV: E'min>2.0 GeV<br>
6.5 GeV: E'min>2.0 GeV<br>
<br>
For the upper E' I suggest to lower the numbers so that
resonance width are taken into account.<br>
7.5GeV: E'max< 7.0 GeV <br>
6.5GeV: E'max < 6.0 GeV <br>
<br>
Thresholds may have to be adjusted for energy leakage. <br>
<br>
Volker<br>
<br>
<br>
<br>
On 11/9/18 11:16 AM, Valery Kubarovsky wrote:<br>
</div>
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cite="mid:1415632193.11796983.1541780200460.JavaMail.zimbra@jlab.org">
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data-mce-style="font-family: arial,helvetica,sans-serif;
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<div>Hi All:</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Valery</div>
<div><br>
</div>
<div><br>
</div>
<hr id="zwchr">
<div>
<blockquote style="border-left:2px solid
#1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"
data-mce-style="border-left: 2px solid#1010FF;
margin-left: 5px; padding-left: 5px; color: #000;
font-weight: normal; font-style: normal;
text-decoration: none; font-family:
Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From:
</b>"Viktor Mokeev" <a
class="moz-txt-link-rfc2396E"
href="mailto:mokeev@jlab.org" target="_blank"
data-mce-href="mailto:mokeev@jlab.org"
moz-do-not-send="true"><mokeev@jlab.org></a><br>
<b>To: </b>"clas12 rgk" <a
class="moz-txt-link-rfc2396E"
href="mailto:clas12_rgk@jlab.org" target="_blank"
data-mce-href="mailto:clas12_rgk@jlab.org"
moz-do-not-send="true"><clas12_rgk@jlab.org></a><br>
<b>Cc: </b>"Volker Burkert" <a
class="moz-txt-link-rfc2396E"
href="mailto:burkert@jlab.org" target="_blank"
data-mce-href="mailto:burkert@jlab.org"
moz-do-not-send="true"><burkert@jlab.org></a>,
"annalisa dangelo" <a class="moz-txt-link-rfc2396E"
href="mailto:annalisa.dangelo@roma2.infn.it"
target="_blank"
data-mce-href="mailto:annalisa.dangelo@roma2.infn.it"
moz-do-not-send="true"><annalisa.dangelo@roma2.infn.it></a>,
"Valery Kubarovsky" <a
class="moz-txt-link-rfc2396E"
href="mailto:vpk@jlab.org" target="_blank"
data-mce-href="mailto:vpk@jlab.org"
moz-do-not-send="true"><vpk@jlab.org></a><br>
<b>Sent: </b>Friday, November 9, 2018 10:22:06 AM<br>
<b>Subject: </b>Range of the scattered electron
energies<br>
</blockquote>
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<div>
<blockquote style="border-left:2px solid
#1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"
data-mce-style="border-left: 2px solid#1010FF;
margin-left: 5px; padding-left: 5px; color: #000;
font-weight: normal; font-style: normal;
text-decoration: none; font-family:
Helvetica,Arial,sans-serif; font-size: 12pt;"> Dear
Colleagues,<br>
<br>
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.<br>
<br>
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.<br>
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.<br>
<br>
The details of the evaluations are in the attached
file.<br>
<br>
Best Regards,<br>
Victor<br>
<br>
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.<br>
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