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<div class="moz-cite-prefix">Another eta decay of interest might be
eta-> 3pi0 (32.7%). Here the 2gamma's from each pi0 would
likely be within a single sector. So, one could just scan for
2gamma events in 3 different sectors to limit the combinatorics.</div>
<div class="moz-cite-prefix">Volker</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">On 7/7/19 2:50 PM, Francois-Xavier
Girod wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOKxh466-+41X5i+jcBYEqcKXorF3TNO2xwwfcOrbYUz4oSGyA@mail.gmail.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<div dir="ltr">I used simple angular cuts to enhance the eta
fraction
<div>angle gamma1 & gamma2 > 15 degrees</div>
<div>angle gamma1 & gamma2 > 30 degrees x ( 1 - E_{pi0} /
3 GeV )</div>
<div><br>
</div>
<div>In that case most photons come from different sectors</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, Jul 7, 2019 at 8:41 PM
Francois-Xavier Girod <<a href="mailto:fxgirod@jlab.org"
moz-do-not-send="true">fxgirod@jlab.org</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Dear Volker, Viktor
<div><br>
</div>
<div>I did not have a condition that photons are in the same
sector in my analysis</div>
<div><br>
</div>
<div>Best regards</div>
<div>FX</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, Jul 7, 2019 at
8:15 PM Viktor Mokeev <<a href="mailto:mokeev@jlab.org"
target="_blank" moz-do-not-send="true">mokeev@jlab.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div
id="gmail-m_647137711937009584gmail-m_2342884152962288573divtagdefaultwrapper"
style="font-size:12pt;color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif"
dir="ltr">
<p style="margin-top:0px;margin-bottom:0px">Thank you
Volker,</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px"> Evgeny
will prepare more detailed talk for the rg-k
Meeting.</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px">Best
Regards,</p>
<p style="margin-top:0px;margin-bottom:0px">
Victor<br>
</p>
</div>
<hr style="display:inline-block;width:98%">
<div
id="gmail-m_647137711937009584gmail-m_2342884152962288573divRplyFwdMsg"
dir="ltr"><font style="font-size:11pt" face="Calibri,
sans-serif" color="#000000"><b>From:</b> clas12_rgk
<<a href="mailto:clas12_rgk-bounces@jlab.org"
target="_blank" moz-do-not-send="true">clas12_rgk-bounces@jlab.org</a>>
on behalf of burkert <<a
href="mailto:burkert@jlab.org" target="_blank"
moz-do-not-send="true">burkert@jlab.org</a>><br>
<b>Sent:</b> Sunday, July 7, 2019 2:02:12 PM<br>
<b>To:</b> <a href="mailto:clas12_rgk@jlab.org"
target="_blank" moz-do-not-send="true">clas12_rgk@jlab.org</a><br>
<b>Subject:</b> Re: [clas12_rgk] Isupov results: 2
gamma Invariant mass</font>
<div> </div>
</div>
<div style="background-color:rgb(255,255,255)">
<div
class="gmail-m_647137711937009584gmail-m_2342884152962288573x_moz-cite-prefix">Hi
all,</div>
<div
class="gmail-m_647137711937009584gmail-m_2342884152962288573x_moz-cite-prefix">You
may be able to increase the eta yield by allowing
the 2-gammas in different sectors, otherwise the
acceptance for eta's will be limited as they have
much larger minimum opening angles than pi0's.</div>
<div
class="gmail-m_647137711937009584gmail-m_2342884152962288573x_moz-cite-prefix"><br>
</div>
<div
class="gmail-m_647137711937009584gmail-m_2342884152962288573x_moz-cite-prefix">Volker</div>
<div
class="gmail-m_647137711937009584gmail-m_2342884152962288573x_moz-cite-prefix"><br>
</div>
<div
class="gmail-m_647137711937009584gmail-m_2342884152962288573x_moz-cite-prefix">
On 7/7/19 1:57 PM, Viktor Mokeev wrote:<br>
</div>
<blockquote type="cite">
<div
id="gmail-m_647137711937009584gmail-m_2342884152962288573x_divtagdefaultwrapper"
dir="ltr"
style="font-size:12pt;color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif">
<p style="margin-top:0px;margin-bottom:0px">Dear
Colleagues,</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px">Evgeny
Isupov repeated selection of gvp
p--->pi^0p'---> gamma gamma p' events from
the same data set and with the same selection
criteria as FX did. His results for 2gamm inv
masses are consistent with FX.</p>
<p style="margin-top:0px;margin-bottom:0px"><br>
</p>
<p style="margin-top:0px;margin-bottom:0px"> Best
Regards,</p>
<p style="margin-top:0px;margin-bottom:0px">
Victor<br>
</p>
<br>
<br>
<div style="color:rgb(0,0,0)">
<hr style="display:inline-block;width:98%">
<div
id="gmail-m_647137711937009584gmail-m_2342884152962288573x_divRplyFwdMsg"
dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
Evgeny Isupov
<a
class="gmail-m_647137711937009584gmail-m_2342884152962288573x_moz-txt-link-rfc2396E"
href="mailto:e.l.isupov@gmail.com"
target="_blank" moz-do-not-send="true"><e.l.isupov@gmail.com></a><br>
<b>Sent:</b> Sunday, July 7, 2019 1:17 PM<br>
<b>To:</b> Viktor Mokeev<br>
<b>Subject:</b> 2 gamma Invariant mass</font>
<div> </div>
</div>
<div
class="gmail-m_647137711937009584gmail-m_2342884152962288573x_BodyFragment"><font
size="2"><span style="font-size:11pt">
<div
class="gmail-m_647137711937009584gmail-m_2342884152962288573x_PlainText">Hi
Victor Ivanovich,<br>
<br>
I used FX’s cuts and plotted 2 gamma
invariant mass.<br>
On the right you can see the same plot
only in log scale,<br>
we can clearly see the eta meson signal.<br>
<br>
<br>
Evgeny Isupov<br>
<br>
<br>
</div>
</span></font></div>
</div>
</div>
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<pre class="gmail-m_647137711937009584gmail-m_2342884152962288573x_moz-quote-pre">This body part will be downloaded on demand.</pre>
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