<div dir="ltr">Dear Valery, all<div><br></div><div>I can give the following numbers: for the selection of electron momentum > 2 GeV/c the minimum energy deposited in PCAL+ECAL is 425 MeV at 2.5 sigma selection below mean value. The same value for PCAL is 220 MeV</div><div><br></div><div>I am not sure which other numbers you need for PCAL and ECAL thresholds. Please let me know</div><div><br></div><div>Best regards</div><div>FX</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Nov 9, 2018 at 11:56 AM Valery Kubarovsky <<a href="mailto:vpk@jlab.org">vpk@jlab.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:arial,helvetica,sans-serif;font-size:12pt;color:#000000"><div>Hi All:</div><div>Please estimate the desired thresholds for PCAL+ECAL energy for all 4 thresholds.</div><div>Thanks,</div><div>Valery</div><div><br></div><div><br></div><hr id="m_-7352567069147429017zwchr"><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"><b>From: </b>"Volker Burkert" <<a href="mailto:burkert@jlab.org" target="_blank">burkert@jlab.org</a>><br><b>To: </b>"Valery Kubarovsky" <<a href="mailto:vpk@jlab.org" target="_blank">vpk@jlab.org</a>>, "Viktor Mokeev" <<a href="mailto:mokeev@jlab.org" target="_blank">mokeev@jlab.org</a>><br><b>Cc: </b>"clas12 rgk" <<a href="mailto:clas12_rgk@jlab.org" target="_blank">clas12_rgk@jlab.org</a>>, "annalisa dangelo" <<a href="mailto:annalisa.dangelo@roma2.infn.it" target="_blank">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></div><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"><div class="m_-7352567069147429017moz-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><blockquote><div style="font-family:arial,helvetica,sans-serif;font-size:12pt;color:#000000"><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="m_-7352567069147429017zwchr"><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"><b>From: </b>"Viktor Mokeev" <a class="m_-7352567069147429017moz-txt-link-rfc2396E" href="mailto:mokeev@jlab.org" target="_blank"><mokeev@jlab.org></a><br> <b>To: </b>"clas12 rgk" <a class="m_-7352567069147429017moz-txt-link-rfc2396E" href="mailto:clas12_rgk@jlab.org" target="_blank"><clas12_rgk@jlab.org></a><br> <b>Cc: </b>"Volker Burkert" <a class="m_-7352567069147429017moz-txt-link-rfc2396E" href="mailto:burkert@jlab.org" target="_blank"><burkert@jlab.org></a>, "annalisa dangelo" <a class="m_-7352567069147429017moz-txt-link-rfc2396E" href="mailto:annalisa.dangelo@roma2.infn.it" target="_blank"><annalisa.dangelo@roma2.infn.it></a>, "Valery Kubarovsky" <a class="m_-7352567069147429017moz-txt-link-rfc2396E" href="mailto:vpk@jlab.org" target="_blank"><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></div><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"> 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></blockquote></div></div></blockquote><p><br></p><br></blockquote></div></div></div>_______________________________________________<br>
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