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Hello all, </div>
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attached you can find slides from Emrys, and the link to his overleaf document.</div>
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Rafo</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Sent:</b> Friday, July 25, 2025 11:08 AM<br>
<b>To:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Cc:</b> Joseph Rabara Bailey <josephrb@stanford.edu><br>
<b>Subject:</b> [EXTERNAL] Re: Bump hunting for X17</font>
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Hey Rafo,</div>
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Attached are the slides and below is the read only link to the overleaf for distribution:</div>
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<a id="LPlnk416457" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.overleaf.com_read_zpzknkkkqrmk-23bef878&d=DwMGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=RRU0wYsm58ED2zDanQADbuRK_U7eVkqEBSro5m4kcEU&m=PHs9hun2G924cnepd0pNVHLmNkeSNzsBCa9XFvqIDOl3fnGEQeTsTZ2tLGWp0iG-&s=NXlhZvWclajzHcChliMsgTgRvVtoWju2sC-ud71C4Tw&e=">https://www.overleaf.com/read/zpzknkkkqrmk#bef878</a></div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Sent:</b> Friday, July 25, 2025 6:34 AM<br>
<b>To:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Subject:</b> Re: Bump hunting for X17</font>
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Sounds good.</div>
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Rafo</div>
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<div id="x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Sent:</b> Friday, July 25, 2025 9:33 AM<br>
<b>To:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: Bump hunting for X17</font>
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Got it thanks! As a heads up, Joseph will be attending as well. </div>
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<div id="x_x_x_ms-outlook-mobile-signature">Get <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__aka.ms_o0ukef&d=DwMGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=RRU0wYsm58ED2zDanQADbuRK_U7eVkqEBSro5m4kcEU&m=1EMTKlkI6iBRZc4YNsNMbYDiwEjz5msE0EYURN4_5EVyE14VfNfnu-GIYLl4ojQo&s=29Xw4XSqn4GF1c0JiysExoxiMPBnTg9KcWSUlZvF4t8&e=">
Outlook for iOS</a></div>
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<div id="x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Sent:</b> Friday, July 25, 2025 6:32:46 AM<br>
<b>To:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Subject:</b> Re: Bump hunting for X17</font>
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Hi Emrys,</div>
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sorry forgot to send,</div>
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I just forwarded you the e-mail.</div>
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let me know, if you didn't get.</div>
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Rafo</div>
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<div id="x_x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Sent:</b> Friday, July 25, 2025 9:30 AM<br>
<b>To:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: Bump hunting for X17</font>
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Hey Rafo, what’s the meeting link? </div>
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<div id="x_x_x_x_x_ms-outlook-mobile-signature">Get <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__aka.ms_o0ukef&d=DwMGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=RRU0wYsm58ED2zDanQADbuRK_U7eVkqEBSro5m4kcEU&m=NiNpYaddd5mEMYv8CLXIPd2nkRyImbZtapYqv5KFSAnjZmbSXoD7zIEUh8w-2XCH&s=pazmM41yLhfnF-wsg0UZUqpAHrk5DOe3QpmfkHxqTgI&e=">
Outlook for iOS</a></div>
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<div id="x_x_x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Sent:</b> Monday, July 21, 2025 12:10:09 PM<br>
<b>To:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Subject:</b> Re: Bump hunting for X17</font>
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very good, I will forward you the meeting call, usually it is on Thursday.</div>
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Rafo</div>
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<div id="x_x_x_x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Sent:</b> Monday, July 21, 2025 12:21 PM<br>
<b>To:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: Bump hunting for X17</font>
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This Friday should work!</div>
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Joseph was able to get p-values for the spectra I sent him, so once we hash out the full infrastructure I will remake the spectra to omit the jitter.</div>
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Best, </div>
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Emrys </div>
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<div id="x_x_x_x_x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Sent:</b> Friday, July 18, 2025 8:42 AM<br>
<b>To:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Subject:</b> Re: Bump hunting for X17</font>
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Hi Emrys,</div>
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Ok, if next Friday, July 25 works for you, that would be good if you could make about 20 min presentation with potentially 10 min questions,</div>
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Then for the collaboration meeting you could prepare more detailed presentation with longer time slot.</div>
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The meeting time is 10:am EST, for you it will be 7:00 am.</div>
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Please let me know, if this works for you.</div>
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Rafo</div>
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<div id="x_x_x_x_x_x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Sent:</b> Monday, July 7, 2025 2:22 PM<br>
<b>To:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: Bump hunting for X17</font>
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Hi Rafo,</div>
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I hope you're doing well! I ended up becoming quite ill with a staph infection last week and was out of commission. I have significantly improved, and am just about recovered. </div>
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Regarding the September date: </div>
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This would be fine, though it might be a good idea for me to have a brief presentation to the collaboration before teh september meeting. I wouldn't want to miss an opportunity for Joseph to work through the majority of the X17 bumphunter pipeline necessary
as his summer project. To that end, I have a few questions that can help shape the infrastructure:</div>
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<div role="presentation" class="x_x_x_x_x_x_x_x_x_elementToProof">Do you have a sample spectrum we can use as a starting place. </div>
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<div role="presentation" class="x_x_x_x_x_x_x_x_x_elementToProof">I went ahead and made two plots (attached) where I threw a random background using the polynomial from your slides and injected signal above 17MeV and 40 MeV. </div>
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<div role="presentation" class="x_x_x_x_x_x_x_x_x_elementToProof">We could just use this as a starting place </div>
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<div role="presentation" class="x_x_x_x_x_x_x_x_x_elementToProof">Note the +- 2 sigma band is somewhat arbitrary and more of a place holder </div>
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<div role="presentation" class="x_x_x_x_x_x_x_x_x_elementToProof">Do you have a function for the mass resolution? This would be helpful in the signal model and determing appropriate width for gaussian signal model. I am assuming that the signal shpae would
be narrower than the mass resolution. </div>
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<div role="presentation" class="x_x_x_x_x_x_x_x_x_elementToProof">Have you a function for the radiative fraction? This would be for determining coupling after determing upper limits on signal yield.</div>
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Let me know if you'd like to zoom 1-1 sometime this week!</div>
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Best,</div>
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Emrys </div>
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<div id="x_x_x_x_x_x_x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Sent:</b> Friday, June 27, 2025 12:16 PM<br>
<b>To:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Subject:</b> Re: Bump hunting for X17</font>
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Hi Emrys,</div>
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no worries, I hope you get fully recovered soon.</div>
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Today I discussed this in the general meeting about the best time for you to present.</div>
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Next Friday is July 4th, and the week after is CLAS collaboration meeting, where many of X17 members will attend.</div>
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I got suggestions that it might be better if you could present this in the coming PRad/X17 collaboration meeting which tentatively will on Sep.12.</div>
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I also think that at the collaboration meeting will be better, as you will have dedicated time slot 30-40 minutes (or whatever time you would like) + discussion.</div>
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During the weekly meeting as there are other discussion topics as well, there might not be enough time for a proper discussion.</div>
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Please let me know, if early Sep (most probably Sep. 12) works for you?</div>
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Rafo</div>
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<div id="x_x_x_x_x_x_x_x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Sent:</b> Thursday, June 26, 2025 2:40 PM<br>
<b>To:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: Bump hunting for X17</font>
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Hi Rafo, </div>
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Sorry for the delay in responding! </div>
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I ended up returning from Texas and immediately testing positive with covid, so I am just now past the worst of the symptoms. </div>
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Regarding a presentation: I could do this coming Tuesday at 5:00 PM SLAC Time, if necessary I could also do the general meeting next week. </div>
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As a heads up, I have been mentoring Joseph Bailey, an advanced undergraduate student at Stanford, on bumphunting and he would be the one taking lead on developing the X17 bumphunting pipeline as a summer project. As some first steps he has already worked through
a <span style="font-weight:600">pyBumpHunter </span>github repository and has made impressive progress in a short amount of time. Im helping him understand the underlying physics behind the X17 experiment and will guide him through determining coupling strength
from a spectrum. Joseph is quite talented and I think offers a good compromise for me to maintain my primary effort on HPS actionables.</div>
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As a rough estimate for what I would present at an upcoming meeting:</div>
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<div class="x_x_x_x_x_x_x_x_x_x_x_elementToProof" role="presentation">HPS Primary Bumphunt Methodology</div>
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<div class="x_x_x_x_x_x_x_x_x_x_x_elementToProof" role="presentation">I would describe my resonance search and the tools I have developed with functional forms</div>
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<div class="x_x_x_x_x_x_x_x_x_x_x_elementToProof" role="presentation">HPS Bumphunt using ML Gaussian Process Regression</div>
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<div class="x_x_x_x_x_x_x_x_x_x_x_elementToProof" role="presentation">I would briefly summarize the progress of the two students I have been working with on developng a machine learning bump hunt toolkit </div>
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<div class="x_x_x_x_x_x_x_x_x_x_x_elementToProof" role="presentation">Anticipated X17 Bumphunt workflow and deliverables</div>
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<div class="x_x_x_x_x_x_x_x_x_x_x_elementToProof" role="presentation">I would go through anticipated methodology and timeline for the X17 Bumphunt as I see it</div>
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<div class="x_x_x_x_x_x_x_x_x_x_x_elementToProof" role="presentation">Bkg only</div>
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<div class="x_x_x_x_x_x_x_x_x_x_x_elementToProof" role="presentation">Injected signal scans and upper limits on signal yield</div>
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<div class="x_x_x_x_x_x_x_x_x_x_x_elementToProof" role="presentation">Calculating upper limits on coupling </div>
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Thanks so much for this opportunity!</div>
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Let me know if next Tuesday or next Friday works best.</div>
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Best,</div>
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Emrys </div>
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<div id="x_x_x_x_x_x_x_x_x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Sent:</b> Friday, June 13, 2025 12:45 PM<br>
<b>To:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Subject:</b> Re: Bump hunting for X17</font>
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Hi Emrys,</div>
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no rush at all 🙂 sometime within a month from now would be perfectly fine.</div>
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I just realized that our weekly general meeting (analogous of HPS Wednesday meeting) might be too early for you. We meet on Fridays 10:00 am EST, which is 7:00 am for you.</div>
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We also meet on Monday's or Tuesday's at 20:00 (EST) to discuss more analysis/simulations staff, this is 17:00 SLAC time.</div>
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Perhaps the the 2<sup>nd</sup> option would work better for you.</div>
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Again no urgency in this,</div>
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for example if July 1<sup>st</sup> (Tuesday) 20:00 (17:00 SLAC time) works for you it potentially can be a good time.</div>
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Otherwise let me know which day you prefer.</div>
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I will check with the meeting organizer as well, to make sure there are not many other items in the agenda for that day.</div>
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Rafo</div>
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<div id="x_x_x_x_x_x_x_x_x_x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Sent:</b> Thursday, June 12, 2025 7:46 PM<br>
<b>To:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: Bump hunting for X17</font>
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Hi Rafo!</div>
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Thanks for following up.</div>
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I agree that my HPS bump hunt takes priority. However, as I am solely focused on bumphunting using a few different approaches, I believe my experience will translate into a clean X17 Bumphunt.</div>
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I would be happy to give a presentation at an X17 weekly meeting. I am traveling to Texas next week to visit my grandfather, but perhaps I could present the following week? If that is too late, maybe late next week depending on when the weekly meetings are.
Let me know what would work best.</div>
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Best,</div>
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Emrys </div>
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<div id="x_x_x_x_x_x_x_x_x_x_x_x_x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Rafayel Paremuzyan <rafopar@jlab.org><br>
<b>Sent:</b> Thursday, June 12, 2025 6:24 AM<br>
<b>To:</b> Emrys Peets <epeets@stanford.edu><br>
<b>Subject:</b> Bump hunting for X17</font>
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Hi Emrys,</div>
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Thanks again for offering to help with BumpHunting on X17 experiment.</div>
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I Just would like to mention again that we don't want you to get distracted from your main duties at HPS, and it is fine with your supervisor.</div>
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Given this, perhaps as a first step would be to give a presentation in one of weekly X17 meetings about your BumpHunting technique, and get introduced to the collaboration.</div>
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Please let me know, if this works for you.</div>
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Rafo</div>
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