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<span style="font-size: 12pt;">Dear Colleague,</span><br>
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We invite you to participate in the "<b class="">3rd Proton Mass Workshop: Origins and Perspective</b>" which will be held remotely on
<b class="">January 14-16, 2021</b>. The workshop will explore questions about the origin of hadron masses and confinement within Quantum Chromodynamics. If you are interested in participating please register at <br class="">
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<a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__indico.phy.anl.gov_e_mass2021&d=DwMGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=K4HRMH6TVb_Js20bQSfGOg&m=FAPzbnIzJ6X-ib_ikPA6SnITBoJoTLOwazo6dWuIi6M&s=8xYDBAz4zpAAzoeSyBERQnuT4LwXZpKWTkyxt5yHtSc&e=" class="">https://indico.phy.anl.gov/e/mass2021</a><br class="">
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Participation will be via Bluejeans, and all registered participants will receive the meeting link and password via email on
<b class="">Tuesday 12 January 2021</b>.<br class="">
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A goal of the workshop is to place on firm ground well-posed fundamental questions that can be addressed worldwide with measurements of well-defined observables, including at Jefferson Lab and the EIC. The question "How does the mass of the nucleon arise" is
one of the triad of National Academy of Science questions supporting the EIC science case. The answer to this question has far-reaching consequences for our deep understanding of the universe's visible matter and perhaps beyond. Since, as we look to nature
for unique confined systems where most of the mass is provided by the energy of its fields, two examples come into mind, protons and black holes.<br class="">
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We also invite participants to contribute a few slides that articulate your perspective on topics related to this workshop, perhaps by addressing one of the posed questions or providing a new question to consider. These slides will be posted to the workshop
website and time permitting be selected for <b class="">5 minute presentations</b> during the discussion sessions. Please send these contributions to Paula Dahlberg <<a href="mailto:pdahlberg@anl.gov" class="">pdahlberg@anl.gov</a>>, preferably by
<b class="">Monday 11 January 2021</b>.<br class="">
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By the end of the workshop, we would like to converge on a few fundamental science questions and identify corresponding observables to be measured to add to our understanding of the proton mass and confinement. To make the discussions productive and efficient,
we'll do our best to post the invited presentations a week before the start of the workshop for every participant to engage in the discussion and formulation of the critical questions. We aim at producing a community white paper on the subject of this workshop,
as it pertains to the vast majority of the visible matter in the universe.<br class="">
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Looking forward to your participation.<br class="">
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Happy Holidays!<br class="">
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<b class="">The Organizers:</b><br class="">
Ian Cloët (Argonne National Laboratory)<br class="">
Xiangdong Ji (University of Maryland)<br class="">
Zein-Eddine Meziani (Argonne National Laboratory)<br class="">
Jianwei Qiu (Jefferson Lab)<br class="">
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