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<span class="normaltextrun"><b><span style="font-size:26.0pt;font-family:"Times New Roman",serif;color:#006FC0">Physics & Astronomy Colloquium</span></b></span><o:p></o:p></p>
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<i><span style="font-size:26.0pt;font-family:"Times New Roman",serif">Somewhere Beyond B-modes: Probing Lorentz Invariance Violation with Cosmic Microwave Background Polarization</span></i><span style="font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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</span><span class="normaltextrun"><b><i><span style="font-size:28.0pt;font-family:"Times New Roman",serif">Dr. Brian Keating</span></i></b></span><o:p></o:p></p>
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<span class="normaltextrun"><span style="font-size:26.0pt;font-family:"Times New Roman",serif">UC San Diego<o:p></o:p></span></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span class="normaltextrun"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">Abstract: Researchers using data from the Planck satellite, a spacecraft measuring the cosmic microwave
background (CMB), claimed observing a hint (at 99.2 percent confidence) of parity violation on cosmic scales. If confirmed, this result would have profound implications, not just for cosmology but for all of fundamental physics. In this lecture, I will review
the basis for the claimed hint of so-called ‘Chern-Simons’ cosmic birefringence. I will outline steps scientists are taking to definitively confirm (or falsify) this provocative claim using future CMB experiments like the Simons Array, the Simons Observatory,
as well as optical polarization data from unique cosmic ‘lampposts’ (quasars and AGN) using small (0.5-meter class) telescopes.</span></span><o:p></o:p></p>
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<span class="normaltextrun"><b><span style="font-size:18.0pt;font-family:"Times New Roman",serif;color:#2F5496">Thursday, January 19th , 2023<o:p></o:p></span></b></span></p>
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<span class="normaltextrun"><b><span style="font-size:18.0pt;font-family:"Times New Roman",serif;color:#2F5496">3:40 PM in Winston Chung Hall (Room 138)</span></b></span><o:p></o:p></p>
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<span class="normaltextrun"><b><span style="font-size:18.0pt;font-family:"Times New Roman",serif;color:#2F5496">Coffee will be served at 3:10 PM in the Barkas Lounge (3049 Physics)</span></b></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Heather McDermott</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Travel & Events Coordinator</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Physics & Astronomy Dept.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">UC Riverside</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">3401 Watkins Dr.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Riverside, CA 92521</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">P: 951-827-5330</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Available via Zoom Link:
</span><a href="https://ucr.zoom.us/my/heathermcdermott"><span style="font-size:10.5pt;background:white">https://ucr.zoom.us/my/</span><span style="font-size:11.0pt;background:white">heathermcdermott</span></a><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
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