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A gentle reminder of today's seminar. <br>
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<font><font color="#444444"><span style="font-size: 10pt; line-height: normal;"><span style="line-height: normal; font-size: 10pt;"><span style="line-height: normal;"><b>Swagat Saurav Mishra</b></span></span></span></font><font color="#222222"><span style="font-size: 10pt; line-height: normal;">,</span></font></font></p>
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<span style="font-size: 10pt; line-height: normal;"></span><span style="font-size:12pt; line-height:normal"></span><font color="#20124d"><span style="font-size: 10pt; line-height: normal;">Postdoctoral Research Associate</span></font></p>
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<span style="font-size:12pt; line-height:normal"></span><font color="#20124d"><span style="font-size: 10pt; line-height: normal;">Particle Cosmology Group, </span></font></p>
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<span style="font-size: 10pt; line-height: normal;"></span><span style="font-size:12pt; line-height:normal"></span><font color="#20124d"><span style="font-size: 10pt; line-height: normal;">Centre for Astronomy and Particle Theory,</span></font></p>
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<span style="font-size: 10pt; line-height: normal;"></span><span style="font-size:12pt; line-height:normal"></span><font color="#20124d"><span style="font-size: 10pt; line-height: normal;">University of Nottingham, Nottingham NG7 2RD, UK.</span></font></p>
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<span style="font-size: 10pt; line-height: normal;"></span><span style="font-size:12pt; line-height:normal"></span><font color="#000000"><span style="font-size: 10pt; line-height: normal;">Website</span></font><font color="#20124d"><span style="font-size: 10pt; line-height: normal;">: </span><a href="https://swagatam18.wordpress.com/" target="_blank" style="color:rgb(17,85,204)"><span style="font-size: 10pt; line-height: normal;">https://swagatam18.wordpress.com/</span></a><span style="font-size: 10pt; line-height: normal;"> </span></font></p>
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<span style="font-size: 10pt; line-height: normal;"></span><font size="3"><span style="font-size: 12pt; line-height: normal;"></span></font><font color="#000000"><span style="font-size: 10pt; line-height: normal;">Research Link</span></font><font color="#20124d"><span style="font-size: 10pt; line-height: normal;">:</span><a href="https://inspirehep.net/authors/1517353" target="_blank" style="color: rgb(17, 85, 204);"><span style="font-size: 10pt; line-height: normal;">https://inspirehep.net/authors/1517353</span></a></font></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Particles <particles-bounces@lists.nottingham.ac.uk> on behalf of Swagat Mishra <Swagat.Mishra@nottingham.ac.uk><br>
<b>Sent:</b> 10 June 2024 09:09<br>
<b>To:</b> astro@nottingham.ac.uk <astro@nottingham.ac.uk>; particles@nottingham.ac.uk <particles@nottingham.ac.uk>; maths-quantum-gravity-group@lists.nottingham.ac.uk <maths-quantum-gravity-group@lists.nottingham.ac.uk>; O365-Gravity Laboratory <o365-gravitylaboratory@UniofNottm.onmicrosoft.com><br>
<b>Cc:</b> Poulami Dutta Roy <sonai.duttaroy@gmail.com>; Ella Batchelor (staff) <ppzeb1@exmail.nottingham.ac.uk><br>
<b>Subject:</b> [Particles] Particle Cosmology Seminar on coming Friday: Poulami Dutta Roy, CMI, India</font>
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Dear All, </div>
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We have an in-person seminar on the coming Friday (14<sup>th</sup> June) by Poulami Dutta Roy from Chennai mathematical institute (CMI), India. This will be the last seminar for this term.</div>
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<b>Venue:</b> A113 (2 pm on Friday 14th June)</div>
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<span style="color:rgb(59,32,77)"><b>Title:</b></span> <b><i>Parametrized tests of GR: Extension to 4PN order and Principal Component Analysis</i></b></div>
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<span style="color:rgb(59,32,77)"><b>Abstract:</b></span> Parametrized tests of post-Newtonian (PN) theory have been very efficient in testing GR in the inspiral phase of compact binary dynamics. In this test, one introduces null-valued deformation coefficients
at each PN order in the inspiral phase, and their consistency with zero is assessed using gravitational wave data. In the first half of the talk, we will discuss the recently computed 4PN and 4.5PN inspiral phase terms that carry information about new physical
effects like the tail-of-memory, spin-quadrupolar tails and quartic-tail effects and the extension of single-parameter test of GR to these orders. We introduce four new deformation parameters at these PN orders and compute the bounds on them through the Fisher
analysis for the current-generation detectors such as LIGO/Virgo, next-generation (XG) detectors such as Cosmic Explorer/Einstein Telescope and LISA. Gravitational waves from supermassive BHs observed in LISA provide the tightest projected constraints ranging
from O(10−4 −10−2 ) for the four different parameters. In the second segment, we focus on multi-parameter tests, i.e., simultaneous estimation of deformation parameters occurring at all PN orders and understand the associated problems due to their correlations.
One possible resolution is shifting to a suitable basis obtained through Principal Component Analysis (PCA), which is the best-measured orthogonal linear combination of the original deformation parameters. We performed an extensive study of zero-noise GR and
non-GR injections, that highlights the efficiency of PCA over the usual parametrized test in constraining GR deviations. Our study, therefore, highlights the advancements in parametrized tests to probe consistency with GR through current and future gravitational
wave observations.</div>
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Link to join online:</div>
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With regards,</div>
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-Swagat</div>
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<span style="font-size:10pt; color:rgb(68,68,68); line-height:normal"><b>Swagat Saurav Mishra</b></span><span style="font-size:10pt; line-height:normal">,</span></p>
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<span style="font-size:10pt; color:rgb(32,18,77); line-height:normal">Postdoctoral Research Associate</span></p>
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<span style="font-size:10pt; color:rgb(32,18,77); line-height:normal">Particle Cosmology Group, </span></p>
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<span style="font-size:10pt; color:rgb(32,18,77); line-height:normal">Centre for Astronomy and Particle Theory,</span></p>
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<span style="font-size:10pt; color:rgb(32,18,77); line-height:normal">University of Nottingham, Nottingham NG7 2RD, UK.</span></p>
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<span style="font-size:10pt; color:rgb(0,0,0); line-height:normal">Website</span><span style="font-size:10pt; color:rgb(32,18,77); line-height:normal">:
</span><span style="font-size:10pt; color:rgb(17,85,204); line-height:normal"><a href="https://swagatam18.wordpress.com/" data-auth="NotApplicable" id="OWA3d15229e-72f3-3da6-a6c8-372a66a11d66" class="x_OWAAutoLink" style="color:rgb(17,85,204); margin-top:0px; margin-bottom:0px">https://swagatam18.wordpress.com/</a></span><span style="font-size:10pt; color:rgb(32,18,77); line-height:normal"> </span></p>
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<span style="font-size:10pt; color:rgb(0,0,0); line-height:normal">Research Link</span><span style="font-size:10pt; color:rgb(32,18,77); line-height:normal">:</span><span style="font-size:10pt; color:rgb(17,85,204); line-height:normal"><a href="https://inspirehep.net/authors/1517353" data-auth="NotApplicable" id="OWA392bfb7c-9964-7e6f-dd27-247dd589635e" class="x_OWAAutoLink" style="color:rgb(17,85,204); margin-top:0px; margin-bottom:0px">https://inspirehep.net/authors/1517353</a></span></p>
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