<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="blue" vlink="purple" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Charles, Pawel et al,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It turns out that a friend of mine, Ashutosh Kotwal from DUKE had (this past Fall) sent me some information on some of his ideas for tracking high multiplicities in silicon detectors. I only this past couple of days got around to reading
his NIM paper. It seems to me that it justifies your/our claim that the 6 layer CORE silicon tracker will find the tracks we seek. The environment he postulates is that of HL-LHC. I think that the EIC environment is relatively benign in comparison to HL-LHC.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Ashutosh refers to the paper which I have read an idealized version which was published in NIM. <o:p></o:p></p>
<p class="MsoNormal"><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__webhome.phy.duke.edu_-7Ekotwal_trackTrigger.pdf&d=DwMFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=FsrBWy4mPEu16BvMbkwICw&m=q6lEO0xcNlH9fsw7_gZsbOH3f6AnR8iM8vxsXhNRaXcHzmVsizr84dCapcju1AQn&s=o3ReupPkgcUt0PpaTChVhrA0-TE-2fOZxjyzmkUyXIA&e=">http://webhome.phy.duke.edu/~kotwal/trackTrigger.pdf</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">He says that here is another paper in the works, describing an integrated circuit implementation. It will prove that the concept actually works. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Ashutosh’s real aim is to seek and find disappearing tracks (indicating decays involving Dark Matter) and he points to:<o:p></o:p></p>
<p class="MsoNormal">“ …. a solution for the problem of track triggering at the LHC. See <o:p></o:p></p>
<p class="MsoNormal"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__physics.duke.edu_news_capturing-2Dsecrets-2Duniverse-2Dsilicon-2Dchip&d=DwMFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=FsrBWy4mPEu16BvMbkwICw&m=q6lEO0xcNlH9fsw7_gZsbOH3f6AnR8iM8vxsXhNRaXcHzmVsizr84dCapcju1AQn&s=kBSf24PgLCXaE4ESwf6hRBqt-qmFbxitUUznSf3DU9g&e=">https://physics.duke.edu/news/capturing-secrets-universe-silicon-chip</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">where there is a link to my paper in a Nature journal<o:p></o:p></p>
<p class="MsoNormal"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__www.nature.com_articles_s41598-2D021-2D97848-2D6&d=DwMFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=FsrBWy4mPEu16BvMbkwICw&m=q6lEO0xcNlH9fsw7_gZsbOH3f6AnR8iM8vxsXhNRaXcHzmVsizr84dCapcju1AQn&s=OhxzA5iNyRRpEYaS2SAWGuaOU0_UkbKpBxjZQPOY8LQ&e=">https://www.nature.com/articles/s41598-021-97848-6</a><o:p></o:p></p>
<p class="MsoNormal">This paper describes a more advanced algorithm under realistic conditions. “<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Mont<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
</body>
</html>