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  <title>Dr.</title>
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  <organization>Cinvestav</organization>
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<title>XXI Mexican School on Particles and Fields 2026</title>
<description>&lt;p style="text-align:justify"&gt;The &lt;strong&gt;XXI Mexican School on Particles and Fields&lt;/strong&gt; takes place from &lt;strong&gt;October 19th to 23rd, 2026&lt;/strong&gt;, in the city of Puebla, Puebla, M&amp;eacute;xico. The format of the school is&amp;nbsp;such that the morning sessions are devoted to theoretical and experimental reviews, whereas parallel thematic sessions shall be held in the afternoons. All the reviews and seminars are delivered by experts of international prestige on subjects which are of current interest to the global scientific community and are also actively pursued within M&amp;eacute;xico. ​&lt;/p&gt;

&lt;p style="text-align:justify"&gt;In order to equip graduate students and attending postdocs with the necessary tools to perform fully in the school, courses of interest are taught, with English being the language of instruction. An informal and friendly atmosphere is encouraged during the courses so that the students can overcome their inhibitions and actively participate in the discussions. ​&lt;/p&gt;

&lt;p style="text-align:justify"&gt;&lt;em&gt;&lt;u&gt;&lt;strong&gt;Organizing Committee&lt;/strong&gt;&lt;/u&gt;&lt;/em&gt;&lt;/p&gt;

&lt;p style="text-align:justify"&gt;Dr. Isabel Pedraza Morales (President DPyC-SMF) [BUAP]&lt;br /&gt;
Dr. Humberto G. Maury Cuna (Vice-President DPyC-SMF)&amp;nbsp;[UGTO]&lt;/p&gt;

&lt;p style="text-align:justify"&gt;&lt;em&gt;&lt;u&gt;&lt;strong&gt;Local Organizing Committee&lt;/strong&gt;&lt;/u&gt;&lt;/em&gt;&lt;/p&gt;

&lt;p style="text-align:justify"&gt;Dr. Haydee Hern&amp;aacute;ndez [BUAP]&lt;br /&gt;
Dr. Arturo Fern&amp;aacute;ndez [BUAP]&lt;br /&gt;
Dr. Humberto Salazar [BUAP]&lt;br /&gt;
Dr. Olga F&amp;eacute;lix Beltr&amp;aacute;n [BUAP]&lt;/p&gt;
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 <name>Puebla</name>
 <address>1. Edificio Carolino, Calle 4 Sur 104, Centro, Puebla, Puebla.
2. Ciudad Universitaria 2, Calle Heberto Rodríguez N°119, Colonia San Antonio Toluquilla, C.P. 72960, San Pedro Zacachimalpa, Puebla</address>
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<startDate>2026-10-19T07:30:00</startDate>
<endDate>2026-10-23T19:30:00</endDate>
<creationDate>2026-07-01T10:52:23</creationDate>
<modificationDate>2026-10-30T16:10:28</modificationDate>
<timezone>Mexico/General</timezone>
<chair>
 <user>
  <title>Prof.</title>
  <name first="Isabel" middle="" last="Pedraza"></name>
  <organization>Benemérita Universidad Autónoma de Puebla</organization>
  <emailHash>65efd11437264d48aa1f7486255a57bc</emailHash>
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  <title>Dr.</title>
  <name first="Humberto" middle="" last="Maury Cuna"></name>
  <organization>Universidad de Guanajuato</organization>
  <emailHash>0bba80e6b6d806cda49089f089616ab2</emailHash>
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  <title>Dr.</title>
  <name first="Haydee" middle="" last="Hernandez-Arellano"></name>
  <organization>BUAP</organization>
  <emailHash>5848375cb8b0db28e94350f19dcb744f</emailHash>
 </user>
 <user>
  <title>Dr.</title>
  <name first="Beltran" middle="" last="Felix"></name>
  <organization>Benemerita Universidad Autonoma de Puebla</organization>
  <emailHash>398909c50ebb53abfbd6c5540e4e5066</emailHash>
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 <title>Estudio de violación de CP búsqueda de bosones pseudoescalares en el canal $A_p \to Zh$</title>
 <speakers>
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   <title>Mr.</title>
   <name first="Jadihel" middle="" last="Martinez Ramon"></name>
   <organization>Benemerita Universidad Autonoma de Puebla</organization>
   <emailHash>0463c373c2fd5abaf7843a15ad184bae</emailHash>
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  <user>
   <title>Mr.</title>
   <name first="Jadihel" middle="" last="Martinez Ramon"></name>
   <organization>Benemerita Universidad Autonoma de Puebla</organization>
   <emailHash>0463c373c2fd5abaf7843a15ad184bae</emailHash>
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 <location>
  <name>Puebla</name>
  <address>1. Edificio Carolino, Calle 4 Sur 104, Centro, Puebla, Puebla.
2. Ciudad Universitaria 2, Calle Heberto Rodríguez N°119, Colonia San Antonio Toluquilla, C.P. 72960, San Pedro Zacachimalpa, Puebla</address>
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 <startDate>2026-10-23T16:00:00</startDate>
 <endDate>2026-10-23T16:10:00</endDate>
 <duration>00:10</duration>
 <abstract>Los modelos con extensiones del sector de higgs, como el 2HDM y el MSSM, predicen la existencia de un bosón pseudoescalar A_p (CP-impar) cuyas propiedades están relacionadas con las fuentes de violación de CP. En esta plática se presenta un estudio fenomenológico de la búsqueda de un  A_p   producido por fusión de gluones y decayendo  A_p -&gt; Zh, con Z  -&gt; l+ l- y h-&gt;tau_h tau_h, Mediante un modelo efectivo. Se describe la simulación de señal y fondos con MadGraph5, Pythia8 y Delphes. Se discute la selección de eventos, la identificación de leptones $\tau$ hadrónicos, la reconstrucción de masa con FastMTT y un clasificador XGBoost para separar señal y fondo. Debido a la estadistica disponible, la sensibilidad se evalúa con el límite esperado de exclusión exacto basado en el metodo de Poisson (CLs) y comparandolo con el formalismo asintotico. Los resultados se interpretan en benchmarks del MSSM (M_h 125 EFT) en el plano (tan(beta), Czh) y se comparan con los límites actuales de CMS.</abstract>
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