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<announcer>
 <user>
  <title>Dr.</title>
  <name first="Pablo" middle="" last="Roig"></name>
  <organization>Cinvestav</organization>
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<title>RADPyC2026</title>
<description>The Division of Particles and Fields of the Mexican Physical Society (DPyC-SMF) organizes every year the Annual Meeting (RADPyC). This space is dedicated mainly for the exposure of results of graduate students and young researchers working in high energy physics and includes some review talks on the hot topics of the field. This year the meeting will be held in Auditorio José Ádem, Cinvestav, Mexico City, México. The scientific programme will consist of invited and contributed talks, and a poster session. It will begin in the morning of Wednesday 17 June and end before lunch on Friday 19 June.

We will have the following invited talks:
 
- Ana Colmenero, HAWC (UMSNH)

- Jens Erler, The EW SM and constraints on NP (Mainz, PRISMA)

- Iván Martínez Soler, Neutrino physics (Durham Univ.)

- Cristina Oropeza, CMS (Ibero)

- Antonio Ortiz, ALICE (ICN-UNAM)

- Gabriel Palacios, Accelerator physics (UNAM)

- Antonio Pich, Flavor physics (IFIC)

- Pedro Podesta, Belle-II (UAS)

- Selomit Ramírez, QCD, Loop Tree Duality, Quantum Computing (UAS)

- Saúl Ramos, Flavor physics from a top-down perspective (IF-UNAM)

- Alfredo Raya, NICA (UMSNH)

- Eric Vázquez, DM-neutrinos (exp.) (IF-UNAM)


The whole event can be followed by Zoom:

https://us02web.zoom.us/j/85815121456?pwd=t1JWdqhgarEQRyewmXIEzNlkIcqU8a.1

(858 1512 1456 &amp; 044752).

Due to recent internet security problems at Cinvestav it will NOT be broadcasted via the DPyC facebook account (facebook is currently blocked on our premises).</description>
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<startDate>2026-06-17T09:00:00</startDate>
<endDate>2026-06-19T14:30:00</endDate>
<creationDate>2026-03-23T09:50:55</creationDate>
<modificationDate>2026-06-19T17:51:55</modificationDate>
<timezone>Mexico/General</timezone>
<chair>
 <user>
  <title>Dr.</title>
  <name first="Gabriel" middle="" last="Lopez Castro"></name>
  <organization>cinvestav</organization>
  <emailHash>f09241183e84638d226a8885656239cd</emailHash>
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 <user>
  <title>Dr.</title>
  <name first="Omar" middle="" last="Miranda"></name>
  <organization>Cinvestav</organization>
  <emailHash>6be00aeecce15d4b2547496f45352003</emailHash>
 </user>
 <user>
  <title>Prof.</title>
  <name first="Eduard" middle="" last="De La Cruz Burelo"></name>
  <organization>CINVESTAV-IPN Mexico</organization>
  <emailHash>207484e6583dd9c0c1af2f52ce04fdd8</emailHash>
 </user>
 <user>
  <title>Dr.</title>
  <name first="Pablo" middle="" last="Roig"></name>
  <organization>Cinvestav</organization>
  <emailHash>ea481e58ca9c64e14d7982cb66bcd604</emailHash>
 </user>
 <user>
  <title>Dr.</title>
  <name first="Pablo" middle="" last="Roig"></name>
  <organization>Cinvestav</organization>
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  <title>Dr.</title>
  <name first="Haydee" middle="" last="Hernandez-Arellano"></name>
  <organization>BUAP</organization>
  <emailHash>5848375cb8b0db28e94350f19dcb744f</emailHash>
 </user>
 <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>Generalized Michel parameters in the presence of massive Dirac and Majorana neutrinos for radiative leptonic decay</title>
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   <title>Mr.</title>
   <name first="Luis Alfredo" middle="" last="Clemente Martínez"></name>
   <organization>Universidad Veracruzana</organization>
   <emailHash>cdc43f13f02c16e402ad05456072e54e</emailHash>
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 <primaryAuthors>
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   <title>Mr.</title>
   <name first="Luis Alfredo" middle="" last="Clemente Martínez"></name>
   <organization>Universidad Veracruzana</organization>
   <emailHash>cdc43f13f02c16e402ad05456072e54e</emailHash>
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   <title>Dr.</title>
   <name first="Fabiola" middle="" last="Fortuna"></name>
   <organization>IFUNAM</organization>
   <emailHash>af7a41574d90000f0802c7e6e52a6e68</emailHash>
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 <duration>00:15</duration>
 <abstract>We study radiative leptonic decay within a model-independent EFT framework. Starting from the most general four-lepton effective Hamiltonian, written in terms of scalar, vector and tensor Lorentz structures, we review how the usual Michel formalism provides a convenient way to describe possible deviations from the Standard Model interaction. Motivated by the existence of neutrino masses and mixing, we extend this framework by expanding the neutrino fields on the mass basis, allowing for both Dirac and Majorana massive neutrinos. We consider the radiative process, where a photon is emitted from the charged lepton lines (inner bremsstrahlung contribution). This allows us to include massive neutrinos in radiative leptonic decay distributions, which can be organized in terms of generalized Michel parameters, expressed as linear combinations of weighted Wilson coefficients. The aim of this talk is to present the theoretical motivation, the effective framework, and the methodology behind this extension, together with the structure of the resulting radiative decay distribution and its potential relevance for probing heavy Dirac or Majorana neutrino effects in leptonic processes.</abstract>
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