[W187] Mitrajyoti Ghosh: When muonium becomes antimuonium: a window into neutrino physics?

[Latin American Webinars on Physics]

Dear colleagues, 

We are excited to invite you to our next webinar on Wednesday, October 15, 15:00 UTC (10:00 am, Bogotá/Chicago). Our guest will be Mitrajyoti Ghosh (Florida State University), who will discuss about "When muonium becomes antimuonium: a window into neutrino physics?" The abstract can be found below. 

Join us via YouTube: https://www.youtube.com/watch?v=A6rCXXNWTzE

Abstract:

The question of whether neutrinos are Dirac or Majorana particles remains one of the biggest unanswered puzzles in particle physics. The observation of neutrinoless double beta decay would establish the Majorana nature of neutrinos, yet its non-observation provides no conclusive information. In this context, muonium–antimuonium mixing offers an intriguing and complementary probe of neutrino properties. This lepton-number–violating process is forbidden in the Standard Model with massless neutrinos, but can occur in many extensions, including those where neutrinos are massive. In this talk, I will explore muonium–antimuonium conversion and quantify how massive neutrinos contribute to it. I will also review the experimental efforts to detect this phenomenon, with particular emphasis on the background processes that complicate its observation and their implications for probing the nature of neutrino mass.

The talk will be based on

https://arxiv.org/abs/2504.05378 

Best,

Walter Tangarife

https://lawphysics.wordpress.com/2025/10/13/w187-mitrajyoti-ghosh-when-muonium-becomes-antimuonium-a-window-into-neutrino-physics/