Pizza Seminars

On the proton radius puzzle

by Ms CLARA PESET (UAB)

Europe/Madrid
Seminar (IFAE)

Seminar

IFAE

Description
The proton radius was recently measured in muonic hydrogen spectroscopy giving a results that is 7-sigma (4.4%) away from its CODATA value. This value is based on measurements which come both from hydrogen spectroscopy and from the electron-proton scattering. Muonic hydrogen is around 8-million times more sensitive to the effects of the finite size of the proton than hydrogen, since the muon is around 200 times heavier than the electron, which makes this discrepancy one of the most interesting puzzles in physics nowadays. We will review how the proton radius is defined and which are the effects that are measured in the experiments. The effect of the proton radius in spectroscopy is measured from the Lamb shift, the splitting between 2P-2S energy states. We will review which are the most likely theoretical and experimental sources for this discrepancy and which are the state of this puzzle at the moment.
Slides
Participants
  • Alba Fernández
  • Alfonso Garcia
  • Alicia López-Oramas
  • Antonio Pineda
  • Carles Sanchez Alonso
  • Christophe Grojean
  • Christopher Bonnett
  • Dilber Uzun
  • Eduard Masso
  • Ekaterina Mikhaylova
  • Enrique Fernandez
  • Eugenio Megias
  • Federico Sanchez
  • Geraldine Servant
  • Gerard Ariño
  • Gianluca De Lorenzo
  • Imma Riu
  • Ivan Lopez Paz
  • Javier Caravaca
  • Javier Rico
  • Jelena Aleksić
  • Joaquim Palacio Navarro
  • Joern Lange
  • John Vo
  • Juan Cortina
  • Lars Hofer
  • Lluïsa-Maria Mir
  • López Rubén
  • Machiel Kolstein
  • Martine Bosman
  • Mateo Garcia Pepin
  • Matteo Cavalli-Sforza
  • Michela Ieva
  • Oriol Pujolas
  • Pol Martí Sanahua
  • Ramon Miquel
  • Raquel Castillo Fernandez
  • Sergi Gonzàlez-Solís
  • stefania bordoni
  • Thomas Konstandin
  • Thorsten Lux
  • Yuan Zhong
  • Yónatan Calderón
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