The Low-Energy Frontier of Particle Physics

Session

Fifth Force and Variation of Fundamental Constants

Feb 12, 2025, 9:30 AM

Aula Salvini (INFN-LNF)

Conveners

Fifth Force and Variation of Fundamental Constants

• Angelo Esposito (Sapienza)

21. Overview of 229mTh based nuclear clock

Dr Mikhail Osipenko (GE)

2/12/25, 9:30 AM

Nuclear transitions have energy scale a few orders of magnitude larger than atomic ones. This mismatch of energy scales prevented to use laser sources for excitation of nuclear levels. In the 70th it was deduced that 229Th isotope might have an isomeric state at the energy of a few eVs. Recently, with development of the optical frequency combs, this state stimulated a broad interest, in...

22. Frequency metrology of buffer-gas-cooled molecular spectra for fundamental Physics research

Pasquale Maddaloni (Istituto Nazionale di Fisica Nucleare)

2/12/25, 10:10 AM

Based on the production of molecular samples at cryogenic temperatures by the buffer-gas-cooling technique and their combination with cavity-enhanced spectroscopy in the Lamb-dip regime, we present a new generation of high-accuracy physics tests beyond the Standard Model at the eV energy scale. Examples include searching for putative fifth-force interactions and assessing the space-time...

23. Long range forces: A theory review

Philip Soerensen (Istituto Nazionale di Fisica Nucleare)

2/12/25, 11:30 AM

Various types of BSM physics, in particular new light particles, can lead to long-range forces. We can search for such "fifth force" interactions by sensitivity measuring gravity on various scales. In this talk, I will review how such long-range forces can be generated and how they lead to apparent violations of the inverse-square law and the equivalence principle of gravity. I will also...

24. Discussion on 5th force and variation of fundamental constants

Philip Soerensen (Istituto Nazionale di Fisica Nucleare), Angelo Esposito (Sapienza)

2/12/25, 12:10 PM