2008/06/30 by J. -M. Frère, Jean-Marie Frère, Thomas Hambye +3 · 2 citations
Computer Science · Physics and Astronomy · #Asymmetry #Baryon asymmetry #CP violation #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #Falsifiability #Gauge boson #Leptogenesis #Neutrino #Particle physics theoretical and experimental studies #astro-ph.CO #hep-ph
paper · pdf · doi:10.1088/1126-6708/2009/01/051
published as JHEP 0901:051,2009 · 22 pages ; v3: discussion about resonant leptogenesis case added ; matches JHEP published version
openalex publication_date 2009/01/20 · arxiv created 2009/03/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
It is well known that the leptogenesis mechanism offers an attractive possibility to explain the baryon asymmetry of the universe. Its particular robustness however comes with one major difficulty: it will be very hard if not impossible to test experimentally in a foreseeable future, as most of the mechanics typically takes place at high energy or results from suppressed interactions, without unavoidable low-energy implications. An alternate approach is taken by asking: can it be at least falsified? We show that possible discoveries at current and future colliders, most notably that of right-handed gauge interactions, would indeed forbid at least the "canonical" leptogenesis mechanisms, namely those based on right-handed neutrino decay. General lower bounds for successful leptogenesis on the mass of the right-handed gauge boson WR are given. Other possibilities to falsify leptogenesis, including from the observation of a Z', are also considered.