1999/05/11 by S. Prelovsek, Prelovsek, S., S. Fajfer +3
Medicine · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9905304
5 pages, Talk presented at XXXIV Recontres de Moriond on 'Electroweak interactions and unified theories', Les Arcs, 13-20.3.1999
arxiv created 1999/05/11 · openalex publication_date 1999/05/11 · arxiv updated 2009/11/30 · openalex created_date 2020/04/24 · openalex updated_date 2026/07/28
Flavour changing neutral current (FCNC) transitions c→ uγ and c→ ul+l- are very rare in the standard model and present an interesting probe for the physics beyond it. We study long distance contamination to these short distance processes in different hadron decays. As the most suitable probe for c→ uγ transition we propose Bc→ Bu^*γ decay. Its detection at the branching ratio well above 10-8 would signal new physics. The c→ ul+l- transition may be probed at high mll in D→ πl+l-. The decays D→ Vγ and D→ Vl+l- (V is a light vector meson) are less suitable, since they are dominated by the long distance effects.