2006/04/11 by The ALEPH Collaboration, S. Schael, R. Barate +98 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1016/j.physletb.2006.06.043
published as Phys.Lett.B639:192-201,2006
arxiv created 2006/04/11 · openalex publication_date 2006/07/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
Deuteron and anti-deuteron production in Z decays has been observed in the ALEPH experiment at LEP. The production rate of anti-deuterons is measured to be ( 5.9 ± 1.8 ± 0.5 ) × 10 −6 per hadronic Z decay in the anti-deuteron momentum range from 0.62 to 1.03 GeV/ c . The coalescence parameter B 2 , which characterizes the likelihood of anti-deuteron production, is measured to be 0.0033 ± 0.0013 GeV 2 in Z decays. These measurements indicate that the production of anti-deuterons is suppressed in e + e − collisions compared to that in pp and photoproduction collisions.