Antideuteron production in ϒ(nS) decays and in e[superscript +]e[superscript −] → q[bar over q] at √s ≈ 10.58 GeV

• Main Authors: Cowan, Ray Franklin (Contributor), Sciolla, Gabriella (Contributor)
• Other Authors: Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2014-10-10T18:13:44Z.
• Subjects: Article
• Online Access: Get fulltext

 We present measurements of the inclusive production of antideuterons in e[superscript +]e[superscript −] annihilation into hadrons at ≈ 10.58  GeV center-of-mass energy and in Υ(1S,2S,3S) decays. The results are obtained using data collected by the BABAR detector at the PEP-II electron-positron collider. Assuming a fireball spectral shape for the emitted antideuteron momentum, we find B(Υ(1S) → [bar over d]X) = (2.81 ± 0.49(stat)[+0.20 over −0.24](syst)) × 10[superscript −5], B(Υ(2S) →[bar over d]X) = (2.64 ± 0.11(stat)[+0.26 over −0.21](syst)) × 10[superscript −5], B(Υ(3S) → [bar over d]X) = (2.33 ± 0.15(stat)[+0.31 over −0.28](syst)) × 10[superscript −5], and σ(e[superscript +]e[superscript −] → [bar over d]X) = (9.63 ± 0.41(stat)[+1.17 over −1.01](syst)  fb.