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Deuteron and Anti-deuteron Production in $e^{+}e^{-}$ Collisions at the Z resonance (2006)

Abstract
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.

Publication details
Download http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=phep-2006-009
http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-ex&id=0604023
http://cdsweb.cern.ch/record/947277/files/0604023.pdf
http://cdsweb.cern.ch/record/947277/files/phep-2006-009.pdf
http://cdsweb.cern.ch/record/947277/files/phep-2006-009.ps.gz
Repository CERN Document Server (Switzerland)
Keywords Particle Physics - Experimental Results
Language eng