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Weak Decays of the H-Dibaryon
Physical Review D (1986)
  • JF Donoghue
  • E Golowich
  • BR Holstein
We calculate decay rates and branching fractions for the postulated S=-2 H dibaryon, both for the expected ΔS=1 channels (nΛ,nΣ0,pΣ-) and for the possible ΔS=2 mode (nn). For ΔS=1 decays we find the S waves are dominated by ΔI=(3/2) transitions due to the Pauli principle, which forces the six-quark final state to be in a SU(3) 27-plet. If observed, this would be the first breakdown of the ΔI=1/2 rule. The lifetime is long, of order 10-8 sec, which should be considered in planning experiments. In the ΔS=2 case, we add a consideration of dispersive effects to our previous calculation of the box diagram, reinforcing our conclusion that the H is too short lived to be the explanation of the Cygnus X-3 events.
Publication Date
December 1, 1986
Citation Information
JF Donoghue, E Golowich and BR Holstein. "Weak Decays of the H-Dibaryon" Physical Review D Vol. 34 Iss. 11 (1986)
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