WEAK DECAYS OF THE H-DIBARYON
Journal or Book Title
PHYSICAL REVIEW D
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.
Donoghue, JF; Golowich, Eugene; and Holstein, BR, "WEAK DECAYS OF THE H-DIBARYON" (1986). PHYSICAL REVIEW D. 179.
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