WEAK DECAYS OF THE H-DIBARYON

Publication Date

1986

Journal or Book Title

PHYSICAL REVIEW D

Abstract

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.

Comments

Published version is located at http://prd.aps.org/abstract/PRD/v34/i11/p3434_1

Pages

3434-3443

Volume

34

Issue

11

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