Nuclear and nucleon transitions of the H dibaryon
Abstract
We consider 3 types of processes pertinent to the phenomenology of an H dibaryon: conversion of two Λ’s in a doubly strange hypernucleus to an H, decay of the H to two baryons, and—if the H is light enough—conversion of two nucleons in a nucleus to an H. We compute the spatial wave function overlap using the IsgurKarl, MillerSpencer and BetheGoldstone wave functions, and treat the weak interactions phenomenologically. The observation of Λ decays from doubly strange hypernuclei puts a constraint on the H wave function which is plausibly satisfied. Imposing this constraint, we obtain modelindependent lower limits on the H lifetime; if m_{H}<m_{N}+m_{Λ}, the H lifetime can be of the order of or longer than the age of the Universe. We discuss limits on a longlived or stable H, and point out how experiments can improve the constraints.
 Publication:

Physical Review D
 Pub Date:
 July 2004
 DOI:
 10.1103/PhysRevD.70.014008
 arXiv:
 arXiv:hepph/0308137
 Bibcode:
 2004PhRvD..70a4008F
 Keywords:

 12.39.Mk;
 13.75.Cs;
 Glueball and nonstandard multiquark/gluon states;
 Nucleonnucleon interactions;
 High Energy Physics  Phenomenology
 EPrint:
 Phys.Rev. D70 (2004) 014008