The H dibaryon as a dark matter candidate

Details The H dibaryon as a dark matter candidate The H dibaryon as a dark matter candidate

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..apr.b9008z&link_type=abstract

American Physical Society, April Meeting, 2003, April 5-8, 2003 Philadelphia, Pennsylvania, MEETING ID: APR03, abstract #B9.008

Physics

Scientific paper

It has recently been proposed that the H dibaryon - a spin-0, baryon number 2, strangeness -2, state of 6 quarks - is lighter than two nucleons and is stable. We present a scenario in which the dark matter of the Universe is due to H's and bar H's, with no net baryon asymmetry: 2 nH + nB = n_barH. The asymmetry arises from CP violation in the annihilation cross sections which keep the H and bar H in equilibrium until they freeze out at T ˜ M_H/30. Remarkably, this scenario is consistent with observations. Nuclear lifetimes are in excess of limits, the H and bar H do not bind to nuclei so there are no exotic isotopes, doubly strange hypernuclear decays are acceptable, and laboratory and present-generation dark matter searches are consistent with cross section predictions. This talk will focus on the dark matter and baryon abundance calculation, and the most promising detection methods.

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