title: Direct detection constraints on superheavy dark matter.
abstract: The dark matter in the Universe might be composed of superheavy particles (mass greater, similar 10(10) GeV). These particles can be detected via nuclear recoils produced in elastic scatterings from nuclei. We estimate the observable rate of strongly interacting supermassive particles (simpzillas) in direct dark matter search experiments. The simpzilla energy loss in Earth and in the experimental shields is taken into account. The most natural scenarios for simpzillas are ruled out based on recent EDELWEISS and CDMS results. The dark matter can be composed of superheavy particles only if these interact weakly with normal matter or if their mass is above 10(15) GeV.
authors.affiliation: Space Science Laboratory and Astronomy Department, University of California, Berkeley, California 94720, USA.
authors.forename: Ivone F M
authors.initials: IF
authors.lastname: Albuquerque
authors.forename: Laura
authors.initials: L
authors.lastname: Baudis