From Kavassalis's blog: "Neutrinos are the most likely candidate, since we know that they are actually there, but we also know that they don’t really interact with much. There is nothing in the Standard Model to suggest that neutrinos should effect radioactive elements in a way that could influence decay rates. There is also talk of some yet unknown particle that may also be produced in the sun that is interacting in these systems, but there is nothing within conventional particle physics to suggest what this may be. There is still obviously a chance that neutrinos (or something else) are just interfering with the detection mechanism (although the authors feel they have ruled this out), but there is also an interesting chance that there is some new neutrino physics being observed here. This is something to keep an eye on."
Slashdot Mirror
From Kavassalis's blog: "Neutrinos are the most likely candidate, since we know that they are actually there, but we also know that they don’t really interact with much. There is nothing in the Standard Model to suggest that neutrinos should effect radioactive elements in a way that could influence decay rates. There is also talk of some yet unknown particle that may also be produced in the sun that is interacting in these systems, but there is nothing within conventional particle physics to suggest what this may be. There is still obviously a chance that neutrinos (or something else) are just interfering with the detection mechanism (although the authors feel they have ruled this out), but there is also an interesting chance that there is some new neutrino physics being observed here. This is something to keep an eye on."