Reminder: New York, Saturday June 16th at 2pm, I’ll be giving a public lecture (click here for details): THE EINSTEIN OBSESSION: SCIENCE, MYTH AND PUBLIC PERCEPTION.
I’ve been doing a little work on my extra dimensions articles, adding one that describes how we know experimentally that the ordinary particles we’re made of (and most of the others we know about) can’t be moving in more than three spatial dimensions — more precisely, that any additional dimensions must be smaller in extent than 1/100th or so of the distance across a proton. The first half of the article is drafted; the second half, on what we know about dimensions in which no known particles can move but which are accessible to gravity and gravitons, will come soon, probably next week. Comments and questions welcome as always.
Meanwhile, following up on Friday’s post about the End of the OPERA Not-Faster-Than-Light Neutrino Story: a paper has appeared by the LVD and OPERA experiments explaining how they worked together to confirm that OPERA’s two known problems (a fiber-optic cable connection and a clock running off-speed) did in fact cause their faulty measurement of neutrino speeds. This information was made public (in large part) back in March and I wrote about it in detail here.