2.9 sigma is hardly evidence of anything in fundamental physics. There was a 4 sigma evidence of diphoton excess from ATLAS and CMS last year which went away this year. 3-4 sigma discrepancies come and go. It's not for nothing that physicists have the discovery criteria set at 5 sigma.
What's more, one should be extremely skeptical when observations seem to violate long held physical theories. The superluminal neutrinos from OPERA ostensibly had >5 sigma evidence but nobody (correctly) took it seriously as it violated special relativity. Unsurprisingly, it was ultimately traced to a loose GPS cable.
What's more, one should be extremely skeptical when observations seem to violate long held physical theories. The superluminal neutrinos from OPERA ostensibly had >5 sigma evidence but nobody (correctly) took it seriously as it violated special relativity. Unsurprisingly, it was ultimately traced to a loose GPS cable.