Glitches in the Matrix

The Large Hadron Collider was first turned on in 2008. In 2010, Fiona Broome started the website mandelaeffect.com after noticing many different Mass Memory Discrepancy Effect reports, and popularised the phrase "Mandela Effect". The concept of false memories has been around for centuries, but these focus on individuals. There hasn't really been much evidence for larger groups of people experiencing them before.

This gives rise to much speculation.

In particular, the quantum physicists notion of many worlds, each created when tiny particles in one have a "choice" of how to behave and in fact take different choices, each choice being a parallel universe to the others, has been linked to these collective memory differences. This came about partly due to the timing mentioned already, and partly because of the idea of humans being able to create these parallel universes at CERN and affect "reality" by somehow retaining a memory of a past event which didn't happen in their universe.

Any connection?

Assuming every Mass Memory Discrepancy report isn't just a regular alternative memory which can be easily explained away, the straight answer is no-one knows.

It's a pretty far stretch as it is claiming every record of an event has been changed leaving only a few humans to remember it. To claim scientists tinkering with nature at its core are unknowingly, or even more worriying knowingly, altering reality is something straight out of Dr Who. All the theories about particle entanglement, superpositions, splitting realities and extra dimensions are all just that - theories.

What do these scientists know?

A particle physicist at CERN, Dr. Harry Cliff, said recently:

The next few years may tell us whether we’ll be able to continue to increase our understanding of nature or whether maybe, for the first time in the history of science, we could be facing questions that we cannot answer because “the laws of physics forbid it.” We may be entering a new era in physics. An era where there are weird features in the universe that we cannot explain. An era where we have hints that we live in a multiverse that lies frustratingly beyond our reach. An era where we will never be able to answer the question why is there something rather than nothing.

Cliff was speaking at a TED talk following the discovery of two new subatomic particles. 

The folks at CERN aren't stupid

Of course they know all about these "conspiracy theories", and have even, some would say, addressed them in a video of their own: 

You can see his point - or are they just having a big joke?
The descriptiion of any connection goes like this: we really are in one of many multi-universes, and this one was brought into existence at some point in the past when a particle's wave function collapsed into one particular state, leaving its other states to remain as waves. Those waves later themselves collapsed into slightly different states (and influenced other collapses) resulting in a different universe. The particle experiments at CERN are influencing this - somehow forcing the unnatural collapse of the waves, either resulting in different universes or preventing the ones which would have been created to exist at all.
If particles can be entangled across time as well as space, the result is a reality today which can influence a past event. Human memory is somehow outside of this, so those who experienced the initial event before CERNs influence remember the initial event only. The idea human memory exists outside of our brains isn't new either, it is known as the Akashic records theory. Medical science cannot find the specific area of the human brain responsible for memory, as Rupert Sheldrake proposes in a banned TED talk video.
We're all looking for answers...