Time Machine

[Dave]

Could Higgs Particle be a Time-Traveling Assassin?


Analysis by Ian O'Neill
Wed Mar 16, 2011 05:07 PM ET


Higgs-event

We've heard the story; a time traveler goes back in time, killing his grandfather. The upshot is that the time traveler ceases to exist. If the time traveler doesn't exist, how could he have traveled back in time to kill his grandfather?

This logical paradox is known as the "Grandfather Paradox," and although it makes for a great science fiction storyline -- or a seriously creepy Futurama "Grandma Paradox" adaptation -- it is a perplexing conundrum that has physicists scratching their heads.

If it is possible to travel back in time, wouldn't that cause a tangle in time? If, in the future, something is sent to a date in the past, shouldn't we already see it? How does the Universe prevent such paradoxes from occurring? If it doesn't, how can we exist at all?

ANALYSIS: Higgs is Still Hiding in Quantum Haystack

Enter the Large Hadron Collider (LHC), a particle accelerator that might (might!) become mankind's first time machine,* thereby helping us find out if we can kill our grandfathers in the past and still exist (or something like that).

"Time machine" is a very loose term in this case, as you couldn't actually use it to transport yourself through time (although there is a wormhole-LHC-time traveling theory that disagrees with this point), but the LHC might (might!) generate a type of Higgs particle that cuts through time like a hot knife through butter, and its decay particles appear in our universe before its own creation event.

This theory has been formulated by two Vanderbilt University theoretical physicists, Tom Weiler and Chui Man Ho. Stating the obvious, Weiler said that the theory "is a long shot," but it "doesn't violate any laws of physics."

We've heard about the devious nature of time-traveling Higgs particles before, but this time the Higgs isn't traveling back in time to sabotage the LHC, a second Higgs particle -- called the "Higgs singlet" -- might be generated at the same time as the creation of a "normal" Higgs boson.

ANALYSIS: God Hates the Higgs Boson

According to the physicists' calculations, the Higgs singlet may be able to travel in a fifth dimension (a dimension beyond our four-dimensional universe). But for this theory to hold true, our universe needs to abide by the laws of "M-theory," a theory that requires there to be 10 or 11 dimensions (basically an extension of string theory).

In M-theory, our Universe is only one of many universes that can be envisaged as layers of an onion skin, each layer being a different universe. The skin that represents our Universe is known as a "brane" and it is stacked atop other branes as part of the "bulk."

In the bulk, some forces, such as gravity, are predicted to permeate from one brane to the next. The details of M-theory are complex, and as yet unconfirmed, but the high-energy collisions inside the LHC may produce artifacts (such as short-lived micro-black holes) that reveal the presence of these predicted extra dimensions.

So, assuming M-theory describes the real nature of our Universe, how could we detect a Higgs singlet? If this particle only travels in a fifth dimension, time in our Universe isn't of consequence to that particle, so it could be created by the LHC in the fifth dimension, and when it decays, its "decay particles" (i.e. everyday particles that the Higgs singlet will create after it dies) will be detected at an arbitrary time.

This arbitrary time could be in the past, before the particle was even generated, or even in the future. Therefore, if physicists see particles spontaneously pop into existence before an LHC collision even occurs, that could be indicative of the Higgs singlet decay particles appearing in our universe. Simple!

CONTINUED AT:

news.discovery.com/space/could-higgs-go-back-in-time-kill-its-grandfather-110316.html