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The LHC does what every good particle smasher does -- find a new type of subatomic particle

The Large Hadron Collider has finally began to fulfill its potential.  After a string of early malfunctions, the world's largest collider has set records for the highest energy particle collisions.  Now, even as the smashing continues, the hard part begins -- combing through the mountains of data looking for interesting discoveries.

At the top of their wish list is the legendary Higgs boson, nicknamed the "God Particle", by the more colorful media establishment.  The Higgs boson is a theoretically predicted particle that would confirm the standard model of particle physics, explaining why some particles have mass and others don't.  Alternatively if the supersymmetry model holds true, up to five Higgs boson variants could be observed, disproving some of the standard model's theory.

I. LHC Finds a New Particle -- but not the Higgs Boson, Yet

Well, some of the data collected thus far has been scoured through, and disappointingly no conclusive evidence of the Higgs boson emerged (some readings indicate the possible existence of the particle, but were inconclusive).  Instead researchers discovered a new kind of Chi (X) particle.

The Chi (X) particle is composed of a bottom quark (also known as a "beauty" quark) and its anti-particle equivalent, the anti-bottom quark.  

LHC Collision
A computer visualization of one the LHC's collisions.  Scientists must sift through the individual sea of particles (trails shown here), hunting for new ones. [Image Source: CERN/LHC]

Quarks are tiny subatomic particles, which make up the constituents of atoms  -- like electrons, protons, and neutrons.  Any particle made up of quarks is called a hadron.  Their are two kinds of hadrons -- those made up of three quarks (baryons) and those made up a quark/anti-quark pair (meson).  Since the new Chi particle is composed of a quark/anti-quark combination, it belongs to the meson subclass of the greater hadron family.

Mesons have integer spins, meaning that they are bosons (like the Higgs boson!).  Boson particles obey Bose-Einstein statistics.

Chi mesons have a isospin of 0 (which dictates their strong interactions) and a positive G-parity on that isospin.  Together this is represented in shorthand as 0+.  The previously discovered chi particles had positive (P) parity and C-parity, and angular momentum values ranging from 0 to 2.  The previously known Chi mesons are -- χb0(2P) (0+0++), χb1(2P) (0+1++), χb3(2P) (0+2++).

The new particle is a "higher energy" Chi particle, in that it has a higher angular momentum number of 3.  It's been dubbed χb(3P) -- (0+3++).  Given the mass of the bottom quark -- over four times the mass of a proton -- it is unlikely that the LHC would have enough energy to create higher energy Chi particles.

II. LHC Passes a Time-Honored Accelerator Rite of Passage

Andy Chisholm, a PhD student from Birmingham, England, who worked on the project told BBC News that the location of the new Chi particle was a lucky find.  He comments, "Analysing the billions of particle collisions at the LHC is fascinating. There are potentially all kinds of interesting things buried in the data, and we were lucky to look in the right place at the right time."

Finding its first particle is sort of a right of passage in the particle collider world.  Past accelerators like FermiLab's Tevatron (America's largest particle accelerator, now defunct as the American government does not like to spend even a fraction of its immense budget funding important scientific research)
labored for years or more before finding their first particle, then went on to find many more particles over a fruitful run.

First time
The first one is always the hardest. [Image Source: Universal Studios]

University of Birmingham physicist, Professor Paul Newman comments on this right of passage, stating, "This is the first time such a new particle has been found at the LHC. Its discovery is a testament to the very successful running of the collider in 2011 and to the superb understanding of our detector which has been achieved by the Atlas collaboration already."

Thus far at least 175 mesons have been discovered.  

With each new meson discovered physicists creep a bit closer to understanding the strong force.  This understanding helps them better known what to look for when trying to find the kind/kinds of Higgs boson(s) predicted by the standard and supersymmetry theories of particle physics.  In that sense the discover of the new Chi quark may not be a "pay dirt" hit so to speak, but it's also not entirely a wash in the Higgs boson chase.

It also provides a bit of validation and good publicity, desperately needed to help the public appreciate the value of the accelerator -- which cost approximately $4.4B USD to build, and another billion or so to operate.  Keeping the 17 mile, 28 km (circumference) accelerator productive will help it avoid a fate similar to America's Tevatron.  If they can do that, physicists can continue their merry hunt for the Higgs boson and a better understanding of how our universe works on the most fundamental level.

Sources: Arxiv [Printserver; CERN], BBC News

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By EricMartello on 12/29/2011 5:22:26 PM , Rating: 1
The research is for the benefit of everyone if it gets results. If people thought like you when rockets were still around "who needs to put metal in space, what is metal anyways", then we wouldn't have any of this modern technology due to satellites or the ability to have things like very accurate, very up to date maps and navigation and so on.

You're failing to draw any parallels between research being conducted at the LHC purely to satisfy curiosity and the development conducted in our "space age" where we rounded up a bunch of german scientists post WWII to kickstart our space program. Being able to reliably launch stuff into space has clear benefits which today are mainly com, nav and surveillance satellites.

I'm pretty sure that the technology we have TODAY, which is largely a progression of the technology we secured after WWII, was based on the tech left behind by ancient aliens. Why is it that AFTER that sudden technological leap right after WWII we haven't had an era like that again? Aliens. That's why.

For all we know, their discoveries will lead to efficient quantum computers that some company will take the research and begin mass production. Computers with insane computational power that improve medical research so you can get a new limb that you lost being a dumbass.

For all we know? LOL Optimism and idealism are often bound closely to stupidity. I acknowledge that certain types of research can yield unexpected benefits, but the sh1t the LHC people are chasing is just as bad as these "ghost hunters" who think they're going to see a ghost if they visit a creepy place at night. Sure, the ghost hunters may inadvertently solve a murder or something by going to places nobody else would go, but would that be a reason to give them state or federal funding? No.

You can never know how useful this will be or what other field it will affect. Maybe better rocket engines, maybe more efficient fusion reactors that run more than 3 minutes and can actually be used for real, maybe better techniques to sculpt very small objects like circuits and nanomachines.

If they wanted to solve any of the problems you presented, they should aim their research specifically at any one of these problems and conduct tests that have the highest probability of yielding usable data. What they are doing is shooting in the dark to see what the bullet hits. There is no aim...and as I said before, this kind of research should be conducted by privately funded organizations.

Information is always useful.

No, it's not. If you have a specific goal that you wish to accomplish, then the only useful information is information that will help you accomplish the goal faster and/or better.

Too much information is also bad. I don't really need to know when someone takes a gamer sh!t.

Tell me, do you think the whole research on Mars is useless? What if they find life? What if they find some way to grow things there and have a colony? What if in the meantime some smart ass comes up with a good rocket design and mars can be mined for minerals and colonized and we find all sorts of cool shit

Being able to colonize another planet, mars perhaps, would have a potential benefit to no, I am not opposed to that. Is it really hard for you to follow my logic? It's not that complicated. The potential to discover "cool sh1t" is not a directive I would support for federal/state funded research.

"Let's face it, we're not changing the world. We're building a product that helps people buy more crap - and watch porn." -- Seagate CEO Bill Watkins

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