Slashdot Mirror
LHC Discovers New Particle That Looks Like the Higgs Boson
The wait is over: new submitter Roger W Moore (among many, many other submitters) writes "The ATLAS and CMS experiments at CERN have just announced the discovery of a new particle which is consistent with a Standard Model Higgs boson. There is still a lot of work to do to confirm whether this really is the Higgs, and if so whether it is a Standard Model Higgs, but this is a major result."
Does somebody mind to explain why a particle that gives mass is... that heavy? (no pun intended, just my total ignorance. Intuitively I'd thought it'd be very light, since it's used to give mass to other particles)
Slashdot, fix the reply notifications... You won't get away with it...
This is a weighty finding.
char*f="char*f=%c%s%c;main(){printf(f,34,f,34);}";main(){printf(f,34,f,34);}
I am glad they are being careful with their announcement and not jumping on it to claim 'I have found the Higgs Boson. Take that Tevatron!'
In the press conference, Dr. Higgs summed the findings up nicely: "This is an achievement in experimental methodology." To detect this signal has required a momentous effort, and the good people at CERN have had the good fortune of reaching results quicker than anticipated.
This isn't earth-shattering news or anything even unexpected, but it is still cause for celebration. Let us rejoice and then continue to push on towards new findings.
Here's a good introduction to the Higgs boson and why it matters.
Anand Rangarajan anand@cise.ufl.edu
Glad to see we may not be a Type 13 planet after all...
How is the Riemann zeta function like Trump rallies? Both have an endless number of trivial zeros.
Obviously this is a grand conspiracy by the Europeans to distract us from what really matters today - blowing shit up! If they really wanted to celebrate the Fourth, they would have blown up CERN.
I made it in the auditorium after queueing through half the night, but it was totally worth it. The atmosphere was collegeial and almost rapturous, one of sharing a feeling that we have as a whole community worked for so long to prove some mathematical construction of almost 50 years ago to be really realized in nature.
And let it now please NOT be a standard-model Higgs boson, but something a little more intriguing!
Now the "god particle" is proved everyone has to believe in Jesus
"Based on the Cern results alone there appears to be less than one chance in a million that this is fake, which is roughly the same probability as flipping a coin heads-up 21 times in a row."
http://www.reddit.com/r/science/comments/w0tty/higgs_boson_confirmed_at_5sigma_standard/c599ijb
Actually, we observed a new state at 125 GeV and it seems consistent with a Standard Model Higgs boson. We have NOT discovered the SM Higgs boson because we simply haven't confirmed that this new particle is the SM Higgs because we're only looking at mass itself. It could be something else with a mass of 125 GeV. To actually claim it is the SM Higgs, we need to confirm that it has spin 0, the right coupling ratios, etc. And that's what I'm working on right now. But it is very exciting because we have discovered new physics. Source: Working at CMS
Why OpalCalc is the best Windows calc
So, they might be mistaken. They've probably just detected me and got confused.
Now we just need to solve gravity, dark matter, dark energy, unify quantum chromodynamics with relativity, and a ton of other stuff.
Party's not over, folks. :)
I suspect dark matter will be easiest. Wouldn't be surprised at all if the LHC solves that one. All you need to see is what looks like a clear violation of conservation of energy/momentum at a consistant, high energy in your results, and you've got evidence that something heavy that interacts weakly or not at all with normal matter is flying off in the opposite direction. That something would probably be dark matter.
The others... that's probably going to be a long, hard slog.
Rock Us, Dukakis.
The mass of the Higgs boson is just the energy needed to make the Higgs field vibrate. The reason that the Higgs field gives particles mass is that, at its lowest energy level, the value of the Higgs field is not zero and this non-zero field then fills the universe and binds to particles giving them mass.
Hence the mass of each type of particle depends on the zero energy value (vacuum expectation value) of the Higgs field and how strongly the particle couples to it while the mass of the Higgs boson depends on how the energy density of the Higgs field changes as the strength of the field varies.
The legendary Higgs Boson is in my pants, and it feels great!
Scientists also report the particle is much smaller than expected
Already Apple have patented the new particle, on the basis that it gives the iPad mass so they must have invented it.
It's also not a Hadron.
The field is everywhere, not just around us but also inside us. Everywhere and anywhere. Comparable to electromagnetic fields, except you can't shield them.
What holds the galaxy (-ies) together is something else, that's gravity. Also a field, extending to fill the universe.
The Higgs particle (or field, can't talk about one without thinking about the other) gives the universe mass (well, it's one of the things that do that) so perhaps some clever brainiacs might be able to think something up connecting the Higgs and gravity in such a way that it unites all the forces. That would be a garuanteed ticket to Stockholm and a place in history as the greatest discovery (or theory, if you like) since the discovery of fire itself.
The LHC found the higgs at 125GeV. It can go up to 7 TeV. There are many more discoveries that this massive machine will find.
"That's right...I said it."
Don't take this the wrong way, consider me very excited to hear we've finally discovered the Higgs boson.
But honestly? I would have preferred we didn't find it. However deep we look, the universe appears to fit the standard model flawlessly, just a matter of adding more decimal places to our store of knowledge. So, we found it, the standard model prevails yet again - Where does that leave gravity and QCD? What do we look for now?
Or perhaps more to the point, does finding the Higgs, that everyone fully expected to find roughly where they found it, really answer anything? At the risk of sounding like I would ascribe some sense of agency to the question (I do not mean to - consider me an agnostic in the strictest epistemological sense), this just barely answers the "what"; Yet with billions of dollars and millions of man-hours and the highest tech known to Man, we haven't even come close to answering the "why". We have a handful of nice tidy self-contained islands that make up the fabric of the universe, with no better idea of why they exist or how they interact (in the mechanism sense, not the phenomenal sense) than we did a decade and many billions of dollars ago.
Thanks, you're right that I didn't get the reference. In retrospect it is obvious...
In my defence I'd like to offer that on a regular day about 67% of my brain activity goes to suppressing the memory of JarJar "MeesaSuckSoBadly" Bincks.
I've been trying to get a peek at Cindy Higgs' bosom since high school.
Have gnu, will travel.
Ok, this is going to be pretty rough, but here it goes:
The Standard Model describes all the "point particles" which can't be subdivided. Each of these particles has a few constant parameters like electric charge, color charge, mass, and spin. Electrons are one of them (-1e charge, 0.51MeV mass, spin 1/2) as are neutrinos (0 charge, some...mass, spin 1/2) and quarks (+2/3 or -1/3 charge, a few different masses, spin 1/2). Quarks come together in groups of 2 or 3 to build particles like protons and neutrons (and a whole bunch more). These are what you'd consider matter (Fermions). There are also particles that serve as "force carriers" - all the fundamental forces like electromagnetism and the nuclear forces can be thought of as exchanges of these other particles. They have integer spin, and we call them Bosons. The photon for instance represents the electric field (it's massless), the W and Z bosons represent the weak nuclear force (they have mass), and Gluons represent the strong nuclear force (they have color charge, like quarks).
The problem is that gravity isn't really mentioned anywhere in here, and unlike all the other particle parameters, "mass" seems pretty arbitrary. It's not a nice round number, so there has to be something else there behind the scenes. The solution to this is that we think there's another "field", which we call the Higgs field, and another force-carrying particle called the Higgs Boson. In the same way that particles with charge can interchange photons to "feel" the electric field, particles with mass can exchange Higgs bosons to "feel" the Higgs field. Particles that interact that way essentially tie up a bunch of energy in that reaction, and that extra bottled up energy is what we experience as mass. So the degree to which particles couple to the higgs field (you could think of it as their "mass charge" parameter) determines how much mass they have. And people way smarter than you and me have found equations that do, in fact, predict the right masses for various particles when you crunch the numbers.
The problem with finding bosons is that they're really just intermediary particles - photons are obvious enough only because they travel at the speed of light. Bosons with mass go much slower, and wind up decaying or interacting before we can directly observe them. So this find by the LHC is *indirect* evidence of the Higgs, based on how much energy they're missing from various collision interactions. But it matches the predictions to a very high degree so far, so they're calling it good.
This is the mistake I fear CERN is going to make.
All particle physics experiments have two aspects: they are designed with some very specific target in mind, and once that target is found or excluded they are then run for as long as humanly possible searching for new stuff, both by going to higher energies and making more precise measurements on things already known (different decay channels, etc.)
Sometimes--as in the case of the Kamiokande detector, which was originally aimed at proton decay--we repurpose the system for different particles entirely (solar neutrinos, say.)
So your "fear" is that the LHC teams will behave completely differently from every particle physics team ever anywhere. Good luck with that.
Blasphemy is a human right. Blasphemophobia kills.
The E in E =mc^2 refers to the rest energy, which is indeed zero for a photon. There's also a component related to motion, and it can be shown from relativity that the total energy is given by E^2 = p^2c^2 + m^2c^4. For a photon of course, this means that E=pc.
Relativistic mass is a rather useless concept, since it doesn't behave as we'd intuitively think that mass would, and is in any case equivalent to the total energy mentioned above. Best to stick to rest mass, which has the useful feature of being independent of frame of reference.
Quarks come together in groups of 2 or 3 to build particles like protons and neutrons (and a whole bunch more). These are what you'd consider matter (Fermions).
You probably meant hadrons (particles made of quarks), not fermions (particles with half-integer spin, in contrast to bosons with integer spin). In particular, there are both fermionic and bosonic hadrons.
There are also particles that serve as "force carriers" - all the fundamental forces like electromagnetism and the nuclear forces can be thought of as exchanges of these other particles. They have integer spin, and we call them Bosons.
All force carriers are bosons, but not all bosons are force carriers. Force carriers are also called gauge bosons, as they are bosonic excitations of gauge fields.
The problem with finding bosons is that they're really just intermediary particles - photons are obvious enough only because they travel at the speed of light. Bosons with mass go much slower, and wind up decaying or interacting before we can directly observe them. So this find by the LHC is *indirect* evidence of the Higgs, based on how much energy they're missing from various collision interactions. But it matches the predictions to a very high degree so far, so they're calling it good.
The problem isn't the bosonic nature of the particle, but rather its mass and strength of interaction with other particles, which affect the energy needed for its production, its lifetime and the possible channels of decay.
Bullshit. The so-called "Hutchison Effect" is a hoax, pure and utter fakery. Protip: anyone who claims to have discovered something weird, and then names it after themselves, is most likely a hoax.
And we have a very good idea of what causes gravity, or rather, what gravity _is_. Gravity is the tendency of spacetime to curve in the presence of objects with mass (and/or energy). This curving of spacetime causes other objects to travel not in straight (relative to our local Minkowski space) line paths, but in curves, when they are close to the first object (and vice versa). Since you can't see the external dimension that spacetime is embedded in where it curves (google "de Sitter-space" if you are interested), you see gravity as a force between massive objects.
for i in `facebook friends "=bday" 2>/dev/null | cut -d " " -f 3-`; do facebook wallpost $i "Happy birthday!"; done
Peter Higgs didn't name the mechanism. He only theorised about the family of "Lorentz-covariant field theories in which spontaneous breakdown of symmetry under an internal Lie group occurs".
(Yes, that's a direct quote from his second paper.)
sub f{($f)=@_;print"$f(q{$f});";}f(q{sub f{($f)=@_;print"$f(q{$f});";}f});