Boson Definition and 371 Threads

Entropy for 2State Boson System [URGENT!] Homework Statement Find the Energy and Entropy of a two state Bosonic system with energy states 0 & E. How is the Condensation of this system? Homework Equations The Attempt at a Solution i don't know how to start...

As a layman, I'm having a problem with understanding the search at LHC for the Higgs Boson. As I understand Einstein, all mass is nothing but energy. In that case, why are we looking for a particle which imbues mass? For example, in Rutherford's experiment, at least in my mind's eye, when...

If I wanted to learn just enough physics and maths to understand the predicted existence of the Higgs boson, how long would that take? (Assuming average undergrad ability). If you view the prediction as the top point of a pyramid of knowledge, how big is that pyramid?

Ok my understanding of the Fermion, Boson difference is this: Identical Particles carry a representation of the permutation group. Since we have not found any para statistics, this representation must be one dimensional. And there are only two one dimensional irreducible representations of...

what EXACTLY is the Higg's boson?

Suppose I want to find the minimum velocity of the electron and positron required to make a Z boson during annihilation. How would I go about this? I had an attempt which came out at 422ms^-1. This doesn't really seem right... so I'm guessing i made a big mistake...

what is the location of the higgs boson?

Almost: the result is 85 GeV, the measured mass is 80.4 GeV. Is there anybody who has ever looked at this coincidence? François

Perhaps asking this question is like someone who just learned how to add asking about differential equations, but I decided to go ahead and ask it anyway. The reasoning behind the Higgs field and its associated particle makes sense; however, how could physicists possibly predict its mass and...

Hello there. I have a question, or better yet, a proposition on the higgs boson/graviton: would it be possible for these to be one in the same? What I mean by this is that under the assumption that higgs boson does exist (which I agree with) that gravity is then propagated from the boson...

Can anyone provide a basic explanation what a boson is? I am not very familiar with quantum physics, so couldn't find an understandable explanation in the web. Thanks!

What does "hard-core" mean? What is "hard-core boson" model?

I understand the theory that "forces" as we conceive them are mediated by force particles or force carriers (the gauge bosons: photons for electro-magnetic force, gluons for strong nuclear force and W-Z bosons for the weak nuclear force, ). The analogy to gravity is the graviton. I am not...

Question leads on from others where s^1/2 = 200GeV mH = 70GeV EH = 91.5GeV and p = 59GeV, (three momentum). The reaction was e+e- -> HZ0 where H is higgs boson and Z0 is the Z0 boson with mass 91GeV It says the Z0 decays to two muon and antimuon. They are observed to be equal energy in...

I need help understanding the Higgs mechanism: what is the Higgs condensate, what is the Higgs boson, why do only the W and Z bosons have mass, and how exactly do particles receive mass? thanks guys!

Hi, I'm interested in constructive QFT and I'd like to pose a question about construction of the one-particle Hilbert space of states for bosons. For fermions satisfying the Dirac equation, the inner product is \langle \psi, \phi \rangle = \int d^3 x \; \psi^\dagger(x) \phi(x). The...

A friend just showed this to me and I thought it was neat. There's always been a history of physicists wagering on theoretical or experimental results, but it looks like it has spread to the mainstream. You can bet on whether the Higgs boson will be discovered before the end of the year...

Can bosons and leptons be in the same space at the same time? Bosons can with each other, but leptons can't... Thanks~~ ^_^

Hey everyone, I'm new here. I'm currently a Grade 12 Student interested in Astrophysics, who has just recently applied to University (in Canada: UBC, UVic, UofT, UWO, Queen's, and York; all for Astrophysics and/or Astronomy, if anyone wants to give me advice on which one to choose, please do...

Hi, this might sound stupid, but I have a question. why does massless bosons, such as photon, gluon have an infinite range where w and z bosons have finite ranges??

Premature, I am well aware. However, I was given an assignment to write an experimental procedure for measuring the spin of the Higgs Boson. I've already finished the paper so this isn't homework, but I am curious as to the motivations of my Professor. It is my understanding that the Higgs...

My first post - Hi everyone. I've been reading about boson mass and speed for a couple of hours but I can't seem to find answers. - What is the speed of the W boson during beta decay? If it has a huge mass shouldn't it be a lot slower than leptons? - I assume the electron and...

The propagator for gauge bosons in a spontaneously broken (non-abelian) gauge theory in the R_\xi gauge is (see Peskin and Schroeder eqn. 21.53) \tilde{D}^{\mu\nu}_F(k)^{ab}=\frac{-i}{k^2-M^{ab}}\left[g^{\mu\nu}-(1-\xi)\frac{k^\mu k^\nu}{k^2-\xi M^{ab}}\right]\,, where M^{ab} is the gauge...

Thanks for everyone's help so far, it's been extemely useful for researching my talk. Whilst doing other research for my talk I came across this on wikipedia: "More specifically, the Higgs boson would explain the difference between the massless photon and the relatively massive W and Z...

If the higgs boson is never found does that mean that the theory of weak interactions is partly useless because there is no local gauge invariance? If that this not the case then I really want to know what does it entail for the standard model and what would possibly have to be done to fix this...

According to my research on the Standard Model, gravitation is mediated by a massless graviton with spin 2. Upon examining the unity of comparison between cosmic time and quantum unification listed in reference 1, the unification of two forces is scaled at the rest mass (energy) of their bosons...

In an atom we know that there is a large space between the particles in an atom. Is this space supposedly filled with the higgs boson prarticle and if so how can we not have seen this particle before. Approx. how many of this boson would that mean there would be! Just speculation really... :)

Homework Statement What is the ratio of the partial widths of the decay of the Higgs boson into the bound state of b quark and b anti quark and c quark and C anti quark Homework Equations None The Attempt at a Solution Me and my friend disagree on the answer. I believe it should...

Hi! I was wondering how W+/- pairs can be created in an electron/positron collider. Does the e+e- form a Z^0 which decays to W^- W^+ ? http://www.particle.kth.se/zlab/project/Elep.gif I have found this picture, but there is no info about the mediating particle (in the small...

Why was is it needed to include the Z boson along with the W's... is the theory nonrenoramalizable without it?

i have a little doubt about the nature of the cooper pair that carries the super current if it is bosons or fermions? and why?

Would anyone know of any textbook that has explicit calculations of cross section using intermediate vector boson theory? I've looked in Perkins and Halzen+Martin but I do not see any in those texts.

Non-Higgs boson process of the generating of elementary particle masses in QFT As is known in the experiments on LEP and Bevatron, Higgs's bosons were not discovered. It is supposed that an energy amount bigger than 160 GeV is here needed. But some scientists doubt the detection of Higgs in...

How come that higgs boson hasn't been found yet? According to wikipedia,The non-observation of clear signals leads to an experimental lower bound for the Standard Model Higgs boson mass of 114.4 GeV at 95% confidence level. Since the Ferimlab Tevatron has 10 times more power for the particle...

Where are the Higgs boson particles supposed to be located? Is there one in the electron, neutrinos, proton, neutron? jal

The positive W boson decays to a anti-muon and a muon neutrino, it should be a weak interaction. And the positive Pion can decays to a anti-muon and a muon neutrino, too. But the lifetimes of them are totally different, so why? I know the positive Pion is composed of two quarks, but could you...

If the higgs boson particle is discovered, what are some of the applicatons that might be found for the information they find out ( new technology that might evolve, inventions ect.)

I have a question regarding the Higgs Boson/Field/Mechanism. My understanding of QFT is very rudimentary, but as I understand it the Higgs Boson is the quantum of the Higgs Field, which generates the vacuum energy providing the mass of the elementary particles. It assigns mass to bosons causing...

The Higgs boson introduced by P. Higgs (insert --> the spontaneous symmetry breaking with the gauge theories was also constructed by Robert Brout & Francois Englert) one question I do have is on the dynamics involved dealing with this concept - is it truly possible to detect the process by decay...

I've been going through a derivation of the massive boson propagator. The only trouble is I don't feel satisfied by one particular step. I've started getting the problem written up in tex so here goes: \newcommand{\del}{\partial}...

The wikipedia article on Bose-Einstein condensates mentions that helium-4 is, or can be, a boson. It says that a condensate is made by putting many bosons, such as helium-4, into the lowest energy state. How can an atom be a boson? I figured that an atom, composed of fermions, would have to...

We are pinning high hopes on LHC experiment. One of the expected results of the experiment is detection of Higgs Boson that would complete the standard model. In fact, discovery of Higgs Boson would complicate the theoretical issues because then we will need to find out.. a. origin of Higgs...

Occassionally, I come across this term: longitudinally-polarized boson. Does it mean that the boson spin is aligned with the x-axis ?

So I was reading about beta decay and they talk about the 2 forms W- and W+ but what i don't understand is what is the boson doing before this happens? I thought a proton or a neutron were made with gluons and 3 quarks? Is it that the boson is created during beta decay and if not what is its...

Dominant decays of W/Z bosons are quark aintiquark pairs which decay into jets of hadrons. But how can a quark decay into a hadron? Surely as hadrons are bound states of quarks then hadrons are heavier and so quark->hadrons violates mass conservation (energy conservation). I know I'm...

Hi I was wondering why the W+ boson is decaying into following quarks: up + anti(down) charm + anti(strange) bot not: up + anti(strange) [for example] both electric charge and baryon number is conserved. What am I missing? Is it the Cabibbo angle?

Thanks Lubos, Dear Lubos, Does string theory offer a concrete prediction for the mass of the higgs boson? Thanks Dan PS would you mind if I cross-post your response at sci.physics or PF? dan | 10.01.06 - 5:58 pm | # Dear dan, string theorists - just like everyone else - are...

Should the Tevatron see the Higgs boson? Given that it can collide at the TEV scale, shouldn't this be enough to see the HIGGS BOSON? What-if LHC does not observe the Higgs boson? Obviously this is bad for the standard model. Would this disconfirm string theory? Can the standard model...

What signatures will TEV/LHC seek with the HIggs Boson?

Let's suppose we have a Boson Non-interacting gas under an Harmonic potential so V(x)= \omega (k) x^{2} the question is if we know what the Partition function is Z= Z (\beta ) we could obtain the specific Heat, and other important Thermodinamical entities...but could we know what...