Higgs Definition and 674 Threads

Hello! I would like to know how to calculate the width of the two-photon channel of the SM Higgs. It seems to be quite a tedious calculation with a dimensional regularization to perform. There are two one-loop contributions (leptons and W). Thank you very much in advance for your help! B...

Good morning everyone! :smile: What do people think of the Higgs fermion candidate reportedly being studied at the Albanian reactor at Loöf Lirpana? … :confused: http://en.wikipedia.org/wiki/Higgs_boson#LoofLirpana

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

Hi there Lately, I have been irritated by some general articles about the Higgs Mechanism in newspapers. Those articles suggest that it gives mass to all particles (vector bosons + all fermions). However, if I read a textbook I can only extract from the context that it gives mass only to the...

didn't know where to post this. Was wondering earlier why objects have mass so i googled it.. I'm in grade 12 so don't really understand EVERYTHING you know lol. but anyways found out about higgs field and higgs boson. Can someone explain how this explains why things have 'mass' like why do...

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.)

Please apologise to my poor English, and I am the bigginner in this field. I have recently read about The inflation of the universe. It said that The Higgs Particles causes universe expansion with acceleration because of its negative density. Does it mean it has a negative mass or a...

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...

They say Higgs particles are so hard to detect because their mass is so big. But when their mass is so big, wouldn't that make them easier to detect?

This question is going to be very weird, but bear with me please. The higgs, we believe is associated with the gravitron, correct? And it's possible that dimensions 5-7 could be the electromagnetic spectrums that can manipulate the higgs/gravitron? Or am I not even close? I am doing research...

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...

To date, the little higgs implied by some SUSY models requires higgs of energies less than 130 GEV, which Fermilab's Tevatron has not yet seen. These models do help explain EW breaking, however, If SUSY explains E-w scale breaking, does it require a little Higgs at Tevatron energies? I...

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 have is on the dynamics involved dealing with this concept. Could someone please explain the properties/mechanics...

So there are a couple of things I've read lately which at some point attempt to explain the Higgs Boson, one of which is "The Road to Reality" by Roger Penrose and the other one is this page of "one page explanations" of the Higgs Boson. I'm kind of confused by the depictions of the Higgs in...

If Fermilab's rumored energy bump is just a speed bump on steroids (they have had a good run, up to ~200 GEV?); and if LHC doesn't find Higgs, at it's lower range, i would assume, then perhaps another scenario might be entertained. That is, perhaps it's simply the needle in the haystack...

Interesting new paper from John Moffat: http://arxiv.org/abs/0709.4269 Introduces a non-local, finite QFT that dynamically generates boson and fermion masses as loop corrections. Experimental evidence for the theory will be visible in WW scattering at the LHC (coupling goes to zero, which...

One difference between GR and LQG is that LQG is chiral, whereas GR is not. In order to break the electroweak symmetry, a higgs field needs to be introduced by hand. Einstein's understanding of inertia implies a strong EP as gravitational mass and inertia are identical, while a higgs...

Let me see if I get it right or I dreamed it: in order to give mass to a quark or a lepton the higgs field must be in the same isospin representation that the fermion, must it? IE, can a particle in a isospin triplet get mass from the minimal higgs? Or in the reverse, should a triplet higgs...

I need a reference describing the possible decay modes of the Higgs. Can anyone recommend any books or websites?

What is Higgs field? Some books say that because of this field the matter has the properties of mass but when I see arxiv I think it's something different. If Higgs particle is a boson then why this Higgs mechanism not considered a force?

Forgive if I'm being sarcastic, but I just read on the Higgs mechanism, giving mass to the fermions and bosons. But at the same time, Higgs itself has mass? Isn't that abit irony?

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...

Let me take an example. Suppose we have a Lagrangian, of a scalar field coupled to itself and a massless gauge boson field. Next, we expand the Lagrangian about the vacuum expectation value of the scalar field, and it turns out that, in the end, the gauge boson is massive. My question is...

I just read this book on the Standard Model. It goes over most things very briefly and one thing it explained badly was the higgs particle. Why exactly does it give every other massive particle mass? The Higgs field from a single particle would be negligible from far away right? If we...

I have read that the current expansion of the universe could be due to a bare positive cosmological constant along with a negative cosmological constant due to the false vacuum of the higgs field. Currently this negative CC is not enough to cancel the positive cc but with time this can be...

If Neutrinos have mass, What is the velocity of neutrinos, can they "slow down" due to gravity, and do their acquire their mass from interactions with the HIggs field?

Good morning everbody, very good indeed. Well, tell me what you think : http://dorigo.wordpress.com/2007/01/19/a-21-sigma-eccess-of-mssm-higgs

What mass will the lightest Higgs found in the next three years have? No Higgs found in next three years, Below 114 GeV 114-130 GeV 130-150 Gev 150-180 GeV 180-220 Gev 220-360 Gev Above 360 GeV Notes: 1. MSSM Higgs predicted less than 130 GeV, non supersymmetric SM Higgs probably...

I'm pretty new to particle physics. Actaully, I'm brand new to particle physics (2nd year undergraduate). I've been invited into a course on the Higgs recently and have a few questions I was wondering about. I was wondering what would happen if Higgs did not couple to fermions? Does this mean...

Can anyone tell me what the experts expect the Higgs mass to be in various well discussed models? i.e. SM MSSM nMSSM little Higgs split supersymmetry others? Or do they all just predict 114-1000 GeV? I think MSSM predicts less than 125 or 130 max. I have heard rumors that SM...

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...

Does Einstein's General Relativity need to be adjusted for the Higgs field? Since the Higgs field gives most particles mass, and permeates all space, then GR needs the higgs field to be a theory of space? So where GR is highly curved, the higgs field is also curved? And does a highly curved...

the Higgs field: so gravitational field by itself cannot confer mass to elementary particles? What properties of a particle determine how it interacts with the Higgs field in such a way that it gains mass (whereas others, such as photons, remain massless)?

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

How related are the concepts of the Higgs field and QFT in curved spacetime? As I understand it, The Higgs mechanism is derived from a false vacuum where no particles exist yet, but the Higgs field contains potential energy at an unstable equilibrium. This unstable potential is what drives...

http://arxiv.org/abs/hep-ph/0608079 CP Studies and Non-Standard Higgs Physics Authors: S. Kraml, E. Accomando, A.G. Akeroyd, E. Akhmetzyanova, J. Albert, A. Alves, N. Amapane, M. Aoki, G. Azuelos, S. Baffioni, A. Ballestrero, V. Barger, A. Bartl, P. Bechtle, G. Belanger, A. Belhouari, R...

Are the Higgs and the Graviton supposed to interact or are they two different particles from two different theories?

The Higgs boson was proposed to provide a mechanism for mass and is posited, as a field, to extend throughout the Universe. But this was before we started thinking the neutrino, which is also (almost) omnipresent, must have a mass. Could the neutrino substitute for the Higgs in this role?

Why is the (mass)^2 term of the Higgs Boson negative in the Standard Model Lagrangian to start with? I understand that along with the H^4 term, it gives rise to dynamical symmetry breaking, which explains a bunch of stuff (and eventually gives us a physical mass term for the Higgs). But I find...

Is there a model that will permit a higgs-less model, without to much adjustment to the standard model ?

I had my first lecture on the Standard Model today. The lecturer presented the Lagrangian for the Standard Model, which took up two slides. However, it contained terms that referred explicitly to the Higgs field, whereas I was under the impression that the Standard Model didn't need the Higgs...

Hello, For clarification because of the ambiguous situation in searching for & concerning the Higgs Field. It is with 95% confidence that the Higgs Field exists. Yet it has not been seen as of the end of 2005. I hope LHC/CERN will shed light on the subject. Anyone dealing or knowledge...

Hi, I've been looking at ways to create Higgs bosons in lepton colliders, mostly muon colliders. I have a question on how one would be certain that it is actually the Higgs that has been found. The main channel that is going to be used seems to be the so-called s-channel, where \mu^+ + \mu^-...

Greetings--I'm looking for data on estimates for the Higgs resonance width and I'm not quite sure where to look. I've checked the "Review of Particle Properties" and the Particle Data Group website, but I couldn't find an estimate for the higgs width. Any suggestions? Thanks, Flip

Hi. I hope I'm posting in the right place. I was just wondering, what is the difference between the graviton and the higgs boson. I'm not quite sure, I think I sort of understand it... but not really. Also, since I don't want to make a new thread for such a small question, is there...

Hi, In what way the theorethical Higgs bosons (if experimentally detected) will contribute to the Theory of Everything ? Thanks

an underlying fabric that permeates even a vacuum space and displays liquid like characteristics (most evident on a macro and micro cosmic scale ie wave particle duality, dark energy) the energy of this fabric is known as c, the speed of light which is the manifestation of the expansion...

OK, this is so unlike me to advertize a theory activity on Supersymmetry, etc. But as a community service, I thought I should point out to those who are interested, that the Argonne Theory Institute will be starting it's Theory Institute 2005 workshop titled "Supersymmetry, Extra Dimensions, and...

Hi, I'm new, and not sure I'm writing this in the right place or way ... how does matter curve space? is it the mass made by the Higgs that makes cpace bend? I red that einstein said space was a fabric - is that right? seems to me it can't be, cos fabric is like what clothes are made of...