Boson Definition and 365 Threads

The SM Higgs-boson is a CP-even state, as far as I know this is confirmed in the Higgs decay to di Z bosons, so why there are dozen of papers that propose to measure CP quantum number of the Higgs in tau tau final state?, what is the difference between CP in ZZ and tt of Higgs decay ?

I know the Higgs field and the capabilities of the Higgs Boson, but I could never understand how physicists concluded the finding of a Higgs Boson

If a Z can decay to a photon, what happens to the Z's weak charge?

We know lepton conservation law, that means multiple neutrinos can not be consolidate to big single neutrino. But photon is boson not lepton, no need of conservation, does that mean it is possible to combine or fuse a bunch of photons into ONE big photon, or say, more energetic photon, i.e...

I naively imagine that a higgs & an a-higgs can annihilate by photon emission, similar to all SM particles. Is this a-higgs permitted by the SM & does the discovery of the higgs strongly suggest the a-higgs exists ?

Do a particle influence another particle by exchange of gauge bosons? If so, how?

I have two questions... I'm sorry for my bad English. - Is it correct to think of the Higgs Boson as a quantization of the Higgs Field, as the photon is the quanta of Electromagnetic Field? - The property we call spin appears when we analyze electrons interacting with a magnetic field. But...

In 1964 three papers were published, Why was Peter's name chosen for the boson? Who chose it? 1) Belgian physicists Robert Brout and Francois Englert Physical Review of Letters, Volume 13, number 9, August 31, 1964, Pages 321-323...

Question: Draw the lowest-order Feynman diagrams for the e+e- --> W+W-process The answer gives three diagrams. I understand the first two, but the third makes no sense to me. Here it is: So this is a t-channel Feynman diagram. As far as I can tell regarding how these types of Feynman diagrams...

What would be the ramifications of discovering that a) dark matter radiates something non-electromagnetic, and that b) this radiation always travels at a constant velocity according to all inertial reference frames, but c) this constant velocity is equal to, say, c times pi?

anyone have any idea what the Madala boson that supposedly is found in LHC data? obviously it is proposed to explain dark matter, but it is a spin-0 field related to the Higgs. claim is that Madala boson mediates the dark sector. supposedly a 3-sigma excess at 270 GeVScientists predict the...

since gravity under GR has unlimited range the graviton must be massless. since the graviton is massless, the higgs field does not couple to the graviton. If the higgs field did couple to gravitons, it would cause gravitons to have mass, contradicting observation. but the higgs field carries...

The latest measurement of the Higgs boson mass from the ICHEP conference (based upon four lepton events measured by CMS) was 124.5 +0.48/-0.46 GeV. This is less than the current global average of about 125.09 +/- 0.24 GeV, which is statistically consistent with the global average but will...

regarding this paper Evidence for a Protophobic Fifth Force from 8Be Nuclear Transitions Jonathan L. Feng, Bartosz Fornal, Iftah Galon, Susan Gardner, Jordan Smolinsky, Tim M. P. Tait, Philip Tanedo (Submitted on 25 Apr 2016) Recently a 6.8σ anomaly has been reported in the opening angle and...

What other theories this number make impossible or improbable. When final number was given I hear some older physicist saying for one " 40 years of works gone" second grinding "only 30 for me!" We are ask to follow establish science. Seem to me that lots of theories was built on other's ones and...

What I mean by this is how were the laws of quantum mechanics used to predict that the higgs boson would decay into 2 photons or 4 electrons. I understand that the higgs boson transmits the higgs field, but why would a particle that transmits the higgs field have to decay in that wayand not some...

What can a theoretical physicist discover something new about the higgs boson . This is for experimentalist but can a theoretical physicist discover anything new about the higgs boson ? And what peter higgs discovered other than detected it . He is a theoretical physicist did he wrote a new...

Greetings, I have read seemingly contradictory things regarding the Higgs boson: that they permeate all of space and that it was created at extremely high energies in the LHC. I just heard a scientist say the Higgs field is full of HIggs bosons. So does the Higgs boson occur naturally or not...

So this may be just me being stupid. Anyway, so i was reading about the higgs and i read it has been found in LHC to have a mass of 125 Gev, according to their expriments. Now here comes what i don't understand, how can the particle that gives mass have mass, and wouldn't that cause the higgs...

As a physics A Level student, I am interested in understanding particle physics. Recently I have read that a W boson, as a relatively heavy particle, decays into one of three charged anti-leptons, and one of the three neutrinos. If a W boson decays to form an anti-tau lepton, it will also form a...

"The presence of this field, now believed to be confirmed, explains why some fundamental particles have mass when based on the symmetries controlling their interactions they should be massless." (wiki) It would seem, to myself, a novice, that the Higgs field and its corresponding particle, if...

Considering a Z boson decay into a fermion-antifermion pair. How can i say if the process respect parity and charge conjugation?Thanks

The answer is given as (a). I want to know the reason. It is a boson. Why can't it form a Bose-Einstein condensate?

I most recently heard about the new mathematics that help predict glueballs properties better. I had the really strange question of, why can't all other bosons have a cluster particle, like the glueball. Is it due to there force strength over distance or am I missing something.

Hi All 1. Homework Statement with the known coupling strenght between SM neutrinos and Z boson Z_{\mu} \bar{\nu}_{L} { \gamma}^{ \mu} \nu_{L} how can I get the coupling strength for Dirac neutrinos Z_{\mu} \bar{\nu}_{Dirac} { \gamma}^{ \mu} (1- { \gamma}_{ 5} ) \nu_{Dirac} ? thanks

hy physics forum, I am doing an advanced qm course, but i still have some doubts about the correct formalism and so on.. so i have this problem of a one-dimensional harm. oscillator including 2 bosons. the hamiltonian would thus be ## \hat{H}=1/2 (\hat{p_1}^2+\hat{p_2}^2+\omega...

I recently read this article about how the Higgs Boson could decay into Dark Matter particles. Why is this not being taken seriously, there must be something, and I am not a physicist, just a ninth grade student, so why is this either a good theory or bad theory? Thanks in advance! Here is the...

why do scalar interactions(for example the higgs vev or its components) reverse the chirality of the interacting particle?? i think this is the key for understanding the mass generation of fermions, but i can't think of a logical reason of the reversed chirality.

As you may know, the mass of the Higgs Boson is 125 GeV. My question is, "How can the particles themselves that create mass by interacting with others have mass?"

This is more of a QFT question, so the moderator may want to move it to another forum. The simplest example of a QFT that I learned was the scalar field; in Sakurai's 1967 textbook. I know the Higgs is a J=0 particle. Is it described by the simple scalar field discussed in Sakurai's text? I ask...

I have been looking into Dark Matter recently and how we know really little about it to even try to identify what it is clearly. But Dark Matter obiously has mass which means that in some way it must be interacting with the Higgs Field. So could studying the Higgs Boson and comparing its...

Is higgs boson massless? Photon is massless , is photon get mass when interract with water?

i was thinking about the Higgs Boson analogy that was put forward to help describe how it works/interacts to produce mass, of a very famous person walking into a party, everyone gathers round impedes progress, high interaction with Higgs field and particles therefore high mass, and then a less...

Is highs boson a subatomic particle? If so what gives it mass. I mean if Higgs boson give mass to other particles then what gives mass to Higgs boson? Also could anyone explain how it can give mass to other particles? I would also like to ask about the light photons. How come they hon have mass...

I have questions regarding the 24 gauge bosons of the SU(5) model. I keep seeing this matrix popping up in the documents I'm reading with no real explanation of why: First of all I'm wondering how this is constructed, which means I'm wondering what the V_{\mu}^{a} look like (I already have...

I'm looking at the simplest example of an interacting theory, and this is the theory of a neutral scalar boson $\phi$ with $\lambda \phi^4$ interaction term. Can I ask: is there a physical interpretation of the `charge' through which this field interacts with itself? In particular, is \lambda...

I'm new to quantum physics, and this might be a stupid question. What is the difference between Photons and the Higgs Boson? I know that neither of them interact with the Higgs field. And that when CERN found the Higgs Boson, it decayed into other particles INCLUDING photons. So what's the...

Homework Statement Calculate the ratio ##R = \frac{\sigma_{had}}{\sigma_{\mu+\mu-}}## for energy around ##10~GeV##. At sufficiently high energies, the ##e^+e^- \rightarrow \mu^+ \mu^-## reaction can proceed via the ##Z^0## boson. Assuming vertex factors for EM and weak interaction are the same...

Do you believe the Higgs boson was already experimentally confirmed? I guess that, as with any elementary particle, the Higgs boson should have a lot of theoretical properties that must all be experimentally confirmed to be sure it is Higgs' and not some other entity. Have the scientists...

I have read that W boson get their energy (mass) by temporarily breaking the energy conservation laws in accordance with the Uncertainty principle. I have also read that the W bosons get their mass through the Higgs mechanism. How are these two things reconciled? Is this the distinction...

i have been researching this question and have so far not found a conclusive answer. i have read in a few places that bosons may even be their own anti particles, but a) i don't understand what this means, and b) this idea doesn't seem to be consistent between articles. hopefully someone on this...

from a malayalam language newspaper i read about Higgsboson that is according to standard model the Higgsboson is the piece of the atom that endows all the other piece with their mass. when electrons,quarks,etc are associated with higgs field they get mass. the light particle called photons have...

Homework Statement (a) Explain the results. (b) Why is the cross section much higher? Suggest the dominant decay product pair.[/B] Homework EquationsThe Attempt at a Solution [/B] Part(a) For a centre of mass energy of ##170GeV##, you produce pairs of oppositely charged ##W^{\pm},W^{\mp}##...

The Standard Model formula for the cross-section of ##e^+e^-\rightarrow\mu^+\mu^-## is made up of 3 components: QED interactions, weak interactions, and electroweak interference. I understand the behaviour of the QED part, and the resonance that occurs in the weak part at ##\sqrt{s}=M_Z##, but...

Hi there, As in Ta-Pei Cheng and Li's book for example the W boson propagator is given by : ## \frac{-i}{k^2-M^2} [g_{\mu\nu}+ (\zeta-1) k_\mu k_\nu/(k^2 - \zeta M^2)] ## At the unitary gauge ## \zeta = \infty ##, where the W propagator becomes : ## \frac{-i}{k^2-M^2} [g_{\mu\nu}- k_\mu...

How does scientist determines the energy of gauge boson or its spin? Is there any formulas involve?

I have a question that is very basic and could not seem to find it online or I have not searched the right way. What is the propagator of a scalar boson? I found that of a fermion line and that of a vector boson but could not find that of a scalar boson.

Hey guys! How can this sentence be explained and what does it mean? If the couplings $$Z\nu_{\alpha}\bar{\nu}_{\beta}$$ of the neutral intermediate boson to neutrinos are flavor preserving, they are also diagonal when expressed in terms of mass eigenstates $$Z\nu_{i}\bar{\nu}_{j}.$$

Hi, I'm working on an assignment in which the following reaction takes place: \nu_e e^- \rightarrow \nu_e e^- And I'm wondering whether its possible to have an electron neutrino and an electron annihilate to form a W^- boson, after which that boson decays into a \nu_e e^- pair...

http://www.huffingtonpost.com/2015/03/03/homer-simpson-higgs-boson_n_6793204.html?utm_hp_ref=media&ir=Media According to Simon Singh, in a 1998 episode the writers of the Simpsons had Homer in front of blackboard with a supposedly accurate calculation of the mass of the Higgs boson. Hmm...