New answers tagged higgs
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votes
Mass terms for scalar lagrangians?
I'm a little rusty on this (since 2008, it's 2022) and I am not an expert, but a vector boson should have a field $A^\mu$ or $G_a^\mu$ depending whether it's a photon or a gauge boson, where the $\mu$ ...
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2
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How (if) are the Higgs scalar and the $W/Z$ vectors related (apart from interaction)?
To the best of anybody's knowledge, the mass of the Higgs, $O(\sqrt{\lambda}v)$, and the masses of the gauge bosons, $O(gv)$, generated by the Higgs mechanism, are absolutely unrelated in the SM. ...
- 47.3k
3
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Are the particles in the zero-energy Higgs field real or virtual?
Do not confuse the concept of a field in the quantum field theory of particle physics, the standard model, with the particles that creation and annihilation operators create and annihilate on those ...
- 221k
2
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Accepted
What is wrong with the dependence of result with the order of the operation in my computation of Higgs sector derivative term?
It is straightforward notation. Recall the rules for transposing product orders in the adjoint.
First approach
$$\left(\partial_{\mu}\Phi\right)=
\left(
\begin{array}{cc}
\partial_{\mu}\phi^{+}\\
\...
- 47.3k
1
vote
Does the Higgs field have an energy?
Higgs field is the result of a charged scalar field (where scalar means that it has no spin, charged means that it has a charge for the interaction you want to give mass) which oscillates around a ...
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What is the mathematical expression for the Higgs boson coupling constant?
This article notes that particles can exert a force on one another via the Higgs field and assigns a dimensionless coupling constant (of the same form as the examples given):
\begin{equation}
\alpha_{...
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1
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What is the mathematical expression for the Higgs boson coupling constant?
The Higgs boson does not have a separate coupling to the rest of the particles in the table of elementary particles. The magnitude of the coupling is a combination of the weak and the electromagnetic ...
- 221k
3
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Why is the decay channel $H \to \gamma\gamma$ direct evidence that the spin of the Higgs must be different from one?
In simple terms :
Spin had to be invented and assigned studying the interactions of elementary particles because of conservation of angular momentum. There are three laws which go through all physics ...
- 221k
3
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Why is the decay channel $H \to \gamma\gamma$ direct evidence that the spin of the Higgs must be different from one?
You surely learned at the beginning of your elementary particles' course that the two photons are bosons, so the γγ state is symmetric in them.
Addition of two spin 1 states yields a spin s=1 only ...
- 47.3k
0
votes
Accepted
How can a flavour changing neutral current be drawn for the higgs decay to two down-type quarks?
You were already on the right track.
But in your Feynman diagram you have drawn the $u$ an $\bar{s}$
as incoming particles, instead of outgoing.
So your diagram actually describes the process
$$h+d+\...
- 25.8k
10
votes
Accepted
Two questions about the Higgs decay mode graph
Based on the date (2013), I assume this figure was made before the Higgs was discovered or its mass was published. The curves are based on a theoretical calculation of the various branching ratios as ...
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