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- cosmology - Baryon asymmetry - Physics Stack Exchange
This is quantified using the asymmetry parameter $\eta = \frac{n_{baryon} - n_{antibaryon}}{n_{photon}}$ From cosmological measurements such as WMAP, $\eta \approx (6 \pm 0 25) \times 10^{-10}$ However, the source of baryon asymmetry is said to be one of the Big Problems of Physics What is currently the state of the art regarding this puzzle?
- What Does Up-Down Asymmetry Mean? - Physics Stack Exchange
As I understand the matter, the existence or non-existence of up-down asymmetry in charmed baryon decays is not a trivial consequence of the physical laws that make up the Standard Model of particle physics (unlike, for example, lepton universality where recent experimentally results have appeared to show violations of this principle at lower
- Origin of XRD Peak Asymmetry - Physics Stack Exchange
Ideally the peaks should be symmetric so my question is what is the main origin of asymmetry in the peaks? My best guess is it is some small misalignment which means one side of the peak will receive a higher intensity and vice versa, which is consistent with all of my peaks, however I'm not sure if this is definitely it
- What is the value of the baryon asymmetry? [duplicate]
Define the baryon asymmetry, which sometimes is called the baryon density, as the baryons to photons ratio $\eta = n_b n_\gamma$ I found in Ref 1, published in 2018, that the value of $\eta$ is of order $ 6 1 \pm 0 3 \times 10^{-10} $ by observing the cosmic microwave background experimentally by Planck satellite
- Asymmetry Term in the Semi-Empirical Mass Formula
Could someone explain to me in simple terms what the asymmetry term means and how it is derived I don't really want a full fledged mathematical derivation, but more the basic principle and idea behind it I have been looking at a derivation in a book, but it is proving quite difficult for me to understand
- What is $U (1)$ symmetry? - Physics Stack Exchange
$\begingroup$ One thing I might add, just for completeness: the reason we see the idea of "groups" pop up when we're looking at symmetry is because group theory is mathematics' discipline for modeling the effects of symmetries
- electromagnetism - Whats the reason behind asymmetry of magnetic field . . .
Why this asymmetry? Well, that is how the magnetic field $\vec{B}$ is defined Both $\vec{E}$ and $\vec{B}$ are not relativistically invariant and are different aspects of one "electromagnetic field" In terms of direction of the fields there is no asymmetry there
- What is the difference between Rashba spin-orbit coupling and . . .
Dresselhaus SOI is caused by the Bulk Inversion Asymmetry (BIA) where the crystal itself lacks an inversion center (e g Zinc Blende structures) Here is a reference that explains how Rashba and Dresselhaus SOI are derived in semiconducting heterostructures using Kane model Fabian, J , Matos-Abiague, A , Ertler, C , Stano, P , Žutić, I
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