The neutrino interaction.

    The neutrino interaction. 

The term right-handed particle means that the particle spins clockwise relative to the direction axis. The left-handed particle spins anticlockwise relative to its direction axis. The particles and their antiparticle pairs have opposite spin directions. When a particle and its antiparticle-pair impact, that thing causes annihilation or both particles turn into energy. 

The only known particle that has no spin is Higgs Boson. The lifetime for that particle is so short that it has no time for spin. So Higgs Boson's spin is 0. 

Neutrinos are left-handed particles. And that causes their weak interaction with other particles. The right-handed and left-handed particles are turning their south poles against each other. And that thing causes very weak interactions between those particles. That thing means that the neutrinos repel other particles like magnets repel the same poles.

So that thing makes neutrinos able to travel through planets without reactions. When neutrino impacts the planets or other walls it pushes other particles away from its route. The thing that causes interaction is the quark, which is straight in the neutrino's route. 

Without that impact, neutrinos don't react. The particle that slows the neutrino must be at the transversely to the neutrino's axis. Or the interaction is not strong enough that it can make blue light flash. The neutrino's left-handed spin is a remarkable thing. There is the possibility that neutrinos are remnants of antimatter that annihilated with material in the young universe. 

When annihilation happened, neutrinos remained because they had no existing antiparticles. Or there were more left-handed neutrinos than right-handed neutrinos. That asymmetry formed one of the most unusual and fascinating particles that exists in the universe. Sometimes the neutrino's name turns into a "grey photon" because it's like a particle between a photon and other particles. 

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Photon has many similar abilities to neutrinos. But there is one different thing. The photon's spin is 1. And its spin states are  -1 or +1. That means photons can be right- or left-handed. That ability to change the spin direction causes a situation. That the photon can turn into the N/S position to other particles. That two-handed ability makes energy flow through photons. 

Because energy travels from another side to another it causes energy stability to photons. Energy stability means that a photon is the only thing that can travel with the speed of light. The reason why photons cannot travel through walls or planets is that. The other particles come too close to the photon. The energy flow would impact photons into both sides and press it to tape-looking wave movement. 

In the standard model photon is the only stable particle in the universe. The electron is virtually stable because its lifetime is very long. Other long-lived particles are virtually stable, but the only known stable particle is photon. The problem is that the energy flow that travels through photons makes it stable. And nobody knows what happens when photons will go outside the universe. 

It's possible. That photons can annihilate. If a photon, with a spin state is 1 impacts with a photon with that spin state of -1. But that thing could happen only when there is no radiation. In a normal universe, the higher energy photon turns the spin state of the lower energy photon to the same as it has. The requirement for hypothetical photonic annihilation would be that those photons have the absolute same energy level. 

Another thing is that a photon cannot slow its speed because it releases as much energy as it gets. The neutrino's spin is 1/2. That means its spin is locked. The ability to travel even through planets is the reason for that slow spin. 

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In some models, other elementary particles can turn into photons. The thing that could make that thing is the curvature in spacetime. In gravitational models, gravitation is like a funnel around the gravitational center. Curvature in spacetime means that energy turns denser. When a particle travels in that 3D- or ball-shaped funnel energy presses it smaller and smaller. So in that model, the electron turns into a photon when its energy level rises high enough and that funnel presses it into a photon. 

When a particle travels across space, information or energy touches it like plaque. That thing forms the kinetic energy. Particles spin around its axle transporting a little part of that energy out from it. When a particle spins it forms an energy pike to its rotation axle. That energy pike pushes the quantum field out from its poles. 

And that causes a situation where there is a small electromagnetic or quantum low pressure near that thing. That bubble pulls energy away from the particle's poles or rotation axle. The interaction between neutrino and other particles is weak because neutrino's spin is so weak and that causes a situation where neutrino is almost in the energy balance between it and its environment. 

The energy balance between a photon and its environment causes a situation. That photon is the only particle that can reach the speed of light. When a photon gets energy it releases it immediately. The photon's spin is -1 which means that the photon can be left- or right-handed. That causes a situation in which photons can channel energy through it. And that can cause the special form of that particle. 

https://atlas.cern/glossary/handedness

https://en.wikipedia.org/wiki/Higgs_boson

https://en.wikipedia.org/wiki/Neutrino

https://en.wikipedia.org/wiki/Photon

https://en.wikipedia.org/wiki/Spin_(physics)