Do Particles and Antiparticles Obey All Known Physical Laws?

Thread starter anuj
Start date Oct 18, 2004
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Particle

In summary, particles and anti-particles are well-understood and have been extensively studied through various applications such as PET scans and particle colliders. They follow the same laws of physics, with a slight difference in properties that is not fully understood. The concept of negative energy and the role of antiparticles in electrodynamics and gravity have been explored, but there is still much to be discovered and understood. There are various resources available on the internet to learn more about these concepts.

Nov 2, 2004

gptejms

marlon said:

So basically a propagator expresses the probability that a particle with positive energy created in x' on t' will propagate to place x on time t. This is valid for t > t'. If t < t', then the propagator expresses the probability that a particle with negative energy created in x' on t' will propagate BACKWARDS in time to x on some time t. It is the SUM of both these probability-amplitudes that is relativistically invariant !

Can you write down the propagator(math. expression) for Dirac field and then explain each term

<h2>What are particles and antiparticles?</h2><p>Particles and antiparticles are two types of subatomic particles that make up the building blocks of matter. They have the same mass and spin, but opposite electric charge and other quantum numbers.</p><h2>How are particles and antiparticles created?</h2><p>Particles and antiparticles can be created through high-energy collisions, such as those that occur in particle accelerators. They can also be created through certain types of radioactive decay.</p><h2>What happens when a particle and antiparticle meet?</h2><p>When a particle and antiparticle meet, they can annihilate each other, releasing energy in the form of gamma rays. This process is known as annihilation.</p><h2>Why are particles and antiparticles important in understanding the universe?</h2><p>Particles and antiparticles play a crucial role in understanding the early universe and the processes that govern it. They also help explain the fundamental forces that govern the interactions between particles.</p><h2>What is the difference between matter and antimatter?</h2><p>The main difference between matter and antimatter is that they have opposite charges. Matter is made up of particles with positive charges, while antimatter is made up of particles with negative charges. This difference is what allows them to annihilate each other when they come into contact.</p>

What are particles and antiparticles?

Particles and antiparticles are two types of subatomic particles that make up the building blocks of matter. They have the same mass and spin, but opposite electric charge and other quantum numbers.

How are particles and antiparticles created?

Particles and antiparticles can be created through high-energy collisions, such as those that occur in particle accelerators. They can also be created through certain types of radioactive decay.

What happens when a particle and antiparticle meet?

When a particle and antiparticle meet, they can annihilate each other, releasing energy in the form of gamma rays. This process is known as annihilation.

Why are particles and antiparticles important in understanding the universe?

Particles and antiparticles play a crucial role in understanding the early universe and the processes that govern it. They also help explain the fundamental forces that govern the interactions between particles.

What is the difference between matter and antimatter?

The main difference between matter and antimatter is that they have opposite charges. Matter is made up of particles with positive charges, while antimatter is made up of particles with negative charges. This difference is what allows them to annihilate each other when they come into contact.