Proton antiproton at 2 GeV

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In summary, the conversation discusses the energy released from proton antiproton annihilation at rest and at 2 GeV. It is mentioned that the 1.8 GeV energy released at rest does not equal the 2 GeV total center of mass energy, which includes the masses of the particles. The questioner realizes their mistake of thinking the 2 GeV is solely kinetic energy and the responder clarifies that it is larger than the rest energy.
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DaveSmith
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According to fermilab link
http://www.fnal.gov/pub/inquiring/questions/antimatter1.html

Proton antiproton annihilation at rest releases 1.8 GeV energy, but compare this to annihilation at 2 GeV,

http://en.wikipedia.org/wiki/Proton_antiproton_annihilation#Proton-antiproton_annihilation_at_2.C2.A0GeV

The energy released if we add the kinetic energy of the photons would come close to the same amount of energy observed at rest, shouldn't it be more? where am i wrong?
 
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Believe that you just made the mistake of thinking about the 2GeV as kinetic energy. The 2 GeV is the total center of mass energy, which includes the masses of the proton and antiproton. And indeed, the 2GeV is larger than the rest energy of 1.8GeV.

hope I could help
Chao
 

1. What is a proton antiproton collision at 2 GeV?

A proton antiproton collision at 2 GeV refers to a high-energy collision between a proton and an antiproton at a center-of-mass energy of 2 GeV (gigaelectronvolts). This type of collision is typically studied in particle accelerator experiments, such as those at CERN, to investigate the fundamental building blocks of matter and the forces that govern their interactions.

2. How is 2 GeV determined as the collision energy?

The collision energy of 2 GeV is determined by the energy of the particles involved in the collision, in this case, protons and antiprotons. In particle accelerators, such as the Large Hadron Collider (LHC), the energy of the particles is controlled and increased through a series of accelerating structures until they reach the desired collision energy. 2 GeV is a relatively low energy in the world of particle physics, but it is still high enough to produce interesting and useful results.

3. What is the significance of studying proton antiproton collisions at 2 GeV?

Studying proton antiproton collisions at 2 GeV allows scientists to probe the properties of particles at this energy scale. This can provide insights into the behavior of matter and energy at a fundamental level and help us better understand the nature of the universe. Additionally, studying these collisions can also help us develop new technologies and medical treatments, such as cancer therapy using proton beams.

4. What can we learn from the data collected from these collisions?

The data collected from proton antiproton collisions at 2 GeV can provide valuable information about the structure of matter and the fundamental forces that govern the universe. This includes studying the behavior of subatomic particles, such as quarks and gluons, and their interactions. It can also help us test and refine existing theories, such as the Standard Model, and potentially uncover new physics beyond our current understanding.

5. How is the data collected and analyzed from these collisions?

The data from proton antiproton collisions at 2 GeV is collected by particle detectors, which are specialized instruments that measure the properties of the particles produced in the collision. The data is then analyzed using sophisticated software and algorithms to reconstruct the particles' trajectories and identify their properties. This allows scientists to study the particles' behavior and interactions, and ultimately gain a better understanding of the underlying physics at play.

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