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0 votes
0 answers
59 views

What are the characteristics of a non-relativistic collision?

I have a physics test tomorrow on special relativity and one of the questions on the previous test was as follows: "A particle of mass m hits another particle of the same mass that was originally ...
fiene's user avatar
  • 1
0 votes
1 answer
49 views

Mandelstams for $2\to 2\to 3$ process

2 initial particles become two other particles, from which one decays into 2. Let $p1$ and $p2$ be the momenta of the initial particles, $p3$ the momentum of the decaying particle, $p5$ and p6 the ...
Ville Alanko's user avatar
0 votes
2 answers
117 views

Is 4-momentum conservation used in this answer?

In Dale's answer to the collision rest mass problem, how is he concluding that the momentum 4-vector of the resulting particle is equal to the sum of the 4-momentums of the incoming particles. I am ...
JohnA.'s user avatar
  • 1,713
0 votes
0 answers
51 views

Time of relativistic scattering

Consider a scattering collision between a relativistic electron and a Hydrogen atom, which is assumed to be in the ground state. Assume that the electron velocity is comparable to the speed of light $...
MusashiK's user avatar
1 vote
1 answer
74 views

Threshold Energy for Creation of Electron-Positron Pair from Collision of Electron Pair

In short: $$ e^{-}+e^{-} \rightarrow e^{-}+e^{-}+\left(e^{-}+e^{+}\right) $$ My professor discussed this example in class in a Special Relativity Lecture. He used conservation of four vector momentum. ...
Klegzart's user avatar
2 votes
1 answer
2k views

If the oh-my-god particle hit you, would you notice?

I was reading about the 'OMG particle' and was wondering what would happen if it hit a person (before it went through the atmosphere). I did a search and most answers said you wouldn't notice. Which ...
Daniel's user avatar
  • 265
1 vote
0 answers
30 views

Energy conservation and Lorentz invariants [closed]

In relativistic collision theory,How can we deduce energy is conserved by using Lorentz transformation?
Sanket Thakkar's user avatar
0 votes
2 answers
252 views

What is the combined mass of two relativistic particles inelastically colliding into a singular relativistic particle?

A perfectly inelastic central collision of two equal relativistic particles whose kinetic energies are equal to their resting energies results a single relativistic particle (and nothing but it). The ...
pat._'s user avatar
  • 1
1 vote
3 answers
136 views

Electron-positron annihilation in two inertial frames

I have a question about the electron-positron annihilation example worked out in Greiner's Classical Mechanics, vol. 1, p. 468 (English edition). If we consider an electron-positron collision in the ...
user373714's user avatar
1 vote
0 answers
90 views

Feynman physics relativistic mass

Here is the page I read from Feynman physics. My question is when we ride along in a car moving with horizontal speed of the particle one then we get situation in fig 16-3a, according to last section ...
Xiang Li's user avatar
  • 329
0 votes
1 answer
170 views

Minimum four-momentum for particles colliding

This comes from Griffiths' Introduction to Elementary Particles. After introducing the reader to four-momentum, he provides us with this example problem: The Bevatron at Berkeley was built with the ...
WaterDrop's user avatar
  • 179
0 votes
1 answer
124 views

Head-on collision between electron and proton? [closed]

There was head-on collision between electron with 60 GeV and proton with 800 GeV. When considering relativity, how can calculate center of mass frame energy after collision?
eastern's user avatar
2 votes
0 answers
232 views

Relativistic conservation of momentum in an elastic collision

I am reading from Townsend's Quantum Physics (not Mechanics). In frame $S'$ there are two masses of mass $m$ that elastically collide along the $x$-axis. The masses rebound perpendicular to their ...
Silly Goose's user avatar
  • 2,676
0 votes
1 answer
100 views

Why does Pseudorapidity distribution have two peaks?

I found plots(fig2) that state that it is the sum of two gaussian distributions, but I am not able to understand its physical significance. Any help would be appreciated.[PS Why does rapidity not have ...
hawexrutile's user avatar
1 vote
1 answer
813 views

On physical interpretation of Mandelstam variables

The accepted answer to this post gives a nice physical explanation of the Mandelstam variables. The only problem is that each variable seems to make sense only within a specific channel. Take the $t$ ...
ric.san's user avatar
  • 1,644

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