Lab frame and accelerator frame

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Discussion Overview

The discussion revolves around the calculation of luminosity in different reference frames, specifically the boost frame versus the lab frame, and the understanding of coordinate systems used in particle physics, including the azimuthal coordinate.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions the necessity of calculating luminosity in the boost frame rather than the lab frame, suggesting that calculations might be simpler in the lab frame.
  • Another participant references slide 10 to explain the reasoning behind the choice of the boost frame for luminosity calculations.
  • A participant seeks clarification on the azimuthal coordinate 's' as presented in slide 9, indicating a lack of understanding of its geometric implications.
  • It is noted that the definition of the azimuthal coordinate 's' can be found on page 7 of the referenced material.

Areas of Agreement / Disagreement

Participants express differing levels of understanding regarding the choice of reference frames and the azimuthal coordinate, indicating that multiple views and uncertainties remain in the discussion.

Contextual Notes

Some participants may be missing foundational knowledge regarding the definitions and applications of the lab frame, accelerator frame, and boost frame, which could affect their understanding of the luminosity calculations.

Ruihu Zhu
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TL;DR
Can someone explain lab frame ,accelerator frame and boost frame to me?
In the file I present below,it shows a way to calculate luminosity in boost frame when crossing angle exists.I can't understand why luminosity calculation is done in boost frame instead of lab frame where calculations are much easier.I also have difficulty understanding lab frame,accelerator frame and boost frame.Can someone take a glance at the file and help me with it?
 

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They explain why on slide 10.
 
Vanadium 50 said:
They explain why on slide 10.
In slide 9,it shows accelerator coordinate is (x,y,z,px,py,pz;h,s) where s is azimuthal coordinate.I can't understand azimuthal coordinate s in geometry.Can you explain?Thanks
 
s is defined on page 7.
 
You're welcome.
 

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