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What is global fit in EW test

  1. May 3, 2010 #1
    I always hear that the "global fit" EW precision test. It seems that I understand it a little. But I am still very clear. Who can shed light on it?
  2. jcsd
  3. May 4, 2010 #2
    Can you expand a bit, your language is not quite correct.

    Do you have some examples on where you have read this?
  4. May 4, 2010 #3


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    afaik "global fit" means fitting data of different experiments from all over the world
  5. May 4, 2010 #4
    It can also refer to fitting several different experimentally-measured quantities (for example, masses of the W and Z bosons, Z boson partial decay widths and decay asymmetries) to extract parameters that appear in theoretical calculations of all of these quantities (such as the Peskin-Takeuchi S and T parameters).
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