Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 251538

propagator gives the probability amplitude for a particle to travel from one place to another in a given time, or to travel with a certain energy and momentum.

2 votes
0 answers
91 views

LSZ reduction formula valid for any type of observables?

P&S on page 213 arrive at the following identity for the two-point function (eq. 7.5) $$\langle \Omega|\phi(x)\phi(y)|\Omega\rangle={\sum_{\lambda} \int \dfrac{d^4p}{(2\pi)^4}\dfrac{ie^{-ip.(x-y)}}{p^ …
Leonid's user avatar
  • 395