Re: A kaon is at rest, why would the pions have a momentum when it decays.

Date: Fri May 14 09:15:05 1999
Posted By: Dave Dixon, Assistant Research Physicist,University of California
Area of science: Physics
ID: 926443598.Ph

Message:


I'm presuming you mean the pions *individually*
have momentum.  The total momentum is still zero, i.e.,
if you add the individual momenta they all cancel.
Remember that momentum is a vector quantity, i.e.,
has direction and size.  Thus, if two particles
had momenta of 1 g cm/s in opposite directions,
the total momentum of the system is zero.

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