Sujet : Re: Positrons
De : ram (at) *nospam* zedat.fu-berlin.de (Stefan Ram)
Groupes : sci.physics.relativityDate : 08. Jul 2025, 21:16:04
Autres entêtes
Organisation : Stefan Ram
Message-ID : <plus-20250708211533@ram.dialup.fu-berlin.de>
References : 1 2 3 4 5 6 7 8
ram@zedat.fu-berlin.de (Stefan Ram) wrote or quoted:
If one would try to correct the vagueness of "mass is converted into
energy" by saying, "the mass of 'γ + γ' is smaller than the mass
of 'e⁺ + e⁻'" (thereby saying "of what"), then this would be wrong.
And, not to be vague, one also needs to explain what "+" means here.
In QT, it would be the tensor product, and, in QFT, the application
of two creation operators with the corresponding momenta and spins to
the vacuum state. I.e., "e⁺ + e⁻" is the compound system, the mass of
which differs from the sum of the two components taken in isolation.