I recall watching a documentary a while ago that explained the production of different force carriers. A bit that stuck in my head was that (if I remember correctly) W and Z bosons were able to violate the law of energy conservation. The energy to create these particles was apparently 'borrowed'. It explained that the more energy is borrowed, the less time the particle can survive which is why these bosons have such a small range. A large amount of energy is required due to their large mass so the energy can only be 'borrowed' for a very small amount of time compared to other force carriers. Is this correct? I'm not able to find any more information about it. I don't know the the information was wrong or if it was just dumbed down so much that it became very inaccurate. Thanks.