Higgs Boson and related doubts
According to wikipedia, the higgs boson particle has a mass of approximately 126.5GeV/c^2.
1. First of all, i’m not sure why they use a unit of energy for the mass. I know of energy mass equivalence, but doesn’t something with a lot of energy have the potential to be converted into mass but it isn’t mass yet?
2. Also, i’m not sure how the higgs boson can have a mass at all if it is the particle that gives things mass. Do all higgs boson particles then have to come in pairs so that they can interact with each other? Can a higgs particle exist on its own?
3. Also, when the higgs particles interact (either with objects or with themselves if they can), what is transferred between them? For example, a photon is exchanged between two electrons when they interact. So what is exchanged between a higgs boson and an object? Is it strings like in string theory?
Thank ou in advance for any replies.