I was looking at the list of the force carrying particles and all of their masses read zero other than the W boson of the weak nuclear force. Q: Does the W boson travel at the speed of light even if it is massive? (I am guessing not) Q: If the W boson is massive then it emits other gauge bosons in a gravitational field. How can this be? A boson emit other bosons? Q: Does the W boson have spin or charge? Thank you for answering.