He may have, although probably after that story was written. Remember Azimov was a PhD scientist, Chemistry IIRC. The standard model was formalized in the mid '70s, and Higgs first paper on the particle that bears his name was written in '64. Azimov didn't pass on until April of 1992. (AIDS, he got HIV from a blood transfusion in '83 after heart surgery) So he had quite a while to become familiar with the Standard Model, which includes the Higgs. He probably wrote articles about it. I have his "Understanding Physics" in 3 separate hardcover volumes. He wrote an article "What's the Universe Made Of", for science digest published in 1980. It was about fields and particles, and he likely (I haven't read it that I recall) talked about the Higgs Boson, and/or Higgs field in that article.
I mean as of the story’s writing of course.