From the article:
'The particle was named for Peter Higgs, one of the physicists who proposed its existence, but it later became popularly known as the "God particle."'
Calling it the "God particle" is an insult to science, and "Higgs Boson" is definitely the more popular term. Here's the adword keyword analysis for both: http://imgur.com/dsNVbum
"Higgs Boson" as a search term is 4.078 times more popular globally and 3.322 times in the US.