John Clements Collins (born 1949) is a British-born American theoretical physicist and professor of physics at Pennsylvania State University.
From 1990 to the present, he has been a faculty member in the department of physics at Pennsylvania State University where he currently holds the position of distinguished professor.
[1][2] He is a Fellow of the American Physical Society and received the Guggenheim Fellowship in 1986.
[2] In 2009, he was awarded the Sakurai Prize along with R. Keith Ellis and Davison E. Soper.
[7] The Collins mechanism was proposed to explain the existence of transverse spin dependence in hadron collisions.