Final answer:
Richard Hamilton is the English artist who published the characteristics of Pop Art in 1957, defining a movement that utilized mass culture, consumerism, and media imagery.
Step-by-step explanation:
The English artist who published a list of characteristics of Pop Art for London artists in 1957 was Richard Hamilton. Pop Art emerged both in England and the United States during the post-war era of the 1950s and 1960s as a revolutionary movement that challenged conventional art by drawing heavily on mass culture, consumer goods, and the media. This included everyday objects and imagery ranging from comic books to advertising. It presented a stark contrast to abstract expressionism, using bright primary colors and reflecting a commercial and realistic aesthetic. The Illustrative artist Richard Hamilton was particularly intrigued by the glossy images of American consumer abundance that permeated the era's mass culture. He used this inspiration to articulate the defining characteristics of Pop Art, thus contributing to one of the most significant art movements of the 20th century.