Lyndon B. Johnson the Lyndon B. Johnson Space Center in 1973. Texas created a legal state holiday to be observed on August 27 to mark Johnson's birthday, known as Lyndon Baines Johnson Day. The Lyndon Baines Johnson Memorial Grove on the Potomac was dedicated on April 6, 1976. The Lyndon B. Johnson School of Public Affairs was named in his honor, as is the Lyndon B. Johnson National Grassland. Also named for him are Lyndon B. Johnson High School in Austin, Lyndon B. Johnson High School in Laredo, Lyndon B. Johnson Middle School in Melbourne, Florida, and Lyndon B. Johnson Elementary School in
B − L if we assume the seesaw mechanism. In the case of a gauged , the gauge bosons associated with this symmetry are commonly called X and Y bosons. The anomalies that would break baryon number conservation and lepton number conservation individually cancel in such a way that is always conserved. One hypothetical example is proton decay where a proton (; ) would decay into a pion (, ) and positron (; ). Weak hypercharge Y is related to via where X is the U(1) symmetry Grand Unified Theory-associated conserved quantum number. B − L In high energy physics, B" − "L