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 B − L In high energy physics, B" − "L (pronounced "bee minus ell") is the difference between the baryon number ("B") and the lepton number ("L"). This quantum number is the charge of a global/gauge U(1) symmetry in some Grand Unified Theory models, called U(1). Unlike baryon number alone or lepton number alone, this hypothetical symmetry would not be broken by chiral anomalies or gravitational anomalies, as long as this symmetry is global, which is why this symmetry is often invoked. If exists as a symmetry, it has to be spontaneously broken to give the neutrinos a nonzero mass