Definition: In particle physics, a boson is a type of particle that obeys the rules of Bose-Einstein statistics.omposite Bosons. 1  Mesons-Mesons are formed when two quarks bond together. 2  Since quarks are fermions and have half-integer spins, if two of them are bonded together, then the spin of the resulting particle (which is the sum of the individual spins) would be an integer, making it a boson.
Elk Grove, California. Elk Grove is a city in Sacramento County, California, located just south of the state capital of Sacramento. It is part of the SacramentoâArden-ArcadeâRoseville Metropolitan Statistical Area. As of 2015, the population of the city was estimated at 167,965.
Elk River is a city in Sherburne County, Minnesota, United States, about 34 miles northwest of Minneapolis. It is situated at the confluence of the Mississippi and Elk Rivers. The population was 22,974 at the 2010 census. It is the county seat of Sherburne County. The city's population exceeded 20,000 as of 2005.