The mass of the antileptons is identical to that of the leptons, but all of the other properties are reversed. A third characteristic feature of leptons, in addition to their charge and mass properties, is their intrinsic angular momentum, or spin. Leptons are classified within a larger group of subatomic particles, the fermions, which are characterized by half-integer values of their spin.
Trick and Treat: Halloween in Italy. 28th October 2015. Itâs nearly that spooky time of year again. Although Halloween is renowned around the world as a holiday loved by the Americans (their holidays are celebrated bigger and better than anywhere else) it is becoming more and more popular in Italy.
Today at its 84th edition, the Feast was instituted in September 19, 1926 when newly arrived immigrants from Naples settled in Mulberry Street in the Little Italy section of New York City and brought with them the tradition to celebrate the day when Saint Gennaro was martyred for his faith, September 19 305 A.D.