As reported in Jazz’s Downbeat magazine, Pianist Chick Corea, bassist/vocalist Esperanza Spalding, pianist Ahmad Jamal, saxophonist Kenny Garrett are among the artists nominated for the 55th Annual Grammy Awards. The nominations were announced on Dec. 5.  Among the usual suspects were some surprises this year, Ravi Coltrane  and Ahmad Jamal being nominated in Best Improvised Jazz…