Natura - nature actualia - actual entities Mundus Plinius - physical world particles hadrons - composite particles mesons - bosonic hadrons light unflavored mesons 01.1 π+ - positive pion 01.2 π− - negative pion 02 π0 - neutral pion 03 η 04 f0(600) 05.1 ρ(770)+ 05.2 ρ(770)− 05.3 ρ(770)0 06 ω(782) 07 η'(958) 08 f0(980) 09.1 a0(980)+ 09.2 a0(980)− 09.3 a0(980)0 10 φ(1020) 11 h1(1170) 12.1 b1(1235)+ 12.2 b1(1235)− 12.3 b1(1235)0 13.1 a1(1260)+ 13.2 a1(1260)− 13.3 a1(1260)0 14 f2(1270) 15 f1(1285) 16 η(1295) 17.1 π(1300)+ 17.2 π(1300)− 17.3 π(1300)0 18.1 a2(1320)+ 18.2 a2(1320)− 18.3 a2(1320)0 19 f0(1370) 20.1 π1(1400)+ 20.2 π1(1400)− 20.3 π1(1400)0 21 η(1405) 22 f1(1420) 23 ω(1420) 24.1 a0(1450)+ 24.2 a0(1450)− 24.3 a0(1450)0 25.1 ρ(1450)+ 25.2 ρ(1450)− 25.3 ρ(1450)0 26 η(1475) 27 f0(1500) 28 f'2(1525) 29.1 π1(1600)+ 29.2 π1(1600)− 29.3 π1(1600)0 30 η2(1645) 31 ω(1650) 32 ω3(1670) 33.1 π2(1670)+ 33.2 π2(1670)− 33.3 π2(1670)0 34 φ(1680) 35.1 ρ3(1690)+ 35.2 ρ3(1690)− 35.3 ρ3(1690)0 36.1 ρ(1700)+ 36.2 ρ(1700)− 36.3 ρ(1700)0 37 f0(1710) 38.1 π(1800)+ 38.2 π(1800)− 38.3 π(1800)0 39 φ3(1850) 40.1 π2(1880)+ 40.2 π2(1880)− 40.3 π2(1880)0 41 f2(1950) 42 f2(2010) 43.1 a4(2040)+ 43.2 a4(2040)− 43.3 a4(2040)0 44 f4(2050) 45 f2(2300) 46 f2(2340)