1. The problem statement, all variables and given/known data A hadron has the quark content [tex]\ u [/tex][tex]\ d^- [/tex].Find the baryaon number,charge,spin and strangeness of this hadron.Can you identify this hadron? 2. Relevant equations 3. The attempt at a solution baryon number=(1/3)+(-1/3)=0 [u is particle but d bar is antiparticle] charge= +(2/3)+(1/3)= +1 [dbar is the antiparticle of d,whose charge is -(1/3)] Spin=0 [as the hadron is a meson] Strangeness= 0 The hadron is a positive pion. Please check if it is correct.