Round 9: Tossup 14

Pohl et al. measured a smaller than expected value for this particle’s radius when observing a system of it (15[1])and a muon, (15[1])causing its “radius (15[1])puzzle.” (15[1])An earlier experiment involving a muon beam found that this particle’s spin was greater than the total spin of its components in its namesake “spin crisis.” (15[1])This particle is hypothesized to decay into a positron and neutral pion on the order of (*) 10 to the 34 years. The Coulombic repulsion between these particles causes isotopes with too many of them to be unstable. This particle consists of two up quarks and one down quark. For 10 points, name this positively charged subatomic particle. ■END■

Back to tossups

Buzzes

Summary