If a reaction involving hadrons were written at the quark level as $\overline u { \text { d } } + \text { uud } \rightarrow \mathrm { d } \overline { \mathrm { s } } + \text { ? }$ ,what is the quark composition of the unknown last particle?
A) udd
B) $\text{ ud}\overline { d}$
C) uds
D) $\text { ud}\overline { s}$
E) More information is needed.

Question

Quizplus · Accepted Answer

The reaction involves the annihilation of an anti-up quark with an up quark and a down quark to form a virtual W boson. The W boson then decays into a strange antiquark and a down quark. The only way to conserve charge and baryon number is for the unknown particle to be composed of an up, down, and strange quark, making the answer uds.

If a Reaction Involving Hadrons Were Written at the Quark u‾ d + uud →ds‾+ ? \overline u { \text { d } } + \text { uud } \rightarrow \mathrm { d } \overline { \mathrm { s } } + \text { ? }u d + uud →ds+ ?

If a Reaction Involving Hadrons Were Written at the Quark $\overline u { \text { d } } + \text { uud } \rightarrow \mathrm { d } \overline { \mathrm { s } } + \text { ? }$