The meson having which of the following quark contents is electrically neutral?
A) $s\overline { c }$
B) $a \bar { u }$
C) $\mathcal { u }\bar { a }$
D) $b \bar { c }$
E) $c \bar { u }$

Question

The meson having which of the following quark contents is electrically neutral?
A) $s\overline {  c }$
B) $a \bar { u }$
C) $\mathcal { u  }\bar { a }$
D) $b \bar { c }$
E) $c \bar { u }$

Quizplus · Accepted Answer

A meson is made up of a quark-antiquark pair. In order for the meson to be electrically neutral, the charges of the quark and antiquark must cancel out. The quark content of choice E, $C\bar{U}$, consists of a charm quark and an up antiquark. The charm quark has a charge of +2/3 and the up antiquark has a charge of -2/3, which cancel out to give a neutral overall charge.

The Meson Having Which of the Following Quark Contents Is sc‾s\overline { c }sc

The Meson Having Which of the Following Quark Contents Is $s\overline { c }$