One type of hadron consists of two down quarks and one up quark - Scottish Highers Physics - Question 8 - 2016

To find the total charge of the hadron, which has two down quarks and one up quark, we calculate as follows:

Each down quark contributes -rac{1}{3}, and the up quark contributes +rac{2}{3}. Therefore, the total charge (Q) is:

$Q = 2 \times \left(-\frac{1}{3}\right) + 1 \times \left(+\frac{2}{3}\right)$

Calculating this gives:

$Q = -\frac{2}{3} + \frac{2}{3} = 0$