en: Where is invariant mass and invariant energy equals . The squared mass is still stable and the particle can be positive . Where is invariant mass and invariant energy equal , the squared mass is still stable and the particle can be positive .
ms: Di mana jisim invarian dan tenaga invarian sama. Jisim kuasa dua masih stabil dan zarah boleh positif. Di mana jisim invarian dan tenaga invarian sama, jisim kuasa dua masih stabil dan zarah boleh positif.