Add ground beef to a large Dutch oven set over medium-high heat. Cook the beef for 5-6 minutes, crumbling it as it cooks, until it begins to brown. Drain off any excess fat.
Reduce the heat to medium, then add the green pepper, onion, and garlic and cook for 3-4 minutes, stirring occasionally, until the vegetables are softened.
Season the mixture with chili powder, paprika, cumin, salt, pepper, and cayenne. Stir in the tomato paste and cook for 1-2 minutes. Add the broth and deglaze the pot with a wooden spoon, reduce for about 2 minutes.
Stir in the diced tomatoes, tomato sauce, Worcestershire sauce, and sugar. Bring the mixture to a boil, reduce the heat, cover, and simmer for at least 20-25 minutes.
Taste and season if necessary, then serve with your favorite sides and toppings.