What surgical procedure creates a new connection between the stomach and the jejunum?

The procedure that creates a new connection between the stomach and the jejunum is known as gastrojejunostomy. This surgical operation is performed when a direct connection is needed to allow food to bypass the duodenum, often due to conditions like gastric outlet obstruction or certain types of cancer. During a gastrojejunostomy, the jejunum (the second part of the small intestine) is surgically attached to the stomach, facilitating the flow of digestive contents directly from the stomach into the jejunum.

Other surgical procedures listed do not involve creating a connection specifically between the stomach and jejunum. For instance, a colostomy involves creating an opening from the colon to the abdominal surface, and a herniorrhaphy is a repair of a hernia. An appendectomy is the removal of the appendix. Each of these procedures serves different purposes and is related to different parts of the digestive system or other areas of the body, making gastrojejunostomy the specific operation that fits the description provided in the question.