Back in Boston, Dr. Robyn Riseberg and her husband, Doug, had a couple of beers, decided the stars were aligned, and celebrated the World Series championship in their own way. ''I will not refute that," said Riseberg, blushing slightly. Now, there's living proof. Emma Smith Riseberg, 5 pounds 5 ounces, was born June 18 at Beth Israel Deaconess Medical Center. She is the first known baby conceived after the Red Sox won the world championship.