Walt Disney Co. announced on Monday the 11 early-stage entertainment and media technology companies chosen to participate in its new business accelerator. The Burbank company is partnering on its Disney Accelerator with Techstars, a Boulder, Colo. accelerator with similar arrangements with sports apparel manufacturer Nike Inc., telecommunications giant Sprint Corp. and London financial services firm Barclays plc. During the 15-week program, the companies will meet with mentors regularly and work together to build and expand business plans, product launches, marketing campaigns, and long-term strategies. The companies will also receive up to $120,000 in financing from Disney. Among the companies picked were Buzzstarter, a content marketing platform; video sharing software developer Jogg; Tyffon, an entertainment app developer; and Ubooly, a customized educational toy for children. “With Disney Accelerator we are now bringing the creativity and imagination of Disney to early-stage startups in a way we have never done before,” Kevin Mayer, executive vice president of corporate strategy and business development, said in a prepared statement. Shares closed down 25 cents, or less than 1 percent, to $86.59 on the New York Stock Exchange.