ISTANBUL, Sept 15 (Reuters) - Turkey"s central bank said on Wednesday that it has formed the Digital Turkish Lira Collaboration Platform to expand its research into the potential benefits of a digital currency. The bank said it signed separate memorandums of understanding with Turkey"s HAVELSAN, ASELSAN and TUBITAK-BILGEM for the platform, which will carry out the research, development and testing processes. It said no final decision has been made about a digital Turkish lira currency and that the results of the first phase of the pilot study will be announced in 2022.