Here is the issue; the polygraph was taken as a result of a request or order by the court or prosecutor since you are being charged with a crime. While polygraphs themselves cannot be submitted as direct evidence in most cases, they can be used to impeach your testimony in most cases. Therefore, the police can certainly use it (and may not need a warrant to seize it if the prosecutor asked for it). The prosecutor can certainly share it with the police investigator or even the arresting officer if it is going to be used as part of his testimony but whether the court will use that testimony substantively will depend on the questions asked and how the officer responds. Talk to your lawyer (criminal defense attorney) about this episode and see if your counsel can seek to have the polygraph test results suppressed if they turn out not to be good for you.