WASHINGTON — The Treasury Department released a one-page analysis of the nearly 500-page Senate tax bill Monday that suggested the $1.5 trillion plan would more than pay for itself, assuming the economy grows much faster than any independent analysis of the bill has projected.

The Treasury acknowledged that its analysis was based on optimistic economic forecasts that assumed a host of policy changes yet to be enacted . The analysis prompted criticism from some tax experts.

“The report does not appear to be a projection of the economic effects of a tax bill,’’ said Scott Greenberg, an analyst at the conservative Tax Foundation. “It appears on the other hand to be a thought experiment on how federal revenues would vary under different economic effects of overall government policies. Which is, needless to say, an odd way to analyze a tax bill.’’

NEW YORK TIMES