Europe's New Members Not Ready for the Euro
European Central Bank says fewer than half of new European Union members have met fiscal requirements to adopt euro; companion report by European Commission says none have met political requirements, like compatibility of its central statutes with those of European Central Bank; bank says many of countries are moving too slowly in cutting their budget deficits to levels below ceiling mandated by Maastricht Treaty, which created money union; central bank president Jean-Claude Trichet and chief economist Otmar Issing say new members must cut deficits; photo (M)