FACTBOX - "Yes" and "No" camps in Irish treaty vote

(Reuters) - Irish voters went to the polls on Thursday to determine the fate of the European Union's reform treaty in a referendum that is too close to call.

Most of Ireland's parliamentary parties, businesses, congress of trade unions and powerful farming lobby have campaigned for a "Yes" vote.

A loose coalition of "No" groups, including the nationalist Sinn Fein party and some break-away trade unions and businessmen, opposes the treaty.

Here are some of the main arguments used by the two sides:

IRELAND'S INFLUENCE WITHIN THE EU

Yes: A rejection could leave Ireland in a diplomatic wilderness, alienating allies whose subsidies helped underpin Ireland's "Celtic Tiger" economic boom and undermining Ireland's hard-won ability to hit above its weight in Europe. Friendly nations will be needed in a review of EU farm subsidies.

No: Ireland will lose influence because it will no longer have a permanent position on the European Commission and smaller states will see their clout shrink on the decision-making European Council.

SOVEREIGNTY AND NEUTRALITY

Yes: The treaty and the Irish constitution have enough safeguards to protect Ireland's so-called triple-lock which means any deployment of troops must be approved by government, parliament and the United Nations. Ireland will continue to take part in U.N. peacekeeping missions but cannot be forced by other EU states to take part in military action.