Maybe. But . . .
First, I'm not a lawyer, so this isn't legal advice. For that, you need a lawyer. You also need to consult with your Realtor.
If the buyer doesn't perform according to the contract, then likely yes. The buyer, for instance, probably is required to apply for a mortgage and for insurance coverage within x days of contract ratification. If that doesn't occur on time, then there could be grounds. In other words, there may be provisions in the contract that give you a clear "out."
Otherwise, it gets messy. As a practical matter, if you simply change your mind and decide you don't want to sell, it's very difficult to force you to do so. The buyers could sue for "specific performance" but that isn't a sure thing, and would take a while (and some up-front money). Your agent might also seek compensation from you--the amount of commission he/she would have received had you not backed out. Read your listing agreement for details.
Why do you want to get out of the deal? Are there adjustments that could be made to the contract to make it acceptable to you? Or what other issues are you confronting? There may be a solution short of "getting out of the deal" that would work for you and your buyers. Again, consult with your Realtor.
Hope that helps.