Disappointment

An emotion that arises upon appraisal of the consequences of one’s decisions. Like regret, disappointment is a ‘post-decisional emotion’. Disappointment is an emotion that arises when there is a perceived gap between the factual outcome with an outcome that might have been had another state of the world occurred. As such, disappointment arises when one’s outcome is compared with ‘what could have been.’

Reference:
Zeelenberg, M., van Dijk, W. W., Van der Pligt, J., Manstead, A. S., Van Empelen, P., & Reinderman, D. (1998). Emotional reactions to the outcomes of decisions: The role of counterfactual thought in the experience of regret and disappointment. Organizational Behavior and Human Decision Processes, 75(2), 117-141. doi: 10.1006/obhd.1998.2784.