  Understanding the relationship between the composition of a research team and
the potential impact of their research papers is crucial as it can steer the
development of new science policies for improving the research enterprise.
Numerous studies assess how the characteristics and diversity of research teams
can influence their performance across several dimensions: ethnicity,
internationality, size, and others. In this paper, we explore the impact of
diversity in terms of the authors' expertise. To this purpose, we retrieved
114K papers in the field of Computer Science and analysed how the diversity of
research fields within a research team relates to the number of citations their
papers received in the upcoming 5 years. The results show that two different
metrics we defined, reflecting the diversity of expertise, are significantly
associated with the number of citations. This suggests that, at least in
Computer Science, diversity of expertise is key to scientific impact.
