[Please see discussion entries as well]

"Now some economists are suggesting that the growth years before the crisis were a blip rather than a trend, and that the rich economies will have to learn how to live in a world of low growth. They may be wrong; pessimism is also a feature of recessions. But what if they are not? It would mean a fundamental shift in the way that companies do business in the richer world. In this Future Perspective, we examine the arguments and outline the ways in which businesses need to change their thinking if they are to succeed in a low-growth world."
http://www.wpp.com/wpp/marketing/consumerinsights/succeeding...

"Low-growth world" needs to be treated with caution: It may or may not refer to the entire global activity - it may just be used to introduce a story about one country's low GDP.

It also may just mean the Western World (investment strategies) and exclude the developing countries. In this case, "weltweit" has to be omitted and replaced by something such as "geringen Wachstumsraten in den Industriestaaten". That depends on the context (think world = environment).

It's also not "Verlangsamung" because -ung would refer to growth as representing the process. Here, it means that we are on our way to getting stuck in a world of low growth rates (one source indicates that the threshold is at 3% global GDP). The (global) economy has already been slowing down: Now, the reversal of globalization may exacerbate the situation.

Considering the above, I suggest plural (Wachstumsraten) and momentum = trend (momentum as having initiated a process in favor of something).

The entire sentence could read:
Möglicherweise wird die jüngste Abkehr vom Globalisierungsgedanken den Trend hin zu weltweit geringen Wachstumsraten (nur) noch verstärken.

I wrote -gedanken because the idea is what counts, and that's what people fear is going to happen between certain states on the global stage: Cut off ties to old trade partners, say no to globalization, and focus on commercial activities among groups of states, may they have something called Union or Free Trade in their name(s).

But, of course, you can use some other word as well.