FIGURE 4-1 Comparison of out-year spending profiles in the four different budget scenarios considered by the committee. The profiles shown are in units of inflation-adjusted constant dollars assuming a future inflation rate of about 3 percent per annum. Although the committee’s recommended strategy encompasses the next 15 years, this chart projects only the next 10 years because budget projections become quite unrealistic when looking a full 15 years into the future.

new elementary particle physics initiatives that address the most exciting scientific challenges. In a budget scenario that returns to real growth, it will be possible to achieve a position of distinctive leadership within a worldwide program and to support a diverse set of experiments that address current scientific questions more fully than is possible in the constant-effort scenario. As funding becomes available, either through new resources or from the conclusion of an existing activity, it should be allocated in accordance with the priorities outlined in this report.

In the long run, true leadership in particle physics will require augmentation of the resources devoted to the discipline. Simply put, the committee believes that the level of resources currently being committed to particle physics will be inadequate, in the long term, to obtain the technological, economic, social, and scientific benefits of undertaking the most compelling opportunities in this transformative area of science. Strengthening the U.S. role in particle physics will strengthen national and international confidence in the future of U.S. science and technology and in the image of the United States as a great nation supported by great science.

Finally, it is the committee’s view that the competitiveness of the global and domestic economic environment the nation faces necessitates an aggressive investment in the mathematical and physical sciences, including particle physics, as well as in other areas of fundamental research.

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