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Frequently Asked Questions (FAQs): NSF Experimental Elementary Particle Physics (EPP)

1) What is the NSF Experimental Elementary Particle Physics (EPP) grant opportunity?

Experimental Elementary Particle Physics (EPP) is a National Science Foundation (NSF) grant opportunity that supports experimental research using particle accelerators to investigate fundamental questions about the universe. The program focuses on understanding the basic nature of matter, energy, space, and time, and it funds work that connects particle physics (the very small) with cosmology and the evolution of the universe (the very large).

2) What types of scientific questions does EPP aim to address?

Based on the opportunity description, EPP-funded research is intended to test foundational ideas such as:

• How particles acquire mass (with the Higgs cited as an example in the description)
• Whether nature's forces can be unified
• What dark matter and dark energy might be
• How the universe began
• Whether additional dimensions beyond the familiar spacetime framework could exist

3) What kinds of projects or activities are supported by this program?

The opportunity is meant to help researchers design, build, operate, and analyze accelerator-based experiments. It also supports enabling technologies and infrastructure that make modern particle physics possible, including detector development, accelerator-related advances, and large-scale computing approaches for processing and analyzing massive datasets.

4) Does the EPP program focus only on collider physics?

No. In addition to collider physics, the opportunity includes strong support for accelerator-based neutrino research. The description emphasizes a new generation of neutrino experiments that use intense accelerator-produced neutrino beams sent over very long distances to large underground detectors to study neutrino oscillations under controlled laboratory conditions.

5) What major facilities or experiments are referenced in the opportunity description?

The description highlights participation in large, international accelerator projects and mentions facilities such as Fermilab's Tevatron and, especially, the Large Hadron Collider (LHC) at CERN.

6) Why is detector and instrumentation development emphasized?

Modern collider experiments must handle extremely high collision rates (described as hundreds of millions of collisions per second) while remaining sensitive to rare signals that may appear only a few times per day. Because of this, the program framing underscores the need for advanced detector development, precision measurement techniques, and sophisticated data analysis methods capable of isolating potential new phenomena from large background signals.

7) What is the role of data analysis and computing in EPP-supported research?

The opportunity notes that particle physics experiments produce enormous datasets that must be processed, shared, and analyzed by large and widely distributed collaborations. It specifically mentions development of grid computing at national and international scales, reflecting the need for distributed computing approaches that enable collaborative analysis across institutions and countries.

8) How does the program describe neutrino experiments and their goals?

The description emphasizes long-baseline neutrino experiments where a neutrino beam produced at an accelerator travels hundreds of miles through the Earth to large underground detectors. These experiments measure how the neutrino "flavor" composition changes over distance (neutrino oscillations), and they are positioned as a key frontier because neutrinos are elusive particles whose properties may reveal physics beyond current models and inform understanding of the early universe.

9) Does the opportunity support accelerator physics itself, not just experiments using accelerators?

Yes. Beyond headline experiments, the opportunity supports enabling technologies and infrastructure, including advances in accelerator physics itself, improvements to detector systems used at accelerator facilities, and computing approaches needed for large collaborations.

10) Is education and outreach mentioned as part of the program?

Yes. The description notes engagement of K-12 educators who participate directly in experiments alongside university scientists and students. This is framed as part of workforce development and broadening participation in science.

11) What type of grant is this and how is it categorized?

Administratively, it is described as an NSF discretionary grant opportunity in the "Science and Technology and other Research and Development" category.

12) Approximately how many awards are expected and what is the estimated total funding level?

The opportunity lists an expected number of awards of about 20 and an estimated total funding level of $50,000,000.

13) What is the minimum (floor) award size listed?

The listed award floor is $300,000.

14) Is cost-sharing or matching required?

No. The opportunity states there is no cost-sharing or matching requirement.

15) Who is eligible to apply?

Eligibility is described as unrestricted (open to any type of entity), subject to clarifications in the official program text.

16) What were the proposal timing details in the archived posting?

The archived posting shows an original full proposal target date of October 26, 2011, with an annual target of the last Wednesday in October thereafter.

17) Is this opportunity still active?

The information provided indicates the opportunity was later replaced by PD 12-1221 and archived in May 2012.

18) What is the overall purpose or intended impact of the EPP program?

The program is designed to sustain U.S. leadership and participation in accelerator-based particle physics by funding experiments, instrumentation, computing, and collaborative research structures needed to pursue rare, high-value discoveries about the fundamental workings of the universe.

19) What discovery targets are highlighted as motivating examples?

The description points to high-impact discovery targets including particles associated with the origin of mass (the Higgs is cited as an example), possible new particles or interactions relevant to dark matter, and signatures that could indicate new spacetime structure (such as additional dimensions).

20) What does the opportunity suggest about collaboration scale and international participation?

A major emphasis is participation in large, international accelerator projects and the complex instrumentation they require. The mention of CERN's LHC and large-scale grid computing indicates the program expects and supports work carried out in large, distributed collaborations.