The Science Case for STEP

  title={The Science Case for STEP},
  author={James Overduin and Francis Everitt and John C. Mester and Paul W. Worden},
  journal={Advances in Space Research},

Figures from this paper

STEP and fundamental physics

The Satellite Test of the Equivalence Principle (STEP) will advance experimental limits on violations of Einstein's equivalence principle from their present sensitivity of two parts in 1013 to one

The Experimental Verdict on Spacetime from Gravity Probe B

Concepts of space and time have been closely connected with matter since the time of the ancient Greeks. The history of these ideas is briefly reviewed, focusing on the debate between "absolute" and

Development of Components for Implementation of Free Fall Experiments to Test the Weak Equivalence Principle

In this work I describe the development of an electrostatic positioning system (EPS) for improving the starting conditions of the test masses in a free fall experiment to test the weak equivalence

Quantum Test of the Universality of Free Fall

The universality of free fall (UFF) emerges [1] from theequality of the inertial and the gravitational mass, whichHeinrich Hertz [2] already in 1884 called a ”wonderfulmystery”. In 1915 Albert

Quantum test of the equivalence principle and space-time aboard the International Space Station

We describe the Quantum Test of the Equivalence principle and Space Time (QTEST), a concept for an atom interferometry mission on the International Space Station (ISS). The primary science objective

An alternative model of particle physics in a 10-dimension (pseudo) Euclidian space-time

A consistent description of the fundamental interactions of particle physics based upon the assumption of 6 real extra dimensions is presented. The usual 4-dimension space-time, a curved hypersurface

Searches for the role of spin and polarization in gravity

Spin is fundamental in physics. Gravitation is universal. Searches for the role of spin in gravitation dated before the firm establishment of the electron spin in 1925. Since mass and spin or

A weak equivalence principle test on a suborbital rocket

We describe a Galilean test of the weak equivalence principle, to be conducted during the free fall portion of a sounding rocket flight. The test of a single pair of substances is aimed at a

From Classical Theory to Quantum Gravity

While it has been generally accepted for decades that general relativity and quantum theory are inconsistent, and that therefore general relativity must yield to a new theory of gravity compatible



Insights into dark energy: interplay between theory and observation

Recent observations suggest that the universe is spa- tially flat and undergoing a period of accelerated expan- sion. In the context of the standard cosmological picture based on Einstein's general

Changing alpha with time: implications for fifth-force-type experiments and quintessence.

If the recent observations suggesting a time variation of the fine structure constant are correct, they imply the existence of an ultralight scalar particle. This particle inevitably couples to

Progress in lunar laser ranging tests of relativistic gravity.

Analyses of laser ranges to the Moon provide increasingly stringent limits on any violation of the equivalence principle (EP); they also enable several very accurate tests of relativistic gravity, including the search for a time variation in the gravitational constant.

From Equivalence Principles to Cosmology : Cosmic Polarization Rotation, CMB Observation, Neutrino Number Asymmetry, Lorentz Invariance and CPT(VIII Asia-Pacific International Conference on Gravitation and Astrophysics (ICGA8))

In this paper, we review the approach leading to cosmic polarization rotation observation and present the current status with an outlook. In the study of the relations among equivalence principles,

Runaway dilaton and equivalence principle violations.

In a recently proposed scenario, where the dilaton decouples while cosmologically attracted towards infinite bare string coupling, its residual interactions can be related to the amplitude of density

The Cosmological Constant from the Viewpoint of String Theory

The mystery of the cosmological constant is probably the most pressing obstacle to significantly improving the models of elementary particle physics derived from string theory. The problem arises

Test of the equivalence principle using a rotating torsion balance.

By analyzing the data for accelerations towards the center of the Milky Way the authors find equal attractions of Be and Ti towards galactic dark matter, yielding eta(DM,Be-Ti)=(-4+/-7)x10(-5).

The new physics for the twenty-first century

Introduction Gordon Fraser Part I. Matter and the Universe: 1. Cosmology Wendy Freedman and Rocky Kolb 2. Gravity Ronald Adler 3. Astrophysics Arnon Dar 4. Particles and the standard model Chris

Sources and detection of dark matter and dark energy in the universe : proceedings of the 10th UCLA Symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe, February 22-24, 2012, Marina del Rey, California

List of Talks from DM 2012.- List of Attendees at DM 2012.- Brief Overview.- Theoretical Precision: Cosmology and Dark Matter.- Radiative natural supersymmetry with mixed axion/higgsino cold dark

Sources and detection of dark matter and dark energy in the universe : proceedings of the 8th UCLA symposium, Marina del Rey, California, 20-22 February 2008

The eighth UCLA symposium on Sources and Detection of Dark Matter and Dark Energy in the Universe brought together astroparticle physicists and astronomers from around the world to share recent