Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session X07: Precision Searches for New Long-range forces, from Quantum Sensors to Spacecraft
10:45 AM–12:33 PM,
Tuesday, April 16, 2019
Sheraton
Room: Governor's Square 16
Sponsoring
Units:
GPMFC DGRAV
Chair: Charles Hagedorn, University of Washington
Abstract: X07.00001 : MICROSCOPE: First Constraints on the Violation of the Weak Equivalence Principle by a Light Scalar Dilaton*
10:45 AM–11:21 AM
View Presentation Abstract
Presenter:
Joel Bergé
(ONERA / Paris Saclay University)
Author:
Joel Bergé
(ONERA / Paris Saclay University)
Collaboration:
MICROSCOPE
Launched on April 25, 2016, the MICROSCOPE satellite and its scientific instruments provided high-quality data during the entire mission, which came to its end on October 16, 2018. The first results, based on 7% of the total data, ruled out a violation of the WEP greater than 2x10^-14. In particular, we could provide new upper bounds on the characteristics of potential new long range interactions, such as a light scalar dilaton.
In this talk, I will first introduce the MICROSCOPE mission, in particular its scientific goals and measurement principles. Then, I will discuss its first results, with a focus on what constraints MICROSCOPE can bring on some modified gravity models linked to new interactions. Among them, I will present new bounds on a Yukawa deviation from Newtonian gravity, on the characteristics of the dilaton, and mention how we can constrain screening mechanisms such as a chameleon field.
While the remaining data is still being analysed, the final MICROSCOPE results should come closer to the 10^-15 precision; they should be published at the end of 2019.
*ONERA, CNES
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