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@article{Touboul:2022:10.1103/PhysRevLett.129.121102,
author = {Touboul, P and Métris, G and Rodrigues, M and Bergé, J and Robert, A and Baghi, Q and André, Y and Bedouet, J and Boulanger, D and Bremer, S and Carle, P and Chhun, R and Christophe, B and Cipolla, V and Damour, T and Danto, P and Demange, L and Dittus, H and Dhuicque, O and Fayet, P and Foulon, B and Guidotti, P-Y and Hagedorn, D and Hardy, E and Huynh, P-A and Kayser, P and Lala, S and Lämmerzahl, C and Lebat, V and Liorzou, F and List, M and Löffler, F and Panet, I and Pernot-Borràs, M and Perraud, L and Pires, S and Pouilloux, B and Prieur, P and Rebray, A and Reynaud, S and Rievers, B and Selig, H and Serron, L and Sumner, T and Tanguy, N and Torresi, P and Visser, P and MICROSCOPE, Collaboration},
doi = {10.1103/PhysRevLett.129.121102},
journal = {Physical Review Letters},
title = {MICROSCOPE mission: final results of the test of the equivalence principle},
url = {http://dx.doi.org/10.1103/PhysRevLett.129.121102},
volume = {129},
year = {2022}
}

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TY  - JOUR
AB  - The MICROSCOPE mission was designed to test the weak equivalence principle (WEP), stating the equality between the inertial and the gravitational masses, with a precision of 10^{-15} in terms of the Eötvös ratio η. Its experimental test consisted of comparing the accelerations undergone by two collocated test masses of different compositions as they orbited the Earth, by measuring the electrostatic forces required to keep them in equilibrium. This was done with ultrasensitive differential electrostatic accelerometers onboard a drag-free satellite. The mission lasted two and a half years, cumulating five months worth of science free-fall data, two-thirds with a pair of test masses of different compositions-titanium and platinum alloys-and the last third with a reference pair of test masses of the same composition-platinum. We summarize the data analysis, with an emphasis on the characterization of the systematic uncertainties due to thermal instabilities and on the correction of short-lived events which could mimic a WEP violation signal. We found no violation of the WEP, with the Eötvös parameter of the titanium and platinum pair constrained to η(Ti,Pt)=[-1.5±2.3(stat)±1.5(syst)]×10^{-15} at 1σ in statistical errors.
AU  - Touboul,P
AU  - Métris,G
AU  - Rodrigues,M
AU  - Bergé,J
AU  - Robert,A
AU  - Baghi,Q
AU  - André,Y
AU  - Bedouet,J
AU  - Boulanger,D
AU  - Bremer,S
AU  - Carle,P
AU  - Chhun,R
AU  - Christophe,B
AU  - Cipolla,V
AU  - Damour,T
AU  - Danto,P
AU  - Demange,L
AU  - Dittus,H
AU  - Dhuicque,O
AU  - Fayet,P
AU  - Foulon,B
AU  - Guidotti,P-Y
AU  - Hagedorn,D
AU  - Hardy,E
AU  - Huynh,P-A
AU  - Kayser,P
AU  - Lala,S
AU  - Lämmerzahl,C
AU  - Lebat,V
AU  - Liorzou,F
AU  - List,M
AU  - Löffler,F
AU  - Panet,I
AU  - Pernot-Borràs,M
AU  - Perraud,L
AU  - Pires,S
AU  - Pouilloux,B
AU  - Prieur,P
AU  - Rebray,A
AU  - Reynaud,S
AU  - Rievers,B
AU  - Selig,H
AU  - Serron,L
AU  - Sumner,T
AU  - Tanguy,N
AU  - Torresi,P
AU  - Visser,P
AU  - MICROSCOPE,Collaboration
DO  - 10.1103/PhysRevLett.129.121102
PY  - 2022///
SN  - 0031-9007
TI  - MICROSCOPE mission: final results of the test of the equivalence principle
T2  - Physical Review Letters
UR  - http://dx.doi.org/10.1103/PhysRevLett.129.121102
UR  - https://www.ncbi.nlm.nih.gov/pubmed/36179190
UR  - http://hdl.handle.net/10044/1/100043
VL  - 129
ER  -

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