Publications

Title	Novel methods to measure the gravitational constant in space
Authors	Armano, M. , Audley, H. , Baird, J. , Binetruy, P. , Born, M. , Bortoluzzi, D. , Castelli, E. , Cavalleri, A. , Cesarini, A. , Cruise, A. M. , Danzmann, K. , de Deus Silva, M. , Diepholz, I , Dixon, G. , Dolesi, R. , Ferraioli, L. , Ferroni, V , Fitzsimons, E. D. , Freschi, M. , Gesa, L. , Gibert, F. , Giardini, D. , Giusteri, R. , Grimani, C. , Grzymisch, J. , Harrison, I , Hartig, M-S , Heinzel, G. , Hewitson, M. , Hollington, D. , Hoyland, D. , Hueller, M. , Inchauspe, H. , Jennrich, O. , Jetzer, P. , Karnesis, N. , Kaune, B. , Korsakova, N. , Killow, C. J. , Lobo, J. A. , Liu, L. , Lopez-Zaragoza, J. P. , Maarschalkerweerd, R. , Mance, D. , Meshksar, N. , Martin, V , Martin-Polo, L. , Martino, J. , Martin-Porqueras, F. , McNamara, P. W. , Mendes, J. , Mendes, L. , Nofrarias, M. , Paczkowski, S. , Perreur-Lloyd, M. , Petiteau, A. , Pivato, P. , Plagnol, E. , Ramos-Castro, J. , Reiche, J. , Robertson, D. , RIVAS GARCÍA, FRANCISCO, Russano, G. , Slutsky, J. , Sopuerta, C. F. , Sumner, T. , Texier, D. , Thorpe, J. , Trenkel, C. , Vetrugno, D. , Vitale, S. , Wanner, G. , Ward, H. , Wass, P. J. , Weber, W. J. , Wissel, L. , Wittchen, A. , Zweifel, P. , Lisa Pathfinder Collaboration
External publication	Si
Means	Phy. Rev. D
Scope	Article
Nature	Científica
JCR Quartile	1
SJR Quartile	1
JCR Impact	4.83300
SJR Impact	1.66400
Publication date	20/09/2019
ISI	000487732500001
DOI	10.1103/PhysRevD.100.062003
Abstract	We present two novel methods, tested by LISA Pathfinder, to measure the gravitational constant G for the first time in space. Experiment 1 uses electrostatic suspension forces to measure a change in acceleration of a test mass due to a displaced source mass. Experiment 2 measures a change in relative acceleration between two test masses due to a slowly varying fuel tank mass. Experiment 1 gave a value of G. 6.71 +/- 0.42(x10(-11)) m(3) s(-2) kg(-1) and experiment 2 gave 6.15 +/- 0.35(x10(-11)) m(3) s(-2) kg(-1), both consistent with each other to l sigma and with the CODATA 2014 recommended value of 6.67408 +/- 0.00031(x10(-11)) m(3) s(-2) kg(-1) to 2 sigma. We outline several ideas to improve the results for a future experiment, and we suggest that a measurement in space would isolate many terrestrial issues that could be responsible for the inconsistencies between recent measurements.
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