Summary :
Our collaborative research aims at preparing the operation of the next generation ultra-high-energy cosmic ray (UHECR) telescope, which will observe from space the fluorescence light of the UHECR-induced atmospheric showers. The collaboration involves hardware development and calibration, in the context of two pathfinder experiments (the EUSO-Balloon mission, led by France, and the EUSO-TA initiative, led by Japan), as well as theoretical work to understand UHECR origin and propagation across the universe.

French member :
E. Parizot, J-N. Albert, D. Allard, P. Barillon, S. Blin, J-N. Capdevielle, S. Dagoret, C. de la Taille, P. Gorodetzky, C. Lachaud, G. Prévot,

Japanese member :
J. Fujimoto, Y. Arai, Y. Kurihara, F. Kajino, H. Ikeda, T. Ebisuzaki, Y. Kawasaki, N. Inoue, H. Sagawa, M. Fukushima, S. Inoue, S. Nagataki

References:
[1] Anisotropy expectations for ultra-high-energy cosmic rays with future high statistics experiments', Rouillé d'Orfeuil, B., Allard, D., Lachaud, C., Parizot, E., Blaksley, C., and Nagataki S., A&A (2014) (in press) [astro-ph arXiv:1401.1119]
[2] The JEM-EUSO Mission: Contributions to the ICRC 2013 [Collection of many publications]
The JEM-EUSO Collaboration
Conference Proceedings: 33rd International Cosmic Ray Conference, ICRC 2013 
[arXiv:1307.7071]
[3] A balloon-borne prototype for demonstrating the concept of JEM-EUSO
P. von Ballmoos, et al., for the JEM-EUSO Collaboration,
 Advances in Space Research, 53, 1544 (2014)
[4] The JEM-EUSO mission, T. Ebisuzaki, Gustavo Medina-Tanco, Andrea Santangelo, for the JEM-EUSO Collaboration,
 Advances in Space Research, 53, 1499 (2014)
[5] Calibration and testing of a prototype of the JEM-EUSO telescope on Telescope Array site
M. Casolino for the JEM-EUSO Collaboration, T. Fujii, D. Ikeda, Y. Tameda, T. Shibata, H. Sagawa, M. Fukushima et al. for the JEM-EUSO Collaboration
 EPJ Web of Conferences 53, 09005 (2013)
[6] EUSO-Balloon: a pathfinder for detecting UHECR’s from the edge of space
P. von Ballmoos, et al., 
EPJ Web of Conferences 53, 09003 (2013)
[7] Calibration of the JEM-EUSO detector
N. Sakaki, J. Adams, M. Christl, P. Gorodetzky and L. Wiencke for the JEM-EUSO Collaboration, 
EPJ Web of Conferences 53, 09004 (2013)
[8] An Evaluation of the Exposure in Nadir Observation of the JEM-EUSO Mission
The JEM-EUSO Collaboration 
Astroparticle Physics 44, 76-90 (2013) - arXiv:1305.2478

website :
Main JEM-EUSO web site: http://jemeuso.riken.jp
Main EUSO-Balloon web site: http://euso-balloon.lal.in2p3.fr

Summary:
Project goals are :
- to devise optimized strategies for detection and characterization of the CMB B-mode polarization signals from the ground and satellite platforms
- to contribute to the development of the satellite mission concepts: CORE/PRISM and LiteBIRD
- to contribute to the development of the ground based observational programs: POLARBEAR, POLARBEAR-2 and SIMONS ARRAY and later the so-called STAGE-IV experiments
- to analyse actual data sets as collected by the POLARBEAR experiments.

French members :
R. Stompor, M. Bucher, J. Delabrouille, J. Errard, K.M. Ganga, A. Karakci

Japanese members :
M. Hazumi, Y. Chinone, M. Hasagawa, N. Katayama, H. Nishino

References :
[1] POLARBEAR Collaboration, "Evidence for Gravitational Lensing of the Cosmic Microwave Background Polarization from Cross-Correlation with the Cosmic Infrared Background", Physical Review Letters, Volume 112, Issue 13, id.131302, 2014
[2] POLARBEAR Collaboration, "Measurement of the Cosmic Microwave Background Polarization Lensing Power Spectrum with the POLARBEAR Experiment", Physical Review Letters, Volume 113, Issue 2, id.021301, 2014
[3] COrE/PRISM Collaboration, "PRISM (Polarized Radiation Imaging and Spectroscopy Mission): an extended white paper", Journal of Cosmology and Astroparticle Physics, Issue 02, article id. 006, 2014
[4] LiTEBIRD Collaboration, "Mission Design of LiteBIRD", Journal of Low Temperature Physics, Volume 176, Issue 5-6, pp. 733-740, 2014

website :
POLARBEAR experiment: http://bolo.berkeley.edu/polarbear/
LiTEBIRD mission: http://litebird.jp/
CORE/PRISM mission: http://www.prism-mission.org