Test of Electric Charge Conservation with Borexino.

  title={Test of Electric Charge Conservation with Borexino.},
  author={Matteo Agostini and Sabrina Appel and Gianpaolo Bellini and Jay B. Benziger and Daniel Bick and Giuseppe Bonfini and David Bravo and Barbara Caccianiga and Frank P. Calaprice and Alessio Caminata and Paolo Cavalcante and Alexander Chepurnov and D. D’Angelo and Stefano Davini and Alexander Derbin and Lea Di noto and I. S. Drachnev and A. Empl and A. V. {\'E}tenko and Kirill Fomenko and D. Franco and F Gabriele and Cristiano Galbiati and Chiara Ghiano and Marco Giammarchi and Marianne Goeger-Neff and Augusto Goretti and Maxim Gromov and Caren Hagner and Ed. V. Hungerford and Al. Ianni and Andrea Ianni and Karol Jedrzejczak and M. Kaiser and V. V. Kobychev and Denis Korablev and George Korga and D. Kryn and Matthias Laubenstein and Bjoern Lehnert and Evgeny Litvinovich and Francesco Lombardi and Paolo Lombardi and Livia Ludhova and Georgy Lukyanchenko and I. N. Machulin and Szymon Manecki and W. Maneschg and Simone Marcocci and Emanuela Meroni and Michael Meyer and Lino Miramonti and M. Misiaszek and Michele Montuschi and Pablo Mosteiro and Viktorina N. Muratova and Birgit Neumair and Lothar Oberauer and Michel Obolensky and Fausto Ortica and K. Otis and Marco Pallavicini and L{\'a}szl{\'o} Papp and Laura Perasso and Andrea Pocar and G. Ranucci and Alessandro Razeto and Alessandra Carlotta Re and Aldo Romani and Romain Roncin and Nicola Rossi and Stefan Sch{\"o}nert and Dmitrii Semenov and Hardy Simgen and Mikhail Skorokhvatov and O. Yu. Smirnov and Albert Sotnikov and S. V. Sukhotin and Yu. Suvorov and Roberto Tartaglia and Gemma Testera and John D. Thurn and M. A. Toropova and Evgenii Unzhakov and Alina Vishneva and Robert Bruce Vogelaar and Franz von Feilitzsch and H. G. Wang and Stefan Weinz and Juergen Winter and M. Wojcik and Michael Wurm and Zachary W. Yokley and Oleg Antonovich Zaimidoroga and S Zavatarelli and Kai Zuber and Grzegorz Zuzel},
  journal={Physical review letters},
  volume={115 23},
Borexino is a liquid scintillation detector located deep underground at the Laboratori Nazionali del Gran Sasso (LNGS, Italy). Thanks to the unmatched radio purity of the scintillator, and to the well understood detector response at low energy, a new limit on the stability of the electron for decay into a neutrino and a single monoenergetic photon was obtained. This new bound, τ≥6.6×10^{28}  yr at 90% C.L., is 2 orders of magnitude better than the previous limit. 

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