Searches for double beta decay of ^(134)Xe with EXO-200

  title={Searches for double beta decay of ^(134)Xe with EXO-200},
  author={EXO-200 Collaboration J.B. Albert and Gisela Anton and I. Badhrees and P. S. Barbeau and Reimund Bayerlein and Dietrich Beck and V. A. Belov and Martin Breidenbach and T. Brunner and G. F. Cao and W. R. Cen and Christopher Chambers and Bruce Cleveland and Matthew Coon and Adam Craycraft and W. James Chesterfield Cree and Timothy V. Daniels and M. Danilov and S. J. Daugherty and Jacob Daughhetee and J. Davis and S. Delaquis and A. Der Mesrobian-Kabakian and Ralph G. DeVoe and Tamar Didberidze and Jens Dilling and A. Dolgolenko and M J Dolinski and William M. Fairbank and Jacques Farine and Soheyla Feyzbakhsh and Peter Fierlinger and D. Fudenberg and Razvan Gornea and K. Graham and Giorgio Gratta and Christopher Hall and Juergen Hoessl and Peter W. Hufschmidt and Michael Hughes and A. Jamil and M. J. Jewell and A. S. Johnson and Sereres Johnston and A. K. Karelin and Lisa J. Kaufman and Thomas Koffas and Scott Kravitz and Reiner Krucken and A. V. Kuchenkov and K. S. Kumar and Yang Lan and Douglas S. Leonard and S. Li and Caio Licciardi and Y. H. Lin and Ryan Maclellan and Michael G. Marino and Thilo Michel and Brian Mong and David C. Moore and K. Murray and R. Nelson and Oumarou Njoya and Allen C. Odian and I. Ostrovskiy and Andreas Piepke and Andrea Pocar and Fabrice Reti{\`e}re and Peter C. Rowson and John J. Russell and Alexis G. Schubert and David A. Sinclair and E. Smith and V. N. Stekhanov and M Tarka and T. Tolba and R. H. M. Tsang and Petr Vogel and J-L. Vuilleumier and Michael Wagenpfeil and A. P. Waite and Josiah Walton and Timothy Walton and M. Weber and Liangjian Wen and Ubi F. Wichoski and L. Yang and Yung-Ruey Yen and O. Ya. Zeldovich and J. Zettlemoyer and T. Ziegler},
  journal={Physical Review D},
Searches for double beta decay of ^(134)Xe were performed with EXO-200, a single-phase liquid xenon detector designed to search for neutrinoless double beta decay of ^(136)Xe. Using an exposure of 29.6  kg⋅yr, the lower limits of T^(2νββ_+(1/2) > 8.7×10^(20)  yr and T^(0νββ)_(1/2) > 1.1×10^(23)  yr at 90% confidence level were derived, with corresponding half-life sensitivities of 1.2×10^(21)  yr and 1.9×10^(23)  yr. These limits exceed those in the literature for ^(134)Xe, improving by factors… 
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