TY - JOUR

T1 - Neutrinoless double- β decay of Se 82 in the shell model

T2 - Beyond the closure approximation

AU - Sen'Kov, R. A.

AU - Horoi, M.

AU - Brown, B. A.

PY - 2014/5/5

Y1 - 2014/5/5

N2 - We recently proposed a method [R. A. Senkov and M. Horoi, Phys. Rev. C 88, 064312 (2013)PRVCAN0556-281310.1103/PhysRevC.88.064312] to calculate the standard nuclear matrix elements for neutrinoless double-β decay (0νββ) of Ca48 going beyond the closure approximation. Here we extend this analysis to the important case of Se82, which was chosen as the base isotope for the upcoming SuperNEMO experiment. We demonstrate that by using a mixed method that considers information from closure and nonclosure approaches, one can get excellent convergence properties for the nuclear matrix elements, which allows one to avoid unmanageable computational costs. We show that in contrast with the closure approximation the mixed approach has a very weak dependence on the average closure energy. The matrix elements for the heavy neutrino-exchange mechanism that could contribute to the 0νββ decay of Se82 are also presented.

AB - We recently proposed a method [R. A. Senkov and M. Horoi, Phys. Rev. C 88, 064312 (2013)PRVCAN0556-281310.1103/PhysRevC.88.064312] to calculate the standard nuclear matrix elements for neutrinoless double-β decay (0νββ) of Ca48 going beyond the closure approximation. Here we extend this analysis to the important case of Se82, which was chosen as the base isotope for the upcoming SuperNEMO experiment. We demonstrate that by using a mixed method that considers information from closure and nonclosure approaches, one can get excellent convergence properties for the nuclear matrix elements, which allows one to avoid unmanageable computational costs. We show that in contrast with the closure approximation the mixed approach has a very weak dependence on the average closure energy. The matrix elements for the heavy neutrino-exchange mechanism that could contribute to the 0νββ decay of Se82 are also presented.

UR - http://www.scopus.com/inward/record.url?scp=84899965789&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.89.054304

DO - 10.1103/PhysRevC.89.054304

M3 - Article

AN - SCOPUS:84899965789

SN - 0556-2813

VL - 89

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 5

M1 - 054304

ER -