29 May 2018 to 3 June 2018
Hyatt Regency Indian Wells Conference Center
US/Pacific timezone

Current Status of Neutrinoless Double-Beta Decay Matrix Elements

31 May 2018, 17:30
20m
North Foyer | Kachina Room (Hyatt Regency Indian Wells Conference Center)

North Foyer | Kachina Room

Hyatt Regency Indian Wells Conference Center

44600 Indian Wells Lane, Indian Wells, CA 92210, USA

Speaker

Javier Menendez (Center for Nuclear Study, University of Tokyo)

Description

Observing neutrinoless double-beta ($0\nu\beta\beta$) decay is the most promising way to detect lepton number violation in the laboratory, and it would imply that neutrinos are their own antiparticles. The decay half-life naturally depends on a nuclear matrix element that needs to be calculated theoretically. A good knowledge of this matrix element is key for the planning of $0\nu\beta\beta$ decay experiments, and also to extract information on the neutrino mass once $0\nu\beta\beta$ decay is observed. Currently predicted matrix-element values depend on the many-body method used to calculate them and, in addition, they may need to be "quenched", as the matrix elements of other beta decays that, however, have a very different momemtum-transfer regime. I will discuss recent efforts towards obtaining reliable nuclear matrix elements, ranging from improved calculations with phenomenological many-body approaches, to the first applications of "ab initio" many-body methods to $0\nu\beta\beta$ decay, finalizing with possible measurements that could be very useful to test calculations and to provide information on the value of the $0\nu\beta\beta$ matrix elements.
E-mail [email protected]
Funding source Japanese Society for the Promotion of Science through KAKENHI grant No. 18K0639

Primary author

Javier Menendez (Center for Nuclear Study, University of Tokyo)

Presentation materials