☆ 4.7 Article

Linear collider test of a neutrinoless double beta decay mechanism in left-right symmetric theories

EUROPEAN PHYSICAL JOURNAL C (2012)

期刊

EUROPEAN PHYSICAL JOURNAL C

卷 72, 期 5, 页码 -

出版社

SPRINGER

DOI: 10.1140/epjc/s10052-012-2023-0

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类别

Physics, Particles & Fields

资金

ERC
CSIC JAE
Spanish MEC [FPA2008-00319/FPA, FPA2011-22975, MULTI-DARK CSD2009-00064]
Generalitat Valenciana [Prometeo/2009/091]
EU ITN UNILHC [PITN-GA-2009-237920]

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摘要

There are various diagrams leading to neutrinoless double beta decay in left-right symmetric theories based on the gauge group SU(2)(L) x SU(2)(R). All can in principle be tested at a linear collider running in electron-electron mode. We argue that the so-called lambda-diagram is the most promising one. Taking the current limit on this diagram from double beta decay experiments, we evaluate the relevant cross section e(-)e(-) -> WL-WR-, where W-L(-) is the Standard Model W-boson and W-R(-) the one from SU(2)(R). It is observable if the life-time of double beta decay and the mass of the W-R are close to current limits. Beam polarization effects and the high-energy behaviour of the cross section are also analyzed.

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