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Theoretical Particle Physics

Publications

Neutrinoless double beta decay at the LHC

Publicaciones

Neutrinoless double beta decay at the LHC

Research areas:

Física Teórica de Partículas

Year:

2013

Type of Publication:

In Proceeding

Authors:

  • Juan Carlos Helo
  • M. Hirsch
  • Sergey Kovalenko

Journal:

Phys.Rev.

Volume:

D88

Pages:

5

Abstract:

We compare the discovery potential of the LHC for lepton number violating (LNV) signals with the sensitivity of current and future double beta decay experiments, assuming 0\nu\beta\beta decay is dominated by heavy particle exchange. We consider charged scalar, leptoquark and diquark mechanisms of 0\nu\beta\beta-decay, covering the 0\nu\beta\beta-decay operators with both, the smallest and largest, possible rates. We demonstrate, if 0\nu\beta\beta-decay were found with a half-life below 1026−1027 ys a positive signal should show up at the LHC, except for some particular cases of the leptoquark mechanism, and vice versa, if the LHC does not find any hints for LNV, a "short-range" explanation for a finite 0\nu\beta\beta-decay half-life will be ruled out in most cases. We argue, if a positive LNV signal were found at the LHC, it is possible to identify the dominant contribution to 0\nu\beta\beta. Two different kinds of observables which could provide such "model discriminating" power are discussed: Different invariant mass peaks and the charge asymmetry.

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