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4 results on '"Valle J"'

1. Neutrino mass in supersymmetry.

Author

Valle, J. W. F.

Subjects
*NEUTRINO mass, *SUPERSYMMETRY, *OSCILLATIONS, *FLAVOR in particle physics, *LARGE Hadron Collider
Abstract

After summarizing neutrino oscillation results I discuss high and low-scale seesaw mechanisms, with or without supersymmetry, as well as recent attempts to understand the pattern of neutrino mixing from flavor symmetries. I also mention the possibility of intrinsic supersymmetric neutrino masses in the context of broken R parity models, showing how this leads to clear tests at the LHC. [ABSTRACT FROM AUTHOR]

Published
2010
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2. Gravitino dark matter and neutrino masses with bilinear R-parity violation.

Author

Restrepo, Diego, Taoso, Marco, Valle, J. W. F., and Zapata, Oscar

Subjects
*DARK matter, *NEUTRINO mass, *ASTROPHYSICS, *ASTRONOMICAL observations, *OSCILLATIONS, *TEMPERATURE effect, *LARGE Hadron Collider
Abstract

Bilinear R-parity violation provides an attractive origin for neutrino masses and mixings. In such schemes the gravitino is a viable decaying dark matter particle whose R-parity violating decays lead to monochromatic photons with rates accessible to astrophysical observations. We determine the parameter region allowed by gamma-ray line searches, dark matter relic abundance, and neutrino oscillation data, obtaining a limit on the gravitino mass mG ≲ 1-10 GeV corresponding to a relatively low reheat temperature TR ≲ few X 107-108 GeV. Neutrino mass and mixing parameters may be reconstructed at accelerator experiments like the Large Hadron Collider. [ABSTRACT FROM AUTHOR]

Published
2012
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3. Heavy neutrinos and lepton flavor violation in left-right symmetric models at the LHC.

Author

Das, S. P., Deppisch, F. F., Kittel, O., and Valle, J. W. F.

Subjects
*NEUTRINOS, *LEPTONS (Nuclear physics), *SYMMETRY (Physics), *STANDARD model (Nuclear physics), *FLAVOR in particle physics, *LARGE Hadron Collider
Abstract

We discuss lepton flavor violating processes induced in the production and decay of heavy right-handed neutrinos at the LHC. Such particles appear in left-right symmetrical extensions of the standard model as the messengers of neutrino mass generation, and can have masses at the TeV scale. We determine the expected sensitivity on the right-handed neutrino mixing matrix, as well as on the right-handed gauge boson and heavy neutrino masses. By comparing the sensitivity of the LHC with that of searches for low energy lepton flavor violating processes, we identify favorable areas of the parameter space to explore the complementarity between lepton flavor violating at low and high energies. [ABSTRACT FROM AUTHOR]

Published
2012
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4. Flavor in heavy neutrino searches at the LHC.

Author

Aguilar-Saavedra, J. A., Deppisch, F., Kittel, O., and Valle, J. W. F.

Subjects
*FLAVOR in particle physics, *NEUTRINOS, *LARGE Hadron Collider, *MATHEMATICAL models, *ELECTRONS, *MUONS, *LEPTONS (Nuclear physics)
Abstract

Heavy neutrinos at the TeV scale have been searched for at the LHC in the context of left-right models, under the assumption that they couple to the electron, the muon, or both. We show that current searches are also sensitive to heavy neutrinos coupling predominantly to the tau lepton, and present limits can significantly constrain the parameter space of general ñavor mixing. [ABSTRACT FROM AUTHOR]

Published
2012
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