319 citations · 1.5k across the 26 of their papers we have counts for
25 papers · 1 filter
Double beta decay and neutrino mass models
J. C. Helo, M. Hirsch, T. Ota +1
Neutrinoless double beta decay allows to constrain lepton number violating extensions of the standard model. If neutrinos are Majorana particles, the mass mechanism will always con…
Enhancing with the -penguin
M. Hirsch, F. Staub, A. Vicente
Lepton flavor violation (LFV) has been observed in neutrino oscillations. For charged lepton FV decays only upper limits are known, but sizable branching ratios are expected in man…
Hefty MSSM-like light Higgs in extended gauge models
Martin Hirsch, Michal Malinsky, Werner Porod +2
It is well known that in the MSSM the lightest neutral Higgs h^0 must be, at the tree level, lighter than the Z boson and that the loop corrections shift this stringent upper bound…
Soft masses in SUSY SO(10) GUTs with low intermediate scales
Valentina De Romeri, Martin Hirsch, Michal Malinský
The specific shape of the squark, slepton and gaugino mass spectra, if measured with suficient accuracy, can provide invaluable information not only about the dynamics underpinning…
Supersymmetric type-III seesaw: lepton flavour violating decays and dark matter
J. N. Esteves, M. Hirsch, W. Porod +2
We study a supersymmetric version of the seesaw mechanism type-III. The model consists of the MSSM particle content plus three copies of 24 superfields. The fermionic part of the S…
LHC and lepton flavour violation phenomenology of a left-right extension of the MSSM
J. N. Esteves, M. Hirsch, W. Porod +3
We study the phenomenology of a supersymmetric left-right model, assuming minimal supergravity boundary conditions. Both left-right and (B-L) symmetries are broken at an energy sca…
Discrete dark matter
M. Hirsch, S. Morisi, E. Peinado +1
We propose a new motivation for the stability of dark matter (DM). We suggest that the same non-abelian discrete flavor symmetry which accounts for the observed pattern of neutrino…
LHC phenomenology of the SSM
A. Bartl, M. Hirsch, S. Liebler +2
The SSM has been proposed to solve simultaneously the -problem of the MSSM and explain current neutrino data. The model breaks lepton number as well as R-parity. In this pap…
Supersymmetric seesaw type II: CERN LHC and lepton flavour violating phenomenology
M. Hirsch, S. Kaneko, W. Porod
We study the supersymmetric version of the type-II seesaw mechanism assuming minimal supergravity boundary conditions. We calculate branching ratios for lepton flavour violating (L…
Tri-bimaximal neutrino mixing and neutrinoless double beta decay
M. Hirsch, S. Morisi, J. W. F. Valle
We present a tri-bimaximal lepton mixing scheme where the neutrinoless double beta decay rate (bb0v) has a lower bound which correlates with the ratio alpha = Dmsol/Dmatm well dete…
Spontaneous R-parity violation: Lightest neutralino decays and neutrino mixing angles at future colliders
M. Hirsch, W. Porod, A. Vicente
We study the decays of the lightest supersymmetric particle (LSP) in models with spontaneously broken R-parity. We focus on the two cases that the LSP is either a bino or a neutral…
Phenomenology of neutrinoless double beta decay
M. Hirsch
Neutrinoless double beta decay violates lepton number by two units, a positive observation therefore necessarily implies physics beyond the standard model. Here, three possible con…
Thermal leptogenesis in extended supersymmetric seesaw
M. Hirsch, M. Malinsky, J. C. Romao +2
We consider an extended supersymmetric SO(10) seesaw model with only doublet Higgs scalars, in which neutrino masses are suppressed by the scale of D-parity violation. Leptogenesis…
Predicting Neutrinoless Double Beta Decay
M. Hirsch, Ernest Ma, J. W. F. Valle +1
We give predictions for the neutrinoless double beta decay rate in a simple variant of the A_4 family symmetry model. We show that there is a lower bound for the neutrinoless doubl…
Supersymmetric Origin of Neutrino Mass
M. Hirsch, J. W. F. Valle
Supersymmetry with breaking of R-parity provides an attractive way to generate neutrino masses and lepton mixing angles in accordance to present neutrino data. We review the main t…
CP violation in decays of the lightest supersymmetric particle with bilinearly broken R parity
M. Hirsch, T. Kernreiter, W. Porod
Supersymmetric models with broken R-parity induced by lepton number violating terms provide a calculable framework for neutrino masses and mixings. Within models with bilinear R-pa…
Probing neutrino properties with charged scalar lepton decays
M. Hirsch, W. Porod, J. C. Romao +1
Supersymmetry with bilinear R-parity violation provides a predictive framework for neutrino masses and mixings in agreement with current neutrino oscillation data. The model leads…
Testing neutrino mixing at future collider experiments
W. Porod, M. Hirsch, J. Romao +1
Low energy supersymmetry with bilinear breaking of R-parity leads to a weak-scale seesaw mechanism for the atmospheric neutrino scale and a radiative mechanism for the solar neutri…
Reconciling neutrino anomalies in a simple four-neutrino scheme with R-parity violation
M. Hirsch, J. W. F. Valle
We propose a simple extension of the MSSM based on extra compact dimensions which includes an singlet superfield. The fermion present in this superfield is the…
Neutrino Masses and Mixings from Supersymmetry with Bilinear R--Parity Violation: A Theory for Solar and Atmospheric Neutrino Oscillations
M. Hirsch, M. A. Diaz, W. Porod +2
The simplest unified extension of the MSSM with bi-linear R--Parity violation naturally predicts a hierarchical neutrino mass spectrum, in which one neutrino acquires mass by mixin…
Bilinear R-parity violating SUSY: Neutrinoless double beta decay in the light of solar and atmospheric neutrino data
M. Hirsch, J. C. Romao, J. W. F. Valle
Neutrinoless double beta ($\znbb$) decay is considered within bilinear R-parity breaking supersymmetry, including the full one-loop corrections to the neutrino-neutralino mass matr…
Collider Signatures of Sneutrino Cold Dark Matter
St. Kolb, M. Hirsch, H. V. Klapdor-Kleingrothaus +1
Decays of sneutrinos are considered in the case that in the presence of lepton-number violation in the sneutrino sector the lighter tau-sneutrino is the Lightest Supersymmetric Par…
Neutrinoless double beta decay, neutrino mass and bilinear R-parity breaking supersymmetry
M. Hirsch
Neutrinoless double beta ($\znbb$) decay violates lepton number; its absence stringently constrains the parameters of theories beyond the standard model in which the neutrino has a…
A Supersymmetric Solution to the Solar and Atmospheric Neutrino Problems
J. C. Romao, M. A. Diaz, M. Hirsch +2
The simplest unified extension of the Minimal Supersymmetric Standard Model with bi-linear R--Parity violation provides a predictive scheme for neutrino masses which can account fo…