Publications (114)
Dark matter and LHC phenomenology in a left-right supersymmetric model
J. N. Esteves, M. Hirsch, W. Porod +3
Left-right symmetric extensions of the Minimal Supersymmetric Standard Model can explain neutrino data and have potentially interesting phenomenology beyond that found in minimal S…
Flow Equations for the Relevant Part of the Pure Yang-Mills Action
U. Ellwanger, M. Hirsch, A. Weber
Wilson's exact renormalization group equations are derived and integrated for the relevant part of the pure Yang-Mills action. We discuss in detail how modified Slavnov-Taylor iden…
Phenomenology of Dark Matter from A4 Flavor Symmetry
M. S. Boucenna, M. Hirsch, S. Morisi +3
We investigate a model in which Dark Matter is stabilized by means of a Z2 parity that results from the same non-abelian discrete flavor symmetry which accounts for the observed pa…
Quasi-Dirac neutrinos at the LHC
G. Anamiati, M. Hirsch, E. Nardi
Lepton number violation is searched for at the LHC using same-sign leptons plus jets. The standard lore is that the ratio of same-sign lepton to opposite-sign lepton events, $R_{ll…
Neutrinoless double beta decay, neutrino mass and bilinear R-parity breaking supersymmetry
M. Hirsch
Neutrinoless double beta ($\znbb$) decay violates lepton number; its absence stringently constrains the parameters of theories beyond the standard model in which the neutrino has a…
CP Phases, LFV, RpV & all that
A. Bartl, K. Hidaka, M. Hirsch +6
Most phenomenological analyses of searches for supersymmetric particles have been performed within the MSSM with real SUSY parameters and conserved R-parity and lepton flavour. Her…
Neutrino Masses and Mixings in SUSY with Broken R-Parity
M. Hirsch, W. Porod, M. A. Diaz +2
The simplest unified extension of the Minimal Supersymmetric Standard Model with bilinear R-Parity violation provides a predictive scheme for neutrino masses which can account for…
Discriminating Neutrino See-Saw Models
M. Hirsch, S. F. King
We consider how well current theories can predict neutrino mass and mixing parameters, and construct a statistical discriminator which allows us to compare different models to each…
Probing a Supersymmetric Model for Neutrino Masses at Ultrahigh Energy Neutrino Telescopes
M. Hirsch, D. P. Roy, J. W. F. Valle
A bilinear R-Parity breaking SUSY model for neutrino mass and mixing predicts the lightest superparticle to decay mainly into a pair of tau leptons or b quarks along with a neutrin…
Probing bilinear R-parity violating supergravity at the LHC
F. de Campos, O. J. P. Eboli, M. B. Magro +4
We study the collider phenomenology of bilinear R-parity violating supergravity, the simplest effective model for supersymmetric neutrino masses accounting for the current neutrino…
R-parity Conserving Supersymmetry, Neutrino Mass and Neutrinoless Double Beta Decay
M. Hirsch, H. V. Klapdor-Kleingrothaus, S. G. Kovalenko
We consider contributions of R-parity conserving softly broken supersymmetry (SUSY) to neutrinoless double beta ($\znbb$) decay via the (B-L)-violating sneutrino mass term. The lat…
High-dimensional neutrino masses
G. Anamiati, Oscar Castillo-Felisola, Renato M. Fonseca +2
For Majorana neutrino masses the lowest dimensional operator possible is the Weinberg operator at . Here we discuss the possibility that neutrino masses originate from higher…
Quasi Dirac neutrino oscillations
G. Anamiati, R. M. Fonseca, M. Hirsch
Dirac neutrino masses require two distinct neutral Weyl spinors per generation, with a special arrangement of masses and interactions with charged leptons. Once this arrangement is…
Supersymmetry and Neutrinoless Double Beta Decay
M. Hirsch, H. V. Klapdor-Kleingrothaus, S. G. Kovalenko
Neutrinoless double beta decay ($\znbb$) induced by superparticle exchange is investigated. Such a supersymmetric (SUSY) mechanism of $\znbb$ decay arises within SUSY theories with…
Neutrinos in Supersymmetry without R-Parity
M. Hirsch, M. A. Diaz, W. Porod +2
We show how Bilinear R-Parity violation within the Minimal Supersymmetric Standard Model can solve the atmospheric and solar neutrino problems by generating naturally small and hie…
WIMP dark matter as radiative neutrino mass messenger
M. Hirsch, R. A. Lineros, S. Morisi +3
The minimal seesaw extension of the Standard SU(3) x SU(2) x U(1) Model requires two electroweak singlet fermions in order to accommodate the neutrino oscillation parameters at tre…
The DES Science Verification Weak Lensing Shear Catalogues
M. Jarvis, E. Sheldon, J. Zuntz +92
We present weak lensing shear catalogues for 139 square degrees of data taken during the Science Verification (SV) time for the new Dark Energy Camera (DECam) being used for the Da…
Testing the Mechanism of R-parity Breaking with Slepton LSP Decays
A. Bartl, M. Hirsch, T. Kernreiter +2
In supersymmetric models R-parity can be violated through either bilinear or trilinear terms in the superpotential, or both. If charged scalar leptons are the lightest supersymmetr…
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…
Long-range contributions to double beta decay revisited
J. C. Helo, M. Hirsch, T. Ota
We discuss the systematic decomposition of all dimension-7 (d=7) lepton number violating operators. These d=7 operators produce momentum enhanced contributions to the long-range pa…
Dark matter in minimal supergravity with type-II seesaw
J. N. Esteves, M. Hirsch, S. Kaneko +2
We calculate the relic density of the lightest neutralino in a supersymmetric seesaw type-II (``triplet seesaw'') model with minimal supergravity boundary conditions at the GUT sca…
Charge Breaking Minima in the Broken R-parity Minimal Supersymmetric Standard Model
M. Hirsch, C. Hugonie, J. C. Romao +1
We reconsider the possible presence of charge and colour breaking minima in the scalar potential of the minimal supersymmetric standard model (MSSM) and its minimal generalization…
Mass and galaxy distributions of four massive galaxy clusters from Dark Energy Survey Science Verification data
P. Melchior, E. Suchyta, E. Huff +89
We measure the weak-lensing masses and galaxy distributions of four massive galaxy clusters observed during the Science Verification phase of the Dark Energy Survey. This pathfinde…
Supersymmetric SO(10) GUTs with sliding scales
C. Arbelaez, R. M. Fonseca, M. Hirsch +1
We construct lists of supersymmetric models with extended gauge groups at intermediate steps, all of which are based on SO(10) unification. We consider three different kinds of set…
High-Precision Determination of Oxygen-K Transition Energy Excludes Incongruent Motion of Interstellar Oxygen
M. A. Leutenegger, S. Kühn, P. Micke +25
We demonstrate a widely applicable technique to absolutely calibrate the energy scale of x-ray spectra with experimentally well-known and accurately calculable transitions of highl…
Neutrino masses, leptogenesis and dark matter in hybrid seesaw
Pei-Hong Gu, M. Hirsch, Utpal Sarkar +1
We suggest a hybrid seesaw model where relatively ``light''right-handed neutrinos give no contribution to the neutrino mass matrix due to a special symmetry. This allows their Yuka…
Neutrino properties and the decay of the lightest supersymmetric particle
M. Hirsch, W. Porod
Supersymmetry with broken R-parity can explain the neutrino mass squared differences and mixing angles observed in neutrino oscillation experiments. In the minimal model, where R-p…
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…
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…
Design considerations of the European DEMO's IR-interferometer/polarimeter based on TRAVIS simulations
K. J. Brunner, N. Marushchenko, Y. Turkin +4
Interferometry is the primary density control diagnostic for large-scale fusion devices, including ITER and DEMO. In this paper we present a ray tracing simulation based on TRAVIS…
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…
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…
Invisible neutron decay and light BSM particles
J. C. Helo, M. Hirsch, T. Ota
In Standard Model Effective Field Theory (SMEFT), invisible neutron decay arises from d = 12 operators. Adding new light particles to the field content of the SM, such as right-han…
B-L-violation in Softly Broken Supersymmetry and Neutrinoless Double Beta Decay
M. Hirsch, H. V. Klapdor-Kleingrothaus, S. G. Kovalenko
We prove a low-energy theorem valid for any model of weak scale softly broken supersymmetry. It claims that the neutrino Majorana mass, the B-L violating mass of the sneutrino and…
Systematic classification of two-loop realizations of the Weinberg operator
D. Aristizabal Sierra, A. Degee, L. Dorame +1
We systematically analyze the Weinberg operator at 2-loop order. Using a diagrammatic approach, we identify two different interesting categories of neutrino mass models: (i)…
On the observability of Majoron emitting double beta decays
M. Hirsch, H. V. Klapdor--Kleingrothaus, S. G. Kovalenko +1
Because of the fine--tuning problem in classical Majoron models in recent years several new models were invented. It is pointed out that double beta decays with Majoron emission de…
Short-range mechanisms of neutrinoless double beta decay at the LHC
J. C. Helo, M. Hirsch, H. Päs +1
Lepton number violation (LNV) mediated by short range operators can manifest itself in both neutrinoless double beta decay and in processes with same sign dilepton final states at…
B-L-violating Masses in Softly Broken Supersymmetry
M. Hirsch, H. V. Klapdor-Kleingrothaus, S. G. Kovalenko
We prove a general low-energy theorem establishing a generic relation between the neutrino Majorana mass and the superpartner sneutrino B-L-violating "Majorana"-like mass term. The…
Quasi-Dirac neutrino oscillations at DUNE and JUNO
G. Anamiati, V. De Romeri, M. Hirsch +2
Quasi-Dirac neutrinos are obtained when the Lagrangian density of a neutrino mass model contains both Dirac and Majorana mass terms, and the Majorana terms are sufficiently small.…
Exotic coloured fermions and lepton number violation at the LHC
E. Carquin, J. C. Helo, M. Hirsch +1
Majorana neutrino mass models with a scale of lepton number violation (LNV) of order TeV potentially lead to signals at the LHC. Here, we consider an extension of the standard mode…
Experimental tests for the Babu-Zee two-loop model of Majorana neutrino masses
D. Aristizabal Sierra, M. Hirsch
The smallness of the observed neutrino masses might have a radiative origin. Here we revisit a specific two-loop model of neutrino mass, independently proposed by Babu and Zee. We…
New Supersymmetric Contributions to Neutrinoless Double Beta Decay.
M. Hirsch, H. V. Klapdor-Kleingrothaus, S. G. Kovalenko
The neutrinoless double beta ($\znbb$) decay is analyzed within the Minimal Supersymmetric Standard Model with explicit R-parity violation (\rp MSSM). We have found new supersymmet…
Probing Neutrino Oscillations in Supersymmetric Models at the Large Hadron Collider
F. De Campos, O. J. P. Eboli, M. Hirsch +4
The lightest supersymmetric particle may decay with branching ratios that correlate with neutrino oscillation parameters. In this case the CERN Large Hadron Collider (LHC) has the…
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…
Image Analysis for Cosmology: Results from the GREAT10 Galaxy Challenge
T. D. Kitching, S. T. Balan, S. Bridle +25
In this paper we present results from the weak lensing shape measurement GRavitational lEnsing Accuracy Testing 2010 (GREAT10) Galaxy Challenge. This marks an order of magnitude st…
A superformula for neutrinoless double beta decay II: The short range part
H. Päs, M. Hirsch, H. V. Klapdor-Kleingrothaus +1
A general Lorentz-invariant parameterization for the short-range part of the 0vBB decay rate is derived. Combined with the long range part already published this general parameteri…
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…
Supersymmetry Parameter Analysis: SPA Convention and Project
J. A. Aguilar-Saavedra, A. Ali, B. C. Allanach +122
High-precision analyses of supersymmetry parameters aim at reconstructing the fundamental supersymmetric theory and its breaking mechanism. A well defined theoretical framework is…
Probing minimal supergravity in the type-I seesaw mechanism with lepton flavour violation at the CERN LHC
M. Hirsch, W. Porod, J. C. Romao +2
The most general supersymmetric seesaw mechanism has too many parameters to be predictive and thus can not be excluded by any measurements of lepton flavour violating (LFV) process…
Fermion masses, Leptogenesis and Supersymmetric SO(10) Unification
J. C. Romão, M. A. Tórtola, M. Hirsch +1
Current neutrino oscillation data indicate the existence of two large lepton mixing angles, while Kobayashi-Maskawa matrix elements are all small. Here we show how supersymmetric S…
Leptoquarks: Neutrino masses and accelerator phenomenology
D. Aristizabal Sierra, M. Hirsch, S. G. Kovalenko
Leptoquark-Higgs interactions induce mixing between leptoquark states with different chiralities once the electro-weak symmetry is broken. In such LQ models Majorana neutrino masse…
Neutrinoless double beta decay and lepton number violation at the LHC
J. C. Helo, M. Hirsch, S. G. Kovalenko +1
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 0νββde…
Scalar-mediated double beta decay and LHC
L. Gonzales, J. C. Helo, M. Hirsch +1
The decay rate of neutrinoless double beta decay could be dominated by short-range diagrams involving heavy scalar particles ("topology-II" diagrams). Examples are diagrams with di…
R-parity violation: Hide & Seek
M. Hirsch, W. Porod
We point out that, if R-parity is broken spontaneously, the neutralino can decay to the final state majoron plus neutrino, which from the experimental point of view is indistinguis…
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…
A new benchmark of soft X-ray transition energies of Ne, CO, and SF: paving a pathway towards ppm accuracy
J. Stierhof, S. Kühn, M. Winter +24
A key requirement for the correct interpretation of high-resolution X-ray spectra is that transition energies are known with high accuracy and precision. We investigate the K-shell…
Solar Neutrino Masses and Mixing from Bilinear R-Parity Broken Supersymmetry: Analytical versus Numerical Results
M. A. Diaz, M. Hirsch, W. Porod +2
We give an analytical calculation of solar neutrino masses and mixing at one-loop order within bilinear R-parity breaking supersymmetry, and compare our results to the exact numeri…
Towards a superformula for neutrinoless double beta decay
H. Päs, M. Hirsch, H. V. Klapdor-Kleingrothaus +1
A general Lorentz--invariant parameterization for the long-range part of the decay rate is derived. Combined with the short range part this general parameterization in te…
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…
Probing neutralino properties in minimal supergravity with bilinear R-parity violation
F. de Campos, O. J. P. Ãboli, M. B. Magro +5
Supersymmetric models with bilinear R-parity violation (BRPV) can account for the observed neutrino masses and mixing parameters indicated by neutrino oscillation data. We consider…
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…
Compensation of phase drifts caused by ambient humidity, temperature and pressure changes for continuously operating interferometers
K. J. Brunner, J. Knauer, J. Meineke +5
Fusion experiments rely heavily on the measurement of the line-integrated electron density by interferometry for density feed-back control. In recent years the discharge length has…
Minimal supergravity radiative effects on the tri-bimaximal neutrino mixing pattern
M. Hirsch, Ernest Ma, J. C. Romao +2
We study the stability of the Harrison-Perkins-Scott (HPS) mixing pattern, assumed to hold at some high energy scale, against supersymmetric radiative corrections. We work in the f…
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…
Majoron emission in muon and tau decays revisited
M. Hirsch, J. Meyer, W. Porod +1
In models where the breaking of lepton number is spontaneous a massless Goldstone boson, the Majoron (), appears. We calculate the theoretically allowed range for the branching…
Modelling tri-bimaximal neutrino mixing
M. Hirsch, S. Morisi, J. W. F. Valle
We model tri-bimaximal lepton mixing from first principles in a way that avoids the problem of the vacuum alignment characteristic of such models. This is achieved by using a softl…
New Low-energy Leptoquark Interactions
M. Hirsch, H. V. Klapdor-Kleingrothaus, S. G. Kovalenko
We discuss an extension of the standard model (SM) with vector and scalar leptoquarks. The renormalizable leptoquark Lagrangian consistent with the SM gauge symmetry is presented i…
Production and decays of supersymmetric Higgs bosons in spontaneously broken R-parity
M. Hirsch, J. C. Romao, J. W. F. Valle +1
We study the mass spectra, production and decay properties of the lightest supersymmetric CP-even and CP-odd Higgs bosons in models with spontaneously broken R-parity (SBRP). We co…
Invisible Higgs Boson Decays in Spontaneously Broken R-Parity
M. Hirsch, J. C. Romao, J. W. F. Valle +1
The Higgs boson may decay mainly to an invisible mode characterized by missing energy, instead of the Standard Model channels. This is a generic feature of many models where neutri…
Flavour violation at the LHC: type-I versus type-II seesaw in minimal supergravity
J. N. Esteves, M. Hirsch, W. Porod +3
We reconsider the role that the possible detection of lepton flavour violating (LFV) decays of supersymmetric particles at the Large Hadron Collider (LHC) can play in helping recon…
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…
Phenomenological Tests of Supersymmetric A_4 Family Symmetry Model of Neutrino Mass
M. Hirsch, J. C. Romao, S. Skadhauge +2
Recently Babu, Ma and Valle proposed a model of quark and lepton mixing based on symmetry. Within this model the lepton and slepton mixings are intimately related. We perform…
A4-based tri-bimaximal mixing within inverse and linear seesaw schemes
M. Hirsch, S. Morisi, J. W. F. Valle
We consider tri-bimaximal lepton mixing within low-scale seesaw schemes where light neutrino masses arise from TeV scale physics, potentially accessible at the Large Hadron Collide…
QCD running in neutrinoless double beta decay: Short-range mechanisms
M. González, M. Hirsch, S. G. Kovalenko
The decay rate of neutrinoless double beta () decay contains terms from heavy particle exchange, which lead to dimension-9 (d=9) six fermion operators at low energies. Lim…
LHC dijet constraints on double beta decay
J. C. Helo, M. Hirsch
We use LHC dijet data to derive constraints on neutrinoless double beta decay. Upper limits on cross sections for the production of "exotic" resonances, such as a right-handed W bo…
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…
Comment on: Neutrino Mass Anarchy
M. Hirsch
Recently Hall, Murayama and Weiner (Phys. Rev. Lett. 84 (2000) 2572, [hep-ph/9911341]) claimed that neutrino oscillation data are well accounted for by a neutrino mass matrix which…
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…
Cosmology from Cosmic Shear with DES Science Verification Data
The Dark Energy Survey Collaboration, T. Abbott, F. B. Abdalla +126
We present the first constraints on cosmology from the Dark Energy Survey (DES), using weak lensing measurements from the preliminary Science Verification (SV) data. We use 139 squ…
Proceedings of the 2nd Workshop on Flavor Symmetries and Consequences in Accelerators and Cosmology (FLASY12)
I. de Medeiros Varzielas, C. Hambrock, G. Hiller +66
These are the proceedings of the 2nd Workshop on Flavor Symmetries and Consequences in Accelerators and Cosmology, held 30 June 2012 - 4 July 2012, Dortmund, Germany.
Les Houches 2011: Physics at TeV Colliders New Physics Working Group Report
G. Brooijmans, B. Gripaios, F. Moortgat +141
We present the activities of the "New Physics" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 30 May-17 June, 2011). Our report includes new agreem…
Neutrinoless double beta decay in Supersymmetry with bilinear R-parity breaking
M. Hirsch, J. W. F. Valle
We reanalyze the contributions to neutrinoless double beta ($\znbb$) decay from supersymmetry with explicit breaking of R-parity. Although we keep both bilinear and trilinear terms…
Sneutrino-induced like sign dilepton signal with conserved R-parity
St. Kolb, M. Hirsch, H. V. Klapdor-Kleingrothaus +1
Lepton number violation could be manifest in the sneutrino sector of supersymmetric extensions of the standard model with conserved R-parity. Then sneutrinos decay partly into the…
Reconstructing Neutrino Properties from Collider Experiments in a Higgs Triplet Neutrino Mass Model
D. Aristizabal Sierra, M. Hirsch, J. W. F. Valle +1
We extend the minimal supersymmetric standard model with bilinear R-parity violation to include a pair of Higgs triplet superfields. The neutral components of the Higgs triplets de…
Predictive flavour symmetries of the neutrino mass matrix
M. Hirsch, Anjan S. Joshipura, S. Kaneko +1
Here we propose an flavour symmetry model which implies a lower bound on the neutrinoless double beta decay rate, corresponding to an effective mass parameter $M_{ee} \gsim 0…
Lepton number violation phenomenology of d=7 neutrino mass models
R. Cepedello, M. Hirsch, J. C. Helo
We study the phenomenology of d=7 1-loop neutrino mass models. All models in this particular class require the existence of several new multiplets, both scalar and fermio…
Broken R Parity, Neutrino Anomalies and Collider Tests
M. Hirsch, W. Porod, J. Romao +1
The solar and atmospheric neutrino anomalies constitute the only solid and most remarkable evidence for physics beyond the Standard Model, indicating that the lepton mixing matrix…
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…
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…
The impact of heating power on radial heat transport in W7-X
B. Ph. van Milligen, U. Hoefel, M. Hirsch +3
The understanding of the outward radial transport of heat in magnetic confinement fusion devices is a priority for the development of economically viable fusion reactors. Here, we…
R-parity violating sneutrino decays
D. Aristizabal Sierra, M. Hirsch, W. Porod
R-parity can be violated through either bilinear and/or trilinear terms in the superpotential. The decay properties of sneutrinos can be used to obtain information about the relati…
Extended Black Box Theorem for Lepton Number and Flavor Violating processes
M. Hirsch, S. Kovalenko, I. Schmidt
We revisit the well known "Black Box" theorem establishing a fundamental relation between the amplitude of neutrinoless double beta decay and the effective Majorana neutrino mass.…
Short-period X-ray oscillations in super-soft novae and persistent SSS
J. -U. Ness, A. P. Beardmore, J. P. Osborne +10
Transient short-period <100s oscillations have been found in the X-ray light curves of three novae during their SSS phase and in one persistent SSS. We pursue an observational appr…
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…
CP Studies and Non-Standard Higgs Physics
S. Kraml, E. Accomando, A. G. Akeroyd +163
There are many possibilities for new physics beyond the Standard Model that feature non-standard Higgs sectors. These may introduce new sources of CP violation, and there may be mi…
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…
Degenerate neutrinos from a supersymmetric A_4 model
M. Hirsch, J. C. Romao, S. Skadhauge +2
We investigate the supersymmetric A_4 model recently proposed by Babu, Ma and Valle. The model naturally gives quasi-degenerate neutrinos that are bi-largely mixed, in agreement wi…
Loop neutrino masses from d=7 operator
R. Cepedello, M. Hirsch, J. C. Helo
We discuss the generation of small neutrino masses from d=7 1-loop diagrams. We first systematically analyze all possible d=7 1-loop topologies. There is a total of 48 topologies,…
Collider signals of gravitino dark matter in bilinearly broken R-parity
M. Hirsch, W. Porod, D. Restrepo
In models with gauge mediated supersymmetry breaking the gravitino is the lightest supersymmetric particle. If R-parity is violated the gravitino decays, but with a half-live far e…
Improved bounds on SUSY accompanied neutrinoless double beta decay
H. Päs, M. Hirsch, H. V. Klapdor-Kleingrothaus
Neutrinoless double beta decay induced by light Majorana neutrino exchange between two decaying nucleons with squark/slepton exchange inside one and W exchange inside the other nuc…