18,577 research outputs found
Revising the Solution of the Neutrino Oscillation Parameter Degeneracies at Neutrino Factories
In the context of neutrino factories, we review the solution of the
degeneracies in the neutrino oscillation parameters. In particular, we have set
limits to in order to accomplish the unambiguous
determination of and . We have performed two different
analysis. In the first, at a baseline of 3000 km, we simulate a measurement of
the channels , and
, combined with their respective conjugate ones,
with a muon energy of 50 GeV and a running time of five years. In the second,
we merge the simulated data obtained at L=3000 km with the measurement of
channel at 7250 km, the so called 'magic baseline'. In both
cases, we have studied the impact of varying the detector
efficiency-mass product, , at 3000 km,
keeping unchanged the detector mass and its efficiency. At L=3000 km,
we found the existance of degenerate zones, that corresponds to values of
, which are equal or almost equal to the true ones. These zones
are extremely difficult to discard, even when we increase the number of events.
However, in the second scenario, this difficulty is overcomed, demostrating the
relevance of the 'magic baseline'. From this scenario, the best limits of
, reached at , for ,
0.975 and 0.99 are: 0.008, 0.015 and 0.045, respectively, obtained at
, and considering ,
which is five times the initial efficiency-mass combination.Comment: 40 pages, 18 figures; added references, corrected typos, updated Eq
(15c
FCNC and CP Violation Observables in a SU(3)-flavoured MSSM
A non-Abelian flavour symmetry in a minimal supersymmetric standard model can
explain the flavour structures in the Yukawa couplings and simultaneously solve
the SUSY flavour problem. Similarly the SUSY CP problem can be solved if CP is
spontaneously broken in the flavour sector. In this work, we present an
explicit example of these statements with a SU(3) flavour symmetry and
spontaneous CP violation. In addition, we show that it is still possible to
find some significant deviation from the SM expectations as far as FCNC and CP
violation are concerned. We find that large contributions can be expected in
lepton flavour violating decays, as and , electric dipole moments, and and kaon CP violating
processes as . Thus, these flavoured MSSM realizations are
phenomenologically sensitive to the experimental searches in the realm of
flavor and CP vioation physics.Comment: 56 pages, 12 figures; included new NLO contributions to nEDM from
charged Higgs, relevant figures updated, and analysis of O(1) coefficients;
added appendices and reference
Using automatic robot programming for space telerobotics
The interpreter of a task level robot programming system called Handey is described. Handey is a system that can recognize, manipulate and assemble polyhedral parts when given only a specification of the goal. To perform an assembly, Handey makes use of a recognition module, a gross motion planner, a grasp planner, a local approach planner and is capable of planning part re-orientation. The possibility of including these modules in a telerobotics work-station is discussed
Social and spatial heterogeneity in psychosis proneness in a multilevel case-prodrome-control study
To test whether spatial and social neighbourhood patterning of people at ultra-high risk (UHR) of psychosis differs from first-episode psychosis (FEP) participants or controls and to determine whether exposure to different social environments is evident before disorder onset
Evaluating Participatory Modeling: Developing a Framework for Cross-case Analysis
Participatory modeling is increasingly recognised as an effective way to assist collective decision-making processes in the domain of natural resource management. This paper introduces a framework for evaluating projects that have adopted a participatory modeling approach. This framework – known as the ‘Protocol of Canberra’ – was developed through a collaboration between French and Australian researchers engaged in participatory modeling and evaluation research. The framework seeks to assess the extent to which different participatory modeling practices reinforce or divert from the theoretical assumptions they are built upon. The paper discusses the application of the framework in three case-studies, two from Australia and one from the Pacific island of the Republic of Kiribati. The paper concludes with some comments for future use of the framework in a range of participatory modeling contexts, including fostering consideration of why and how different methodological approaches are used to achieve project aims and to build a collective vision amongst diverse stakeholders.participation, modeling, evaluation, complex systems science
SUSY Flavour at LHC7
The current 7 TeV run of the LHC experiment shall be able to probe gluino and
squark masses up to values of about 1 TeV. Assuming that hints for SUSY are
found by the end of a 2 fb run, we explore the flavour constraints on
the parameter space of the CMSSM, with and without massive neutrinos. In
particular, we focus on decays that might have been measured by the time the
run is concluded, such as and . We also briefly
show the impact such a collider--flavour interplay would have on a Flavoured
CMSSM.Comment: 4 pages, 3 figures. Preliminary version of arXiv:1111.0176, prepared
for the 2011 Europhysics Conference on High Energy Physics: HEP 2011 (EPS-HEP
2011), Grenoble, France, 21-27 July 201
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