2,492 research outputs found
Phenomenology of the minimal supersymmetric extension of the standard model
We discuss the minimal supersymmetric extension of
the standard model. Gauge couplings unify as in the MSSM, even if the scale of
breaking is as low as order TeV and the model can be
embedded into an SO(10) grand unified theory. The phenomenology of the model
differs in some important aspects from the MSSM, leading potentially to rich
phenomenology at the LHC. It predicts more light Higgs states and the mostly
left CP-even Higgs has a mass reaching easily 125 GeV, with no constraints on
the SUSY spectrum. Right sneutrinos can be the lightest supersymmetric
particle, changing all dark matter constraints on SUSY parameter space. The
model has seven neutralinos and squark/gluino decay chains involve more
complicated cascades than in the MSSM. We also discuss briefly low-energy and
accelerator constraints on the model, where the most important limits come from
recent searches at the LHC and upper limits on lepton flavour violation.Comment: 46 pages, 11 figure
Proposal for generalised Supersymmetry Les Houches Accord for see-saw models and PDG numbering scheme
The SUSY Les Houches Accord (SLHA) 2 extended the first SLHA to include
various generalisations of the Minimal Supersymmetric Standard Model (MSSM) as
well as its simplest next-to-minimal version. Here, we propose further
extensions to it, to include the most general and well-established see-saw
descriptions (types I/II/III, inverse, and linear) in both an effective and a
simple gauged extension of the MSSM framework. In addition, we generalise the
PDG numbering scheme to reflect the properties of the particles.Comment: 44 pages. Changed titl
Therapie des femoroazetabulären Impingements über die chirurgische Hüftluxation: Technik und Ergebnisse
Zusammenfassung: Die chirurgische Hüftluxation ist eine sichere und etablierte Technik für die Behandlung des femoroazetabulären Impingements. Die Komplikationsrate ist niedrig und mit der korrekten Technik, welche die Blutversorgung respektiert, tritt eine Femurkopfnekrose nicht auf. Die häufigsten Komplikationen sind milde ektope Ossifkationen und die Trochanterpseudarthrose. Die intraartikuläre Chirurgie schließt sowohl die azetabuläre wie auch femorale Korrektur ein. Klinisch kann in ca. 75-80% der Fälle ein gutes bis sehr gutes Resultat erzielt werden. Allerdings fällt die Erfolgschance beim Vorliegen fortgeschrittener degenerativer Veränderungen, welche eine Grad-1-Arthrose nach Tönnis überschreiten, rapide ab. Der Erhalt des Labrums hat einen signifikanten Einfluss auf das klinische Ergebnis und die radiologische Progression der Arthrose. Das Erhalten des Labrums scheint deshalb unabdingbar zu sei
Crystal Symmetry Lowering in Chiral Multiferroic BaTaFeSiO observed by X-Ray Magnetic Scattering
Chiral multiferroic langasites have attracted attention due to their
doubly-chiral magnetic ground state within an enantiomorphic crystal. We report
on a detailed resonant soft X-ray diffraction study of the multiferroic
BaTaFeSiO at the Fe and oxygen edges. Below
() we observe the satellite reflections ,
, and where . The dependence of the scattering intensity on X-ray polarization and
azimuthal angle indicate that the odd harmonics are dominated by the
out-of-plane (-axis) magnetic dipole while the
originates from the electron density distortions accompanying magnetic order.
We observe dissimilar energy dependences of the diffraction intensity of the
purely magnetic odd-harmonic satellites at the Fe edge. Utilizing
first-principles calculations, we show that this is a consequence of the loss
of threefold crystal symmetry in the multiferroic phase
Intergenerational transmission of height in a historical population: from taller mothers to larger offspring at birth (and as adults)
Background
Changes in growth and height reflect changes in nutritional status and health. The systematic surveillance of growth can suggest areas for interventions. Moreover, phenotypic variation has a strong intergenerational component. There is a lack of historical family data that can be used to track the transmission of height over subsequent generations. Maternal height is a proxy for conditions experienced by one generation that relates to the health/growth of future generations. Cross-sectional/cohort studies have shown that shorter maternal height is closely associated with lower birthweight of offspring.
Objective/Methods
We analyzed the maternal height and offspring weight at birth in the maternity hospital in Basel, Switzerland, from 1896–1939 (N=ca. 12,000) using GAMs.
Results
We observed that average height of the mothers increased by ca. 4 cm across 60 birth years, and that average birthweight of their children shows a similarly shaped and upward trend 28 years later. Our final model (adjusted for year, parity, sex of the child, gestational age, and maternal birthyear) revealed a significant and almost linear association between maternal height and birthweight. Maternal height was the second most important variable modeling birthweight, after gestational age. In addition, we found a significant association between maternal height and aggregated average height of males from the same birth years at time of conscription, 19 years later.
Conclusions
Our results have implications for public health: When (female/maternal) height increases due to improved nutritional status, size at birth—and subsequently also the height in adulthood of the next generation—increases as well. However, the directions of development in this regard may currently differ depending on the world region
Caricature and Hyperbole in Preservice Teacher Professional Development
Professional development (PD) “for diversity” aims to prepare teachers to support students from varying backgrounds to succeed, often in underresourced contexts. Although many teachers invite such inquiry as part of learning to teach, others resist “diversity” inquiry as extra to teaching, saying they cannot “do it all.” In this article, we discuss how preservice teachers at times caricature the requests of PD for diversity, hearing the task as a call to undertake superhuman tasks and to be people other than who they are. We argue that these caricatures require direct acknowledgment by both preservice teachers and teacher educators working in diverse contexts
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