About EPJ

The European Physical Journal (EPJ) is a series of peer-reviewed journals covering the whole spectrum of physics and related interdisciplinary subjects. EPJ is committed to high scientific quality in publishing and is indexed in all main citation databases.

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EPJ C Highlight - Better defining the signals left by as-yet-undefined dark matter at the LHC

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Schematic of an Effective Field Theory interaction between dark matter and the standard model.

New theoretical models that better describe the interaction between dark matter and ordinary particles advance the quest for dark matter

In the quest for dark matter, physicists rely on particle colliders such as the LHC in CERN, located near Geneva, Switzerland. The trouble is: physicists still don't exactly know what dark matter is. Indeed, they can only see its effect in the form of gravity. Until now, theoretical physicists have used models based on a simple, abstract description of the interaction between dark matter and ordinary particles, such as the Effective Field Theories (EFTs). However, until we observe dark matter, it is impossible to know whether or not these models neglect some key signals. Now, the high energy physics community has come together to develop a set of simplified models, which retain the elegance of EFT-style models yet provide a better description of the signals of dark matter, at the LHC. These developments are described in a review published in EPJ C by Andrea De Simone and Thomas Jacques from the International School for Advanced Studies SISSA, in Trieste, Italy.

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EPJ E Highlight - Asymmetrical magnetic microbeads transform into micro-robots

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Transformation of particle clusters while exposed to an oscillating external magnetic field.

Thanks to the ordering effects of two-faced magnetic beads, they can be turned into useful tools controlled by a changing external magnetic field

Janus was a Roman god with two distinct faces. Thousands of years later, he inspired material scientists working on asymmetrical microscopic spheres - with both a magnetic and a non-magnetic half - called Janus particles. Instead of behaving like normal magnetic beads, with opposite poles attracting, Janus particle assemblies look as if poles of the same type attract each other. A new study reveals that the dynamics of such assemblies can be predicted by modelling the interaction of only two particles and simply taking into account their magnetic asymmetry. These findings were recently published in EPJ E by Gabi Steinbach from the Chemnitz University of Technology, Germany, and colleagues at the Helmholtz-Zentrum Dresden-Rossendorf. It is part of a topical issue entitled "Nonequilibrium Collective Dynamics in Condensed and Biological Matter." The observed effects were exploited in a lab-on-a-chip application in which microscopic systems perform tasks in response to a changing external magnetic field.

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Regine von Klitzing wins the 2016 EPJE Pierre-Gilles de Gennes Lecture Prize

Regine von Klitzing wins the 2016 EPJE Pierre-Gilles de Gennes Lecture Prize.
Regine von Klitzing

The EPJE editors are pleased to announce that this year’s edition of the EPJE Pierre-Gilles de Gennes Lecture Prize goes to German physicist Regine von Klitzing. Von Klitzing was nominated for her important contributions to polymer physics, particularly concerning the structure of polyelectrolyte assemblies and functionalized/responsive microgels. The EPJE Pierre-Gilles de Gennes lecture will be delivered by von Klitzing in Grenoble, France, during the 4th International Soft Matter Conference which takes place from 12 to 16 September 2016.

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