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RWTH Aachen Particle Physics Theory

Autumn school in Maria Laach

October 3rd, 2014 | by
The monastery of Maria Laach, foto by Andreas Künsken

(c) by Andreas Künsken

One of our PhD students, Lennart, participated at the recent autumn school for High Energy Physics in Maria Laach. This school is aimed at PHD students in theoretical and experimental high energy physics and besides particle physics, it also gives you an insight into the live in a monastery…
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Species

August 9th, 2014 | by

The origin and size of the neutrinos masses is one of the unsolved mysteries in High energy physics. Their masses must be very small (< 1eV) in comparison to the other elementary particles: if the neutrino had the weight of a house mite, the top quark would have the mass of a sperm whale! For theorists, this hierarchy in the masses is really unsatisfying, and the question is if there is a mechanism that makes the neutrino mass automatically that small.

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Susy edges

August 2nd, 2014 | by

Two weeks ago, the  SUSY conference took place in Manchester, and we already had a nice report from Mathieu and Jory here in our blog. However, I also want to draw your attention to this talk about an overview of CMS searches for supersymmetric particles at the LHC. Generic searches for supersymmetric particles depend mainly on two possible observations: in most supersymmetric scenarios, one has a lightest stable supersymmetric particle (that can play the role of the dark matter candidate). This particle, if produced at a collider like the LHC, does not decay any more (stable!) and does not leave any trace in the detectors. No trace? No! Read the rest of this entry »

Back from the SUSY conference

July 29th, 2014 | by

Jory and Mathieu are PHD students working on beyond the standard model physics. They presented their current projects (click and click) at the SUSY 2014 conference in Manchester last week. Read on about their experiences at the conference…

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Schüleruni Physik

July 21st, 2014 | by

logo4_hell_merge

This week we have the “Schüleruni Physik “. 25 very motivated high school students aged 16-18 visit the institute to get an impression of life at the university and get some insight in whether they like to study physics at the RWTH. This year, we have planned great talks about particle physics at the collider and in space. In the afternoon, the students have the possibility to experiment and visit labs.

If you have missed to apply for this year, go here to find out about other RWTH events for high school students.

Dark matter mysteries

July 20th, 2014 | by

The bullet cluster are two galaxy clusters roughly 3.8 billion light years away in the Carina constellation in the southern sky.  Galaxy clusters are gravitationally bound accumulations of galaxies. The bullet cluster is an object of particular interest: Since its discovery in 1995, it has been an object of study with different observation methods. In the optical light, there seem to be two separate galaxy clusters with a distance of roughly 0.7 Mpc. The X-ray observation reveals, that these two galaxy cluster collided in the past and are now separating again. The bullet cluster is a textbook example for such two objects interacting, leading to a bow shock which can be nicely studied in the X-ray image of the object. However, there is something else which is very interesting about this object: The collision separates two components of the galaxy clusters, namely the luminous mass of the cluster and the main mass components of the cluster, that can not be seen in the optical or X-ray region. This hints towards a large amount of dark matter taking part in the collision. And this makes it very interesting for particle physicists as well! Read the rest of this entry »

Are there leptoquarks?

July 16th, 2014 | by

leptoquarks
Leptoquarks are interesting objects: These (so far) hypothetical particles are able to connect a single Lepton and a single quark in one interaction. For triggering such an interaction, leptoquarks have to carry both lepton number (such as leptons) and baryon quantum number (such as quarks). Hence the name: Lept-o-quark.

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This year’s Bachelor projects

July 14th, 2014 | by

In our pheno group we had a whole bunch of Bachelor students which have now submitted their Bachelor theses. Some of the themes are roughly related to the actual projects we are working on at the moment, otherwise we tried to cover current topics in particle physics. And these are the topics:

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A Higgs or not a Higgs?

July 12th, 2014 | by

higgs

It has been exactly two years now since the two big experiments Atlas and CMS at the LHC announced the discovery of a new boson. This boson is so far hotly tipped to be the Standard Model Higgs particle. What does “being the Standard model Higgs particle” mean, are particle physicists sure about that and how do they come to their conclusion?

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