14.03.2013 The new particle is a higgs boson

At this week's Moriond Conference, the ATLAS and CMS collaborations presented preliminary new results of the searches for a higgs boson. Therefore, they analysed  two and a half times more data than was available for the discovery announcement in July. The properties of the particle make it look more and more like a Higgs boson. It remains to be seen, if these properties fully correspond to those predicted by the Standard Model of particle physics, or possibly the lightest of several bosons predicted in some theories that go beyond the Standard Model. Finding the answer to this question will take time.

'The beautiful new results represent a huge effort by many dedicated people. They point to the new particle having the spin-parity of a Higgs boson as in the Standard Model. We are now well started on the measurement programme in the Higgs sector,' said ATLAS spokesperson Dave Charlton.


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14.02.2013 First three-year LHC running period reaches a conclusion

On February 14th the for now last particle beams were circulating in the LHC. At 7.24 AM they were extracted from the accelerator ring which will be subject to numerous consolidation and maintenance work during the upcoming months.

This interuption of the data taking also gives the experiments the opportunity to upgrade their detectors. For example, the ATLAS calorimeter trigger system will be equipped with the so called nMCM boards. These electronic boards were developped in Heidelberg and help the trigger system to cope with the harsher running environment it has to face at the recommissioning of the LHC in 2015.

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04.07.2012 Discovery of a new Higgs-like boson at the LHC


At a seminar held at CERN today the ATLAS and CMS experiments presented their latest preliminary results in the search for the long sought Higgs particle. Both experiments observe a new particle in the mass region around 125-126 GeV.

'The search is more advanced today than we imagined possible,' said ATLAS spokesperson Fabiola Gianotti. 'We observe in our data clear signs of a new particle, at the level of 5 sigma, in the mass region around 126 GeV. The outstanding performance of the LHC and ATLAS and the huge efforts of many people have brought us to this exciting stage. A little more time is needed to finalize these results, and more data and more study will be needed to determine the new particle's properties.'

The results presented today are labelled preliminary. They are based on data collected in 2011 and 2012, with the 2012 data still under analysis.  Publication of the analyses shown today is expected around the end of July.

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23.11.2011 Exhibition and Presentation for the 'Day of the World Machine'

With a five day lasting exhibition and an evening program, the Department of Physics and Astronomy of the University of Heidelberg takes part in the Day of the World Machine. Particle physicists from 20 german universities celebrate two years of successful work since the start of the Large Hadron Collider. Further information:


04.10-05.10.2010 Third Detector Workshop of the Helmholtz Alliance 'Physics at the Terascale'

October 04-05, 2010, 3rd workshop for the Novel Detector Development within the Terascale Alliance takes place at the University of Heidelberg, on the Campus Im Neuenheimer Feld. The aim of this workshop is to bring together the German community active in detector development for particle physics and to discuss latest results and perspectives within the alliance detector projects and beyond.

30.03.2010 First Collisions at 7 TeV

On Tuesday afternoon, for the first time the LHC achieved 7 TeV collisions and ATLAS recorded their first proton-proton collision events at this record energy.


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11.01-13.01.2010 ATLAS L1Calo Trigger Meeting

The ATLAS group at KIP hosts the first Level-1 Calorimeter Trigger Joint Meeting after restart of the LHC. Topics are trigger operation, first performance results, status of the calibration, as well as upgrade options. The meeting takes place at the International Wissenschaftsforum of the Heidelberg University.


28.11-20.12.2009 LHC Exhibition

What is the LHC? Scientists from all over the world want to gain insight into the Big Bang using this huge research instrument. From November 28 to December 20, right in time for the restart of LHC, the exhibition Weltmaschine ('World Machine') is hosted at KIP.

20.11.2009 The LHC is back!

November 20, particle beams are once again circulating in the LHC. A clockwise circulating beam was established at ten o'clock in the evening, followed by a circulating beam in the other direction a few hours later. The first so-called 'Beam Splash' events were observed in the ATLAS-Detektor. For these events the beam in one arm of the LHC was dumped onto closed collimators located 140 meters upstream and downstream of ATLAS. The collision leads to a large number of detectable secondary particles longitudinally traversing the detector. A few days later, on 23rd November, the first collisions at 0.9 TeV total energy have been observed in ATLAS..


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24-25.07.2009 Hengstberger Symposium 'Extra Dimensions and Mini Black Holes'

July 24-25, 2009, the Hengstberger Symposium 'Extra Dimensions and Mini Black Holes' takes place at the Internationales Wissenschaftsforum Heidelberg (IWH). The symposium is organised by V. Lendermann (KIP) and S. Groot Nibbelink (ITP). The goal of the symposium is to bring together theoreticians and experimentalists in the fields of particle physics, astrophysics, cosmology and gravity, in order to discuss the present status of the searches for signatures of extra dimensions. The discussion is held especially considering the upcoming data taking at the Large Hadron Collider (LHC). A particular focus is placed on the hypothetic production of mini black holes predicted by models of extra dimensions.
On Saturday 25.07, at 7 pm, a public talk 'Black holes at the collider LHC?' takes place at the Old University Hall. The speaker is Prof. Siegfried Bethke, Director at the Max Planck Institute for Physics, Munich.



01.07.2009 Funding from the Federal Ministry of Education and Research for major research projects on the structure of matter

In the framework of its so-called Integrated Research Programme the Federal Ministry of Education and Research will be providing funding to the tune of 7 million euros to assure the participation of Heidelberg University's nuclear and elementary-particle physicists in major research projects investigating the structure of matter. In the upcoming three-year funding period beginning in early July, this again puts Heidelberg's physicists right at the head of the field competing for integrated research funding in Germany. Heidelberg's Institutes of Physics have so far received funding amounting to some 22.9 million euros from the Integrated Research Programme for (amongst other things) their involvement in experiments conducted with the Large Hadron Collider (LHC) at CERN in Geneva.


16.10.2008 KIP ATLAS research fellow wins Hengstberger Prize

The University of Heidelberg awards the Hengstberger Prize 2008 to four young talented researchers. The prize winners work in psychology, ancient history and physics. The prize money is given for the organisation of a symposium in the International Science Forum. Two out of the four prize winners are particle physicists Dr. Victor Lendermann (KIP, ATLAS experiment at CERN) and Dr. Stefan Groot Nibbelink (Institute for Theoretical Physics). In July 2009 they will organise a symposium on ''Extra Dimensions and Mini Black Holes''.


10.09.2008 First beam in the LHC

September 10, 2008, the first proton beam with an energy of 0.45 TeV ran through the whole ring of the Large Hadron Collider. The picture shows the energy loss of the beam in the ATLAS detector. Such energy loss occurs due to interactions of the beam with the machine elements or with the rest gas in the beam pipe.


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