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CERN Land

 
 
 
 
   
CERN experiments found the long-sought Higgs boson
The European Organization for Nuclear Research (CERN) announced preliminary confirmation on observing the Higgs boson. Both the ATLAS and CMS experiments observe a new particle in the mass region around 125-126 GeV.


“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 the global Grid have brought us to this exciting stage,” said ATLAS experiment spokesperson Fabiola Gianotti, “but a little more time is needed to prepare these results for publication.”

"The results are preliminary but the 5 sigma signal at around 125 GeV we’re seeing is dramatic. This is indeed a new particle. We know it must be a boson and it’s the heaviest boson ever found,” said CMS experiment spokesperson Joe Incandela. “The implications are very significant and it is precisely for this reason that we must be extremely diligent in all of our studies and cross-checks."

The preliminary results presented today 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. A more complete picture of today’s observations will emerge later this year after the LHC provides the experiments with more data.

“〔on confirming the existence of the Higgs boson〕It's really an incredible thing that it's happened in my lifetime,” said Dr. Peter Higgs, the Edinburgh professor who first proposed the Higgs boson theory. “We have reached a milestone in our understanding of nature,” said CERN Director General Rolf Heuer. “The discovery of a particle consistent with the Higgs boson opens the way to more detailed studies, requiring larger statistics, which will pin down the new particle’s properties, and is likely to shed light on other mysteries of our universe.”

Dr. Simon C. Lin, from the Institute of Physics at Academia Sinica, who has long been participating in the Worldwide LHC Computing Grid (WLCG) project with the Academia Sinica Grid Computing Centre (ASGC) research team indicated that “Because the brightness of the LHC had been raised by 10 times and the steady analytical computing provided by the global grid, we are able to see such exciting result even though only one-third of the data in 2012 was analyzed by the experiment teams.”As Dr. Rolf Heuer said in his conclusion, “Three most important elements in today’s accomplishment are: LHC experiment, the detectors, and the global Grid.”

Positive identification of the new particle’s characteristics will take considerable time and data. But whatever form the Higgs particle takes, our knowledge of the fundamental structure of matter is about to take a major step forward. Since 1999, the National Science Council in Taiwan has supported the participation in the CMS experiment from the Department of Physics in both National Taiwan University and National Central University, the participation in the ATLAS experiment from the Institute of Physics at the Academia Sinica, and the establishment of the global Grid of the Academia Sinica Grid Computing Centre (ASGC). In response to the invitation from CERN in 2005, ASGC officially became the Asian centre of the global Grid, the only WLCG Tier-1 Centre in Asia and an important member of this large distributed computing instrument. Since the beginning of the experiment, more than 100 Petabyte worth of data has been accumulated, and as much as around 1.5 million jobs can be steadily processed and completed per day. In the past two years since the experiment officially started, ASGC has executed about 10% of the total jobs in average, over 17 Petabyte of data throughput, from the two LHC experiments, ATLAS and CMS, in which Taiwanese research teams participated.

 
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