The reports sounded in Chicago at the International Conference on High Energy Physics (ICHEP), buried the hopes of theoretical physicists at the opening of the Large Hadron Collider (LHC), the new massive particles.
And with them were sent to the trash five hundred scientific papers, had time to appear in the last six months
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The story of the mysterious new particle started in December last year, when the detectors of two experiments – Atlas and CMS – have recorded excessive birth of photons produced in the collision of high-energy proton accelerator. The photons in these experiments are born constantly, but at that time physicists frown caused excess photon energy with respect to predicted values,
and noticed it was independently by two different detectors, scientists, in fact ., competing teams
Yes, and data from detectors, differed little – all point to the existence of the world previously unknown to science particle is 15 times heavier than the iron atom mass 750 GeV
<. p> However, there were doubts about the new discovery. So, Tiziano Kamporezi, Head of CMS group, invited his colleagues to a dispute to 20 bottles of wine against one that the particles will not. “None of my colleagues did not agree to accept my argument. I will offer more and would love to lose “, – joked he then
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The situation was similar to the story of the discovery of the Higgs boson, predicted in 1964. For his discovery eventually was given the Nobel Prize. The controversy flared up, to spring the number of publications on the subject of the new particle has exceeded two hundred. Someone thought that opened heavier “relative” of the Higgs boson, or even its composite particle or she is the graviton, a carrier of gravity.
It is best processed data set and adding to the observations of 2015 the data for 2011 and 2012 , CMS team in March announced that they splash on the energy distribution graph has grown and reached statistical significance of 3.4 sigma, and then was adjusted to 1.6 sigma – still very shaky for some conclusions result. The Atlas said about the significance of 3.6 sigma, then 2 sigma – this means that the probability that the surge was accidental,
as small as five lined planted beads in a row. Yet it is
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That is why significantly significant in statistical surveys is considered to result from the 5 sigma above. Time passed, and the announcement of new results of physics waited on passing these days in Chicago ICHEP conference – the most prestigious international meeting of experts in the field of elementary particles, which planned the publication of new results, obtained after a spring trip Collider
«About a particle at 750 GeV CMS and Atlas reports resulted in less than an hour ago. Yes, absolutely resolved particle … in Atlas Peak moved towards 710-730 GeV, and the significance was less than 2 sigma, and CMS have disappeared completely, “- said” Gazeta.ru “MIPT employee, Cand . . Alexander Bilinkin participating in the conference
«What we have seen in the data in 2015, there was a surge, which although has a low statistical significance, but it has been a surge, a set of events with a mass of 750 GeV – said David Charlton, Atlas representative. – In this area, we do not see anything. We see a lot of events, but do not see the splash »
The main conclusion of the report is that scientists need more statistics
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«physicists were surprised that there was a surge of 750 GeV in two independent experiments. Coincidences always look strange. But do not forget: two-photon excess – this is just one of the many searches that we do, “- said Charlton
« Still 3 sigma – this is quite enough.. And when people want to convince yourself of something, it is easy to do and a 3-sigma, and it is directly related to the budgets of the experiment, which must be constantly something to justify – shared his opinion of Doctor of Physical and Mathematical Sciences, an expert on. elementary particles Andrey Rostovtsev. – The same story has been several times to the quark-gluon plasma, which is repeatedly seen in different places and with superluminal neutrinos,
have been other cases in which the importance of reaching and 10 Sigma, when the experiment H1 was “found” a particle of 4 quarks. »
According to physics, scientists are convinced that beyond the boundaries of the standard model, there is something that remains to be seen differently the world described it, is, as physicists say, “non-self”. Therefore, it is actively conducting a search for new particles, fields, and events, and therefore even small deviations from the theory of the soul force “so vibrate” physicists.
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