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Have they found the Higgs boson at last? Cern physicists say they're confident of breakthrough Steve Connor Steve Connor is the Science Editor of The Independent. He has won many awards for his journalism, including five-times winner of the prestigious British science writers’ award; the David Perlman Award of the American Geophysical Union; twice commended as specialist journalist of the year in the UK Press Awards; UK health journalist of the year and a special merit award of the European School of Oncology for his investigative journalism. He has a degree in zoology from the University of Oxford and has a special interest in genetics and medical science, human evolution and origins, climate change and the environment. Thursday 14 March 2013 A new sub-atomic particle that could explain one of the great mysteries of the Universe – why matter has mass – has almost certainly been found according to further evidence supporting the discovery of the elusive Higgs boson. Scientists at the European Organisation for Nuclear Research (Cern) in Geneva said yesterday they are increasingly confident that they have finally found the Higgs particle nearly 50 years after it was first proposed by Professor Peter Higgs of Edinburgh University. Further analysis of data gathered by Cern’s Large Hadron Collider (LHC) show that the new sub-atomic particle announced last summer bears one of the classic signatures of the proposed Higgs boson – it does not spin or rotate like all other known sub-atomic particles. The fact that this new particle is “spin zero”, combined with further evidence based on the way it decays into other known sub-atomic particles, is a convincing indication that it is indeed the Higgs boson, said Professor Dave Charlton of Birmingham University, a spokesman for the LHC’s Atlas experiment. “It looks more and more likely that we really have found the Higgs particle, although it’s always difficult to say this with absolute certainty. Most physicists would now agree that this is probably the Higgs,” Professor Charlton said. Professor Higgs, along with other colleagues, first suggested in the 1960s that a sub-atomic particle must pervade the Universe and create an invisible field on which matter interacts to give it mass, whether it is people or planets. It has only been in recent years that particle physicists have been able to build a particle accelerator big enough to produce the energies needed to create the sort of sub-atomic collisions that would shake out the Higgs particle to reveal its identity. The LHC produced enough high-energy collisions for physicists to begin to see tantalising hints of the Higgs last summer. Since then, that have trawled through the data to produce further evidence, released today at the Moriond Conference in La Thuile, Italy. “The preliminary results with the full 2012 data set are magnificent and to me it is clear that we are dealing with a Higgs boson though we still have a long way to go to know what kind of Higgs boson it is,” said Joe Incandela, a spokesman for the CMS experiment on the LHC. The Standard Model of physics, which attempts to unify many of the disparate forces of nature, from weak electrostatic interactions to the strong nuclear forces at the heart of the atom, suggests that the Higgs will have certain properties. But further work is needed to see whether the new particle conforms to this prediction, Professor Charlton said. “The spin-zero finding tells us it is a Higgs particle but the question of whether it is the Standard Model Higgs or a more exotic particle remains open. We’ve only just started down that road, although at the moment it is consistent with the Standard Model,” Professor Charlton said. Geoff Hall, professor of physics at Imperial College in London said: “The results are an indication of further excellent progress with the analysis of the data taken last year and the superb performance of the LHC accelerator and experiments. Nothing has emerged which conflicts with the assignment of the new particle as a Higgs boson.” - 1 Scientists create crystal which would allow us to breathe underwater - 2 Will Pluto be reinstated as a planet? - 3 Sex and the City 3? 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Slavni fizičar Peter Higgs, koji je šezdesetih godina prošlog stoljeća predvidio postojanje temeljne subatomske čestice, kasnije nazvane Higgsov bozon, rekao je da su nedavna otkrića u Europskom centru za nuklearna istraživanja (CERN) dokazala da je bio u pravu Eksperimentalna potvrda postojanja Higgsova bozona, koji je u javnosti poznat i kao "Božja čestica", bila je jedan od glavnih ciljeva rada novog CERN-ovog supersudarača atomskih čestica Large Hadron collidera (LHC) vrijednog 10 milijarda dolara. Higgs je novinarima u utorak kazao da je uvjeren kako je čestica pronađena u CERN-u u srpnju ove godine upravo ona čije je postojanje predvidio 1964. godine, prenosi Reuters. "Uvjeren sam da će se pokazati da je to (Higgsov bozon), samo je potrebno prikupiti dodatne informacije", rekao je Higgs (83). Podaci koji su dosad prikupljeni u LHC-u "predobro se poklapaju" s predviđanjima za Higgsov bozon, česticu koja prema Standardnom modelu elementarnih čestica daje masu svoj materiji, rekao je Higgs. "Kako vidim iz rezultata, još uvijek nije potpuno potvrđeno, ali je gotovo sigurno - spreman sam se okladiti da je to Higgsov bozon", rekao je belgijski fizičar Francois Englert, koji je također radio na teoretskom predviđanju te čestice. Premda su znanstvenici prije puno godina osmislili teoretski model postojanja tog bozona, bio je potreban golemi projekt izgradnje LHC-a, u kojemu je sudjelovalo više od stotinu zemalja, te dvogodišnji rad tog ubrzivača čestica kako bi se došlo do preliminarnih rezultata. Higgs je kazao da je takva vrsta znanstvene suradnje dobra ne samo za znanost već i za gospodarstva uključenih zemalja, navodi agencija Reuters. Znanstvenici CERN-a, međunarodnog instituta smještenog u Švicarskoj objavili su u srpnju da su otkrili novu subatomsku česticu koja bi mogla biti Higgsov bozon. Nakon potvrde postojanja te čestice, znanstvenici su se fokusirali na precizna mjerenja svojstava te nove čestice kako bi se dokazalo da je zaista riječ o "Božjoj čestici". LHC je najvažniji CERN-ov projekt, a počeo je raditi u kolovozu 2008. godine. Sastoji se od podzemnog prstena opsega gotovo 27 kilometara smještenog na dubini između 75 i 150 metara i akceleratorskih struktura koje ubrzavaju čestice tijekom njihova kruženja kroz cijev. Duž prstena akceleratora, na mjestima gdje se snopovi sudaraju, smješteni su detektori koji prikupljaju informacije o česticama nastalim u sudarima i uvjetima koji su tada vladali. - Sviđa vam se članak? Preporučite ga prijateljima putem ovih servisa: Pošaljite mailom