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But scientists stress caution over these "excess events", because similar wrinkles have been detected before only to disappear after further analysis. Either way, if the sub-atomic particle exists it is running out of places to hide, says the head of the European Organization for Nuclear Research (Cern), which runs the LHC. He told BBC News the collider had now ruled out more of the "mass range" where the Higgs might be. The new results are based on analyses of one inverse femtobarn of data, gathered as the vast machine smashes beams of protons together at close to light-speed.
Scientists from two different experiments (Atlas and CMS) based at the LHC are scouring the wreckage of these collisions. One of their primary goals is to search for hints of the Higgs, which is the last missing piece in the Standard Model - the most widely accepted theory of particle physics. Without the Higgs, physicists cannot explain why particles have mass. But despite the best efforts of scientists working on both sides of the Atlantic to detect it experimentally, the boson remains a theoretical sub-atomic particle.
Rolf-Dieter Heuer, director-general of Cern, said the amount of data gathered was a factor of 20 greater than had been amassed at the same time last year. "With one inverse femtobarn, you cannot cover the entire mass region which is allowed for the Higgs boson," Professor Heuer told me. "However, the experiments can now - unfortunately - exclude quite a large part of this allowed mass region."
Physicists think the Higgs will most probably be found in the low-mass region - between 114 GeV (gigaelectronvolts) and 140 GeV. While the gigaelectronvolt is a unit of energy, in particle physics, mass and energy can be interchanged because of Einstein's equivalence idea (E=MC2). Professor Heuer said that searches at low masses had picked up small fluctuations "here and there", but that this was expected because physicists were analysing small numbers across a number of different "channels".
More BBC News - Higgs hunt results excite scientists
