Geneva, 14 July 2015. Today, the LHCb experiment at CERN’s Large Hadron Collider has reported the discovery of a class of particles known as pentaquarks. The collaboration has submitted a paper reporting these findings to the journal Physical Review Letters.
“The pentaquark is not just any new particle,” said LHCb spokesperson Guy Wilkinson. “It represents a way to aggregate quarks, namely the fundamental constituents of ordinary protons and neutrons, in a pattern that has never been observed before in over fifty years of experimental searches. Studying its properties may allow us to understand better how ordinary matter, the protons and neutrons from which we’re all made, is constituted.”
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…………. The Higgs boson, a sub-atomic particle that pervades the Universe, is crucial to something called the Standard Model, which attempts to unite the building blocks of matter with three of the four known forces of nature – only gravity is left out.
Until Peter Higgs, Francois Englert and Robert Brout came along with their theory in 1964, the Standard Model was under threat because it could not explain how sub-atomic particles – and hence all matter in the Universe – have mass and therefore structure.
The proposition of a sub-atomic particle that creates a field through which other particles interact was the missing piece of the puzzle. It is this interaction between matter and the field created by the Higgs boson that imparts mass to matter. ………..
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By Richard Gray, Science Correspondent of The Telegraph
Large Hadron Collider: results hint at where all the antimatter has gone.
Scientists at the Large Hadron Collider have seen tantalising clues that may help to explain why the universe around us is made from matter rather than its opposite form antimatter.
Researchers hunting for antimatter at CERN, the city sized science complex where the LHC is based, have found that particles of matter decay differently from their antimatter cousins.
Current theories suggest that after the Big Bang that created the universe, there were equal amounts of matter and antimatter created.
However, when particles of matter meet their antimatter opposites, they annihilate each other with an explosion of energy. ………………..
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Lalarukh Hussain died of brain hemorrhage on Wednesday, March 20, 2013 in Los Angeles. She was “Lali” for those close to her. No one who met her can forget the eversmiling fresh face of hers.
She joined the left-wing National Students Federation in the late 1960s and participated in the movement against Gen. Ayub Khan’s military dictatorship. She was a high quality journalist and worked for several newspapers and magazines of Pakistan. In her journalistic career she became editor of a couple of magazines. She earned her degree in journalism from the University of Karachi in 1972.
She was active member of Karachi Union of Journalists (KUJ) and PFUJ. During the military dictatorship of Gen. Ziaul Haq in 1978 she was in the forefront of the historic movement of journalists for press freedom spearheaded by PFUJ. She joined the hunger strike. She, in a brave manner, courted arrest with her one year old child.
She participated in the struggle of factory workers, teachers and women for their rights. Her life will always inspire those who fight against dictatorship and tyranny for the peoples’ rights, justice and democracy.