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EDUSAFE & ATLAS

EDUSAFE & ATLAS. MNe. The LHC (large hadron collider). Our playground (27 km of circumference). Large Hadron Collider (LHC). (27 km of circumference, 100 m underground). ~ - 271 o C. The hottest spots in the galaxy… and around it we place a fancy “microscope”.

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EDUSAFE & ATLAS

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  1. EDUSAFE & ATLAS MNe

  2. The LHC (large hadron collider) Our playground (27 km of circumference)

  3. Large Hadron Collider (LHC) (27 km of circumference, 100 m underground) ~ - 271 oC

  4. The hottest spots in the galaxy… and around it we place a fancy “microscope” When two beams of protons collide, they generate temperatures 1000 million times hotter than the heart of the sun, but in a minuscule space.

  5. The ATLAS detector

  6. Why ATLAS ? The SM is: SU(3)C x SU(2)L x U(1)Y mg = 0 mg = 0 mW = 0 in the SM w/o Higgs mZ = 0 Experimentally, mW,Z≠ 0 Fundamental particles and forces (SM)

  7. Fundamental particle and forces (SM) Many free parameters ~28 Photons and gluons massless Spontaneous symmetry breaking is ascribed to a field that permeates all space Brout-Englert-Higgs (BEH) field Broken Symmetry and the Mass of Gauge Vector Mesons
F. Englert and R. Brout, Phys. Rev. Lett. 13, 321 (1964) Broken Symmetries and the Masses of Gauge Bosons
Peter W. Higgs, Phys. Rev. Lett. 13, 508 (1964)Global Conservation Laws and Massless Particles
G. S. Guralnik, C. R. Hagen, and T. W. Kibble, Phys. Rev. Lett. 13, 585 (1964)

  8. Discovery announcement end 2011 3 events in the m4l range 123.6-124.6 GeV: two 2e2μ andone 4μ H  ZZ(*)  4l (4e, 4μ, 2e2μ) H  γγ m~126 GeV:

  9. H  g g Best fit mass: Signal strength: Observed significance: 7.4s

  10. H  ZZ Best fit mass: Signal strength: Observed significance: 6.6 s

  11. Higgs found @ LHC

  12. Is this the final picture ? The SM is: SU(3)C x SU(2)L x U(1)Y mg = 0 mg = 0 mW = 0 in the SM w/o Higgs mZ = 0 Experimentally, mW,Z≠ 0

  13. Today we know that something is wrong with this picture!

  14. … There might be more complexity …. and for sure more questions • Can there be a symmetry between fermions and bosons (SUSY)? • Many, many nice features, including providing a possible candidate for dark matter • Are lepton and quark truly fundamental, or are they composite? • Are there more than 3 generations of lepton and quarks? Of neutrinos? • Can strong force be unified with EW interactions (GUT)? • How to include gravity? Extra-dimensions? Strings? • What is the origin of the CP violation (matter-antimatter asymmetry) • What is the origin of the neutrino mass? More neutrinos? • What is the nature of the dark energy?

  15. … a lot of confusion among theorists [Hitoshi Murayama] Need experiments to figure out which (if any) represents Nature

  16. What can we offer to EDUSAFE ? An incredibly modern and stimulating environment : - 3000 scientists working together in ~180 institutions, 38 Nations - a vast education plan with more then 1000 students involved - a very modern environment with a lot of technologies - an intellectual stimulating environment full of new ideas and plans for the future - a extreme level of complexity, rare to find elsewhere - a different and novel approach to cooperation and innovation

  17. What can we offer to EDUSAFE ? An incredibly complex environment : - a complex and busy environment 100 m underground - electricity hazards ( ~ 10 MW) - all possible gases (explosive and not) : CO2, Xe, N2, Ar, Npentane, C3F8, … - a cryogenic environment with cryo liquids and gas (4K) - the largest magnetic field ever built (1-2 T) - radio protection needs

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