Presentation on theme: "Why LHC? Tara Shears, University of Liverpool. To understand the universe … Fundamental particles atoms stars and galaxies NOW Investigate with astrophysics,"— Presentation transcript:
To understand the universe … Fundamental particles atoms stars and galaxies NOW Investigate with astrophysics, using telescopes BIG BANG Investigate with particle physics, using particle accelerators. LHC is key.
How LHC helps LHC: creates fundamental particles in proton beam collisions Experiments: take 3D digital snapshots of particles produced in collisions Computers: reconstruct and identify particles detected in experiment Theory: infer which fundamental particles were originally created in collision Repeat ……….
Higgs; starting from this event… We look for this signature Selectivity: 1 in 10 13 Like looking for 1 person in 1000 world populations Or for a needle in 20 million haystacks! making sense of the data 40,000,000 proton-proton collisions/second ~100,000,000 electronic channels 0.0002 Higgs per second
HOW do we find anything? Distributed Computing Solution – Grid Concorde (15 Km) Balloon (30 Km) CD stack with 1 year LHC data! (~ 20 Km) Mt. Blanc (4.8 Km) …. a needle in 20 million haystacks! LHC produces enough data to fill 14 million cds / year (1,000,000 times world annual book production!!) Estimated we need 100,000 computers to analyse it all …..
grid! > 5000 computers at 17 sites in UK > 1 million computing jobs ran last year
Whats out there …. ? ……… wait and see what LHC tells us. Extra dimensions? Black holes? Higgs Particles? Strings?