2/27/2012 Katsushi Arisaka, UCLA 1

Katsushi Arisaka

University of California, Los Angeles

Department of Physics and Astronomy

arisaka@physics.ucla.edu

Why are we here?Origin of Universe and

Ourselves

2/27/2012 Katsushi Arisaka, UCLA 2Why are we here?

v

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Solar System

Sun Earth

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Andromeda

~100 Billions Stars in a Galaxy

2/27/2012 Katsushi Arisaka, UCLA 5~100 Billion Galaxies

Hubble Deep Field

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13 billion light years away(90% of speed of light)

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Hubble’s Law:Expansion of the Universe

Sun/Earth

Horizon of Universe

Moving Away at Speed of Light

14 BillonLight Years

Big Bang!

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Hubble Deep FieldPhysicists’ View of Early Universe

Fiat luxLet there be light

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CERN and LHC in Geneva

27 km Circumference

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LHC Tunnel with Magnets

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CMS Collaboration (1993 ~)

2/27/2012 Katsushi Arisaka, UCLA 12CMS

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CMS Barrel Yoke

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Installing muon Detectors

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Katsushi Arisaka, UCLASept 15, 2008 Issue

Particle detectorsconstructedat Westwood,now at LHC, CERN

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First Event at LHC – Recreation of the Big Bang! (Nov 7, 2009)2/27/2012 Katsushi Arisaka, UCLA 18

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2/27/2012 Katsushi Arisaka, UCLA 20Why are we here?

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Are there more than

one Universe?

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Linde’s Multiverseby Chaotic Inflation

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There may be ~100 Billion Universes.