Partculas Elementares (2009/2010)

Mrio Pimenta Lisboa, 9/2009

pimenta@lip.pt

Relatividade Restrita

A Relatividade Restrita

Intervalo de espao-tempo

Quadrivectores

E=mc2

It followed from the special theory of relativity that mass andenergy are both but different manifestations of the same thing -- asomewhat unfamiliar conception for the average mind. Furthermore,the equation E is equal to m c-squared, in which energy is put equalto mass, multiplied by the square of the velocity of light, showedthat very small amounts of mass may be converted into a very largeamount of energy and vice versa. The mass and energy were in factequivalent, according to the formula mentioned before. This wasdemonstrated by Cockcroft and Walton in 1932, experimentally.

Fission and fusion

Binding energy

Fission the splitting of an heavy atom

Fusion the fusing of light atoms into heavy atom

mass Kinetic Energy

Particle Physics

Collides high energyparticles and observeswhat comes out !

An example: the LEP @CERN

Kinetic Energy mass

DELPHI- the first WW event

Energia e momento

u (p1 p4)2 s + t + u = m12 + m22 + m32 + m42

Variveis de Mandelstam

Relatividade e partculas (I)

Relatividade e partculas (II)

Relatividade e partculas (III)

Relatividade e partculas (IV)

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