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p.  p. A Schematic detector. Muon detector. Calorimeter Induces shower in dense material. Tracking system Magnetized volume. Interaction point. Innermost tracking layers use silicon. EM layers fine sampling. Absorber material. Hadronic layers. Electron.

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Presentation Transcript
A schematic detector

p

p

A Schematic detector

Muon detector

Calorimeter

Induces shower

in dense material

Tracking system

Magnetized volume

Interaction

point

Innermost

tracking layers

use silicon

EM layers

fine sampling

Absorber material

Hadronic

layers

Electron

Experimental signature

of a quark or gluon

Jet: q or g

Bend angle  momentum

Muon

“Missing transverse energy”

Signature of a non-interacting (or weakly

interacting) particle like a neutrino



Collisions at the tevatron

Advantages (re e+e-)

High Energy

Hard Scatter is QCD

Disadvantages (re e+e-)

Don’t know what’s colliding

Underlying Event

Hard Scatter is QCD

UnderlyingEvent

g

q

u

u

q

d

u

d

u

Hard Scatter

Collisions at the Tevatron

proton

anti-proton


DQH(z)

  • M(Q) >> qcd means

  • perturb calc for (NLO is normal)

  • higher order effects from dep on R,F

  • Universal non-perturb parts

  • PDFs and fragmentation

  • take from other meas’s

  • or meas using Q-prod

A

fi (x1)

Hard Interaction

B

fj (x2)

Incoming Particles

Parton Shower / Fragmentation

Arbitrary Definitions: Heavy Flavor c and b


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