pqcd and hadron collider phenomenology
DESCRIPTION
2005 Summer School. pQCD and Hadron Collider Phenomenology. C.-P. Yuan Michigan State University Tsinghua University, Beijing, China July 2005. (Revised from the lecture notes by Wu-Ki Tung). Quantum Chromodynamics. Why does QCD play such a crucial role in High Energy Phenomenology?. - PowerPoint PPT PresentationTRANSCRIPT
pQCD and Hadron Collider Phenomenology
2005 Summer School
C.-P. YuanMichigan State University
Tsinghua University, Beijing, China July 2005
(Revised from the lecture notes by Wu-Ki Tung)
Quantum Chromodynamics
Why does QCD play such a crucial role in High Energy Phenomenology?
• The parton picture language provides the foundation on which all modern particle theories are formulated, and all experimental results are interpreted.
• The validity of the parton picture is based empirically on an overwhelming amount of experimental evidence collected in the last 30-40 years, and theoretically on the Factorization Theorems of PQCD.
Key concepts: Ultra-violet divergences, bare Green fns, renormalization, RGE, anomalous dimensions,
renormalized G.Fs, … etc.
Analogies and correspondences (see later)
Analogies and correspondences (see later)
universal
,
extracted by global analysis
Theory
Input
Lepton-hadron Sc.
Hadron Collider Physics
hadrons
leptons, hadrons
partons, gauge bosons,
new particles
(universal) parton
Distributions
SM and New
physics
jet algorithms
hadronization models: MC
programs
frag. functions
Example: Charm Production in DIS Experiments
4-flv (M 0) calculation(ACOT):
Flavor creationFlavor excitation Overlap/subtraction
~ s ln(Q/M)
HE limit: approaches conventional ZM 4-flv LO (FE) + NLO (~ s)
Near Threshold: approx. 3-flv HQ calc.LO-FC (~ s) + O(s
2)
In the intermediate region, all three terms are needed to provide an accurate description of the physics.
Important HQ initiated Processes: Top and Higgs
Single Top Production:W
t
b
W
t
b
g
Higgs Production:
Apply it to Top Quark Phenomenology at Hadron Colliders
Tevatron and LHC
Beyond the Leading Order in QCD