Wednesday, Jan. 31, 2007PHYS 5326, Spring 2007 Jae Yu 1 PHYS 5326 – Lecture #4 Wednesday, Jan. 31, 2007 Dr. Jae Yu 1.QCD Evolution of PDF 2.Measurement.
Jan 19, 2018
Wednesday, Jan. 31, 2007PHYS 5326, Spring 2007 Jae Yu 1 PHYS 5326 Lecture #4 Wednesday, Jan. 31, 2007 Dr. Jae Yu 1.QCD Evolution of PDF 2.Measurement of Sin 2 W 3.Formalism of Sin 2 W in -N DIS 4.Improvements in Sin 2 W 5.Interpretation of Sin 2 W and Its Link to Higgs Wednesday, Jan. 31, 2007PHYS 5326, Spring 2007 Jae Yu 2 Factorization Non-perturbative, infra-red part kk W + (W - ) p , } E Had P q= k-k q, ( q) xPxP Partonic hard scatter =f* p f pp Wednesday, Jan. 31, 2007PHYS 5326, Spring 2007 Jae Yu 3 DGLAP QCD Evolution Equations The evolution equations by D okshitzer- G ribov- L ipatov- A ltarelli- P arisi provide mechanism to evolve PDFs to any kinematic regime or momentum scale P ij (x/y): Splitting function which describes the probability for a parton i with momentum y get resolved as a parton j with momentum x180 GeV) Precise measurement of e flux in the tail region of flux ~35% more e in than predicted Had to require (E had
