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DTSTAMP:20261005T201511Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20100301T173000Z
DTEND:20100301T183000Z
UID:event612@bu.edu
URL:http://physics.bu.edu/internal/events/show/612
SUMMARY:Factorization at the LHC: From PDFs to Initial State Jets
DESCRIPTION:Featuring Wouter Waalewijn\, MIT\n\nPart of the HET Seminar Ser
	ies.\n\nAbstract: Measurements at the LHC or Tevatron often impose restrict
	ions on the hadronic final state\, e.g. requiring a certain number of jets.
	 These restrictions can probe the proton prior to the hard collision and in
	troduce a scale muB that is parametrically smaller than the hard partonic s
	cale of the collision. Above muB the colliding partons are part of initial 
	state jets and are described by "beam functions\," rather than being part o
	f protons.\n\nI will discuss the field theoretic definition of beam functio
	ns\, their renormalization group evolution\, and an OPE that relates them t
	o PDFs. I will also discuss a new type of inclusive measurement "isolated D
	rell-Yan" pp --;> X l^+ l^{-}\, where the observable allows forward radiati
	on but restricts the hadronic final state X to contain no central jets.  Th
	is isolation can be used to control backgrounds and also provides a means o
	f directly probing initial state radiation and testing initial state parton
	 shower Monte Carlo.
LOCATION: \, \, 
STATUS:CONFIRMED
CLASS:PUBLIC
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