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SUMMARY:Phenomenology of bottom-initiated processes at the LHC - Maria Ubi
 ali (Cambridge)
DTSTART:20141024T150000Z
DTEND:20141024T160000Z
UID:TALK54467@talks.cam.ac.uk
CONTACT:Damien George
DESCRIPTION:Several key processes at the LHC in the standard model and bey
 ond involve\nbottom quarks: single-top\, Higgs\, and weak vector boson ass
 ociated\nproduction. They can be described in QCD either in a 4-flavor or 
 5-flavor\nscheme. In the former\, bottom quarks appear only in the final s
 tate and are\ntypically considered massive final state particles. In 5-fla
 vor schemes\,\ncalculations include bottom quarks in the initial state\, t
 hey are simpler\nand allow the resummation of possibly large initial state
  logarithms of the\ntype log(Q/mb) into the bottom parton distribution fun
 ction (PDF)\, Q being\nthe typical scale of the hard process. An analogous
  classification can be\napplied to processes involving bottom quarks in th
 e final state\, in which\nthe b fragmentation acts like the b PDF. In this
  talk\, I describe a method\nfor assessing the impact of resummation of co
 llinear logarithms and provide\nan explanation of why and how a substantia
 l agreement between total cross\nsections can be obtained in the two schem
 es. I will describe the recent\nresults concerning the production of a hea
 vy charged Higgs boson at the\nLHC. Finally I discuss several generalizati
 ons of the proposed prescription\nand future perspectives.
LOCATION:Seminar Room B\, Rutherford Building\, Cavendish Laboratory
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