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SUMMARY:Numerical Multi-loop Computations: HJ and HH production at the LHC
  - Stephen Jones (CERN)
DTSTART:20190124T160000Z
DTEND:20190124T170000Z
UID:TALK115273@talks.cam.ac.uk
CONTACT:Mathieu Pellen
DESCRIPTION:The detailed exploration of the Higgs sector is one of the key
  tasks of the physics program at the LHC. The production of a Higgs boson 
 with large transverse momentum in association with a jet\, as well as the 
 production of a pair of Higgs bosons via gluon fusion\, are processes whic
 h can provide a sensitive probe of the electroweak symmetry breaking mecha
 nism. However\, theoretical predictions for these processes receive very l
 arge perturbative corrections\, which can enhance the predicted cross-sect
 ion by approximately a factor of two. In this talk\, I will present the ca
 lculation of the next-to-leading order QCD corrections to these processes 
 including the full top-quark mass dependence. These corrections involve tw
 o-loop integrals which are currently not known analytically. A procedure t
 o numerically calculate these integrals\, based on sector decomposition an
 d quasi-Monte Carlo integration\, will be described. Furthermore\, a publi
 cly available program\, pySecDec\, which automates the numerical computati
 on of such dimensionally regulated parameter integrals and its recent exte
 nsion to support integration on Graphics Processing Units (GPUs) will be d
 iscussed.\n\nThe slides of the presentation can be found "here":http://www
 .hep.phy.cam.ac.uk/~conference/Jones_24_01_2019.pdf
LOCATION:Ryle Seminar Room no. 930\, Rutherford Building\, Cavendish Labor
 atory
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