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2019:groups:higgs:massuncert [2019/06/12 10:02]
stephen.jones
2019:groups:higgs:massuncert [2019/06/14 12:02] (current)
joey.huston
Line 3: Line 3:
 **Project Description** **Project Description**
  
-Study of top-quark mass scheme uncertainties (MSbar/OS) in Higgs processes.+Study of top-quark mass scheme uncertainties (MSbar/OS) in Higgs processes:
   * HH (LO/NLO)   * HH (LO/NLO)
   * HJ (LO/NLO asymptotic expansion)   * HJ (LO/NLO asymptotic expansion)
-  * HZ vs ZZ (LO)+  * ggHZ vs ggZZ (LO)
   * H* (LO/NLO)   * H* (LO/NLO)
  
-How are these various processes affected by the mass scheme uncertainty?​ Can we say anything about what is a sensible (or not sensible) choice of scheme/​choice. ​Should we be treating masses running in the loops differently from those entering the Yukawa couplings?+Open Questions:​ 
 +  * How are these various processes affected by the mass scheme uncertainty?​ 
 +  * To what extent is this problem coming from "​Triangle-type"​ topologies vs "​Box-type"​ topologies? (See for example expanded result of Steinhauser et al.) 
 +  * Can we say anything about what is a sensible (or not sensible) choice of scheme
 +  * Should we be treating masses running in the loops differently from those entering the Yukawa couplings? 
 +  * How much of this behaviour is due to the mass dependence of the Yukawa vs. top quarks in loop? 
 +  * How large is this uncertainty in the context of the onshell/​ofshell Higgs measurements?​ 
 + 
 + 
 +** References ** 
 +  * [[https://​arxiv.org/​abs/​1811.05692| Gluon fusion into Higgs pairs at NLO QCD and the top mass scheme 
 +]] 
 +  * [[https://​indico.cern.ch/​event/​825291 |Slides (Michael Spira), 17 June]] 
 +  * [[https://​arxiv.org/​abs/​1709.01092|High-Energy Limit of QCD beyond Sudakov Approximation]] 
 +  * [[https://​arxiv.org/​abs/​1809.04950|High-Energy Limit of Mass-Suppressed Amplitudes in Gauge Theories]] 
 +  * [[https://​arxiv.org/​abs/​1811.05489|Double Higgs boson production at NLO in the high-energy limit: complete analytic results]] 
 +  * [[https://​arxiv.org/​abs/​1712.06549|Two-loop amplitudes for processes gg→Hg,​qg→Hq and qq¯→Hg at large Higgs transverse momentum]] 
  
 **Interested Participants** **Interested Participants**
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   * Stephen Jones   * Stephen Jones
   * Michael Spira   * Michael Spira
 +  * Xuan Chen
 +  * Raoul Röntsch
 +  * Joey Huston
   * ...   * ...
2019/groups/higgs/massuncert.1560326545.txt.gz · Last modified: 2019/06/12 10:02 by stephen.jones