Inclusive Higgs measurements at the LHC have limited resolution on the gluon fusion loops, being unable to distinguish the long-distance contributions mediated by the top quark from possible short-distance new physics effects. Using an Effective Field Theory (EFT) approach we compare several proposed methods to lift this degeneracy, including tt¯ h and boosted, off-shell and double Higgs production, and perform detailed projections to the High-Luminosity LHC and a future hadron collider. In addition, we revisit off-shell Higgs production. Firstly, we point out its sensitivity to modifications of the top-Z couplings, and by means of a general analysis we show that the reach is comparable to that of tree-level processes such as tt¯ Z production. Implications for composite Higgs models are also discussed. Secondly, we assess the regime of validity of the EFT, performing an explicit comparison for a simple extension of the Standard Model containing one vector-like quark. © 2016, The Author(s).
|Titolo:||Resolving gluon fusion loops at current and future hadron colliders|
|Autori:||Azatov, A.; Grojean, C.; Paul, A.; Salvioni, E.|
|Rivista:||JOURNAL OF HIGH ENERGY PHYSICS|
|Data di pubblicazione:||2016|
|Digital Object Identifier (DOI):||10.1007/JHEP09(2016)123|
|Fulltext via DOI:||10.1007/JHEP09(2016)123|
|Appare nelle tipologie:||1.1 Journal article|