https://www.bagnaschi.eu/tags/thdm/ Recent content in THDM on Emanuele Bagnaschi's home page Hugo -- gohugo.io en Sun, 29 Nov 2020 14:08:56 +0100 https://www.bagnaschi.eu/science/articles/vacuum_susy/ Sun, 29 Nov 2020 14:08:56 +0100 https://www.bagnaschi.eu/science/articles/vacuum_susy/ Emanuele Bagnaschi (DESY), Felix Brümmer (Montpellier U.), Wilfried Buchmüller (DESY), Alexander Voigt (DESY), Georg Weiglein (DESY) JHEP 03 (2016) 158 DOI: 10.1007/JHEP03(2016)158 e-print: 1512.07761 [hep-ph] We investigate the stability of the electroweak vacuum for two-Higgs-doublet models with a supersymmetric UV completion. The supersymmetry breaking scale is taken to be of the order of the grand unification scale. We first study the case where all superpartners decouple at this scale. We show that contrary to the Standard Model with one Higgs doublet, matching to the supersymmetric UV completion is possible if the low-scale model contains two Higgs doublets. https://www.bagnaschi.eu/science/articles/higgs_pt_resumm/ Sun, 29 Nov 2020 13:07:49 +0100 https://www.bagnaschi.eu/science/articles/higgs_pt_resumm/ Emanuele Bagnaschi (DESY), Robert V. Harlander (Bergische U., Wuppertal (main)), Hendrik Mantler(CERN and Karlsruhe U., ITP and KIT, Karlsruhe, IKP), Alessandro Vicini (INFN, Milan and Milan U.), Marius Wiesemann (Zurich U.) JHEP 01 (2016) 090 DOI: 10.1007/JHEP01(2016)090 e-print: 1510.08850 [hep-ph] We study the prediction for the Higgs transverse momentum distribution in gluon fusion and focus on the problem of matching fixed- and all-order perturbative results. The main sources of matching ambiguities on this distribution are investigated by means of a twofold comparison. https://www.bagnaschi.eu/science/articles/higgs_pt_multiscale/ Sun, 29 Nov 2020 12:38:56 +0100 https://www.bagnaschi.eu/science/articles/higgs_pt_multiscale/ Emanuele Bagnaschi (DESY) and Alessandro Vicini (INFN, Milan and Milan U.) JHEP 01 (2016) 056 DOI: 10.1007/JHEP01(2016)056 e-print: 1505.00735 [hep-ph] We consider Higgs production in gluon fusion and in particular the prediction of the Higgs transverse momentum distribution. We discuss the ambiguities affecting the matching procedure between fixed order matrix elements and the resummation to all orders of the terms enhanced by $\log(p_{T}^{H}/m_{H}​)$ factors. Following a recent proposal, we argue that the gluon fusion process, computed considering two active quark flavors, is a multiscale problem from the point of view of the resummation of the collinear singular terms.