https://www.bagnaschi.eu/tags/mssm/ Recent content in MSSM on Emanuele Bagnaschi's home page Hugo -- gohugo.io en Sun, 29 Nov 2020 15:48:20 +0100 https://www.bagnaschi.eu/science/articles/mh_2l_qcd/ Sun, 29 Nov 2020 15:48:20 +0100 https://www.bagnaschi.eu/science/articles/mh_2l_qcd/ Emanuele Bagnaschi (PSI, Villigen), Giuseppe Degrassi (INFN, Rome and Rome U.), Sebastian Paßehr (Paris, LPTHE), Pietro Slavich (Paris, LPTHE) Eur.Phys.J.C 79 (2019) 11, 910 DOI: 10.1140/epjc/s10052-019-7417-9 e-print: 1908.01670 [hep-ph] We improve the determination of the Higgs-boson mass in the MSSM with heavy superpartners, by computing the two-loop threshold corrections to the quartic Higgs coupling that involve both the strong and the electroweak gauge couplings. Combined with earlier results, this completes the calculation of the two-loop QCD corrections to the quartic coupling at the SUSY scale. https://www.bagnaschi.eu/science/articles/mssm_scenarios/ Sun, 29 Nov 2020 15:25:11 +0100 https://www.bagnaschi.eu/science/articles/mssm_scenarios/ Emanuele Bagnaschi (PSI, Villigen), Henning Bahl (Munich, Max Planck Inst.), Elina Fuchs (Weizmann Inst.), Thomas Hahn (Munich, Max Planck Inst.), Sven Heinemeyer (Cantabria Inst. of Phys. and Madrid, IFT and U. Autonoma, Madrid (main)), Stefan Liebler (KIT, Karlsruhe, TP), Shruti Patel (KIT, Karlsruhe, TP and KIT, Karlsruhe, IKP), Pietro Slavich (Paris, LPTHE), Tim Stefaniak (DESY), Carlos E.M. Wagner (Argonne and Chicago U., EFI and Chicago U., KICP), Georg Weiglein (DESY) https://www.bagnaschi.eu/science/articles/mh_improved/ Sun, 29 Nov 2020 15:01:15 +0100 https://www.bagnaschi.eu/science/articles/mh_improved/ Emanuele Bagnaschi (DESY), Javier Pardo Vega (ICTP, Trieste and INFN, Trieste and SISSA, Trieste), Pietro Slavich (Paris, LPTHE and UPMC, Paris (main)) Eur.Phys.J.C 77 (2017) 5, 334 DOI: 10.1140/epjc/s10052-017-4885-7 e-Print: 1703.08166 [hep-ph] We present several advances in the effective field theory calculation of the Higgs mass in MSSM scenarios with heavy superparticles. In particular, we compute the dominant two-loop threshold corrections to the quartic Higgs coupling for generic values of the relevant SUSY-breaking parameters, including all contributions controlled by the strong gauge coupling and by the third-family Yukawa couplings. 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_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. https://www.bagnaschi.eu/science/articles/higgs_mass_unnatural_susy/ Sun, 23 Aug 2020 19:59:57 +0200 https://www.bagnaschi.eu/science/articles/higgs_mass_unnatural_susy/ Emanuele Bagnaschi (UPMC, Paris (main) and Paris, LPTHE), Gian F. Giudice (CERN), Pietro Slavich (UPMC, Paris (main) and Paris, LPTHE), Alessandro Strumia (Pisa U. and INFN, Pisa and NICPB, Tallinn) JHEP 09 (2014) 092 DOI: 10.1007/JHEP09(2014)092 e-Print: arXiv:1407.4081 [hep-ph] Assuming that supersymmetry exists well above the weak scale, we derive the full one-loop matching conditions between the SM and the supersymmetric theory, allowing for the possibility of an intermediate Split-SUSY scale. https://www.bagnaschi.eu/science/articles/towards_mssm/ Sun, 23 Aug 2020 19:54:35 +0200 https://www.bagnaschi.eu/science/articles/towards_mssm/ E. Bagnaschi (UPMC, Paris (main) and Paris, LPTHE), R.V. Harlander (Wuppertal U.), S. Liebler(U. Hamburg (main)), H. Mantler (CERN), P. Slavich(UPMC, Paris (main) and Paris, LPTHE), A. Vicini(Milan U. and INFN, Milan) JHEP 06 (2014) 167 DOI: 10.1007/JHEP06(2014)167 e-Print: arXiv:1404.0327 [hep-ph] We study the production of scalar and pseudoscalar Higgs bosons via gluon fusion and bottom-quark annihilation in the MSSM. Relying on the NNLO-QCD calculation implemented in the public code SusHi, we provide precise predictions for the Higgs-production cross section in six benchmark scenarios compatible with the LHC searches. https://www.bagnaschi.eu/science/articles/gghnlopowheg/ Wed, 19 Aug 2020 23:19:05 +0200 https://www.bagnaschi.eu/science/articles/gghnlopowheg/ E. Bagnaschi (Milan U. & INFN, Milan & Paris, LPTHE) , G. Degrassi (INFN, Rome3 & Rome III U.) , P. Slavich (Paris, LPTHE) , A. Vicini (Milan U. & INFN, Milan) JHEP 1202 (2012) 088 DOI: 10.1007/JHEP02(2012)088 e-Print: arXiv:1111.2854 [hep-ph] We consider the gluon fusion production cross section of a scalar Higgs boson at NLO QCD in the SM and in the MSSM. We implement the calculation in the POWHEG approach, and match the NLO-QCD results with the PYTHIA and HERWIG QCD parton showers.