https://www.bagnaschi.eu/science/articles/ Recent content in Articles on Emanuele Bagnaschi's home page Hugo -- gohugo.io en Wed, 19 Aug 2020 23:04:58 +0200 https://www.bagnaschi.eu/science/articles/mw_pdf/ Sun, 29 Nov 2020 15:50:06 +0100 https://www.bagnaschi.eu/science/articles/mw_pdf/ Emanuele Bagnaschi (PSI), Alessandro Vicini (CERN and INFN Milan) e-Print: 1910.04726 [hep-ph] We discuss the determination of electroweak parameters from hadron collider observables, focusing on the W boson mass measurement. We revise the procedures adopted in the literature to include in the experimental analysis the uncertainty due to our imperfect knowledge of the proton structure. We show how the treatment of the proton parton density functions (PDFs) uncertainty as a source of systematic error, leads to the automatic inclusion in the fit of the bin-bin correlation of the kinematic distributions with respect to PDF variations. 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/ll_dmsm_vec/ Sun, 29 Nov 2020 15:44:43 +0100 https://www.bagnaschi.eu/science/articles/ll_dmsm_vec/ E. Bagnaschi (PSI, Villigen and DESY), J.C. Costa (Imperial Coll., London), K. Sakurai (Warsaw U.), M. Borsato (Heidelberg U.), O. Buchmueller (Imperial Coll., London), A. Roeck (CERN and Antwerp U.), M.J. Dolan (Melbourne U.), J.R. Ellis (King’s Coll. London and NICPB, Tallinn and CERN), H. Flächer (Bristol U.), K. Hahn (Northwestern U.), S. Heinemeyer (Madrid, IFT and Cantabria Inst. of Phys.), M. Lucio (Santiago de Compostela U., IGFAE), D.Martínez Santos (Santiago de Compostela U. https://www.bagnaschi.eu/science/articles/mh_susy/ Sun, 29 Nov 2020 15:41:03 +0100 https://www.bagnaschi.eu/science/articles/mh_susy/ E. Bagnaschi (PSI, Villigen), H. Bahl (Munich, Max Planck Inst.), J. Ellis (King’s Coll. London and NICPB, Tallinn and CERN), J. Evans (Korea Inst. Advanced Study, Seoul), T. Hahn (Munich, Max Planck Inst.), S. Heinemeyer (Madrid, IFT and Cantabria Inst. of Phys.), W. Hollik (Munich, Max Planck Inst.), K.A. Olive (Minnesota U., Theor. Phys. Inst.), S. Paßehr (Paris, LPTHE), H. Rzehak (Southern Denmark U., CP3-Origins), I.V. Sobolev (DESY), G. Weiglein (DESY), J. 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/bottom_wmass/ Sun, 29 Nov 2020 15:22:23 +0100 https://www.bagnaschi.eu/science/articles/bottom_wmass/ Emanuele Bagnaschi (DESY), Fabio Maltoni (Louvain U., CP3), Alessandro Vicini (Milan U. and INFN, Milan), Marco Zaro (NIKHEF, Amsterdam and Paris, LPTHE) JHEP 07 (2018) 101 DOI: 10.1007/JHEP07(2018)101 e-Print: 1803.04336 [hep-ph] We perform a study of lepton-pair production in association with bottom quarks at the LHC based on the predictions obtained at next-to-leading order in QCD, both at fixed order and matched with a QCD parton shower. We consider a comprehensive set of observables and estimate the associated theoretical uncertainties by studying the dependence on the perturbative QCD scales (renormalisation, factorisation and shower) and by comparing different parton-shower models (${\tt Pythia8}$ and ${\tt Herwig++}$) and matching schemes (${\tt MC@NLO}$ and ${\tt POWHEG}$). https://www.bagnaschi.eu/science/articles/udocker/ Sun, 29 Nov 2020 15:14:31 +0100 https://www.bagnaschi.eu/science/articles/udocker/ Jorge Gomes (LIP, Lisbon), Emanuele Bagnaschi (DESY), Isabel Campos (Cantabria Inst. of Phys.), Mario David (LIP, Lisbon), Luís Alves (LIP, Lisbon), João Martins (LIP, Lisbon), João Pina (LIP, Lisbon), Alvaro López-García (Cantabria Inst. of Phys.), Pablo Orviz (Cantabria Inst. of Phys.) Comput.Phys.Commun. 232 (2018) 84-97 DOI: 10.1016/j.cpc.2018.05.021 e-print: 1711.01758 [cs.SE] Containers are increasingly used as means to distribute and run Linux services and applications. In this paper we describe the architectural design and implementation of ${\tt udocker}$, a tool which enables the user to execute Linux containers in user mode. https://www.bagnaschi.eu/science/articles/ll_subgutcmssm/ Sun, 29 Nov 2020 15:08:57 +0100 https://www.bagnaschi.eu/science/articles/ll_subgutcmssm/ J.C. Costa (Imperial Coll., London), E. Bagnaschi (DESY), K. Sakurai (Warsaw U.), M. Borsato (U. Santiago de Compostela (main)), O. Buchmueller (Imperial Coll., London), M. Citron (Imperial Coll., London), A. De Roeck (CERN and Antwerp U.), M.J. Dolan (Melbourne U.), J.R. Ellis (King’s Coll. London and NICPB, Tallinn and CERN), H. Flächer (Bristol U.), S. Heinemeyer (Cantabria U., Santander and Madrid, Autonoma U. and Madrid, IFT), M. Lucio (Santiago de Compostela U. https://www.bagnaschi.eu/science/articles/ll_pmssm11/ Sun, 29 Nov 2020 15:03:28 +0100 https://www.bagnaschi.eu/science/articles/ll_pmssm11/ E. Bagnaschi (DESY), K. Sakurai (Warsaw U.), M. Borsato (U. Santiago de Compostela), O. Buchmueller (Imperial Coll., London), M. Citron (Imperial Coll., London), J.C. Costa (Imperial Coll., London), A. De Roeck (CERN and Antwerp U.), M.J. Dolan (Melbourne U.), J.R. Ellis (King’s Coll. London and CERN and NICPB, Tallinn), H. Flächer (Bristol U.), S. Heinemeyer (Cantabria U., Santander and Madrid, Autonoma U. and Madrid, IFT), M. Lucio (Santiago de Compostela U. 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/ll_amsb/ Sun, 29 Nov 2020 14:41:34 +0100 https://www.bagnaschi.eu/science/articles/ll_amsb/ E. Bagnaschi (DESY), M. Borsato (Santiago de Compostela U.), K. Sakurai (Durham U., Dept. of Math. and Durham U., IPPP and Warsaw U.), O. Buchmueller (Imperial Coll., London), R. Cavanaugh (Fermilab and Illinois U., Chicago), V. Chobanova (Santiago de Compostela U.), M. Citron (Imperial Coll., London), J.C. Costa (Imperial Coll., London), A. De Roeck (CERN and Antwerp U.), M.J. Dolan (Melbourne U.), J.R. Ellis (King’s Coll. London and CERN), H. Flächer (Bristol U. https://www.bagnaschi.eu/science/articles/ll_su5/ Sun, 29 Nov 2020 14:25:39 +0100 https://www.bagnaschi.eu/science/articles/ll_su5/ E. Bagnaschi (DESY), J.C. Costa (Imperial Coll., London), K. Sakurai (Durham U., IPPP and Warsaw U.), M. Borsato (Santiago de Compostela U.), O. Buchmueller (Imperial Coll., London), R. Cavanaugh (Fermilab and Illinois U., Chicago), V. Chobanova (Santiago de Compostela U.), M. Citron (Imperial Coll., London), A. De Roeck (CERN and Antwerp U.), M.J. Dolan (Melbourne U.), J.R. Ellis (King’s Coll. London), H. Flächer (Bristol U.), S. Heinemeyer (Cantabria Inst. of Phys. 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/mc_dm/ Sun, 29 Nov 2020 12:43:12 +0100 https://www.bagnaschi.eu/science/articles/mc_dm/ E.A. Bagnaschi (DESY), O. Buchmueller (Imperial Coll., London), R. Cavanaugh (Fermilab and Illinois U., Chicago), M. Citron (Imperial Coll., London), A. De Roeck (CERN and Antwerp U.), M.J. Dolan (SLAC and Melbourne U.), J.R. Ellis (King’s Coll. London and CERN), H. Flächer (Bristol U.), S. Heinemeyer (Cantabria Inst. of Phys.), G. Isidori (Zurich U.), S. Malik (Imperial Coll., London), D. Martínez Santos (Santiago de Compostela U.), K.A. Olive (Minnesota U.), K. 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/ll_pmssm10/ Sun, 23 Aug 2020 20:16:02 +0200 https://www.bagnaschi.eu/science/articles/ll_pmssm10/ K.J. de Vries (Imperial Coll., London), E.A. Bagnaschi (DESY), O. Buchmueller (Imperial Coll., London), R. Cavanaugh (Fermilab and Illinois U., Chicago), M. Citron (Imperial Coll., London), A. De Roeck (CERN and Antwerp U.), M.J. Dolan (SLAC and Melbourne U.), J.R. Ellis (King’s Coll. London and CERN), H. Flächer (Bristol U.), S. Heinemeyer (Cantabria Inst. of Phys.), G. Isidori (Zurich U.), S. Malik (Imperial Coll., London), J. Marrouche (CERN), D. Martinez Santos (NIKHEF, Amsterdam and Santiago de Compostela U. https://www.bagnaschi.eu/science/articles/mhous/ Sun, 23 Aug 2020 20:06:59 +0200 https://www.bagnaschi.eu/science/articles/mhous/ Emanuele Bagnaschi (Diderot U., Paris and Paris, LPTHE and DESY), Matteo Cacciari (Diderot U., Paris and Paris, LPTHE), Alberto Guffanti (Bohr Inst.), Laura Jenniches (Bohr Inst. and Wurzburg U.) JHEP 02 (2015) 133 DOI: 10.1007/JHEP02(2015)133 e-print: arXiv: 1409.5036 [hep-ph] We consider two approaches to estimate and characterise the theoretical uncertainties stemming from the missing higher orders in perturbative calculations in Quantum Chromodynamics: the traditional one based on renormalisation and factorisation scale variation, and the Bayesian framework proposed by Cacciari and Houdeau. 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.