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On the NLO QCD Corrections to Gluon-Initiated ZH Production
/ Degrassi, Giuseppe (CERN ; Rome III U. ; INFN, Rome3) ; Gröber, Ramona (Padua U. ; INFN, Padua) ; Vitti, Marco (Rome III U. ; INFN, Rome3) ; Zhao, Xiaoran (Rome III U. ; INFN, Rome3)
We compute the QCD corrections at next-to-leading order for the process $gg \rightarrow ZH$, including both the virtual two-loop terms and real-emission contributions. The two-loop box diagrams in the virtual corrections are approximated analytically over the complete phase space, combining the results of an expansion in the limit of small transverse momentum and an expansion in the regime of high energy. [...]
arXiv:2205.02769; CERN-TH-2022-079.-
2022-08-01 - 19 p.
- Published in : JHEP 2208 (2022) 009
Fulltext: 2205.02769 - PDF; document - PDF;
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Higgs-mass predictions in the MSSM and beyond
/ Slavich, P. (ed.) (Paris, LPTHE) ; Heinemeyer, S. (ed.) (Madrid, Autonoma U. ; Cantabria Inst. of Phys.) ; Bagnaschi, E. (PSI, Villigen) ; Bahl, H. (DESY) ; Goodsell, M. (Paris, LPTHE) ; Haber, H.E. (UC, Santa Cruz, Inst. Part. Phys.) ; Hahn, T. (Munich, Max Planck Inst.) ; Harlander, R. (Aachen, Tech. Hochsch.) ; Hollik, W. (Munich, Max Planck Inst.) ; Lee, G. (Korea U. ; Cornell U., LEPP ; Toronto U.) et al.
Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions of the Standard Model, where they play a crucial role in constraining the parameter space. The discovery of a Higgs boson and the remarkably precise measurement of its mass at the LHC have spurred new efforts aimed at improving the accuracy of the theoretical predictions for the Higgs masses in supersymmetric models. [...]
arXiv:2012.15629; DESY 20-229; DESY-20-229; IFT-UAM/CSIC-20-184; FR-PHENO-2020-021; KA-TP-23-2020; MPP-2020-235; KA-TP-23-2020,
MPP-2020-235; P3H-20-086; TTK-20-53; FERMILAB-PUB-21-575-T.-
2021-05-25 - 71 p.
- Published in : Eur. Phys. J. C 81 (2021) 450
Article from SCOAP3: PDF; Fulltext: fermilab-pub-21-575-t - PDF; 2012.15629 - PDF; External link: Fermilab Library Server
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Investigating the near-criticality of the Higgs boson
/ Buttazzo, Dario (CERN ; Pisa, Scuola Normale Superiore ; INFN, Pisa) ; Degrassi, Giuseppe (INFN, Rome3 ; Rome III U.) ; Giardino, Pier Paolo (Pisa U. ; CERN ; INFN, Pisa) ; Giudice, Gian F. (CERN) ; Sala, Filippo (Pisa, Scuola Normale Superiore ; INFN, Pisa ; LBNL, Berkeley) ; Salvio, Alberto (Pisa, Scuola Normale Superiore ; INFN, Pisa ; Madrid, Autonoma U. ; Madrid, IFT) ; Strumia, Alessandro (Pisa U. ; INFN, Pisa)
We extract from data the parameters of the Higgs potential, the top Yukawa coupling and the electroweak gauge couplings with full 2-loop NNLO precision, and we extrapolate the SM parameters up to large energies with full 3-loop NNLO RGE precision. Then we study the phase diagram of the Standard Model in terms of high-energy parameters, finding that the measured Higgs mass roughly corresponds to the minimum values of the Higgs quartic and top Yukawa and the maximum value of the gauge couplings allowed by vacuum metastability. [...]
arXiv:1307.3536; CERN-PH-TH-2013-166; FTUAM-13-20; IFT-UAM-CSIC-13-081; IFUP-TH; CERN-PH-TH-2013-166; FTUAM-13-20; IFT-UAM-CSIC-13-081.-
2013 - 49 p.
- Published in : JHEP 12 (2013) 089
Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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ebook
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Higgs mass and vacuum stability in the Standard Model at NNLO
/ Degrassi, Giuseppe (INFN, Rome3) ; Di Vita, Stefano (INFN, Rome3) ; Elias-Miró, Joan (Barcelona, IFAE) ; Espinosa, José R (Barcelona, IFAE ; ICREA, Barcelona) ; Giudice, Gian F (CERN) ; Isidori, Gino (CERN ; LNF, Dafne Light) ; Strumia, Alessandro (INFN, Pisa ; NICPB, Tallinn)
We present the first complete next-to-next-to-leading order analysis of the Standard Model Higgs potential. We computed the two-loop QCD and Yukawa corrections to the relation between the Higgs quartic coupling (lambda) and the Higgs mass (Mh), reducing the theoretical uncertainty in the determination of the critical value of Mh for vacuum stability to 1 GeV. [...]
arXiv:1205.6497; CERN-PH-TH-2012-134; RM3-TH-12-9.-
2012 - 35 p.
- Published in : JHEP 08 (2012) 098
Springer Open Access article: PDF; External link: Preprint
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ebook
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Flavor Changing Fermion-Graviton Vertices
/ Degrassi, G. (INFN, Rome ; CERN) ; Gabrielli, E. (CERN) ; Trentadue, L. (Parma U. ; INFN, Parma)
We study the flavor-changing quark-graviton vertex that is induced at the one-loop level when gravitational interactions are coupled to the Standard Model. Due to the conservation of the energy-momentum tensor the corresponding form factors turn out to be finite and gauge-invariant. [...]
arXiv:0812.3262; CERN-PH-TH-2008-246; RM3-TH-08-22; CERN-PH-TH-2008-246.-
Geneva : CERN, 2009 - 20 p.
- Published in : Phys. Rev. D 79 (2009) 053004
APS Published version, local copy: PDF; Fulltext: PDF; External link: Preprint
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On the NLO QCD corrections to Higgs production and decay in the MSSM
/ Degrassi, G. (CERN ; Rome III U. ; INFN, Rome3) ; Slavich, P. (CERN ; Annecy, LAPTH)
We present explicit analytic results for the two-loop top/stop/gluino contributions to the cross section for Higgs boson production via gluon fusion in the MSSM, under the approximation of neglecting the Higgs boson mass with respect to the masses of the particles circulating in the loops. The results are obtained employing the low-energy theorem for Higgs interactions adapted to the case of particle mixing. [...]
arXiv:0806.1495; CERN-PH-TH-2008-124; RM3-TH-08-12; LAPTH-1254-08; CERN-PH-TH-2008-124; LAPTH-1254-08; RM3-TH-2008-12.-
Geneva : CERN, 2008 - 23 p.
- Published in : Nucl. Phys. B 805 (2008) 267-286
Fulltext: PDF; External link: Fulltext
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SusyBSG: a code for BR[$B \to X_s \gamma$] in the MSSM with Minimal Flavor Violation
/ Degrassi, G. (CERN ; Rome III U. ; INFN, Rome3) ; Gambino, P. (Turin U. ; INFN, Turin) ; Slavich, P. (CERN ; Annecy, LAPTH)
We present the fortran code SusyBSG version 1.0, which computes the branching ratio for the decay B -> Xs gamma in the MSSM with Minimal Flavor Violation. The computation takes into account all the available NLO contributions, including the complete supersymmetric QCD corrections to the Wilson coefficients of the magnetic and chromomagnetic operators..
arXiv:0712.3265; RM3-TH-07-19; DFTT-28-2007; LAPTH-1225-07; CERN-PH-TH-2007-265; RM3-TH-07-19; DFTT-28-2007; LAPTH-1225-07; CERN-PH-TH-2007-265.-
Geneva : CERN, 2008 - 26 p.
- Published in : AIP Conf. Proc.: 1078 (2008) , pp. 345-347
Fulltext: PDF; External link: Preprint
In : 16th International Conference on Supersymmetry and the Unification of Fundamental Interactions, Seoul, Korea, 16 - 21 Jun 2008, pp.345-347
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