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LHCHXSWG Official Report

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2026-04-17
11:34
NLO EW and QCD dimension-6 SMEFT results for Higgs and gauge boson decays in POPfx format / Giardino, Pier Paolo (Universidad Autónoma de Madrid) ; Bellafronte, Luigi (Florida State University) ; Dawson, Sally (Brookhaven National Laboratory) ; Del Pio, Clara (Brookhaven National Laboratory) ; Forslund, Matthew (Princeton University)
We present next-to-leading-order (NLO) QCD and electroweak (EW) results using the dimension-6 SMEFT for all 2- and 4- body Higgs decays, for $Z$ and $W$ decays along with the corresponding EW precision observables, and for the Higgstrahlung process $e^+e^-\rightarrow ZH$ at $\sqrt{s}=240$, $365$ and $500$ GeV. The results are presented in the POPfx format for ease of use in experimental and phenomenological studies. [...]
LHCHWG-2026-004.- Geneva : CERN, 2026 Fulltext: PDF;

Detaljnije
2026-03-16
14:53
Interference effects in gluon-fusion Higgs boson production / Buccioni, Federico (CERN) ; Devoto, Federica (SLAC)
In this contribution we summarize recent progress in higher-order computations of interference effects in Higgs boson production via gluon fusion. The focus is on the resonance region, where interference terms are most significant relative to the signal when the Higgs boson decay is loop-induced. [...]
LHCHWG-2026-003.- Geneva : CERN, 2026 - 12. Fulltext: PDF;

Detaljnije
2026-01-28
09:27
NMSSMScanner: Efficient Scans in the NMSSM Parameter Space -- Proof of Concept / Boto, Rafael (KIT) ; Dao, Thi Nhung (PHENIKAA University) ; Egle, Felix (DESY) ; Elyaouti, Karim (KIT) ; Gabelmann, Martin (Freiburg University) ; Mühlleitner, Margarete (KIT) ; Plotnikov, Johann (KIT)
We present the first version of the new scanning tool NMSSMScanner that allows to perform efficient scans in the complex multi-parameter space of the Next-to-Minimal Supersymmetric extension of the Standard Model (NMSSM) while taking into account all elevant constraints. As a proof of concept we apply it to the search for NMSSM parameter configurations that maximize Higgs boson pair production from resonant scalar or pseudoscalar production, in various final states..
LHCHWG-2026-002.- Geneva : CERN, 2026 - 30. v2: PDF;

Detaljnije
2026-01-23
05:18
Electroweak Higgs pair production: \\ Updated inclusive cross sections / Gröber, Ramona (U. Padua (main) ; INFN, Padua) ; Karlberg, Alexander (Oxford U., Theor. Phys. ; CERN) ; Pellen, Mathieu (Freiburg U.) ; Sacchi, Gioia (U. Padua (main)) ; Spira, Michael (PSI, Villigen)
We present updated inclusive cross sections for electroweak di-Higgs boson production for energies of relevance to the LHC and High-Luminosity phase the LHC. The cross sections are presented at N$^3$LO-QCD+NLO-EW for vector boson fusion and NNLO-QCD for associate production with a vector boson. [...]
LHCHWG-2026-001; CERN-TH-2026-007; FR-PHENO-26-02; OUTP-26-01P; COMETA-2026-02; arXiv:2603.02764.- Geneva : CERN, 2026 - 12 p. Fulltext: LHCHWG-2026-001_2 - PDF; 2603.02764 - PDF;

Detaljnije
2025-12-23
14:15
Constraining the Higgs potential using multi-Higgs production / Ding, Jia-Le (School of Physics, Shandong University, Jinan, Shandong 250100, China) ; Gillis, Zach (Department of Physics and Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA) ; Haisch, Ulrich (Max Planck Institute for Physics, Boltzmannstr.8, 85748 Garching, Germany) ; Moser, Brian (University of Freiburg (DE)) ; Li, Hao Tao (School of Physics, Shandong University, Jinan, Shandong 250100, China) ; Pagani, Davide (INFN, Sezione di Bologna, Via Irnerio 46, Bologna, I-40126, Italy) ; Rottoli, Luca (Universita & INFN, Milano-Bicocca (IT)) ; Shivaji, Ambresh (Indian Institute of Science Education and Research, Knowledge City, Sector 81, S. A. S. Nagar, Manauli PO 140306, Punjab, India) ; Si, Zong-Guo (School of Physics, Shandong University, Jinan, Shandong 250100, China) ; Wang, Jian (School of Physics, Shandong University, Jinan, Shandong 250100, China) et al.
The Higgs self-couplings remain only weakly constrained by current Large Hadron Collider (LHC) measurements, leaving ample room for physics beyond the Standard Model that could modify the structure of the Higgs potential. Multi-Higgs production processes provide a particularly sensitive probe of deviations in both the trilinear and quartic Higgs self-couplings. [...]
LHCHWG-2025-015.- Geneva : CERN, 2025 - 19. Final version: PDF; Fulltext: PDF; Version2: PDF;

Detaljnije
2025-11-14
12:27
Charged Higgs Pairs at the LHC: A NLO Analysis / Spira, Michael (Paul Scherrer Institute (CH)) ; Biermann, Lisa (Paul Scherrer Institute) ; Ita, Harald (Paul Scherrer Institute, UZH) ; Yedelkina, Yelizaveta (Paul Scherrer Institute) ; Rusetski, Irina (Paul Scherrer Institute, Bern University) ; Ahmed, Mohamed (Paul Scherrer Institute)
Charged Higgs-boson pair production at hadron colliders yields information about the trilinear couplings involving charged Higgs fields in extensions of the Standard Model (SM). We consider the two-Higgs doublet model (2HDM) extension and obtain next-to-leading order QCD predictions for the charged-Higgs pair production ($H^+H^-$ production). [...]
LHCHWG-2025-014.- Geneva : CERN, 2025 - 27. Charged Higgs Pairs at the LHC: A NLO Analysis: PDF;

Detaljnije
2025-10-22
15:57
Impact of Higgs-Boson measurements on SMEFT Fits / De Blas Mateo, Jorge (Universidad de Granada (ES)) ; Goncalves, Angelica (Florida State University (USA)) ; Miralles, Victor (University of Manchester (UK)) ; Reina, Laura (Florida State University (USA)) ; Silvestrini, Luca (Sapienza Universita e INFN, Roma I (IT)) ; Valli, Mauro (Sapienza Universita and INFN, Roma I (IT))
We present current bounds on SMEFT operators that are mainly constrained by Higgs-boson observables, under different assumptions for the flavour structure of the UV theory. We investigate how the accuracy reached through a dedicated Higgs-boson precision physics program is starting to have a major impact in setting a lower bound on the scale of new physics, and we discuss the relevance of considering the scale evolution of the SMEFT coefficients in this context. [...]
LHCHWG-2025-013.- Geneva : CERN, 2025 - 11. Contribution to Report 5 of the LHC Higgs WG: PDF;

Detaljnije
2025-09-19
13:22
State-of-the-art electroweak Higgs boson pair production in association with two jets at the LHC in the Standard Model and beyond / Braun, Jens (KIT, Karlsruhe, TP) ; Bredt, Pia (Siegen U.) ; Heinrich, Gudrun (KIT, Karlsruhe, TP) ; Höfer, Marius (KIT, Karlsruhe, TP) ; Jäger, Barbara (Tubingen U.) ; Karlberg, Alexander (CERN) ; Reinhardt, Simon (Tubingen U.)
We present a systematic comparison of two state-of-the-art tools for the simulation of Higgs-pair production via vector boson fusion (VBF) as implemented in GoSam+Whizard and the POWHEG-BOX. Cross sections and distributions are provided within the Standard Model and beyond within scenarios typical for experimental analyses and for a range of energies of relevance to the LHC and its upcoming high luminosity phase. [...]
LHCHWG-2025-012; CERN-TH-2025-170; KA-TP-27-2025; P3H-25-062; SI-HEP-2025-18; arXiv:2511.02488.- Geneva : CERN, 2025-09-19 - 21 p. Fulltext: PDF; v2 following comments 20/10/2025: PDF;

Detaljnije
2025-09-09
12:15
Modelling $b\bar{b}H$ production for the LHC at 13.6 TeV / Biello, Christian (Garching, Max Planck Inst., MPE) ; Gavardi, Alessandro (DESY) ; von Kuk, Rebecca (DESY) ; Lim, Matthew A. (Sussex U. ; Milan Bicocca U. (main) ; INFN, Milan Bicocca) ; Manzoni, Stefano (CERN) ; Mazzeo, Elena (CERN) ; Mazzitelli, Javier (PSI, Villigen) ; Sankar, Aparna (Garching, Max Planck Inst., MPE ; Munich, Tech. U.) ; Spira, Michael (PSI, Villigen) ; Tackmann, Frank J. (DESY) et al.
We present new state-of-the-art predictions for Standard Model Higgs boson production in association with a bottom-quark pair ($b\bar bH$). Updated cross sections are computed in accordance with the recommendations of the LHC Higgs Working Group, including the use of the PDF4LHC21 set of parton distribution functions, with a center-of-mass energy of 13.6 TeV. [...]
arXiv:2510.18815; LHCHWG-2025-11; MPP-2025-116; DESY-25-093; TIF-UNIMI-2025-15.- Geneva : CERN, 2026-02-04 - 46 p. - Published in : 10.21468/SciPostPhysCommRep.18 Fulltext: 2510.18815 - PDF; document - PDF; bbH contribution to Report 5: PDF;

Detaljnije
2025-08-26
00:32
The inclusive Higgs boson cross-section in gluon-gluon fusion in soft-virtual approximation at fourth order in QCD / Das, Goutam (RWTH Aachen University) ; Moch, Sven-Olaf (Hamburg University (DE))
We present precise results for the inclusive Higgs boson cross-section in gluon-gluon fusion at the LHC considering state-of-the-art fourth-order results in perturbative QCD arising from the dominant soft and virtual gluon emissions. Utilizing four-loop QCD results for the gluon-form factor, the splitting function and related anomalous dimen- sions, we study the effects of threshold enhanced soft gluon emissions and estimate their impact on the total cross-section at the fourth order. [...]
LHCHWG-2025-010.- Geneva : CERN, 2025 - 8. Fulltext: PDF;

Detaljnije