Open accessJournal Article

# g g → H H : Combined uncertainties

02 Mar 2021-Physical Review D (American Physical Society)-Vol. 103, Iss: 5, pp 056002
Abstract: In this paper we discuss the combination of the usual renormalization and factorization scale uncertainties of Higgs-pair production via gluon fusion with the novel uncertainties originating from the scheme and scale choice of the virtual top mass. Moreover, we address the uncertainties related to the top-mass definition for different values of the trilinear Higgs coupling and their combination with the other uncertainties.

##### Citations
More

9 results found

Open accessJournal Article
Gudrun Heinrich1Institutions (1)
03 Aug 2021-Physics Reports
Abstract: The precision frontier in collider physics is being pushed at impressive speed, from both the experimental and the theoretical side. The aim of this review is to give an overview of recent developments in precision calculations within the Standard Model of particle physics, in particular in the Higgs sector. While the first part focuses on phenomenological results, the second part reviews some of the techniques which allowed the rapid progress in the field of precision calculations. The focus is on analytic and semi-numerical techniques for multi-loop amplitudes, however fully numerical methods as well as subtraction schemes for infrared divergent real radiation beyond NLO are also briefly described.

Topics: Higgs sector (50%)

44 Citations

Open accessJournal Article
Abstract: We compute the NLO virtual corrections to the partonic cross section of $gg\to HH$, in the high energy limit. Finite Higgs boson mass effects are taken into account via an expansion which is shown to converge quickly. We obtain analytic results for the next-to-leading order form factors which can be used to compute the cross section. The method used for the calculation of the (non-planar) master integrals is described in detail and explicit results are presented.

Topics: Higgs boson (57%), Limit (mathematics) (54%),

27 Citations

Open accessJournal Article
Gudrun Heinrich1Institutions (1)
Abstract: The precision frontier in collider physics is being pushed at impressive speed, from both the experimental and the theoretical side. The aim of this review is to give an overview of recent developments in precision calculations within the Standard Model of particle physics, in particular in the Higgs sector. While the first part focuses on phenomenological results, the second part reviews some of the techniques which allowed the rapid progress in the field of precision calculations. The focus is on analytic and semi-numerical techniques for multi-loop amplitudes, however fully numerical methods as well as subtraction schemes for infrared divergent real radiation beyond NLO are also briefly described.

Topics: Higgs sector (50%)

13 Citations

Open accessJournal Article
M.M. Almarashi1Institutions (1)
01 Oct 2021-Results in physics
Abstract: We study the production of the next-to-lightest CP-even Higgs state, which is not the SM-like Higgs, of the NMSSM in association with a single bottom quark b g → b h 2 in the ditau decay channel at the LHC. We find that this production channel can be exploited to extract such a Higgs boson at the LHC with an integrated luminosity of 3000 fb−1. The presence of a single bottom quark in the final state with a high transverse momentum is useful to suppress the backgrounds to a manageable level.

1 Citations

Open accessJournal Article
Abstract: We combine NLO predictions with full top-quark mass dependence with approximate NNLO predictions for Higgs-boson pair production in gluon fusion, including the possibility to vary coupling parameters within a non-linear Effective Field Theory framework containing five anomalous couplings for this process. We study the impact of the anomalous couplings on various observables, and present Higgs-pair invariant-mass distributions at seven benchmark points characterising different mhh shape types. We also provide numerical coefficients for the approximate NNLO cross section as a function of the anomalous couplings at $$\sqrt{s}$$ = 14 TeV.

Topics: Pair production (51%), , Higgs boson (50%)

##### References
More

37 results found

Open accessJournal Article
Abstract: We provide an updated recommendation for the usage of sets of parton distribution functions (PDFs) and the assessment of PDF and PDF+$\alpha_s$ uncertainties suitable for applications at the LHC Run II. We review developments since the previous PDF4LHC recommendation, and discuss and compare the new generation of PDFs, which include substantial information from experimental data from the Run I of the LHC. We then propose a new prescription for the combination of a suitable subset of the available PDF sets, which is presented in terms of a single combined PDF set. We finally discuss tools which allow for the delivery of this combined set in terms of optimized sets of Hessian eigenvectors or Monte Carlo replicas, and their usage, and provide some examples of their application to LHC phenomenology.

820 Citations

Open accessJournal Article
Abstract: We provide an updated recommendation for the usage of sets of parton distribution functions (PDFs) and the assessment of PDF and PDF+$\alpha_s$ uncertainties suitable for applications at the LHC Run II. We review developments since the previous PDF4LHC recommendation, and discuss and compare the new generation of PDFs, which include substantial information from experimental data from the Run I of the LHC. We then propose a new prescription for the combination of a suitable subset of the available PDF sets, which is presented in terms of a single combined PDF set. We finally discuss tools which allow for the delivery of this combined set in terms of optimized sets of Hessian eigenvectors or Monte Carlo replicas, and their usage, and provide some examples of their application to LHC phenomenology.

594 Citations

Open accessJournal Article
11 Nov 1996-Nuclear Physics
Abstract: Pair production processes of neutral Higgs particles will allow us to study the trilinear Higgs couplings at future high-energy colliders. Several mechanisms give rise to multi-Higgs final states in hadron interactions. In the present paper we investigate Higgs pair production in gluon-gluon collisions. After recapitulating pair production in the Standard Model, the analysis of the cross sections is carried out in detail for the neutral Higgs particles in the minimal supersymmetric extension.

Topics: Higgs field (67%), Higgs boson (60%), Standard Model (59%) ... show more

362 Citations

Open accessJournal Article
Abstract: Now that the Higgs boson has been observed by the ATLAS and CMS experiments at the LHC, the next important step would be to measure accurately its properties to establish the details of the electroweak symmetry breaking mechanism. Among the measurements which need to be performed, the determination of the Higgs self-coupling in processes where the Higgs boson is produced in pairs is of utmost importance. In this paper, we discuss the various processes which allow for the measurement of the trilinear Higgs coupling: double Higgs production in gluon fusion, vector boson fusion, double Higgs-strahlung and associated production with a top quark pair. We first evaluate the production cross sections for these processes at the LHC with center-of-mass energies ranging from the present $\sqrt{s}=8$ TeV to $\sqrt{s}=100$ TeV, and discuss their sensitivity to the trilinear Higgs coupling. We include the various higher order QCD radiative corrections, at next-to-leading order for gluon and vector boson fusion and at next-to-next-to-leading order for associated double Higgs production with a gauge boson. The theoretical uncertainties on these cross sections are estimated. Finally, we discuss the various channels which could allow for the detection of the double Higgs production signal at the LHC and estimate their potential to probe the trilinear Higgs coupling.

Topics: Higgs field (71%), Higgs mechanism (64%), Higgs boson (63%) ... show more

345 Citations

Open accessJournal Article
Abstract: We present the results of analytic calculation of the quark mass anomalous dimension to alpha_s**4.

Topics: Quark (55%)

343 Citations

##### Performance
###### Metrics
No. of citations received by the Paper in previous years
YearCitations
20217
20201
20181