Total Branching Ratio Research Articles

Forward and reverse uncertainty analyses for RRKM/master equation based kinetic predictions: A case study of ethyl with oxygen

AbstractIn the realm of combustion kinetic modeling, the norm involves employing thousands of reactions to delineate the chemical conversion of hundreds of species. Notably, theoretically predicted rate coefficients and branching ratios, derived through the RRKM/master equation (ME) model, play an increasing role in kinetic modeling. Thus minimizing the uncertainty of theoretical prediction across wide working conditions is crucial to refine a kinetic model. The present study takes ethyl (C2H5) + oxygen (O2) reaction system to show that combined forward and reverse uncertainty analysis can be used to further constrain calculated rate coefficients and branching ratios, which were already calculated by high‐level quantum chemistry methods. Forward global uncertainty analysis with the artificial neural network‐high dimensional model representation (ANN‐HDMR) method is employed to select key parameters affecting total rate coefficients of C2H5 + O2 and branching ratios of C2H5 + O2 = C2H4 + HO2 (C1). Reverse uncertainty analysis with Bayesian method was then applied to refine the key input parameters based on experimental data at working conditions selected by sensitivity entropy. Although the target RRKM/ME model system was built on high level theoretical calculations, the combined forward and reverse uncertainty analyses are still able to reduce uncertainties of predicted total rate coefficients of C2H5 + O2 and branching ratios for C1 across a wide range of working conditions. Specifically, the uncertainties of total rate coefficient and C1 branching ratio have been reduced from 1.46 and 1.52 to 1.30 and 1.36 at 298 K and 1 Torr. The analysis process proposed in the present work effectively extrapolates the constraint ability of accurate measured data at one condition to wide working conditions based on the RRKM/ME model.

Broadband near infrared emission of Er3+ ions doped fluorophosphate glasses for solid state laser applications

A series of glass compositions (P2O5 + Bi2O3 + Na2CO3 + SrF2 + xEr2O3) with different concentrations of erbium ions (Er3+) was synthesized using the melt quenching method and the samples were subjected to thorough characterization to explore their optical and structural properties. In order to ascertain the amorphous nature of the glass and acquire a deeper understanding of its chemical bonding, conventional methods of characterization, such as X-ray diffraction and Fourier transform infrared spectroscopy, were utilized. The Judd-Ofelt intensity parameters were computed using the absorption spectra of glasses doped with Er3+, providing vital information about the local environment and coordination of Er3+ ions in the glass matrix. Using the Judd-Ofelt intensity parameters and emission spectra to calculate the radiative parameters like total radiative transition probability (AT), radiative lifetime (τR) and radiative branching ratios for 4I13/2 → 4I15/2 transition. The McCumber theory is used to study absorption and emission cross-section for 4I13/2 → 4I15/2 transition. Prepared the PBNSEr05 glass sample suitable candidates for 1.53 μm solid state laser applications.

S -wave contribution to rare D0→π+π−ℓ+ℓ− decays in the standard model and sensitivity to new physics

Physics of the up-type flavor offers unique possibilities of testing the standard model (SM) compared to the down-type flavor sector. Here, we discuss SM and new physics (NP) contributions to the rare charm-meson decay D0→π+π−ℓ+ℓ−. In particular, we discuss the effect of including the lightest scalar isoscalar resonance in the SM picture, namely, the f0(500), which manifests in a big portion of the allowed phase space. Other than showing in the total branching ratio at an observable level of about 20%, the f0(500) resonance manifests as interference terms with the vector resonances, such as at high invariant mass of the leptonic pair in distinct angular observables. Recent data from LHCb optimize the sensitivity to P-wave contributions that we analyze in view of the inclusion of vector resonances. We propose the measurement of alternative observables that are sensitive to the S-wave and are straightforward to implement experimentally. This leads to a new set of null observables that vanish in the SM due to its gauge and flavor structures. Finally, we study observables that depend on the SM interference with generic NP contributions from semileptonic four-fermion operators in the presence of the S-wave. Published by the American Physical Society 2024

Study of energy transfer process and radiative properties of CaAl4O7:Ho3+ phosphor for green light emission

This work comprehensively analyse the structural and photoluminescence properties of Ho3+-doped CaAl4O7 phosphor systems. X-ray diffraction (XRD), diffuse reflectance spectrum (DRS), photoluminescence (PL), and Fourier transform infrared (FT-IR) spectroscopy measurements were carried out, and Rietveld analysis confirmed the pure monoclinic structure of CaAl4O7:Ho3+ phosphor. The FT-IR spectrum showed absorption bands for the tetrahedral sites of the Al-O bonds and the octahedral sites of the Ca-O bonds, which indicate the formation of the CaAl4O7:Ho3+ phosphor. The diffuse reflectance spectrum shows sharp peaks in the visible and near-infrared regions. Photoluminescence excitation (PLE) measurements were performed on all the phosphor samples by monitoring emissions at 545 nm. Radiative properties such as total radiative transition probabilities (AT), radiative lifetime (τ rad), and branching ratios (β) are reported by Judd–Ofelt analysis and PLE spectral measurements. Upon 454 nm excitation, a green emission band is observed at around 545 nm (5F4 + 5S2 → 5I8), and these results indicate that x = 0.05 mol Ho3+ is the optimum concentration as the 5F4 + 5S2 → 5I8 emission intensity reaches its maximum. The emission intensity quenching and energy transfer mechanism are discussed, and the results suggest that the CaAl4O7:Ho3+ samples are suitable for green-emitting phosphor.

Dissociation of chlorobromomethane molecules coherently regulated by ultrafast strong field

Coherent control of molecular dissociation in ultrafast strong fields has received considerable attention in various scientific disciplines, such as atomic and molecular physics, physical chemistry, and quantum control. Many fundamental issues still exist regarding the understanding of phenomena, exploration of mechanisms, and development of control strategies. Recent progress has shown that manipulating the spectral phase distribution of a single ultrafast strong ultraviolet laser pulse while maintaining the the same spectral amplitude distribution can effectively control the total dissociation probability and branching ratios of molecules initially in the ground state. In this work, the spectral phase control of the photodissociation reaction of chlorobromomethane (CH<sub>2</sub>BrCl) is studied in depth by using a time-dependent quantum wave packet method, focusing on the influence of the initial vibrational state on the dissociation reaction. The results show that modifying the spectral phase of a single ultrafast pulse does not influence the total dissociation probability or branching ratio in the weak field limit. However, these factors exhibit significant dependence on the phase of the single ultrafast pulse spectrum under the strong field limit. By analyzing the population distribution of vibrational states in the ground electronic state, we observe that chirped pulses can effectively regulate the resonance Raman scattering (RRS) phenomenon induced in strong fields, thereby selectively affecting the dissociation probability and branching ratio based on initial vibrational states. Furthermore, we demonstrate that by selecting an appropriate initial vibration state and controlling both the value and sign of the chirp rate, it is possible to achieve preferential cleavage of Cl+CH<sub>2</sub>Br bonds. This study provides new insights into understanding of ultrafast coherent control of photodissociation reactions in polyatomic molecules.

Effect of L-shell spectator vacancies on the competition of filling the K, L1 and L23 vacancies and the natural widths of K-shell hole states of argon ions

The radiative and Auger decay of K-shell hole states of argon ions with configuration 1s2sm2pn3 s23p6 (m=0–2; n = 0–6) are studied theoretically using the flexible atomic code. The effect of L-shell spectator vacancies on the competition of filling the K, L1, and L23 vacancies is discussed for the first time. We find the K or L1 vacancy is preferred to be filled first when there is 0 or 1 vacancy in the L23 shell, but the L23 vacancy becomes the priority when the number of the L23 vacancies is larger than 2, and the total branching ratio of the L23 vacancy is as high as 66.98%, 74.66%, and 80.95% when the L23 shell has 4 vacancies and there are 2, 1 and 0 vacancies in the L1 shell, respectively. In addition, the natural widths of the K, L1, and L23 vacancies with different L-shell vacancy distributions are also calculated. The results show that they all first increase and then decrease with the number of L23 vacancies. It is expected that the present study will be useful for the qualitative analysis of the decay processes of multiple hole states, the understanding of ion yields and the production of satellites in x-ray and Auger spectra.

Laser cooling with intermediate state of spin–orbit coupling of LuF molecule

This work presents a theoretical study of the laser cooling feasibility of the molecule LuF, in the fine structure level of approximation. An ab-initio complete active space self-consistent field (CASSCF)/MRCI with Davidson correction calculation has been done in the Λ(±) and Ω(±) representations. The corresponding adiabatic potential energy curves and spectroscopic parameters have been investigated for the low-lying electronic states. The calculated values of the internuclear distances of the X3Σ0+ and (1)3Π0+ states show the candidacy of the molecule LuF for direct laser cooling. Since the existence of the intermediate (1)3Δ1 state cannot be ignored, the investigation has been done by taking into consideration the two transitions (1)3Π0+−(1)3Δ1 and (1)3Π0+ −X3Σ0+. The calculation of the Franck–Condon factors, the radiative lifetimes, the total branching ratio, the slowing distance, and the laser cooling scheme study prove that the molecule LuF is a good candidate for Doppler laser cooling.

Rare exclusive dileptonic [formula omitted] decay in two-Higgs doublet model

The rare exclusive dileptonic Λb0→nℓ+ℓ−(ℓ=e,μ,τ) decay is investigated in the general two-Higgs-doublet model of type III. In this model the mass of the charged Higgs boson mH, and the coupling vertices λtt and λbb are the only free parameters. The transition form-factors of the weak decay hadronic matrix elements are obtained based on the transition form-factors calculated within the framework of the relativistic quark-diquark picture. With these transition form-factors a significant enhancement to the differential branching ratio, total branching ratio, and leptons forward-backward asymmetries is achieved compared with the standard model predictions. Measurements of these quantities will provide a clear conjecture for new physics arising from the additional Higgs doublets. The attained orders of the branching ratios in this work are indicating that these channels can be investigated at the upcoming upgraded LHCb and/or at the Belle II detector in the near future.

Optical transitions and radiative properties of green emitting Ho3+:YVO4 phosphor.

The Ho3+-doped YVO4 phosphors were successfully prepared via a sol-gel process in which citric acid was used as a chelating agent. X-ray diffraction (XRD) confirmed the effective inclusion of Ho3+ ions into the host matrix with the formation of single phase YVO4. The surface morphology was observed using SEM, the results of which showed a grain growth propensity and the agglomeration of prepared phosphors. The V-O (VO4 3-) vibration mode was analyzed through Fourier transform infrared (FTIR) spectra. The spectroscopic properties were reported through UV-vis-NIR diffuse reflectance and photoluminescence (PL) spectra. The Judd-Ofelt (J-O) intensity parameters Ω 2 = 0.03 × 10-20 cm2, Ω 4 = 0.22 × 10-20 cm2, and Ω 6 = 0.23 × 10-20 cm2 obtained for the Y0.97VO4:0.03Ho3+ phosphors were used to obtain the total transition probabilities (A T), radiative lifetimes (τ rad) and branching ratios (β) for the certain transitions of Ho3+ ions. Under 310 nm UV excitation, the visible emission spectra were measured, and an intense emission was observed around 541 nm (green region) for all the samples. The emission cross-section σ P(λ) was 3.22 × 10-21 cm2 and the branching ratio (β) was 0.816; these were investigated to capture the optimal concentration of the Y0.97VO4:0.03Ho3+ phosphor. The estimated color coordinates were observed in the green region of CIE diagram. Ultimately, the superior properties (σ P(λ), β, and color purity) of Y0.97VO4:0.03Ho3+ phosphor may make it suitable for green emitting devices.

Strange quark mass effect in Bs→γγ, γℓℓ¯ decays

In this paper we investigate the next-to-leading power contribution to the ${B}_{s}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}$ and ${B}_{s}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\ell}\overline{\ensuremath{\ell}}$ decays from the strange quark mass effect with the dispersion approach which is QCD inspired and more predictive. We present the analytic expression of the quark mass contribution in the ${B}_{s}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}$ and ${B}_{s}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\ell}\overline{\ensuremath{\ell}}$ decays, together with a new term that is missed in the previous study. We also evaluate the resolved photon contribution from the A-type amplitude in ${B}_{s}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\ell}\overline{\ensuremath{\ell}}$ decay. The numerical results of the strange quark mass contribution to the ${B}_{s}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma}$ decay is about 6% relative to the total branching ratio, while it is relatively small in the ${B}_{s}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\ell}\overline{\ensuremath{\ell}}$ decay due to the large resonance contribution.

Signature of a light charged Higgs boson from top quark pairs at the LHC

The charged Higgs boson is a smoking gun of extensions of the standard model with multiple Higgs doublets, and has been searched for at various collider experiments. In this paper, we study the signature of a light charged Higgs boson produced by top quark pairs at the Large Hadron Collider (LHC), with subsequent three-body decays into a $W$ boson and a pair of bottom quarks. Cross sections on final states of two $W$ bosons plus four bottom quarks have been measured by the ATLAS Collaboration at the LHC 13 TeV. We reinterpret the experimental data under the scenario of a light charged Higgs boson and find improved agreements. We obtain the first limit from LHC direct searches on the total branching ratio of the three-body decay, $\mathrm{Br}(t\ensuremath{\rightarrow}{H}^{+}b)\ifmmode\times\else\texttimes\fi{}\mathrm{Br}({H}^{+}\ensuremath{\rightarrow}{W}^{+}b\overline{b})$, and the strongest direct constraints on the parameter space of a class of type-I two-Higgs-doublet models.

Study on the semileptonic transition of [formula omitted] in QCD: Promising case for the standard model

In this paper, we report on the semileptonic transitions of Bs→Ds2(2900)lν‾l, where l=e,μ,orτ with JP=2− by using the QCD sum rules within the standard model (SM). These channels which defined by the low energy Hamiltonian are calculated based on the transition form factors entering the hadronic matrix element. The form factors are obtained by using suitable fit functions that are then utilized to evaluate the total decay widths (TDW) and branching ratios of Bs→Ds2eν‾e=1.112×10−3,Bs→Ds2μν‾μ=1.093×10−3 and Bs→Ds2τν‾τ=7.412×10−6. The present results are consistent with the predications of the standard model as well as with the results of several studies on different channels. Therefore, such studied transition is promising to be achieved in the near future at LHCb experiment in CERN.

Higgs boson decays into a pair of heavy vector quarkonia

Rare Higgs decays into a pair of heavy vector quarkonia, h→VV (V=J/Ψ, ϒ etc.), have been investigated in the standard model. Different from the past literature in which these decays are thought to be only dominated by the longitudinally polarized final states, we also include the transitions, which proceed through h→γ⁎γ⁎/h→Vγ⁎, followed by γ⁎→V. The final vector quarkonia via these ways are dominantly transversely polarized. Our calculation however shows that these transitions could lead to significant contributions to the decay rate, especially for the charmonium final states. The total branching ratios of these processes are predicted to be around 10−10, far below the current experimental upper bounds. Hopefully, experimental studies of these very rare decays in future high-precision experimental facilities might be interesting both to test the standard model and to look for new physics scenarios.

Analysis of the structure and luminescence properties of Zn2 GeO4 :Eu3+ according to Judd-Ofelt theory.

The preparation and characteristic of nanorod-like Zn2 GeO4 doped with Eu3+ or zinc germanate (ZGO):xEu3+ (x = 0 ÷ 0.05), which was synthesized using the hydrothermal method, are described. The influence of Eu3+ -doping ions on the structure and the optical properties of ZGO was also investigated. According to the photoluminescence spectra, ZGO:xEu3+ nanophosphors gave a red emission due to the 5 D0 →7 F2 emission of Eu3+ ions. In accordance with Judd-Ofelt theory, the intensity parameters for f-f transitions from the emission and absorption spectrum were determined. At the 5 D0 excited state of Eu3+ , total spontaneous emission probabilities (AR ), lifetimes (τR ), branching ratios (βR ), and quantum efficiency (η) were calculated. The ZGO:xEu3+ (x = 0.02, 0.03, 0.04) phosphor showed the branch ratio β (5 D0 →7 F2 ) > 60%, indicating that the phosphors prepared here have a promising potential as laser light. The sample with a concentration of 0.04Eu3+ achieved the highest quantum efficiency of 84%, suggesting that it has potential light-emitting diode applications.

Structural, thermal, optical and luminescence properties of Dy3+ ions doped Zinc Potassium Alumino Borate glasses for optoelectronics applications

Zinc Potassium Alumino Borate (ZnKAlB) glasses doped with dysprosium (Dy3+) ions of different concentrations were synthesized through the process of melt quenching which is commonly used in solid-state lighting (SSL) and laser systems, to comprehend their viability. This article evaluates and analyzes the physical, structural, thermal and optical properties of Dy3+ ions doped glasses by X-ray diffraction (XRD), Infrared Fourier Transform (FT-IR), differential scanning calorimetry (DSC), UV absorption and photoluminescence (PL) spectra to explain their utilization in optoelectronic devices such as lasers and white light-emitting diodes (w-LEDs). The physical parameters viz. density, refractive index, inter-ionic distance, molar volume, polaron radius, field strength, optical electronegativity, dielectric constant, reflection loss and metallization were computed by following the expressions reported in the literature. Glasses are non-crystalline materials and the non-crystallinity of an un-doped Zinc Potassium Alumino Borate glass was proven by the absence of high-pitched peaks in the XRD spectra. FT-IR spectroscopy was used to identify the presence of different functional groups and their bond nature in Dy3+ ions doped ZnKAlB glasses. The transition temperature (Tg), melting temperature (Tm) and thermal stability was calculated by monitoring DSC thermograms of all glasses. Further, the bonding parameters (δ) and nephelauxetic ratio (β) were estimated to explore the bonding nature of Dy3+ ions in its neighborhoods by using UV-absorption data. The optical direct-indirect band gap energy (Eopt) and Urbach's energy (∆E) were enumerated from the absorption spectrum to elaborate electrical properties of as-prepared glasses. Judd-Ofelt theory was employed to find oscillator strengths from absorption spectra and for further calculation of radiative parameters such as the radiative lifetimes (τR), radiative transition probability (AR), total radiative transition probability (AT) and branching ratio (βR) to understand the quantum efficiency (η). Furthermore, the colorimetric parameters such as correlated color temperature (CCT), CIE coordinates and yellow to blue (Y/B) ratio were estimated from the PL emission data. The multipole-multipole interaction was confirmed by Dexter approximation to explain concentration quenching. This work primarily explains the essential features of borate glasses with Dy3+ ions doping to explain their potential use in tricolor w-LEDs and lasers.

Next-to-leading-order corrections to the Higgs strahlung process from electron\u2013positron collisions in extended Higgs models

We present the cross section for e^{+}e^{-}rightarrow hZ with arbitrary sets of electron and Z boson polarizations at the full next-to-leading order in various extended Higgs models, such as the Higgs singlet model (HSM), the inert doublet model (IDM) and the two Higgs doublet model (2HDM). We systematically perform complete one-loop calculations to the helicity amplitudes in the on-shell renormalization scheme, and present the full analytic results as well as numerical evaluations. The deviation Delta R^{hZ} in the total cross section from its standard model (SM) prediction is comprehensively analyzed, and the differences among these models are discussed in details. We find that new physics effects appearing in the renormalized hZZ vertex almost govern the behavior of Delta R^{hZ}, and it takes a negative value in most cases. The possible size of Delta R^{hZ} reaches several percent under the theoretical and experimental bounds. We also analyze the deviation Delta R^{hZ}_{XY} in the total cross section times decay branching ratios of the discovered Higgs boson by utilizing the H-COUP program. It is found that the four types of 2HDMs can be discriminated by analyzing the correlation between Delta R^{hZ}_{tau tau } and Delta R^{hZ}_{bb} and those between Delta R^{hZ}_{tau tau } and Delta R^{hZ}_{cc}. Furthermore, the HSM and the IDM can be discriminated from the 2HDMs by measuring Delta R^{hZ}_{WW}. These signatures can be tested by precision measurements at future Higgs factories such as the International Linear Collider.

Influence of intense laser fields on measurable quantities in [formula omitted]-boson decay

In principle, this paper suggests powerful laser technology as a promising instrument that can be experimentally useful to control the lifetime and branching ratio for an unstable particle decay. In a recent paper [ arXiv:2101.00224], we calculated theoretically the W−-boson leptonic decay (W−→ℓ−ν̄ℓ) in the presence of a circularly polarized laser and we showed that the laser significantly contributed to the diminution of the leptonic decay rate. In this paper, as a continuation of the previous one, we mainly deal with the theoretical calculation of the W−-boson hadronic decay (W−→qq̄′) and we combine the analytical results obtained in both papers to examine the effect of an intense laser, in terms of its field strength and frequency, on the three measurable quantities in W−-boson decay (total decay rate, lifetime and branching ratios). It was found that the laser has notably contributed to the reduction of the total decay rate leading to a longer lifetime. Most importantly, the two branching ratios (one for leptons and the other for hadrons) are affected (increased or decreased) by the presence of a strong external electromagnetic field. Combined together, these two complementary works may provide an in-depth and comprehensive study that would be useful for any experimental investigation in the future.

Spectroscopic analysis of Dy3+ ions activated borosilicate glasses for photonic device applications

Abstract A new series of optically translucent borosilicate glasses activated with varying concentrations of Dy3+ ions were fabricated by employing melt quenching method. Spectral investigations were conducted by recording the absorption, photoluminescent (PL) excitation and PL emission for Dy3+ activated borosilicate glasses. The absorption spectral information was exposed to Judd-Ofelt (J-O) analysis to calculate various radiative properties such as transition probability, total transition probability, branching ratios and radiative lifetimes of the as synthesized glasses. The excitation spectrum recorded under 483 nm emission wavelength possess a sharp peak at 348 nm in 0.1 mol% of Dy3+ ions doped borosilicate glass. Emission spectra recorded for all the Dy3+ ions activated borosilicate glasses under 348 nm intense excitation wavelength exhibit two potential peaks in visible region at 483 nm (4F9/2 → 6H15/2) and 575 nm (4F9/2 → 6H13/2). The emission centered at 483 nm is most prominent. Radiative properties measured from the absorption spectral feature were correlated with emission spectral information to estimate emission cross-section, gain bandwidth and optical gain parameters to understand the utility of the as synthesized glasses as photonic devices. The CIE coordinates measured for all the titled glasses are in good proximity with the white light coordinates of CIE 1931 diagram.

Visible emission studies of melt-grown Dy-doped CsPbCl3 and KPb2Cl5 crystals

We report results of the optical properties of Dy-doped CsPbCl3 and KPb2Cl5 bulk crystals for potential applications in yellow solid-state laser development. The crystals were synthesized from purified starting materials and melt-grown by vertical Bridgman technique. Optical transmission measurements revealed characteristic absorption bands from intra-4f transitions of Dy3+ ions. Direct optical excitation at 455 nm (6H15/2 → 4I15/2) resulted in dominant yellow emission bands at ∼575 nm from the 4F9/2 excited state of Dy3+ ions. In addition, both crystals exhibited weaker emission lines in the blue (∼483 nm) and red (∼670 nm) regions. The peak emission-cross sections for the yellow transition (4F9/2 → 6H13/2) were determined to be ∼0.22 × 10−20 cm2 for Dy: CsPbCl3 (λpeak = 576.5 nm) and ∼0.59 × 10−20 cm2 for Dy: KPb2Cl5 (λpeak = 574.5 nm). The spectral properties and decay dynamics of the 4F9/2 excited state were evaluated within the Judd-Ofelt theory to predict total radiative decay rates, branching ratios, and emission quantum efficiencies.

H-COUP Version 2: A program for one-loop corrected Higgs boson decays in non-minimal Higgs sectors

We present the concept of H-COUP_ver 2, which evaluates the decay rates (including higher order corrections) for the Higgs boson with a mass of 125GeV in various extended Higgs models. In the previous version (H-COUP_1.0), only a full set of the Higgs boson vertices are evaluated at one-loop level in a gauge invariant manner in these models. H-COUP_ver 2 contains all the functions of H-COUP_1.0. After shortly introducing these extended Higgs models and discussing their theoretical and experimental constraints, we summarize formulae for the renormalized vertices and the decay rates. We then explain how to install and run H-COUP_ver 2 with some numerical examples. Program summaryProgram title: H-COUP Version 2CPC Library link to program files: http://dx.doi.org/10.17632/f88szmrj5x.2Developer’s repository link: http://www-het.phys.sci.osaka-u.ac.jp/ hcoup/Licensing provisions: GPLv3Programming language: Fortran90Journal Reference of previous version: Comput. Phys. Commun. 233 (2018), 134–144Does the new version supersede the previous version?: YesReasons for the new version: The previous version (H-COUP_1.0), which numerically evaluates the full set of one-loop corrected vertex functions for the Higgs boson with a mass of 125 GeV, does not automatically provide the decay rates, the total decay width and branching ratios. In addition, QCD corrections have not been included in the previous version.Summary of revisions: Decay branching ratios and the total decay width for the Higgs boson with NLO electroweak and NNLO QCD corrections are added as outputs.Nature of problem: Decay rates for the Higgs boson and the total decay width are numerically evaluated at NLO for electroweak and NNLO for QCD in the Higgs singlet model, four types (Type-I, Type-II, Type-X, Type-Y) of two Higgs doublet models with a softly-broken Z2 symmetry and the inert doublet model.Solution of method: Electroweak and QCD corrections to the decay rates are computed by the improved on-shell scheme and the MS¯ scheme, respectively.Additional comments including restrictions and unusual features: All functions of the previous version are included in H-COUP_ver 2.