Higgs boson decay to charmonia via c-quark fragmentation

Han, Tao; Leibovich, Adam K.; Ma, Y.; Tan, Xiao-Ze

doi:10.1007/jhep08(2022)073

Cited by 8 publications

(10 citation statements)

References 67 publications

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“…According to the numerical results in Ref. [5], it is proper to employ the 𝜅 framework and parameterize (CS) QCD only and QCD+QED contributions, the red (green) solid curve is for the sum of full leading order (full CS) result. All curves are normalized using the full leading order decay width in Table 1.…”

Section: Probe Charm Quark Yukawa Couplingmentioning

confidence: 99%

“…In this paper, we suggest that it is possible to measure 𝑦 𝑐 at the High-Luminosity LHC (HL-LHC) via the Higgs decays 𝐻 → 𝑐 + c + 𝐽/𝜓 based on the recent calculation in Ref. [5].…”

Section: Introductionmentioning

confidence: 99%

“…Another potentially promising decay channel is 𝐻 → 𝑐 c + 𝐽/𝜓. The dominant contribution to this decay process is the fragmentation mechanism built upon the 𝐻 → 𝑐 c decay, and there are power/logarithmic enhancements due to the fragmentations of the 𝑐 quark, the photon, and the gluon splittings [5]. The typical Feynman diagrams for 𝐻 → 𝑐 c + 𝐽/𝜓 are listed out in Fig.…”

mentioning

confidence: 99%

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Higgs decay to charmonia and the charm-quark Yukawa coupling

Han¹,

Leibovich²,

Ma³

et al. 2022

Proceedings of 41st International Conference on High Energy Physics — PoS(ICHEP2022)

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After the great triumph of the Higgs discovery in 2012, the next target at the energy frontier will be to study the Higgs properties and to search for the next scale beyond the standard model of particle physics. Experimentally, the 𝐻 → 𝑐 c channel would be extremely difficult to dig out because of both the weak Yukawa coupling and the daunting standard model di-jet background. We propose to test the charm-quark Yukawa coupling at the LHC and future hadron colliders with the Higgs boson decay to 𝐽/𝜓 via the charm-quark fragmentation. Using the non-relativistic quantum chromodynamics, we study the charmonia production via the Higgs boson decay channel 𝐻 → 𝑐 c + 𝐽/𝜓(or 𝜂 𝑐 ), where both the color-singlet and color-octet contributions are considered. Our result opens another door to improve determinations at the LHC of the Higgs Yukawa couplings: the final state from this decay mode is quite distinctive with 𝐽/𝜓 → 𝑒 + 𝑒 − , 𝜇 + 𝜇 − and the branching fraction is enhanced by the charm-quark fragmentation mechanism.

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Section: Probe Charm Quark Yukawa Couplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Higgs decay to charmonia and the charm-quark Yukawa coupling

Han¹,

Leibovich²,

Ma³

et al. 2022

Proceedings of 41st International Conference on High Energy Physics — PoS(ICHEP2022)

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show abstract

“…With these collider platforms, some rare decays of the Higgs boson, such as the Higgs decays to quarkonium, may be measured [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39]. These rare decays can be used to determine the magnitude of the Yukawa couplings of the Higgs boson to the heavy quarks, and they have distinguished signals to be detected at the high-luminosity or high-energy colliders.…”

Section: Introductionmentioning

confidence: 99%

Higgs boson decays to $B_c$ meson in the fragmentation-function approach

Zheng¹,

Wu²,

Zhan³

et al. 2023

Preprint

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In the paper, we present a calculation of the decay widths for the Higgs boson decays to the Bc, B * c , Bc(2 1 S0) and B * c (2 3 S1) mesons using the fragmentation-function approach. In the calculation, the fragmentation functions up to order α 3 s based on the nonrelativistic QCD factorization theory are used, and the decay widths for H → Q + X and H → g + X at the partonic level are calculated up to order αs. The large logarithms of m 2 H /m 2 Bc are resummed up to next-to-leading logarithmic accuracy by solving the evolution equations for the running quark masses and the fragmentation functions. Compared to the leading-order decay widths based on the nonrelativistic QCD approach, the decay widths based on the fragmentation-function approach that include the higher-order QCD corrections are reduced significantly. Our numerical results show that there are about 1.2 × 10 5 Bc events via the Higgs decays to be produced at the HL-LHC with 3ab −1 , and about 1.6 × 10 6 Bc events via the Higgs decays to be produced at the HE-LHC with 15ab −1 .

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“…Nevertheless in such decays the "indirect" contribution (which is free of g HQQ interaction) dominates, and therefore g HQQ estimation is accessable only through the direct -indirect interference term. The perspectives for g HQQ measurement at LHC in the H → V Q Q decay mode are discussed in [16]. In the latter case the heavy quark fragmentation decay mechanism obviously dominates.…”

Section: Introductionmentioning

confidence: 99%