Precision Higgs width and couplings with a high energy muon collider

Forslund, Matthew; Meade, Patrick

doi:10.1007/jhep01(2024)182

Cited by 7 publications

(1 citation statement)

References 111 publications

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“…This holds true especially for the electroweak (EW) sector of the SM whose phenomenology is moderately affected by QCD backgrounds at lepton colliders. 1 In particular, Higgs boson physics can be tested in new energy regimes [27,83,[87][88][89][90] with the enhancement of extremely challenging production channels like the triple Higgs production which is sensitive to the quartic Higgs self-coupling [91].…”

Section: Introductionmentioning

confidence: 99%

Multi Higgs production via photon fusion at future multi-TeV muon colliders

Chiesa,

Mele,

Piccinini

2024

Eur. Phys. J. C

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Multi-TeV muon colliders promise an unprecedented potential for exploring the particle-physics energy frontier, and, at the same time, can probe with fantastic accuracy the precise structure of the Standard Model, and in particular of the Higgs boson sector. Here we consider the possibility to measure the loop-suppressed single-, double-, triple-Higgs boson production mediated by the collinear-photon scattering in the channels $$\mu ^+\mu ^-\rightarrow \mu ^+\mu ^-\gamma ^*\gamma ^*\rightarrow \mu ^+\mu ^- \,[H,HH,HHH]$$ μ + μ - → μ + μ - γ ∗ γ ∗ → μ + μ - [ H , H H , H H H ] . We study total rates and kinematical distributions in the Standard Model, and compare them with the corresponding vector-boson-fusion processes $$V^*V^*\rightarrow H,HH,HHH$$ V ∗ V ∗ → H , H H , H H H at muon collisions center-of-mass energies 1.5 TeV"Equation missing" TeV. Possible strategies for enhancing the $$\gamma \gamma \rightarrow H,HH,HHH$$ γ γ → H , H H , H H H signal over the dominant vector-boson-fusion production are proposed. The sensitivity of total rates to possible anomalies in the Higgs-boson self-couplings is also discussed.

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Section: Introductionmentioning

confidence: 99%

Multi Higgs production via photon fusion at future multi-TeV muon colliders

Chiesa,

Mele,

Piccinini

2024

Eur. Phys. J. C

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Composite resonances at a 10 TeV muon collider

Liu,

Wang,

Xie

2024

J. High Energ. Phys.

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We investigate the reach for resonances of the composite Higgs models at a 10 TeV μ+μ− collider with up to 10 ab−1 luminosity. The strong dynamics sector is modeled by the minimal coset SO(5)/SO(4), where vector resonances are in (3, 1) of SO(4) and fermions are in (2, 2). Various production and decay channels are studied. For the spin-1 resonances, the projections are made based on the radiative return and vector boson fusion production channels. The muon collider can cover most of the kinematically allowed mass range and can measure the coupling gρ to percent level. For the fermionic resonances (i.e. the top partners), pair production easily covers the resonance mass below 5 TeV, while single production extends the reach to 6 TeV for a small ξ = 0.015.

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Probing Inert Triplet Model at a multi-TeV muon collider via vector boson fusion with forward muon tagging

Bandyopadhyay,

Parashar,

Sen

et al. 2024

J. High Energ. Phys.

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This study investigates the potential of a multi-TeV Muon Collider (MuC) for probing the Inert Triplet Model (ITM), which introduces a triplet scalar field with hypercharge Y = 0 to the Standard Model. The ITM stands out as a compelling Beyond the Standard Model scenario, featuring a neutral triplet T0 and charged triplets T±. Notably, T0 is posited as a dark matter (DM) candidate, being odd under a Z2 symmetry. Rigorous evaluations against theoretical, collider, and DM experimental constraints corner the triplet scalar mass to a narrow TeV-scale region, within which three benchmark points are identified, with T± masses of 1.21 TeV, 1.68 TeV, and 3.86 TeV, for the collider study. The ITM’s unique TTVV four-point vertex, differing from fermionic DM models, facilitates efficient pair production through Vector Boson Fusion (VBF). This characteristic positions the MuC as an ideal platform for exploring the ITM, particularly due to the enhanced VBF cross-sections at high collision energies. To address the challenge of the soft decay products of T± resulting from the narrow mass gap between T± and T0, we propose using Disappearing Charged Tracks (DCTs) from T± and Forward muons as key signatures. We provide event counts for these signatures at MuC energies of 6 TeV and 10 TeV, with respective luminosities of 4 ab−1 and 10 ab−1. Despite the challenge of beam-induced backgrounds contaminating the signal, we demonstrate that our proposed final states enable the MuC to achieve a 5σ discovery for the identified benchmark points, particularly highlighting the effectiveness of the final state with one DCT and one Forward muon.

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Precision Higgs width and couplings with a high energy muon collider

Cited by 7 publications

References 111 publications

Multi Higgs production via photon fusion at future multi-TeV muon colliders

Multi Higgs production via photon fusion at future multi-TeV muon colliders

Composite resonances at a 10 TeV muon collider

Probing Inert Triplet Model at a multi-TeV muon collider via vector boson fusion with forward muon tagging

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