Probing the 
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 anomaly at a muon collider

Huang, Guo-yuan; Jana, Sudip; Queiroz, Farinaldo S.; Rodejohann, Werner

doi:10.1103/physrevd.105.015013

Cited by 34 publications

(23 citation statements)

References 110 publications

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“…This exciting possibility could lead us to an unexplored regime at the energy and luminosity frontier for new physics reach beyond the Standard Model (SM). Indeed, beyond the extensive studies for a multi-TeV e + e − collider of the CERN Compact Linear Collider (CLIC) [3], some recent works on a high-energy muon collider have shown great physics potential for precision SM Higgs physics [4][5][6], BSM heavy Higgs boson discovery [7,8], WIMP dark matter searches [9,10], electroweak phase transition [11], lepton-universality violation [12,13], and a broad coverage for other new physics scenarios [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Quark and gluon contents of a lepton at high energies

Han

Xie

2022

J. High Energ. Phys.

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In high-energy leptonic collisions, such as at a multi-TeV muon collider, the collinear splittings of the electroweak (EW) gauge bosons and leptons are the dominant phenomena, and the scattering processes should thus be formulated in terms of the EW parton distribution functions (EW PDFs). We complete this formalism in the Standard Model to include the QCD sector and evaluate the quark and gluon PDFs inside a lepton at the double-log accuracy. The splittings of the photon and subsequently the quarks and gluons control the quark/gluon PDFs below the EW scale. The massive gauge bosons lead to substantial contributions at high scales. The jet production cross section can reach the order of a few nb (50 pb) in e+e−(μ+μ−) collisions, at the TeV c.m. energies with a moderate acceptance cut, that governs the overall event shape up to about $$ {p}_T^j $$ p T j ∼ 60 GeV. To complete the picture, we also provide an estimation of the total cross section for the photon-induced hadronic production at low partonic energies, which can reach the level of one hundred or a few tens of nb in high-energy electron or muon collisions.

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Section: Introductionmentioning

confidence: 99%

Quark and gluon contents of a lepton at high energies

Han

Xie

2022

J. High Energ. Phys.

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“…Muon colliders have recently attracted considerable interest as successor machines to the LHC [55][56][57][58][59][60][61][62][63][64]. Representative muon colliders concepts at the energy frontier may feature multi-TeV scale center-of-mass energies and luminosities of order ∼ ab −1 .…”

Section: Future Muon Collidersmentioning

confidence: 99%

Systematically Testing Singlet Models for $(g-2)_μ$

Capdevilla,

Curtin,

Kahn

et al. 2021

Preprint

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We comprehensively study all viable new-physics scenarios that resolve the muon (g − 2) µ anomaly with only Standard Model singlet particles coupled to muons. Since such models are only viable in the MeV -TeV mass range and require sizable muon couplings, they predict abundant accelerator production through the same interaction that resolves the anomaly. We find that a combination of fixed-target (NA64µ, M 3 ), B-factory (BABAR, Belle II), and collider (LHC, muon collider) searches can cover nearly all viable singlets scenarios, independently of their decay modes. In particular, future muon collider searches offer the only certain test of singlets above the GeV scale, covering all higher masses up to the TeV-scale unitarity limit for these models. Intriguingly, we find that O(100 GeV) muon colliders may yield better coverage for GeV-scale singlets compared to TeV-scale concepts, which has important implications for the starting center-of-mass energy of a staged muon collider program.

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“…Moreover, since the muon couples directly to the new Z gauge boson through the covariant derivative, the Z can provide the required contribution to the muon anomalous magnetic moment, while avoiding or suppressing strong bounds stemming from low energy electron colliders. This symmetry has been investigated in several aspects such as B meson decays [14,15], Higgs flavor violating decays [14,16], LFV processes [17,18], muon colliders [19,20], dark matter [21,22] and neutrino masses [23].…”

Section: Introductionmentioning

confidence: 99%

A 2HDM for the g-2 and Dark Matter

Arcadi¹,

Jesus²,

Melo³

et al. 2021

Preprint

Self Cite

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The Muon g-2 experiment at FERMILAB has confirmed the muon anomalous magnetic moment anomaly with an error bar 15% smaller and a different central value compared with the previous Brookhaven result. The combined results from FERMILAB and Brookhaven show a difference with theory at a significance of 4.2σ, strongly indicating the presence of new physics. In light of this new result, we discuss a Two Higgs Doublet model augmented by an Abelian gauge symmetry that can simultaneously accommodate a light dark matter candidate and (g − 2)µ, in agreement with existing bounds.

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Probing the RK(*) anomaly at a muon collider

Cited by 34 publications

References 110 publications

Quark and gluon contents of a lepton at high energies

Quark and gluon contents of a lepton at high energies

Systematically Testing Singlet Models for $(g-2)_μ$

A 2HDM for the g-2 and Dark Matter

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