Probing the $R_{K^{(*)}}$ Anomaly at a Muon Collider

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

doi:10.48550/arxiv.2103.01617

Cited by 14 publications

(17 citation statements)

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“…Although the mass of the neutral heavy gauge boson Z in our theory is on the order of O(100) TeV, complementary probe from two body scattering might be found in a future muon collider experiment. It has recently been demonstrated that a 100 (400) TeV Z scenario can be probed at a future muon collider experiment with a center of mass energy of √ s = 3 TeV and an integrated luminosity of L = 1 ab −1 looking at µ + µ − → µ + µ − signature while considering the strength of the gauge coupling g X = 1 ( √ 4π) [77,78]. Note that there will be additional contributions to the Higgs observable as well.…”

Section: Other Implicationsmentioning

confidence: 99%

Flavor Seesaw

Jana¹,

Klett²,

Lindner³

2021

Preprint

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In the Standard Model, Yukawa couplings parametrize the fermion masses and mixing angles with the exception of neutrino masses. The hierarchies and apparent regularities among the quark and lepton masses are, however, otherwise a mystery.We propose a new class of models having two generations of vector-like fermions that can potentially address this problem and provide a new mechanism for fermion mass generation. The masses of the third and second generations of quarks and leptons arise at tree level via the seesaw mechanism from new physics at moderately higher scales, while loop corrections produce the masses for the first generation. This mechanism has a number of interesting and testable consequences. Among them are unavoidable flavor-violating signals at the upcoming experiments and the fact that neutrinos have naturally only Dirac masses.

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Section: Other Implicationsmentioning

confidence: 99%

Flavor Seesaw

Jana¹,

Klett²,

Lindner³

2021

Preprint

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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], BSM heavy Higgs boson discovery [6,7], WIMP dark matter searches [8,9], electroweak phase transition [10], lepton-universality violation [11,12], and a broad coverage for other new physics scenarios [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Quark and Gluon Contents of a Lepton at High Energies

Han,

Ma,

Xie

2021

Preprint

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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 j T ∼ 60 GeV.

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“…Multi-TeV muon colliders could then provide a possible new path to expand the energy frontier in accelerator physics, potentially allowing the direct production of new heavy states, even beyond the reach of alternative future high-energy colliders possibly following LHC [1,[23][24][25]. Many possible phenomenological implications for beyond-SM searches have recently been considered for multi-TeV muon colliders in [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. At the same time, multi-TeV muon collisions can offer a brand new laboratory to test with high precision the SM predictions for processes involving high-momentum transfer [44,45].…”

Section: Introductionmentioning

confidence: 99%

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

Chiesa,

Mele,

Piccinini

2021

Preprint

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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 µ HH, HHH]. We study total rates and kinematical distributions in the Standard Model, and compare them with the corresponding vector-boson-fusion processes V * V * → H, HH, HHH at muon collisions centerof-mass energies 1.5 TeV < ∼ √ s < ∼ 100 TeV. Possible strategies for enhancing the γγ → H, HH, HHH 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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Probing the $R_{K^{(*)}}$ Anomaly at a Muon Collider

Cited by 14 publications

References 0 publications

Flavor Seesaw

Flavor Seesaw

Quark and Gluon Contents of a Lepton at High Energies

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

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