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Peer-reviewedCC BY 4.0The European Physical Journal C

Prospects for probing neutral vector-like leptons via pair production at a muon collider

  • Chong-Xing Yue1
  • Mei-Shu-Yu Wang1
  • Xin-Yang Li1
  • Si-Yu Zhang1
  1. 1Liaoning Normal University
Open at sourcePDFDOICite

Abstract

Vector-like leptons (VLLs) are well-motivated candidates for physics beyond the standard model. We investigate the sensitivity of the 6 TeV muon collider to the neutral doublet VLL (denoted by N ) via its pair production in an SU(2) L L doublet model with hypercharge Y=−1/2 Y = - 1 2 . Assuming mixing with muons, we study the subsequent decay N→ W+ μ - N → W + μ - and analyze two representative signals, namely 4j2μ 4 j 2 μ and 2ℓ 2μ Ehspace−5.83328pt/ 2 ℓ 2 μ E / , arising from the hadronic and leptonic decays of the W boson, respectively. The signal and background events are simulated within a Monte Carlo framework, and a cut-based analysis is performed at the 6 TeV muon collider with an integrated luminosity ℒ=4 L = 4 ab −1 - 1 for the unpolarized and polarized beam configurations, (Pμ +,Pμ -)=(0,0) ( P μ + , P μ - ) = ( 0 , 0 ) and (Pμ +,Pμ -)=(−1,1) ( P μ + , P μ - ) = ( - 1 , 1 ) . We consider VLL masses in the range of 1300−2980 1300 - 2980 GeV and evaluate the corresponding search sensitivity. Our results show that the 6 TeV muon collider could provide strong sensitivity to neutral doublet VLLs through the 4j2μ 4 j 2 μ and 2ℓ 2μ Ehspace−5.83328pt/ 2 ℓ 2 μ E / signals, particularly for the idealized fully polarized beam configuration, under the detector, polarization, luminosity and background assumptions adopted in this analysis.

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Cite

BibTeXRIS
BibTeX
@article{yue2026prospects,
  title = {{Prospects for probing neutral vector-like leptons via pair production at a muon collider}},
  author = {Chong-Xing Yue and Mei-Shu-Yu Wang and Xin-Yang Li and Si-Yu Zhang},
  journal = {The European Physical Journal C},
  year = {2026},
  month = oct,
  doi = {10.1140/epjc/s10052-026-16466-6},
  url = {https://link.springer.com/10.1140/epjc/s10052-026-16466-6},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Prospects for probing neutral vector-like leptons via pair production at a muon collider
AU  - Chong-Xing Yue
AU  - Mei-Shu-Yu Wang
AU  - Xin-Yang Li
AU  - Si-Yu Zhang
PY  - 2026
DA  - 2026/10/12
JO  - The European Physical Journal C
DO  - 10.1140/epjc/s10052-026-16466-6
UR  - https://link.springer.com/10.1140/epjc/s10052-026-16466-6
AB  - Vector-like leptons (VLLs) are well-motivated candidates for physics beyond the standard model. We investigate the sensitivity of the 6 TeV muon collider to the neutral doublet VLL (denoted by N ) via its pair production in an SU(2) _L L doublet model with hypercharge Y=−1/2 Y = - 1 2 . Assuming mixing with muons, we study the subsequent decay N→ W^+ μ ^- N → W + μ - and analyze two representative signals, namely 4j2μ 4 j 2 μ and 2ℓ 2μ Ehspace−5.83328pt/ 2 ℓ 2 μ E / , arising from the hadronic and leptonic decays of the W boson, respectively. The signal and background events are simulated within a Monte Carlo framework, and a cut-based analysis is performed at the 6 TeV muon collider with an integrated luminosity ℒ=4 L = 4 ab ^−1 - 1 for the unpolarized and polarized beam configurations, (P_μ ^+,P_μ ^-)=(0,0) ( P μ + , P μ - ) = ( 0 , 0 ) and (P_μ ^+,P_μ ^-)=(−1,1) ( P μ + , P μ - ) = ( - 1 , 1 ) . We consider VLL masses in the range of 1300−2980 1300 - 2980 GeV and evaluate the corresponding search sensitivity. Our results show that the 6 TeV muon collider could provide strong sensitivity to neutral doublet VLLs through the 4j2μ 4 j 2 μ and 2ℓ 2μ Ehspace−5.83328pt/ 2 ℓ 2 μ E / signals, particularly for the idealized fully polarized beam configuration, under the detector, polarization, luminosity and background assumptions adopted in this analysis.
SN  - 1434-6044
SN  - 1434-6052
ER  -