| Article | |
| Report number | arXiv:2308.12804 ; PITT-PACC-2317 ; IP/BBSR/2023-09 |
| Title | Searching for heavy leptophilic Z′: from lepton colliders to gravitational waves |
| Related title | Searching for Heavy Leptophilic $Z'$: from Lepton Colliders to Gravitational Waves |
| Author(s) | Dasgupta, Arnab (Pittsburgh U.) ; Dev, P S Bhupal (McDonnell Ctr. Space Sci.) ; Han, Tao (Pittsburgh U.) ; Padhan, Rojalin (Pittsburgh U. ; Bhubaneswar, Inst. Phys. ; HBNI, Mumbai) ; Wang, Si (Pittsburgh U.) ; Xie, Keping (Pittsburgh U. ; Michigan State U.) |
| Publication | 2023 |
| Imprint | 2023-08-24 |
| Number of pages | 51 |
| In: | JHEP 2312 (2023) 011 |
| DOI | 10.1007/JHEP12(2023)011 (publication) |
| Subject category | hep-ph ; astro-ph.CO ; hep-ex ; Particle Physics - Phenomenology ; Astrophysics and Astronomy ; Particle Physics - Experiment |
| Study | IMCC |
| Abstract | We study the phenomenology of leptophilic $Z'$ gauge bosons at the future high-energy $e^+e^-$ and $\mu^+\mu^-$ colliders, as well as at the gravitational wave observatories. The leptophilic $Z'$ model, although well-motivated, remains largely unconstrained from current low-energy and collider searches for $Z'$ masses above ${\cal O}(100 {\rm GeV})$, thus providing a unique opportunity for future lepton colliders. Taking $U(1)_{L_\alpha-L_\beta} (\alpha,\beta=e,\mu,\tau)$ models as concrete examples, we show that future $e^+e^-$ and $\mu^+\mu^-$ colliders with multi-TeV center-of-mass energies provide unprecedented sensitivity to heavy leptophilic $Z'$ bosons. Moreover, if these $U(1)$ models are classically scale-invariant, the phase transition at the $U(1)$ symmetry-breaking scale tends to be strongly first-order with ultra-supercooling, and leads to observable stochastic gravitational wave signatures. We find that the future sensitivity of gravitational wave observatories, such as advanced LIGO-VIRGO and Cosmic Explorer, can be complementary to the collider experiments, probing higher $Z'$ masses up to ${\cal O}(10^4 {\rm TeV})$, while being consistent with naturalness and perturbativity considerations. |
| Copyright/License | publication: © 2023-2024 The Authors (License: CC-BY-4.0) preprint: (License: CC BY 4.0) |
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Registre creat el 2024-03-09, darrera modificació el 2024-03-14
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