Search for the $γZ$ decay mode of heavy photophobic axion-like particles at the LHC
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913843399098368 |
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| author | Ding, Zilong Mao, Ying-nan Wang, Kechen |
| author_facet | Ding, Zilong Mao, Ying-nan Wang, Kechen |
| contents | We assume the coupling of Axion-like particle (ALP) to diphoton $g_{aγγ} \sim 0$ and accomplish detailed analyses for the $γZ$ decay mode of such heavy photophobic ALPs at the high luminosity-Large Hadron Collider (HL-LHC). ALPs are produced with two jets via both the $s$-channel vector boson exchange and vector boson fusion processes, with the signal process $pp \to jj\, a (\to γ\, Z (\to \ell^+ \ell^-)\, ) $ for $\ell = e, μ$. Signal and background events are simulated at the detector-level. Preselection criteria target events with one photon, two oppositely charged electrons or muons, and two non-$b$-tagged jets. The ALP mass is reconstructed, and kinematic observables are input into a machine learning-based multivariate analysis for optimal background rejection. Discover sensitivities on the ALP's coupling to di-$W$ boson, $g_{aWW}$, are presented in the mass range from 100 to 4000 GeV at center-of-mass energy $\sqrt{s} = 14$ TeV and integrated luminosity $\mathcal{L}=$ 3 ab$^{-1}$ and 140 fb$^{-1}$. Sensitivities on the production cross section $σ(pp \to jj\, a)$ times the branching ratio Br$(a \to γZ)$ are also presented. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_08660 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Search for the $γZ$ decay mode of heavy photophobic axion-like particles at the LHC Ding, Zilong Mao, Ying-nan Wang, Kechen High Energy Physics - Phenomenology We assume the coupling of Axion-like particle (ALP) to diphoton $g_{aγγ} \sim 0$ and accomplish detailed analyses for the $γZ$ decay mode of such heavy photophobic ALPs at the high luminosity-Large Hadron Collider (HL-LHC). ALPs are produced with two jets via both the $s$-channel vector boson exchange and vector boson fusion processes, with the signal process $pp \to jj\, a (\to γ\, Z (\to \ell^+ \ell^-)\, ) $ for $\ell = e, μ$. Signal and background events are simulated at the detector-level. Preselection criteria target events with one photon, two oppositely charged electrons or muons, and two non-$b$-tagged jets. The ALP mass is reconstructed, and kinematic observables are input into a machine learning-based multivariate analysis for optimal background rejection. Discover sensitivities on the ALP's coupling to di-$W$ boson, $g_{aWW}$, are presented in the mass range from 100 to 4000 GeV at center-of-mass energy $\sqrt{s} = 14$ TeV and integrated luminosity $\mathcal{L}=$ 3 ab$^{-1}$ and 140 fb$^{-1}$. Sensitivities on the production cross section $σ(pp \to jj\, a)$ times the branching ratio Br$(a \to γZ)$ are also presented. |
| title | Search for the $γZ$ decay mode of heavy photophobic axion-like particles at the LHC |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2411.08660 |