NNLO QCD predictions of the asymmetry probe of the $Zγ$ pair-production process
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913193363767296 |
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| author | Saygin, Kadir |
| author_facet | Saygin, Kadir |
| contents | The paper presents for the first time a novel idea of exploiting asymmetry between differential cross sections of the $Zγ$ pair-production in proton-proton ($pp$) collisions for the final states of a charged-lepton pair plus a photon $pp \rightarrow Zγ\rightarrow l^{+}l^{-}γ$ (leptonic decay) and of a neutrino pair plus a photon $pp \rightarrow Z γ\rightarrow ν\barνγ$ (invisible decay). Asymmetry between the leptonic and invisible decays of the $Zγ$ process is investigated by using fixed-order predictions through inclusion of next-to-next-to-leading (NNLO) radiative corrections in quantum chromodynamics (QCD) perturbation theory. NNLO QCD predictions are presented at various $pp$-collision energies as functions of several key observables including transverse momenta and azimuthal-angle separation, regarding the $Zγ$ decay products. The predicted distributions for the $Zγ$ asymmetry are provided based on realistic fiducial phase-space requirements in line with the related hadron-collider measurements. The predicted distributions are assessed at various $pp$-collision energies and in different phase-space regions such as with higher lepton-pair invariant mass $m^{l^{+}l^{-}}$ or higher neutrino-pair transverse momentum $p_{\rm{T}}^{ν\barν}$ requirements. The $Zγ$ asymmetry is shown to be significantly sensitive in different regions of phase space including high-$m^{l^{+}l^{-}}$ and high-$p_{\rm{T}}^{ν\barν}$ regions. The $Zγ$ asymmetry can therefore be translated into an important quantity for probing deviation from the Standard Model (SM) predictions. In this regard, the asymmetry probe is proposed as a sensitive indicator for indirect searches for physics beyond the SM encompassing high-mass resonances and dark-matter sector. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_06404 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | NNLO QCD predictions of the asymmetry probe of the $Zγ$ pair-production process Saygin, Kadir High Energy Physics - Phenomenology The paper presents for the first time a novel idea of exploiting asymmetry between differential cross sections of the $Zγ$ pair-production in proton-proton ($pp$) collisions for the final states of a charged-lepton pair plus a photon $pp \rightarrow Zγ\rightarrow l^{+}l^{-}γ$ (leptonic decay) and of a neutrino pair plus a photon $pp \rightarrow Z γ\rightarrow ν\barνγ$ (invisible decay). Asymmetry between the leptonic and invisible decays of the $Zγ$ process is investigated by using fixed-order predictions through inclusion of next-to-next-to-leading (NNLO) radiative corrections in quantum chromodynamics (QCD) perturbation theory. NNLO QCD predictions are presented at various $pp$-collision energies as functions of several key observables including transverse momenta and azimuthal-angle separation, regarding the $Zγ$ decay products. The predicted distributions for the $Zγ$ asymmetry are provided based on realistic fiducial phase-space requirements in line with the related hadron-collider measurements. The predicted distributions are assessed at various $pp$-collision energies and in different phase-space regions such as with higher lepton-pair invariant mass $m^{l^{+}l^{-}}$ or higher neutrino-pair transverse momentum $p_{\rm{T}}^{ν\barν}$ requirements. The $Zγ$ asymmetry is shown to be significantly sensitive in different regions of phase space including high-$m^{l^{+}l^{-}}$ and high-$p_{\rm{T}}^{ν\barν}$ regions. The $Zγ$ asymmetry can therefore be translated into an important quantity for probing deviation from the Standard Model (SM) predictions. In this regard, the asymmetry probe is proposed as a sensitive indicator for indirect searches for physics beyond the SM encompassing high-mass resonances and dark-matter sector. |
| title | NNLO QCD predictions of the asymmetry probe of the $Zγ$ pair-production process |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.06404 |