Unravelling New Physics Signals at the HL-LHC with Low-Energy Constraints
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| Format: | Preprint |
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2024
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| _version_ | 1866910628172529664 |
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| author | Hammou, Elie Ubiali, Maria |
| author_facet | Hammou, Elie Ubiali, Maria |
| contents | Recent studies suggest that global fits of Parton Distribution Functions (PDFs) might inadvertently 'fit away' signs of new physics in the high-energy tails of the distributions measured at the high luminosity programme of the LHC (HL-LHC). This could lead to spurious effects that might conceal key BSM signatures and hinder the success of indirect searches for new physics. In this letter, we demonstrate that future deep-inelastic scattering (DIS) measurements at the Electron-Ion Collider (EIC), and at CERN via FASER$ν$ and SND@LHC at LHC Run III, and the future neutrino experiments to be hosted at the proposed Forward Physics Facility (FPF) at the HL-LHC, provide complementary constraints on large-$x$ sea quarks. These constraints are crucial to mitigate the risk of missing key BSM signals, by enabling precise constraints on large-$x$ PDFs through a 'BSM-safe' integration of both high- and low-energy data, which is essential for a robust interpretation of the high-energy measurements. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_00963 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unravelling New Physics Signals at the HL-LHC with Low-Energy Constraints Hammou, Elie Ubiali, Maria High Energy Physics - Phenomenology Recent studies suggest that global fits of Parton Distribution Functions (PDFs) might inadvertently 'fit away' signs of new physics in the high-energy tails of the distributions measured at the high luminosity programme of the LHC (HL-LHC). This could lead to spurious effects that might conceal key BSM signatures and hinder the success of indirect searches for new physics. In this letter, we demonstrate that future deep-inelastic scattering (DIS) measurements at the Electron-Ion Collider (EIC), and at CERN via FASER$ν$ and SND@LHC at LHC Run III, and the future neutrino experiments to be hosted at the proposed Forward Physics Facility (FPF) at the HL-LHC, provide complementary constraints on large-$x$ sea quarks. These constraints are crucial to mitigate the risk of missing key BSM signals, by enabling precise constraints on large-$x$ PDFs through a 'BSM-safe' integration of both high- and low-energy data, which is essential for a robust interpretation of the high-energy measurements. |
| title | Unravelling New Physics Signals at the HL-LHC with Low-Energy Constraints |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.00963 |