Search for emerging jets in pp collisions at s = 13.6 TeV with the ATLAS experiment
Поиск возникающих струй в pp-столкновениях при s = 13,6 ТэВ с использованием эксперимента ATLAS
2025-08-21
SCID: 54.1/xvmjm7ft
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ATLAS experimentdark sectordisplaced verticesemerging jetslong-lived dark mesons
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Abstract (AI)
Abstract A search for emerging jets is presented using 51.8 fb−1 of proton–proton collision data at s = 13.6 TeV, collected by the ATLAS experiment during 2022 and 2023. The search explores a hypothetical dark sector featuring ‘dark quarks’ that are charged under a confining gauge group and couple to the standard model (SM) via a new mediator particle. These dark quarks undergo showering and hadronisation within the dark sector, forming long-lived dark mesons that decay back into SM particles. This results in jets that contain multiple displaced vertices known as emerging jets. The analysis targets events with pairs of emerging jets, produced either through a vector mediator, Z′, in the s-channel, or a scalar mediator, Φ, in the t-channel. No significant excess over the SM background is observed. Assuming a dark pion proper decay length between 5 mm and 50 mm, Z′ mediator masses between 600 GeV and 2550 GeV are excluded for quark and dark quark coupling values of 0.01 and 0.1, respectively. For a quark dark-quark coupling of 0.1, Φ mediator masses between 600 GeV and 1375 GeV are excluded. These results represent the first direct search targeting emerging jet pair production via a Z′ mediator, as well as the first study of emerging jet production mediated by a scalar particle exchanged in the t-channel.
Key Findings
1
ATLAS searched for emerging jets using 51.8 fb⁻¹ of proton–proton collision data at √s = 13.6 TeV collected during 2022–2023.
2
For a quark–dark-quark coupling of 0.1, scalar Φ mediator masses between 600 and 1375 GeV were excluded; these are first direct emerging-jet searches for Z′ s-channel and Φ t-channel production.
3
For dark-pion proper decay lengths of 5–50 mm, Z′ mediator masses from 600 to 2550 GeV were excluded for quark and dark-quark couplings of 0.01 and 0.1, respectively.
4
No significant excess over the Standard Model background was observed in events containing pairs of emerging jets.
5
The search targets dark-sector dark quarks whose hadronisation produces long-lived dark mesons, yielding jets with multiple displaced vertices.
Research Object
emerging jets produced in proton–proton collisions at √s = 13.6 TeV in a dark-sector model with long-lived dark mesons and Z′ or Φ mediators
Research Subject
emerging-jet pair production and its signatures through displaced vertices, including constraints on the Z′ and Φ mediator masses and couplings
Publication Details
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2025-08-21
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