YOUNGST@RS - Colours in darkness: towards improved modelling of strongly interacting dark-sector showers

Session

ECS Session

18 Oct 2023, 14:55

14. HEPData for dark jet resonances

Danielle Joan Wilson-Edwards

18/10/2023, 14:55

ECS Lightning talk

Recently, the first search for a resonance arising from the dark sector in the fully hadronic channel, using the ATLAS detector, has been made public. Events containing at least two large-radius jets with high track multiplicity are selected, and a resonant search is performed over the invariant mass distributions of the multi-jet background. The analysis considered four...

15. Simulating near-conformal Hidden Valleys

Joshua Lockyer

18/10/2023, 15:05

ECS Lightning talk

We explore the behaviour of the running coupling within the Hidden Valley module of Pythia at a high number of flavours, finding that the current implementation cannot accurately simulate the expected behaviour. The unique IR behaviour at a high number of flavours allows us to demonstrate the first steps for finding a running coupling which matches the expected behaviour.

24. New experimental techniques for dark sectors

Angelica Aira Araw Ayalin

18/10/2023, 15:15

The nature of dark matter (DM) remains one of the biggest open questions in physics and has eluded astrophysical and cosmological scientists searching for indirect evidence of its existence. In recent years at the Large Hadron Collider (LHC), there has been an increase in efforts to explore the dark sector using LHC data. New studies explore the possibility of accessing the dark sector...

26. Emerging jet probes of strongly interacting dark sectors

Juliana Carrasco

19/10/2023, 14:30

A strongly interacting dark sector with long-lived dark mesons (lifetimes between few centimeters and few meters) can give rise to emerging jets, which have been sought by the CMS collaboration.In this talk I would describe the validation of the CMS emerging jet search using the publicly available material. We will interpretate this search in the context of Exotic Higgs decays, setting...

20. The Exploration of Bottom-quark-philic Semi-visible Jets

Wandile Nzuza

19/10/2023, 14:40

ECS Lightning talk

Proposing strongly interacting massive particles as dark matter candidates introduces a fascinating collider signature known as semi-visible jets. This study is a continuation of the first search for non-resonant production of SVJs, setting the first upper limits for strongly coupled dark sectors for a bi-fundamental mediator mass up to 2.7 TeV. The new search strategy...

22. Leptons lurking in semi-visible jets at the LHC

Cesare Tiziano Cazzaniga

19/10/2023, 14:50

ECS Lightning talk

Hidden Valley models propose alternative BSM scenarios to explain the nature of Dark Matter evading the phase-space currently probed by WIMPs searches. Under the assumption of a QCD-like confining dark sector, novel experimental signatures emerge, characterized by sprays of particles resembling hadronic jets containing stable invisible dark matter bound states. These...

21. Tau leptons-enriched semi-visible jets at the LHC

Tobias Fitschen

19/10/2023, 15:00

ECS Lightning talk

This Letter proposes a new signature for confining dark sectors at the Large Hadron Collider. Under the assumption of a QCD-like hidden sector, hadronic jets containing stable dark bound states could manifest in proton-proton collisions. We present a simplified model with a Z′ boson yielding the production of jets made up of dark bound states and subsequently leading to...

23. Set-Up for Semi-Visible Jets with Leptons

Clarisse Prat

19/10/2023, 15:10

ECS Lightning talk

Semi-visible jets (SVJs) arise in strongly-interacting dark matter scenarios. Fol- lowing a recent publication on leptons in SVJs [1], we have looked at a simpler model of generating Dark Photons in SVJs with leptons. We used the Pythia Hidden Valley module to generate a Z’ mediator that de- cays to two dark quarks. These then decay to a neutral dark sector pion that...

25. Dark sector jets with partial event building

Angelica Aira Araw Ayalin

The nature of dark matter (DM) remains one of the biggest open questions in physics and has eluded astrophysical and cosmological scientists searching for indirect evidence of its existence. In recent years at the Large Hadron Collider (LHC), there has been an increase in efforts to explore the dark sector using LHC data. New studies explore the possibility of accessing the dark sector...