Leptons lurking in semi-visible jets at the LHC
Abstract This Letter proposes a new search for confining dark sectors at the Large Hadron Collider. As a result of the strong dynamics in the hidden sector, dark matter could manifest in proton-proton collisions at the Large Hadron Collider in form of hadronic jets containing stable invisible bound...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-09-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-022-10775-2 |
| _version_ | 1818064578038202368 |
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| author | Cesare Cazzaniga Annapaola de Cosa |
| author_facet | Cesare Cazzaniga Annapaola de Cosa |
| author_sort | Cesare Cazzaniga |
| collection | DOAJ |
| description | Abstract This Letter proposes a new search for confining dark sectors at the Large Hadron Collider. As a result of the strong dynamics in the hidden sector, dark matter could manifest in proton-proton collisions at the Large Hadron Collider in form of hadronic jets containing stable invisible bound states. These semi-visible jets have been studied theoretically and experimentally in the fully hadronic signature where the unstable composite dark matter can only decay promptly back to Standard Model quarks. We present a simplified model based on two messenger fields separated by a large mass gap allowing dark bound states to decay into pairs of oppositely charged leptons. The resulting experimental signature is characterized by non-isolated lepton pairs inside semi-visible jets. We propose a search strategy independent from the underlying model assumptions targeting this new signature, and discuss the orthogonality with respect to the existing searches. Remaining agnostic on the shape of the di-lepton spectrum, we determine the sensitivity of a dedicated analysis to the target signal. The proposed search can claim the $$3 \sigma $$ 3 σ evidence (exclusion) of the heavier mediator up to masses of 3.5 TeV (4.5 TeV) with the full Run 2 data of the LHC. Exploiting the resonant feature of the lepton pairs can enhance the sensitivity reach on a specific model. We estimate that an analysis using the di-lepton invariant mass information can reach $$5 \sigma $$ 5 σ discovery up to masses of 3.5 TeV and improve the exclusion up to more than 5 TeV. |
| first_indexed | 2024-12-10T14:38:13Z |
| format | Article |
| id | doaj.art-7a36a191e4bf4601b393e2cc508d7932 |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-12-10T14:38:13Z |
| publishDate | 2022-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-7a36a191e4bf4601b393e2cc508d79322022-12-22T01:44:47ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522022-09-018291810.1140/epjc/s10052-022-10775-2Leptons lurking in semi-visible jets at the LHCCesare Cazzaniga0Annapaola de Cosa1Institute for Particle Physics and Astrophysics, ETH ZürichInstitute for Particle Physics and Astrophysics, ETH ZürichAbstract This Letter proposes a new search for confining dark sectors at the Large Hadron Collider. As a result of the strong dynamics in the hidden sector, dark matter could manifest in proton-proton collisions at the Large Hadron Collider in form of hadronic jets containing stable invisible bound states. These semi-visible jets have been studied theoretically and experimentally in the fully hadronic signature where the unstable composite dark matter can only decay promptly back to Standard Model quarks. We present a simplified model based on two messenger fields separated by a large mass gap allowing dark bound states to decay into pairs of oppositely charged leptons. The resulting experimental signature is characterized by non-isolated lepton pairs inside semi-visible jets. We propose a search strategy independent from the underlying model assumptions targeting this new signature, and discuss the orthogonality with respect to the existing searches. Remaining agnostic on the shape of the di-lepton spectrum, we determine the sensitivity of a dedicated analysis to the target signal. The proposed search can claim the $$3 \sigma $$ 3 σ evidence (exclusion) of the heavier mediator up to masses of 3.5 TeV (4.5 TeV) with the full Run 2 data of the LHC. Exploiting the resonant feature of the lepton pairs can enhance the sensitivity reach on a specific model. We estimate that an analysis using the di-lepton invariant mass information can reach $$5 \sigma $$ 5 σ discovery up to masses of 3.5 TeV and improve the exclusion up to more than 5 TeV.https://doi.org/10.1140/epjc/s10052-022-10775-2 |
| spellingShingle | Cesare Cazzaniga Annapaola de Cosa Leptons lurking in semi-visible jets at the LHC European Physical Journal C: Particles and Fields |
| title | Leptons lurking in semi-visible jets at the LHC |
| title_full | Leptons lurking in semi-visible jets at the LHC |
| title_fullStr | Leptons lurking in semi-visible jets at the LHC |
| title_full_unstemmed | Leptons lurking in semi-visible jets at the LHC |
| title_short | Leptons lurking in semi-visible jets at the LHC |
| title_sort | leptons lurking in semi visible jets at the lhc |
| url | https://doi.org/10.1140/epjc/s10052-022-10775-2 |
| work_keys_str_mv | AT cesarecazzaniga leptonslurkinginsemivisiblejetsatthelhc AT annapaoladecosa leptonslurkinginsemivisiblejetsatthelhc |