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DITTO

Comprehensive search for new phenomena in the dilepton spectrum at the LHC

Grant period2023-10-01 - 2028-09-30
Funding bodyEuropean Union
Call numberERC-2022-COG
Grant number101089007
IdentifierG:(EU-Grant)101089007

Note: While the Standard Model of particle physics (SM) has proven tremendously successful, experimental evidence points to it not being a complete description of our universe, but a low energy approximation of a more complete theory. The searches for new phenomena (NP) are therefore an important component of the experimental program of the Large Hadron Collider (LHC). While there is no direct evidence for NP at the LHC, measurements of beauty hadron decays display a seemingly coherent pattern of deviations with respect to the SM predictions, which suggest that NP couples differently to three generations of matter. The quark-level processes responsible for these so-called ‘flavor anomalies’ are related to dilepton production processes (Drell-Yan scattering) through the crossing symmetry. The measurements of the kinematics of the high mass Drell-Yan (HMDY) process are therefore uniquely sensitive to a wide variety of NP explanations of the ‘anomalies’. The goal of this ground-breaking project is to provide for the first time the complete set of world’s most precise HMDY differential cross-section measurements covering not only the light lepton channels ev/μv/ee/µµ, but also extremely challenging third generation τv and ττ, ditau (DITTO), final states. These measurements will be used to probe NP at mass scales beyond the reach of direct production at the LHC through the SM effective field theory framework. The innovative performance and trigger improvements of the DITTO project will allow the ensemble of the proposed measurements to reach maximum precision, boosting the possibility for a NP discovery within the data sets expected to be collected by the ATLAS experiment at the LHC. Just as dilepton resonances, such as the J/ψ and Y mesons and the Z and W bosons were crucial for the establishment of the SM, the study of the same final state, to be undertaken in the DITTO project, will help to pave the way for a better understanding of the physics processes beyond it.
   

Recent Publications

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http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article  ;  ;  ; et al
Configuration, Performance, and Commissioning of the ATLAS b-jet Triggers for the 2022 and 2023 LHC data-taking periods
Journal of Instrumentation 20(03), P03002 () [10.1088/1748-0221/20/03/P03002]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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Search for heavy neutral leptons in decays of W bosons using leptonic and semi-leptonic displaced vertices in $ \sqrt{s} $ = 13 TeV pp collisions with the ATLAS detector
Journal of high energy physics 07(7), 196 () [10.1007/JHEP07(2025)196]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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Search for a new pseudoscalar decaying into a pair of bottom and antibottom quarks in top-associated production in $\sqrt{s}=13$ TeV proton–proton collisions with the ATLAS detector
The European physical journal / C 85(8), 886 () [10.1140/epjc/s10052-025-14507-0]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article  ;  ;  ; et al
Searches for direct slepton production in the compressed-mass corridor in $ \sqrt{\textrm{s}} $ = 13 TeV pp collisions with the ATLAS detector
Journal of high energy physics 08(8), 53 () [10.1007/JHEP08(2025)053]  GO DBCoverage  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article  ;  ;  ; et al
Measurements of the production cross-sections of a Higgs boson in association with a vector boson and decaying into WW$^{*}$ with the ATLAS detector at $ \sqrt{s} $ = 13 TeV
Journal of high energy physics 08(8), 34 () [10.1007/JHEP08(2025)034]  GO DBCoverage  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
Physics letters / B 861, 139277 () [10.1016/j.physletb.2025.139277]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article  ;  ;  ; et al
Search for new physics in final states with semivisible jets or anomalous signatures using the ATLAS detector
Physical review / D 112(1), 012021 () [10.1103/44zp-mh1q]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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Search for cascade decays of charged sleptons and sneutrinos in final states with three leptons and missing transverse momentum in pp collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
Physical review / D 112(1), 012005 () [10.1103/6gy3-cb4t]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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Charged-hadron and identified-hadron $(K_S^0, Λ, Ξ^−)$ yield measurements in photonuclear Pb+Pb and p+Pb collisions at $\sqrt{{s}_{NN}}$ = 5.02 TeV with ATLAS
Physical review / C 111(6), 064908 () [10.1103/7lx4-x8rw]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article  ;  ;  ; et al
Measurement of $W^{\pm}$-boson differential cross-sections in proton-proton collisions with low pile-up data at $\sqrt{s} = 5.02$ TeV and $13$ TeV with the ATLAS detector
The European physical journal / C 85(7), 729 () [10.1140/epjc/s10052-025-14178-x]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

All known publications ...
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 Record created 2023-08-27, last modified 2023-08-27
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