Summary of new ATLAS results from EPS-HEP 2021
26 July 2021 | By
The online edition of the European Physical Society Conference on High Energy Physics (EPS-HEP) kicks off today. This weeklong event – held from 26 to 30 July, 2021 – will virtually unite hundreds of particle physicists around the world. It is organised by the High Energy and Particle Physics Division of the European Physical Society, and is one of the major international conferences in the field. This is the first year that EPS-HEP has been held virtually since its establishment in 1971.
Members of the ATLAS Collaboration have prepared a wide range of results in anticipation of EPS-HEP. These will be presented throughout the week, and will include several new analyses of the full LHC Run 2 dataset (recorded 2015–2018). Look forward to new observations of rare processes, precision measurements of the Higgs boson, novel searches for new physics processes and more.
Key results will be explored in ATLAS Physics Briefings, to be released throughout the conference. Check the EPS 2021 tag for the latest updates.
Latest EPS-HEP 2021 News and Physics Briefings
- ATLAS reports first observation of WWW production, Physics Briefing, 26 July
- ATLAS reports first observation of WWW production, CERN News, 26 July
- Probing new physics with pairs of Higgs bosons, Physics Briefing, 28 July
- Two Higgs bosons are better than one, Physics Briefing, 30 July
- ATLAS measures key Higgs boson interaction with high precision, Physics Briefing, 2 August
- Hunting for forbidden decays of the Z boson, Physics Briefing, 3 August
New ATLAS results presented at EPS-HEP 2021
B-Physics
- Study of the B+c→J/ψD+s and B+c→J/ψD*+s decays in proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-046)
Exotic New Physics
- Search for the Charged-Lepton-Flavor Violating decay Z→eμ in proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-042)
- Combination and summary of ATLAS dark matter searches using 139 fb−1 of 13 TeV proton–proton collision data and interpreted in a two-Higgs-doublet model with a pseudoscalar mediator (ATLAS-CONF-2021-036)
- Search for events with a pair of displaced vertices from long-lived neutral particles decaying into hadronic jets in the ATLAS muon spectrometer in pp collisions at 13 TeV (ATLAS-CONF-2021-032)
- Search for single production of vector-like T quarks decaying to Ht or Zt in proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-040)
- A search for an unexpected asymmetry in the production of e+μ− and e−μ+ pairs in proton–proton collisions recorded by the ATLAS detector at 13 TeV (ATLAS-CONF-2021-045)
- Search for vector boson resonances decaying to a top quark and a bottom quark in hadronic final states using proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-043)
- Observation of electroweak production of two jets in association with an isolated photon and missing transverse momentum, and search for a Higgs boson decaying into invisible particles at 13 TeV with the ATLAS detector (arXiv: 2109.00925)
Supersymmetry
- Search for new phenomena in final states with photons, jets and missing transverse momentum in proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-028)
Standard Model
- Measurements of the production cross section of a Z boson in association with high transverse momentum jets in proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-033)
- Measurement of b-quark fragmentation properties in jets using the decay B±→J/ψK± in proton–proton collisions at 13 TeV with the ATLAS detector (STDM-2018-52)
- Measurement of the production cross section of pairs of isolated photons in proton–proton collisions at 13 TeV with the ATLAS detector (arXiv: 2107.09330, see figures)
- Combined effective field theory interpretation of differential cross-sections measurements of WW, WZ, 4l, and Z-plus-two-jets production using ATLAS data (ATL-PHYS-PUB-2021-022)
- Observation of WWW production in proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-039)
- Measurement of the cross-section of the electroweak production of a Zγ pair in association with two jets in proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-038)
Top quark
- Towards a precise interpretation of the top quark mass parameter in ATLAS Monte Carlo samples (ATL-PHYS-PUB-2021-034)
- Measurements of differential cross-sections in top-quark pair events with a high transverse momentum top quark and limits on beyond the Standard Model contributions to top-quark pair production with the ATLAS detector (ATLAS-CONF-2021-031)
Higgs boson
- Measurements of Higgs boson production cross-sections in the H→τ+τ− decay channel in proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-044)
- Search for associated production of a Z boson with an invisibly decaying Higgs boson or dark matter candidates at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-029)
Scalar boson and diboson searches
- Search for high-mass Wγ and Zγ resonances using 139 fb−1 of proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-041)
- Search for resonant and non-resonant Higgs boson pair production in the bbτ+τ− decay channel using 13 TeV proton–proton collision data from the ATLAS detector (ATLAS-CONF-2021-030)
- Search for resonant pair production of Higgs bosons in the bbbb final state using proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-035)
- Search for Higgs bosons decaying to new spin-0 or spin-1 particles in four-lepton final states at the ATLAS detector with 139 fb−1 of proton–proton collision data at 13 TeV (ATLAS-CONF-2021-034)
- Search for a light charged Higgs boson in t→H±b decays, with H±→cb, in the lepton+jets final state in proton–proton collisions at 13 TeV with the ATLAS detector (ATLAS-CONF-2021-037)
Combined Performance
- METNet: A pTmiss combined working point using a neural network with the ATLAS detector (ATL-PHYS-PUB-2021-025)
- Measurement of the energy response of the ATLAS calorimeter to charged pions from W±→τ±(→π±ντ)ντ events in Run 2 data (arXiv: 2108.09043)
