ATLAS Conference Notes

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2021-07-29
18:27

Measurements of the production cross section of a $Z$ boson in association with high transverse momentum jets in $pp$ collisions at $\sqrt{s} = 13$~TeV with the ATLAS detector
Measurements of the production cross section of a $Z$ boson in association with at least one high transverse momentum jet are presented, separating topologies corresponding to the emission of a $Z$ boson from dijet events and topologies with a boosted $Z$ recoiling against a high-energy jet. [...]
ATLAS-CONF-2021-033. - 2021.
Original Communication (restricted to ATLAS) - Full text

2021-07-29
18:25

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 $\sqrt{s}=13$ TeV
A search for events with two displaced vertices from long-lived particles (LLP) pairs using data collected by the ATLAS detector at the LHC is presented. [...]
ATLAS-CONF-2021-032. - 2021.
Original Communication (restricted to ATLAS) - Full text

2021-07-29
18:24

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
Cross-section measurements of top-quark pair production where the hadronically decaying top quark has transverse momentum greater than $355$ GeV are presented using 139 fb$^{-1}$ of data collected by the ATLAS experiment during proton-proton collisions at the LHC. [...]
ATLAS-CONF-2021-031. - 2021.
Original Communication (restricted to ATLAS) - Full text

2021-07-29
18:23

Search for resonant and non-resonant Higgs boson pair production in the $b\bar b\tau^+\tau^-$ decay channel using 13 TeV $pp$ collision data from the ATLAS detector
A search for Higgs boson pair production in events with two $b$-jets and two $\tau$-leptons is presented, using a $pp$ collision data set with an integrated luminosity of $139~\text{fb}^{-1}$ collected at $\sqrt{s}=13~\text{TeV}$ by the ATLAS experiment at the LHC. [...]
ATLAS-CONF-2021-030. - 2021.
Original Communication (restricted to ATLAS) - Full text

2021-07-29
18:21

Search for associated production of a $Z$ boson with an invisibly decaying Higgs boson or dark matter candidates at $\sqrt{s}=13$ TeV with the ATLAS detector
A search for invisible decays of the Higgs boson as well as searches for dark matter candidates, produced together with a leptonically decaying $Z$ boson, are presented. [...]
ATLAS-CONF-2021-029. - 2021.
Original Communication (restricted to ATLAS) - Full text

2021-07-29
18:18

Search for new phenomena in final states with photons, jets and missing transverse momentum in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
A search for new phenomena has been performed in final states with at least one isolated high momentum photon, jets and missing transverse momentum in proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 13$ TeV. [...]
ATLAS-CONF-2021-028. - 2021. - 20 p.
Original Communication (restricted to ATLAS) - Full text

2021-06-23
08:31

Measurement of the polarisation of single top quarks and antiquarks produced in the $t$-channel collected with the ATLAS detector at $\sqrt{s}=$ 13 TeV and bounds on the $tWb$ dipole operator
A simultaneous measurement of the three components of the top-quark and top-antiquark polarisation vectors in $t$-channel single-top-quark production is presented. [...]
ATLAS-CONF-2021-027. - 2021.
Original Communication (restricted to ATLAS) - Full text

2021-06-18
11:31

Search for heavy resonances decaying into a $W$ boson and a Higgs boson in final states with leptons and $b$-jets in $139~fb^{-1}$ of $pp$ collisions at $\sqrt{s}=13~\mathrm{TeV}$ with the ATLAS detector
This note presents a search for a new resonance $W^\prime$ decaying into a $W$ boson and a $125~\mathrm{GeV}$ Higgs boson $H$ in the $\ell\nu bb$ final state, where $\ell = e,$ or $\mu$, using $pp$ collision data at 13 TeV corresponding to an integrated luminosity of 139 fb$^{-1}$ collected by the ATLAS detector at the LHC. [...]
ATLAS-CONF-2021-026. - 2021.
Original Communication (restricted to ATLAS) - Full text

2021-06-18
11:29

Search for high-mass resonances in final states with a tau lepton and missing transverse momentum with the ATLAS detector
A search for high-mass resonances decaying to tau lepton and a neutrino using proton–proton collisions at a center-of-mass energy of $\sqrt{s}=$13 TeV is presented. [...]
ATLAS-CONF-2021-025. - 2021.
Original Communication (restricted to ATLAS) - Full text

2021-06-18
11:28

Search for pair-production of vector-like quarks in $pp$ collision events at $\sqrt{s}=13$~TeV with at least one leptonically-decaying $Z$~boson and a third-generation quark with the ATLAS detector
A search for the pair-production of vector-like quarks optimized for decays to a $Z$ boson and a third-generation Standard Model quark is presented, using the full Run 2 dataset corresponding to $139\,\mathrm{fb}^{-1}$ of $pp$ collisions at $\sqrt{s}=13\,\mathrm{TeV}$, collected in 2015-2018 with the ATLAS detector at the Large Hadron Collider. [...]
ATLAS-CONF-2021-024. - 2021.
Original Communication (restricted to ATLAS) - Full text

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