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ATLAS Preprints

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2022-05-12
15:14
Search for heavy, long-lived, charged particles with large ionisation energy loss in $pp$ collisions at $\sqrt{s} = 13~\text{TeV}$ using the ATLAS experiment and the full Run 2 dataset
This paper presents a search for hypothetical massive, charged, long-lived particles with the ATLAS detector at the LHC using an integrated luminosity of 139 $\mathrm{fb^{-1}}$ of proton-proton collisions at $\sqrt{s}=13$ TeV. [...]
CERN-EP-2022-029. - 2022.
Fulltext - Previous draft version

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2022-05-09
12:46
Di-Higgs searches at the LHC / Chernyavskaya, Nadezda (CERN) /ATLAS and CMS Collaborations
An overview of the recent searches for Higgs boson pair production at the LHC was presented. The searches were based on approximately 140 fb$^{-1}$ of data collected by the ATLAS and CMS experiments in proton-proton collisions at $\sqrt{s}$ = 13 TeV. [...]
CMS-CR-2021-046.- Geneva : CERN, 2021 - 7 p. Fulltext: PDF;
In : 55th Rencontres de Moriond on Electroweak Interactions and Unified Theories, Online, Online, 21 - 27 Mar 2021

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2022-05-09
12:45
Top quark production cross sections and rare processes at CMS and ATLAS / Saggio, Alessia (DESY) /ATLAS and CMS Collaborations
Inclusive and differential measurements of cross sections as well as searches for rare processes in the top quark sector provide an important test of the standard model (SM) and a powerful probe of physics beyond the SM (BSM). Recent results on inclusive and differential measurements of $\mathrm{t}\bar{\mathrm{t}}$, tZq, and $\mathrm{t}\bar{\mathrm{t}}+\mathrm{X}$ processes are reported, together with searches for flavour changing neutral currents (FCNCs) and charged lepton flavour violation (CLFV) in top quark processes, and for production of four top quarks. All results are obtained in proton-proton collision data, recorded by the ATLAS and CMS experiments at the CERN LHC from 2015 to 2018 at $\sqrt{s}=13$~TeV.}
CMS-CR-2022-054.- Geneva : CERN, 2022 - 7 p. Fulltext: PDF;
In : 56th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, It, 12 - 19 Mar 2022

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2022-05-09
12:39
Higgs cross-sections and properties at CMS and ATLAS / De Wit, Adinda Maite (Zurich U.) /ATLAS and CMS Collaborations
Measurements of Higgs boson production cross sections and properties, by the CMS and ATLAS experiments at the CERN LHC are presented. The focus is on recent results of simplified template cross section measurements, fiducial differential cross section measurements, and analyses probing the CP structure of the top quark Yukawa coupling. [...]
CMS-CR-2022-052.- Geneva : CERN, 2022 - 5 p. Fulltext: PDF;
In : 56th Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, It, 19 - 26 Mar 2022

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2022-05-06
14:55
Production of $\varUpsilon(\textrm{nS})$ mesons in Pb+Pb and $pp$ collisions at 5.02 TeV
A measurement of the production of vector bottomonium states, $\varUpsilon(\textrm{1S})$, $\varUpsilon(\textrm{2S})$, and $\varUpsilon(\textrm{3S})$, in Pb+Pb and $pp$ collisions at a center-of-mass energy per nucleon pair of 5.02 TeV is presented. [...]
arXiv:2205.03042 ; CERN-EP-2022-045. - 2022. - 21 p.
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2022-05-06
13:53
Differential $t\bar{t}$ cross-section measurements using boosted top quarks in the all-hadronic final state with 139 fb$^{-1}$ of ATLAS data
Measurements of single-, double-, and triple-differential cross-sections are presented for boosted top-quark pair-production in 13 $\text{TeV}$ proton-proton collisions recorded by the ATLAS detector at the LHC. [...]
arXiv:2205.02817 ; CERN-EP-2022-026. - 2022. - 104 p.
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2022-05-05
12:04
Search for flavour-changing neutral-current couplings between the top quark and the photon with the ATLAS detector at $\sqrt{s} = 13$ TeV
This letter documents a search for flavour-changing neutral currents (FCNCs), which are strongly suppressed in the Standard Model, in events with a photon and a top quark with the ATLAS detector. [...]
arXiv:2205.02537 ; CERN-EP-2022-042. - 2022. - 25 p.
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2022-05-05
11:13
Cross-section measurements for the production of a $Z$ boson in association with high-transverse-momentum jets in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
Cross-section measurements for a $Z$ boson produced in association with high-transverse-momentum jets ($p_{\mathrm{T}} \geq 100$ GeV) and decaying into a charged-lepton pair ($e^+e^-,\mu^+\mu^-$) are presented. [...]
arXiv:2205.02597 ; CERN-EP-2022-075. - 2022. - 29 p.
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2022-05-02
13:34
Flow harmonics in heavy ion physics at CMS and ATLAS / Krintiras, Georgios (Kansas U.) /ATLAS and CMS Collaborations
How can we gain a detailed insight into the hydrodynamic response of the system created in heavy ion collisions to the fluctuating initial geometry and viscous effects? Do we create a strongly interacting medium in proton-nucleus and proton-proton collisions, or rather a system of partons undergoing few scatterings? To what extent can we discriminate between initial momentum correlations and flow generated as a response to the initial geometry via interactions in the final state? Do measurements of identified particle flow confirm the observations from inclusive charged hadrons? An experimental overview of anisotropic flow measurements, ranging from large down to the smallest collision systems, is given in these proceedings. \\{\textnormal{Published in the}} Proceedings of the 2021 QCD and High Energy Interactions, ISBN: 979-10-96879-15-1
CMS-CR-2021-052.- Geneva : CERN, 2021 - 6 p. Fulltext: PDF;
In : 55th Rencontres de Moriond on QCD and High Energy Interactions, Online, Online, 27 Mar - 3 Apr 2021

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2022-05-02
13:34
Searches for exotic physics with boosted objects at CMS and ATLAS / Lange, Clemens (PSI, Villigen) /ATLAS and CMS Collaborations
Exotic physics can manifest itself in heavy resonances that could be accessible at the CERN LHC. The decay products of such a resonance are usually much lighter than the resonance itself so that they will be Lorentz-boosted. [...]
CMS-CR-2021-070.- Geneva : CERN, 2021 - 5 p. Fulltext: PDF;
In : 55th Rencontres de Moriond on QCD and High Energy Interactions, Online, Online, 27 Mar - 3 Apr 2021

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