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Version 2

Search for squarks and gluinos in final states with jets and missing transverse momentum using 139 fb$^{-1}$ of $\sqrt{s}$ =13 TeV $pp$ collision data with the ATLAS detector
The
ATLAS
collaboration
Aad, Georges
;
Abbott, Brad
;
Abbott, Dale Charles
;
*et al. *

JHEP 02 (2021) 143, 2021.

https://inspirehep.net/literature/1827025
Inspire Record
1827025
DOI
10.17182/hepdata.95664
https://doi.org/10.17182/hepdata.95664
A search for the supersymmetric partners of quarks and gluons (squarks and gluinos) in final states containing jets and missing transverse momentum, but no electrons or muons, is presented. The data used in this search were recorded by the ATLAS experiment in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$ = 13 TeV during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb$^{-1}$. The results are interpreted in the context of various $R$-parity-conserving models where squarks and gluinos are produced in pairs or in association and a neutralino is the lightest supersymmetric particle. An exclusion limit at the 95% confidence level on the mass of the gluino is set at 2.30 TeV for a simplified model containing only a gluino and the lightest neutralino, assuming the latter is massless. For a simplified model involving the strong production of mass-degenerate first- and second-generation squarks, squark masses below 1.85 TeV are excluded if the lightest neutralino is massless. These limits extend substantially beyond the region of supersymmetric parameter space excluded previously by similar searches with the ATLAS detector.

150
data tables

Version 2

Measurement of jet fragmentation in Pb+Pb and $pp$ collisions at $\sqrt{s_{NN}} = 5.02$ TeV with the ATLAS detector
The
ATLAS
collaboration
Aaboud, Morad
;
Aad, Georges
;
Abbott, Brad
;
*et al. *

Phys.Rev.C 98 (2018) 024908, 2018.

https://inspirehep.net/literature/1673177
Inspire Record
1673177
DOI
10.17182/hepdata.91197
https://doi.org/10.17182/hepdata.91197
This paper presents a measurement of jet fragmentation functions in 0.49 nb$^{-1}$ of Pb+Pb collisions and 25 pb$^{-1}$ of $pp$ collisions at $\sqrt{s_{NN}} = 5.02$ TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultra-relativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in $pp$ collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 GeV and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

182
data tables

Version 5

Searches for electroweak production of supersymmetric particles with compressed mass spectra in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
The
ATLAS
collaboration
Aad, Georges
;
Abbott, Brad
;
Abbott, Dale Charles
;
*et al. *

Phys.Rev.D 101 (2020) 052005, 2020.

https://inspirehep.net/literature/1767649
Inspire Record
1767649
DOI
10.17182/hepdata.91374
https://doi.org/10.17182/hepdata.91374
This paper presents results of searches for electroweak production of supersymmetric particles in models with compressed mass spectra. The searches use 139 fb$^{-1}$ of $\sqrt{s}=13$ TeV proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider. Events with missing transverse momentum and two same-flavor, oppositely charged, low transverse momentum leptons are selected, and are further categorized by the presence of hadronic activity from initial-state radiation or a topology compatible with vector-boson fusion processes. The data are found to be consistent with predictions from the Standard Model. The results are interpreted using simplified models of $R$-parity-conserving supersymmetry in which the lightest supersymmetric partner is a neutralino with a mass similar to the lightest chargino, the second-to-lightest neutralino or the slepton. Lower limits on the masses of charginos in different simplified models range from 193 GeV to 240 GeV for moderate mass splittings, and extend down to mass splittings of 1.5 GeV to 2.4 GeV at the LEP chargino bounds (92.4 GeV). Similar lower limits on degenerate light-flavor sleptons extend up to masses of 251 GeV and down to mass splittings of 550 MeV. Constraints on vector-boson fusion production of electroweak SUSY states are also presented.

514
data tables

Expected 95% CL exclusion sensitivity for simplified models of direct higgsino production.

Expected 95% CL exclusion sensitivity for simplified models of direct higgsino production.

Expected 95% CL exclusion sensitivity for simplified models of direct higgsino production.

Expected 95% CL exclusion sensitivity for simplified models of direct higgsino production.

Expected 95% CL exclusion sensitivity for simplified models of direct higgsino production.

Observed 95% CL exclusion sensitivity for simplified models of direct higgsino production.

Observed 95% CL exclusion sensitivity for simplified models of direct higgsino production.

Observed 95% CL exclusion sensitivity for simplified models of direct higgsino production.

Observed 95% CL exclusion sensitivity for simplified models of direct higgsino production.

Observed 95% CL exclusion sensitivity for simplified models of direct higgsino production.

Expected 95% CL exclusion sensitivity for simplified models of VBF wino-bino production.

Expected 95% CL exclusion sensitivity for simplified models of VBF wino-bino production.

Expected 95% CL exclusion sensitivity for simplified models of VBF wino-bino production.

Expected 95% CL exclusion sensitivity for simplified models of VBF wino-bino production.

Expected 95% CL exclusion sensitivity for simplified models of VBF wino-bino production.

Observed 95% CL exclusion sensitivity for simplified models of direct wino-bino production.

Observed 95% CL exclusion sensitivity for simplified models of direct wino-bino production.

Observed 95% CL exclusion sensitivity for simplified models of direct wino-bino production.

Observed 95% CL exclusion sensitivity for simplified models of direct wino-bino production.

Observed 95% CL exclusion sensitivity for simplified models of direct wino-bino production.

Expected 95% CL exclusion sensitivity for simplified models of direct slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH slepton production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH slepton production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH smuon production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH smuon production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct LH selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct LH selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH selectron production.

Expected 95% CL exclusion sensitivity for simplified models of direct RH selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH selectron production.

Observed 95% CL exclusion sensitivity for simplified models of direct RH selectron production.