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ATLAS Papers

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2020-05-26
09:05
Search for Higgs boson decays into two new low-mass spin-0 particles in the 4$b$ channel with the ATLAS detector using $pp$ collisions at $\sqrt{s}=13$ TeV
This paper describes a search for beyond the Standard Model decays of the Higgs boson into a pair of new spin-0 particles subsequently decaying into $b$-quark pairs, $H \rightarrow aa \rightarrow (b\bar{b})(b\bar{b})$, using proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider at center-of-mass energy $\sqrt{s}=13$ TeV. [...]
CERN-EP-2020-067. - 2020.
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2020-05-20
08:15
Performance of the missing transverse momentum triggers for the ATLAS detector during Run-2 data taking / ATLAS Collaboration
The factor of four increase in the LHC luminosity, from $0.5\times 10^{34}\,\textrm{cm}^{-2}\textrm{s}^{-1}$ to $2.0\times 10^{34}\textrm{cm}^{-2}\textrm{s}^{-1}$, and the corresponding increase in pile-up collisions during the 2015-2018 data-taking period, presented a challenge for ATLAS to trigger on missing transverse momentum. [...]
arXiv:2005.09554 ; CERN-EP-2020-050. - 2020. - 53 p.
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2020-05-11
23:04
A search for the $Z\gamma$ decay mode of the Higgs boson in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector / ATLAS Collaboration
A search for the $Z\gamma$ decay of the Higgs boson, with $Z$ boson decays into pairs of electrons or muons is presented. [...]
arXiv:2005.05382 ; CERN-EP-2020-052. - 2020. - 37 p.
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2020-05-11
17:20
Search for $t\bar{t}$ resonances in fully hadronic final states in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
This paper presents a search for new heavy particles decaying into a pair of top quarks using 139 fb$^{-1}$ of proton$-$proton collision data recorded at a centre-of-mass energy of $\sqrt{s}=13$ TeV with the ATLAS detector at the Large Hadron Collider. [...]
arXiv:2005.05138 ; CERN-EP-2020-055. - 2020. - 40 p.
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2020-05-10
12:06
Performance of the upgraded PreProcessor of the ATLAS Level-1 Calorimeter Trigger / ATLAS Collaboration
The PreProcessor of the ATLAS Level-1 Calorimeter Trigger prepares the analogue trigger signals sent from the ATLAS calorimeters by digitising, synchronising and calibrating them to reconstruct transverse energy deposits, which are then used in further processing to identify event features. [...]
arXiv:2005.04179 ; CERN-EP-2020-042. - 2020. - 49 p.
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2020-05-06
22:38
Dijet resonance search with weak supervision using $\sqrt{s}=13$ TeV $pp$ collisions in the ATLAS detector / ATLAS Collaboration
This Letter describes a search for resonant new physics using a machine-learning anomaly detection procedure that does not rely on a signal model hypothesis. [...]
arXiv:2005.02983 ; CERN-EP-2020-062. - 2020. - 32 p.
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2020-04-30
13:01
Search for heavy diboson resonances in semileptonic final states in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
This paper reports on a search for heavy resonances decaying into $WW$, $ZZ$ or $WZ$ using proton$-$proton collision data at a centre-of-mass energy of $\sqrt{s}=13$ TeV. [...]
arXiv:2004.14636 ; CERN-EP-2020-049. - 2020. - 50 p.
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2020-04-29
17:19
Search for a scalar partner of the top quark in the all-hadronic $t\bar{t}$ plus missing transverse momentum final state at $\sqrt{s}$=13 TeV with the ATLAS detector / ATLAS Collaboration
A search for direct pair production of scalar partners of the top quark (top squarks or scalar third-generation up-type leptoquarks) in the all-hadronic $t\bar{t}$ plus missing transverse momentum final state is presented. [...]
arXiv:2004.14060 ; CERN-EP-2020-044. - 2020. - 65 p.
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2020-04-29
10:11
Performance of the ATLAS muon triggers in Run 2 / ATLAS Collaboration
The performance of the ATLAS muon trigger system is evaluated with proton$-$proton ($pp$) and heavy-ion (HI) collision data collected in Run 2 during 2015-2018 at the Large Hadron Collider. [...]
arXiv:2004.13447 ; CERN-EP-2020-031. - 2020. - 58 p.
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2020-04-23
09:54
Search for direct production of electroweakinos in final states with missing transverse momentum and a Higgs boson decaying into photons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration
A search for a chargino$-$neutralino pair decaying via the 125 GeV Higgs boson into photons is presented. [...]
arXiv:2004.10894 ; CERN-EP-2019-204. - 2020. - 44 p.
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