ATLAS Conference Notes

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2025-07-09
15:31

Search for a resonance decaying into a scalar particle and a Higgs boson in the final state with two bottom quarks and two photons with 199 fb $^{−1}$ of data collected at √s=13 TeV and √s=13.6 TeV with the ATLAS detector.
A search for the resonant production of a heavy scalar

$X$ decaying into a Higgs boson and a lighter scalar

$S$ , through the process

$X \rightarrow S (\rightarrow b \bar{b})H ( \rightarrow \gamma\gamma)$ , where the two photons are consistent with the Higgs boson decay, is performed. [...]
ATLAS-CONF-2025-009. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-07-07
16:19

Observation of a cross-section enhancement near the $t\bar{t}$ production threshold in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
A measurement is presented of

$t\bar{t}$ production in the invariant-mass region near the pair production threshold,

$m_{t\bar{t}} \sim 345\,\mathrm{GeV}$ , in final states with two charged leptons and multiple jets. [...]
ATLAS-CONF-2025-008. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-07-07
16:18

Search for the Higgs boson decay to a $Z$ boson and a photon in $pp$ collisions at $\sqrt{s} = 13$ TeV and $13.6$ TeV with the ATLAS detector
A search for the Higgs boson decay to a

$Z$ boson and a photon in the

$\ell\ell\gamma$ (

$\ell = e, \mu$ ) final state is performed using

$pp$ collisions recorded with the ATLAS detector at

$\sqrt{s}=13.6$ TeV during 2022--2024, corresponding to an integrated luminosity of 165 fb

$^{-1}$ . [...]
ATLAS-CONF-2025-007. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-07-07
16:16

Combined measurements of Higgs boson production and decay at $\sqrt{s} =$ 13 TeV using up to 140 fb $^{-1}$ of data collected by the ATLAS Experiment
This note presents combined measurements of Higgs boson production and decay using up to 140 fb

$^{-1}$ of proton-proton collision data collected by the ATLAS experiment at the LHC at

$\sqrt{s} = 13$ TeV. [...]
ATLAS-CONF-2025-006. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-05-12
20:45

Study of Higgs boson pair production in the $HH \rightarrow bb \gamma\gamma$ final state with 308 fb $^{-1}$ of data collected at $\sqrt{s} = 13$ TeV and 13.6 TeV by the ATLAS experiment
A search for Higgs boson pair production in the

$b \overline{b} \gamma \gamma$ final state is performed. [...]
ATLAS-CONF-2025-005. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-04-08
20:57

Differential measurements of $\gamma\gamma\to\tau\tau$ using $\sqrt{s_{_\text{NN}}} = 5.02$ TeV Pb+Pb collisions with the ATLAS detector
This study presents differential fiducial cross-section measurements of photon-induced

$\tau$ -lepton pair production. [...]
ATLAS-CONF-2025-004. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-04-07
21:11

Measurement of coherent exclusive $J/\psi\to\mu^+\mu^-$ production in ultraperipheral Pb+Pb collisions at $\sqrt{s_{\textrm{NN}}}=5.36$ TeV with the ATLAS detector
This note presents a measurement of coherent exclusive

$J/\psi\to\mu^+\mu^-$ production in ultraperipheral Pb+Pb collisions at

$\sqrt{s_{\textrm{NN}}}=5.36$ TeV. [...]
ATLAS-CONF-2025-003. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2025-04-01
14:15

Measurements and interpretation of the Higgs boson differential and production mode cross sections in the $H \rightarrow ZZ^* \rightarrow 4\ell$ channel at $\sqrt{s}=13.6$ TeV with the ATLAS detector
Higgs boson production cross-sections are measured in the

$H\rightarrow~ZZ^\ast\rightarrow~4\ell$ decay channel based on 56 fb

$^{-1}$ of proton-proton collision data produced at the Large Hadron Collider at a centre-of-mass energy of 13.6 TeV and recorded by the ATLAS detector in 2022 and 2023. [...]
ATLAS-CONF-2025-002. - 2025 - 47.
Original Communication (restricted to ATLAS) - Full text

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2025-04-01
08:31

Measurements of $Z\gamma$ differential cross sections and search for neutral triple gauge couplings in $pp$ collisions at $\sqrt{s} =$ 13 TeV with the ATLAS detector
The measurements of the cross sections for

$Z\gamma$ production and the search for neutral triple gauge couplings (nTGC) through

$ZZ\gamma$ or

$\gamma^* Z\gamma$ vertices are presented, using the full Run2 proton-proton dataset of 140 fb

$^{-1}$ produced by the LHC at

$\sqrt{s}$ = 13 TeV and collected by the ATLAS detector. [...]
ATLAS-CONF-2025-001. - 2025 - mult..
Original Communication (restricted to ATLAS) - Full text

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2024-11-04
09:58