Results 21 to 30 of about 62 (60)

Search for new physics in final states with semivisible jets or anomalous signatures using the ATLAS detector [PDF]

open access: yes
A search is presented for hadronic signatures of beyond the Standard Model (BSM) physics, with an emphasis on signatures of a strongly-coupled hidden dark sector accessed via resonant production of a $Z'$ mediator.
Birman, Mattias   +999 more
core   +1 more source

Search for flavour-changing neutral-current couplings between the top quark and the Higgs boson in multi-lepton final states in 13 TeV pp collisions with the ATLAS detector [PDF]

open access: yes
A search is presented for flavour-changing neutral-current interactions involving the top quark, the Higgs boson and an up-type quark (q = u, c) with the ATLAS detector at the Large Hadron Collider.
Birman, Mattias   +999 more
core   +1 more source

Jet radius dependence of dijet momentum balance and suppression in Pb+Pb collisions at 5.02 TeV with the ATLAS detector [PDF]

open access: yes
This paper describes a measurement of the jet radius dependence of the dijet momentum balance between leading back-to-back jets in 1.72 nb−1 of Pb+Pb collisions collected in 2018 and 255 pb−1 of pp collisions collected in 2017 by the ATLAS detector at ...
Birman, Mattias   +999 more
core   +1 more source

Measurement of the W-boson mass and width with the ATLAS detector using proton–proton collisions at √s = 7 TeV [PDF]

open access: yes
Proton–proton collision data recorded by the ATLAS detector in 2011, at a centre-of-mass energy of 7 TeV, have been used for an improved determination of the W-boson mass and a first measurement of the W-boson width at the LHC.
Birman, Mattias   +999 more
core   +1 more source

Configuration, performance, and commissioning of the ATLAS b-jet triggers for the 2022 and 2023 LHC data-taking periods [PDF]

open access: yes
In 2022 and 2023, the Large Hadron Collider produced approximately two billion hadronic interactions each second from bunches of protons that collide at a rate of 40 MHz.
Birman, Mattias   +999 more
core   +1 more source

The ATLAS trigger system for LHC Run 3 and trigger performance in 2022 [PDF]

open access: yes
The ATLAS trigger system is a crucial component of the ATLAS experiment at the LHC. It is responsible for selecting events in line with the ATLAS physics programme. This paper presents an overview of the changes to the trigger and data acquisition system
Birman, Mattias   +999 more
core   +1 more source

Searches for direct slepton production in the compressed-mass corridor in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector [PDF]

open access: yes
This paper presents searches for the direct pair production of charged light-flavour sleptons, each decaying into a stable neutralino and an associated Standard Model lepton.
Birman, Mattias   +999 more
core   +1 more source

Precision measurement of the B0 meson lifetime using B0 → J/ψ K∗0 decays with the ATLAS detector [PDF]

open access: yes
A measurement of the B0 meson lifetime using B0 → J/ψ K∗0 decays in data from 13 TeV proton–proton collisions with an integrated luminosity of 140 fb−1 recorded by the ATLAS detector at the LHC is presented. The measured effective lifetime is τ = 1.5053 ±
Birman, Mattias   +999 more
core   +1 more source

Search for long-lived charged particles using large specific ionisation loss and time of flight in 140 fb−1 of pp collisions at = 13 TeV with the ATLAS detector [PDF]

open access: yes
This paper presents a search for massive, charged, long-lived particles with the ATLAS detector at the Large Hadron Collider using an integrated luminosity of 140 f b−1 of proton-proton collisions at √ s = 13 TeV.
Birman, Mattias   +999 more
core   +1 more source

Measurement of the top-quark pole mass in dileptonic $t\bar{t}+ 1\text{-jet}$ events at $\sqrt{s}=13$ TeV with the ATLAS experiment [PDF]

open access: yes
A measurement of the top-quark pole mass $m_{t}^\text{pole}$ is presented in $t\bar{t}$~events with an additional jet, $t\bar{t}+1\text{-jet}$, produced in $pp$ collisions at $\sqrt{s}=13$ TeV.
Birman, Mattias   +999 more
core   +1 more source

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