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ATLAS Preprints

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2021-09-21
16:43
Measurement of the $c$-jet mistagging efficiency in $t\bar{t}$ events using $pp$ collision data at $\sqrt{s}=13$ TeV collected with the ATLAS detector
A technique is presented to measure the efficiency with which $c$-jets are mistagged as b-jets (mistagging efficiency) using $t\bar{t}$ events, where one of the $W$ bosons decays into an electron or muon and a neutrino and the other decays into a quark-antiquark pair. [...]
CERN-EP-2021-166. - 2021.
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2021-09-06
19:46
Operation and performance of the ATLAS semiconductor tracker in LHC Run 2 / ATLAS Collaboration
The semiconductor tracker (SCT) is one of the tracking systems for charged particles in the ATLAS detector. [...]
arXiv:2109.02591 ; CERN-EP-2021-178. - 2021. - 55 p.
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2021-09-06
15:56
Search for exotic decays of the Higgs boson into $b\bar{b}$ and missing transverse momentum in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector / ATLAS Collaboration
A search for the exotic decay of the Higgs boson ($H$) into a $b\bar{b}$ resonance plus missing transverse momentum is described. [...]
arXiv:2109.02447 ; CERN-EP-2021-098. - 2021. - 38 p.
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2021-09-06
12:33
AtlFast3: the next generation of fast simulation in ATLAS / ATLAS Collaboration
The ATLAS experiment at the Large Hadron Collider has a broad physics programme ranging from precision measurements to direct searches for new particles and new interactions, requiring ever larger and ever more accurate datasets of simulated Monte Carlo events. [...]
arXiv:2109.02551 ; CERN-EP-2021-174. - 2021. - 75 p.
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2021-09-04
04:28
Observation of electroweak production of two jets in association with an isolated photon and missing transverse momentum, and search for a Higgs boson decaying into invisible particles at 13 TeV with the ATLAS detector / ATLAS Collaboration
This paper presents the measurement of the electroweak production of two jets in association with a $Z\gamma$ pair with the $Z$ boson decaying into two neutrinos. [...]
arXiv:2109.00925. - 58 p.

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2021-09-02
15:42
Observation of electroweak production of two jets in association with an isolated photon and missing transverse momentum, and search for a Higgs boson decaying into invisible particles at 13 TeV with the ATLAS detector
This paper presents the measurement of the electroweak production of two jets in association with a $Z\gamma$ pair with the $Z$ boson decaying into two neutrinos [...]
CERN-EP-2021-137. - 2021.
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2021-09-01
16:43
Measurement of the nuclear modification factor for muons from charm and bottom hadrons in Pb+Pb collisions at 5.02 TeV with the ATLAS detector / ATLAS Collaboration
Heavy-flavour hadron production provides information about the transport properties and microscopic structure of the quark- gluon plasma created in ultra-relativistic heavy-ion collisions. [...]
arXiv:2109.00411 ; CERN-EP-2021-153. - 2021. - 38 p.
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2021-08-31
11:08
Search for dark matter produced in association with a Standard Model Higgs boson decaying into $b$-quarks using the full Run 2 dataset from the ATLAS detector / ATLAS Collaboration
The production of dark matter in association with Higgs bosons is predicted in several extensions of the Standard Model. [...]
arXiv:2108.13391 ; CERN-EP-2021-074. - 2021. - 49 p.
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2021-08-26
09:32
Measurement of $b$-quark fragmentation properties in jets using the decay $B^{\pm} \to J/\psi K^{\pm}$ in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector / ATLAS Collaboration
The fragmentation properties of jets containing $b$-hadrons are studied using charged $B$ mesons in 139 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 13$ TeV, recorded with the ATLAS detector at the LHC during the period from 2015 to 2018. [...]
arXiv:2108.11650 ; CERN-EP-2021-123. - 2021. - 46 p.
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2021-08-20
10:59
Measurement of the energy response of the ATLAS calorimeter to charged pions from $W^{\pm}\rightarrow\tau^{\pm}(\rightarrow\pi^{\pm}\nu_{\tau})\nu_{\tau}$ events in Run 2 data / ATLAS Collaboration
The energy response of the ATLAS calorimeter is measured for single charged pions with transverse momentum in the range $10<p_\textrm{T}<300$ GeV. [...]
arXiv:2108.09043 ; CERN-EP-2021-147. - 2021. - 42 p.
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