Preprints

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2017-12-05
17:01
arXiv [PUBDB-2017-12770] Preprint/Report
; ; ; et al
Enabling rootless Linux Containers in multi-user environments: the udocker tool
[DESY-17-096]
Containers are increasingly used as means to distribute and run Linux services and applications. In this paper we describe the architectural design and implementation of udocker a tool to execute Linux containers in user mode and we describe a few practical applications for a range of scientific codes meeting different requirements: from single core execution to MPI parallel execution and execution on GPGPUs..

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2017-12-05
16:58
arXiv [PUBDB-2017-12768] Preprint/Report
; ; ; et al
Reconciling EFT and hybrid calculations of the light MSSM Higgs-boson mass
[DESY-17-072]
Various methods are used in the literature for predicting the lightest CP-even Higgs boson mass in the Minimal Supersymmetric Standard Model (MSSM). Fixed-order diagrammatic calculations capture all effects at a given order and yield accurate results for scales of supersymmetric (SUSY) particles that are not separated too much from the weak scale. [...]

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2017-11-30
16:41
OpenAccess [PUBDB-2017-12636] Preprint/Report

Analysis of the $Wtb$ vertex from the measurement of triple-differential angular decay rates of single top quarks produced in the $t$-channel at $\sqrt{s}$ = 8 TeV with the ATLAS detector
[CERN-EP-2017-089; arXiv:1707.05393 ]
 GO
The electroweak production and subsequent decay of single top quarks in the $t$-channel is determined by the properties of the $Wtb$ vertex, which can be described by the complex parameters of an effective Lagrangian. An analysis of a triple-differential decay rate in $t$-channel production is used to simultaneously determine five generalised helicity fractions and phases, as well as the polarisation of the produced top quark. [...]
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2017-11-30
16:35
OpenAccess [PUBDB-2017-12633] Preprint/Report
; ; ; et al
Search for heavy resonances decaying to a $W$ or $Z$ boson and a Higgs boson in the $q\bar{q}^{(')}b\bar{b}$ final state in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
[CERN-EP-2017-111; arXiv:1707.06958 ]
Amsterdam : North-Holland Publ., (2017) [10.3204/PUBDB-2017-12633]  GO
ddc:530
A search for heavy resonances decaying to a $W$ or $Z$ boson and a Higgs boson in the $q\bar{q}^{(\prime)}b\bar{b}$ final state is described. The search uses 36.1 fb$^{-1}$ of proton-proton collision data at $\sqrt{s} =$ 13 TeV collected by the ATLAS detector at the CERN Large Hadron Collider in 2015 and 2016. [...]
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2017-11-30
16:12
OpenAccess [PUBDB-2017-12630] Preprint/Report

Measurements of top-quark pair differential cross-sections in the lepton+jets channel in $pp$ collisions at $\sqrt{s}$ = 13 TeV using the ATLAS detector
[CERN-EP-2017-058; arXiv:1708.00727 ]
 GO
Measurements of differential cross-sections of top-quark pair production in fiducial phase-spaces are presented as a function of top-quark and $t\bar{t}$ system kinematic observables in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$=13 TeV. The data set corresponds to an integrated luminosity of $3.2$ fb${}^{-1}$, recorded in 2015 with the ATLAS detector at the CERN Large Hadron Collider. [...]
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2017-11-30
16:08
OpenAccess [PUBDB-2017-12629] Preprint/Report

Search for new phenomena with large jet multiplicities and missing transverse momentum using large-radius jets and flavour-tagging at ATLAS in 13 TeV $pp$ collisions
[CERN-EP-2017-138; arXiv:1708.02794]
 GO
A search is presented for particles that decay producing a large jet multiplicity and invisible particles. The event selection applies a veto on the presence of isolated electrons or muons and additional requirements on the number of b-tagged jets and the scalar sum of masses of large-radius jets. [...]
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2017-11-30
16:06
OpenAccess [PUBDB-2017-12628] Preprint/Report

Search for direct top squark pair production in final states with two leptons in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector
[CERN-EP-2017-150; arXiv:1708.03247 ]
 GO
The results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb$^{-1}$ of integrated luminosity from proton--proton collisions at $\sqrt{s}=13$ TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark $\tilde{t}$ and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay $\tilde{t} \rightarrow b \tilde{\chi}_{1}^{\pm}$ into a $b$-quark and the lightest chargino with $\tilde{\chi}_{1}^{\pm} \rightarrow W \tilde{\chi}_{1}^{0}$, the decay $\tilde{t} \rightarrow t \tilde{\chi}_{1}^{0}$ into an on-shell top quark and the lightest neutralino, the three-body decay $\tilde{t} \rightarrow b W \tilde{\chi}_{1}^{0}$ and the four-body decay $\tilde{t} \rightarrow b \ell \nu \tilde{\chi}_{1}^{0}$. [...]
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2017-11-30
16:03
OpenAccess [PUBDB-2017-12625] Preprint/Report

Evidence for the $H \to b\bar{b}$ decay with the ATLAS detector
[CERN-EP-2017-175; arXiv:1708.03299 ]
 GO
A search for the decay of the Standard Model Higgs boson into a $b\bar{b}$ pair when produced in association with a $W$ or $Z$ boson is performed with the ATLAS detector. The analysed data, corresponding to an integrated luminosity of 36.1 fb$^{-1}$, were collected in proton-proton collisions in Run 2 of the Large Hadron Collider at a centre-of-mass energy of 13 TeV. [...]
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2017-11-30
16:00
OpenAccess [PUBDB-2017-12624] Preprint/Report

Measurement of multi-particle azimuthal correlations with the subevent cumulant method in $pp$ and $p$+Pb collisions with the ATLAS detector at the LHC
[CERN-EP-2017-160; arXiv:1708.03559 ]
 GO
A detailed study of multi-particle azimuthal correlations is presented using $pp$ data at $\sqrt{s}=5.02$ and 13 TeV, and $p$+Pb data at $\sqrt{s_{\rm{NN}}}=5.02$ TeV, recorded with the ATLAS detector at the LHC. The azimuthal correlations are probed using four-particle cumulants $c_{n}\{4\}$ and flow coefficients $v_n\{4\}=(-c_{n}\{4\})^{1/4}$ for $n=2$ and 3, with the goal of extracting long-range multi-particle azimuthal correlation signals and suppressing the short-range correlations. [...]
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2017-11-30
15:57
OpenAccess [PUBDB-2017-12623] Preprint/Report

Measurement of the exclusive $\gamma \gamma \rightarrow \mu^+ \mu^-$ process in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
[CERN-EP-2017-151; arXiv:1708.04053 ]
 GO
The production of exclusive $\gamma \gamma \rightarrow \mu^+ \mu^-$ events in proton--proton collisions at a centre-of-mass energy of 13 TeV is measured with the ATLAS detector at the LHC, using data corresponding to an integrated luminosity of 3.2 fb$^{-1}$. The measurement is performed for a dimuon invariant mass of 12 GeV m$_{\mu^+\mu^-}<$ 70 GeV. [...]
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