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ATLAS Preprints

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2015-08-27
15:58
Measurements of fiducial cross-sections for $t\bar{t}$ production with one or two additional $b$-jets in $pp$ collisions at $\sqrt{s}$=8 TeV using the ATLAS detector / ,
Fiducial cross-sections for $t\bar{t}$ production with one or two additional $b$-jets are reported, using an integrated luminosity of 20.3 fb$^{-1}$ of proton--proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. [...]
CERN-PH-EP-2015-200 ; arXiv:1508.06868.
- 2015. - 38 p.
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2015-08-26
17:44
Summary of the ATLAS experiment's sensitivity to supersymmetry after LHC Run 1 - interpreted in the phenomenological MSSM / ,
A summary of the constraints from the ATLAS experiment on $R$-parity conserving supersymmetry is presented. [...]
CERN-PH-EP-2015-214 ; arXiv:1508.06608.
- 2015. - 58 p.
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2015-08-21
17:49
Search for flavour-changing neutral current top-quark decays to $qZ$ in $pp$ collision data collected with the ATLAS detector at $\sqrt{s}=8$ TeV
A search for the flavour-changing neutral-current decay $t\to qZ$ is presented. [...]
CERN-PH-EP-2015-183.
- 2015.
Fulltext - Previous draft version

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2015-08-13
06:57
Search for lepton--flavour--violating $H\to\mu\tau$ decays of the Higgs boson with the ATLAS detector / ,
A direct search for lepton--flavour--violating (LFV) $H\to\mu\tau$ decays of the recently discovered Higgs boson with the ATLAS detector at the LHC is presented. [...]
CERN-PH-EP-2015-184 ; arXiv:1508.03372.
- 2015. - 15 p.
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2015-08-12
07:55
Design and Construction of Large Size Micromegas Chambers for the Upgrade of the ATLAS Muon Spectrometer / Lösel, Philipp (Munich U.) ; Müller, Ralph (Munich U.)
Large area Micromegas detectors will be employed for the first time in high-energy physics experiments. [...]
arXiv:1508.02541.
- 2015.
Preprint

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2015-08-11
01:48
Constraints on non-Standard Model Higgs boson interactions in an effective field theory using differential cross sections measured in the $H \rightarrow \gamma\gamma$ decay channel at $\sqrt{s} = 8$ TeV with the ATLAS detector / ,
The strength and tensor structure of the Higgs boson's interactions are investigated within an effective field theory framework, which allows new CP-even and CP-odd interactions that can lead to changes in the kinematic properties of the Higgs boson and associated jet spectra. [...]
CERN-PH-EP-2015-182 ; arXiv:1508.02507.
- 2015. - 13 p.
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2015-08-06
05:14
Measurement of transverse energy--energy correlations in multi-jet events in $pp$ collisions at $\sqrt{s} = 7$ TeV using the ATLAS detector and determination of the strong coupling constant $\alpha_{\mathrm{s}}(m_Z)$ / ,
High transverse momentum jets produced in pp collisions at a centre of mass energy of 7 TeV are used to measure the transverse energy--energy correlation function and its associated azimuthal asymmetry. [...]
arXiv:1508.01579 ; CERN-PH-EP-2015-177.
- 2015. - 19 p.
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2015-08-04
19:28
Measurement of the centrality dependence of the charged-particle pseudorapidity distribution in proton--lead collisions at $\sqrt{s_{_\text{NN}}} = 5.02$ TeV with the ATLAS detector / ATLAS Collaboration
The centrality dependence of the mean charged-particle multiplicity as a function of pseudorapidity is measured in approximately 1 $\mu$b$^{-1}$ of proton--lead collisions at a nucleon--nucleon centre-of-mass energy of $\sqrt{s_{_\text{NN}}} = 5.02$ TeV using the ATLAS detector at the Large Hadron Collider. [...]
arXiv:1508.00848 ; CERN-PH-EP-2015-160.
- 2015. - 28 p.
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2015-07-31
19:13
Determination of the ratio of $b$-quark fragmentation fractions $f_s/f_d$ in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector / ATLAS Collaboration
With an integrated luminosity of 2.47 fb$^{-1}$ recorded by the ATLAS experiment at the LHC, the exclusive decays $B_{s}^{0}\rightarrow J/\psi\phi$ and $B_{d}^{0}\rightarrow J/\psi K^{*0}$ of $B$ mesons produced in $pp$ collisions at $\sqrt{s}=7$ TeV are used to determine the ratio of fragmentation fractions $f_s/f_d$. [...]
arXiv:1507.08925 ; CERN-PH-EP-2015-165.
- 2015. - 8 p.
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2015-07-29
16:44
Measurement of the branching ratio $\Gamma(\Lambda_b^0 \rightarrow \psi(2S)\Lambda^0)/\Gamma(\Lambda_b^0 \rightarrow J/\psi\Lambda^0)$ with the ATLAS detector / ATLAS Collaboration
An observation of the $\Lambda_b^0 \rightarrow \psi(2S) \Lambda^0$ decay and a comparison of its branching fraction with that of the $\Lambda_b^0 \rightarrow J/\psi \Lambda^0$ decay has been made with the ATLAS detector in proton--proton collisions at $\sqrt{s}=8\,$TeV at the LHC using an integrated luminosity of $20.6\,$fb$^{-1}$. [...]
arXiv:1507.08202 ; CERN-PH-EP-2015-164.
- 2015. - 12 p.
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