Preprints

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2020-01-30
10:49
OpenAccess [PUBDB-2020-00614] Preprint
et al
Development of a large active area beam telescope based on the SiD microstrip sensor
A beam telescope as one of the most important and often requested test beam equipment provides particle tracking to test beamusers. At the DESY II test beam facility, a new beam telescope called Lycoris based on a microstrip sensor has been designed toaddress the user demands for momentum measurement in a 1 T solenoid magnet or large area tracking with limited space (3:5 cmbetween the potential user device and the magnet inner wall). [...]
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2020-01-29
13:13
[PUBDB-2020-00609] Preprint
et al
Low Phase Noise Local Oscillator and Clock Generation for Cavity Field Detection
When designing Low-Level RF (LLRF) system for the new generation of Free-Electron Laser (FEL) machines there are many considerations. First is superior performance of the front-end electronics focused on ultra-low phase noise which contributes to the quality of the electromagnetic field of superconducting RF cavities in accelerating modules, stability of accelerated electron bunches arrival time and finally to the output laser light of FEL. [...]
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2020-01-27
10:52
OpenAccess [PUBDB-2020-00555] Preprint/Report
et al
Measurement of the $CP$-violating phase $\phi_s$ in $B^0_s \to J/\psi\phi$ decays in ATLAS at 13 TeV
[arXiv:2001.07115; CERN-EP-2019-218]
 GO
Measurement of the $CP$-violating phase $\phi_s$ in $B^0_s \to J/\psi\phi$ decays in ATLAS at 13 TeV
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2020-01-27
09:54
OpenAccess [PUBDB-2020-00553] Preprint/Report
et al
Search for the $HH \rightarrow b \bar{b} b \bar{b}$ process via vector-boson fusion production using proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
[arXiv:2001.05178; CERN-EP-2019-267]
 GO
Search for the $HH \rightarrow b \bar{b} b \bar{b}$ process via vector-boson fusion production using proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
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2020-01-27
09:43
OpenAccess [PUBDB-2020-00552] Preprint/Report
et al
Longitudinal flow decorrelations in Xe+Xe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44$ TeV with the ATLAS detector
[arXiv:2001.04201; CERN-EP-2019-275]
 GO
The first measurement of longitudinal decorrelations of harmonic flow amplitudes $v_n$ for $n=2$, 3 and 4 in Xe+Xe collisions at $\sqrt{s_{\mathrm{NN}}}=5.44$ TeV is obtained using 3~${\mu}\textrm{b}^{-1}$ of data with the ATLAS detector at the LHC. The decorrelation signal for $v_3$ and $v_4$ is found to be nearly independent of collision centrality and transverse momentum ($p_{\mathrm{T}}$) requirements on final-state particles, but for $v_2$ a strong centrality and $p_{\mathrm{T}}$ dependence is seen. [...]
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2020-01-23
14:22
OpenAccess [PUBDB-2020-00521] Preprint/Report
et al
The transverse momentum spectrum of low mass Drell-Yan production at next-to-leading order in the parton branching method
[DESY 20-006; arXiv:2001.06488]
 GO
The transverse momentum spectrum of low mass Drell-Yan (DY) production at low center-of-mass energies $\sqrt{s}$ is calculated by applying transverse momentum dependent (TMD) parton distributions obtained from the Parton Branching (PB) evolution method, combined with the next-to-leading-order (NLO) calculation of the hard process in the MCatNLO method. We compare our predictions with experimental measurements at low DY mass, and find very good agreement. [...]
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2020-01-22
11:30
OpenAccess [PUBDB-2020-00461] Preprint/Report
et al
Search for direct top squark pair production in events with one lepton, jets, and missing transverse momentum at 13 TeV with the CMS experiment
[arXiv:1912.08887; CMS-SUS-19-005; CMS-SUS-19-009; CERN-EP-2019-233]
 GO
A search for direct top squark pair production is presented. The search is based on proton-proton collision data at a center-of-mass energy of 13 TeV recorded by the CMS experiment at the LHC during 2016, 2017, and 2018, corresponding to an integrated luminosity of 137 fb$^{-1}$. [...]
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2020-01-22
11:28
OpenAccess [PUBDB-2020-00459] Preprint/Report
et al
Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at $\sqrt{s}=$ 13 TeV
[arXiv:1912.09540; CMS-TOP-15-018; CERN-EP-2019-270]
 GO
The parton-level top quark (t forward-backward asymmetry and the anomalous chromoelectric ($\hat{d}_\mathrm{t}$) and chromomagnetic ($\hat{\mu}_\mathrm{t}$) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb$^{-1}$. The linearized variable $A_\mathrm{FB}^{(1)}$ is used to approximate the asymmetry. [...]
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2020-01-22
11:23
OpenAccess [PUBDB-2020-00457] Preprint/Report
et al
A deep neural network to search for new long-lived particles decaying to jets
[arXiv:1912.12238; CMS-EXO-19-011; CERN-EP-2019-281]
 GO
A tagging algorithm to identify jets that are significantly displaced from the proton-proton (pp) collision region in the CMS detector at the LHC is presented. Displaced jets can arise from the decays of long-lived particles (LLPs), which are predicted by several theoretical extensions of the standard model. [...]
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2020-01-22
11:20
OpenAccess [PUBDB-2020-00456] Preprint/Report
et al
Search for an excited lepton that decays via a contact interaction to a lepton and two jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV
[arXiv:2001.04521; CMS-EXO-18-013; CERN-EP-2019-280]
 GO
Results are presented from a search for events containing an excited lepton (electron or muon) produced in association with an ordinary lepton of the same flavor and decaying to a lepton and two hadronic jets. Both the production and the decay of the excited leptons are assumed to occur via a contact interaction with a characteristic energy scale $\Lambda$. [...]
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