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CERN Published Articles

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2019-03-26
16:11
Magnetic field at Ce impurities in La sites of La0.5Ba0.5MnO3 double perovskites / B. Bosch-Santos ; N. M. Nascimento, M. Saiki, E. L. Correa, T. S. N. Sales, L. F. D. Pereira, G. A. Cabrera-Pasca, R. N. Saxena, J. Schell, and A. W. Carbonari /IS652 Collaboration
Due to its rich variety of electromagnetic properties, such as a colossal magnetoresistance, charge and orbital ordering, and metal-insulator transition, the magnetic behavior in La0.5Ba0.5MnO3 double perovskite compounds has been investigated by several techniques, however more experimental data, especially from atomic resolution techniques, are still necessary to understand such complex behavior. In this paper, we have used a nuclear and short-range technique, the Perturbed Angular Correlation (PAC) spectroscopy, to investigate the magnetic hyperfine interaction at the 140Ce and 111Cd probe nuclei as impurities occupying La sites. [...]
- Published in : AIP Advances 9 (2019) 035245

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2019-03-26
08:11
QCD at forward rapidity, in ultra-peripheral collisions, and multi-parton interactions / Kryshen, Evgeny (St. Petersburg, INP) /ALICE ; ATLAS ; CMS ; LHCb
The LHC is a unique laboratory to perform studies of diffractive processes, photon-induced reactions and multi-parton interactions and explore various aspects of non-perturbative QCD such as Pomeron structure, low-x evolution of parton density functions and the dynamics of hadron collisions at non-perturbative scales. Recent results on these subjects from the ALICE, ATLAS, CMS, LHCb and TOTEM collaborations at the LHC are reviewed..
SISSA, 2018 - 9 p. - Published in : PoS LHCP2018 (2018) 108 Fulltext: PDF; External link: PoS server
In : Sixth Annual Conference on Large Hadron Collider Physics, Bologna, Italy, 4 - 9 Jun 2018, pp.108

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2019-03-26
08:11
Theoretical implications of the 125 GeV Higgs boson / Vryonidou, Eleni (CERN)
I discuss theoretical implications and prospects of LHC Higgs measurements in determining the Higgs couplings and the form of the Higgs potential, as well as exploring beyond the Standard Model scenarios predicting new states..
SISSA, 2018 - 8 p. - Published in : PoS LHCP2018 (2018) 098 Fulltext: PDF; External link: PoS server
In : Sixth Annual Conference on Large Hadron Collider Physics, Bologna, Italy, 4 - 9 Jun 2018, pp.098

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2019-03-26
08:11
Phase I and II Upgrades of the ATLAS Muon Spectrometer with Integrated Small Diameter Drift Tube Chambers and Thin-Gap Resistive Plate Chambers / Walbrecht, Verena Maria (Munich, Max Planck Inst.) /ATLAS Muon
The ATLAS muon spectrometer comprises excellent muon trigger capabilities and high muon momentum resolution up to the TeV scale. Yet, in a small region between the barrel and end-cap parts of the muon spectrometer, a non-negligible muon trigger rate from charged particles not emerging from the pp interaction point has been observed.To prevent such fake triggers, the end of the inner ring of the muon spectrometer barrel in the barrel end-cap transition region, which is currently not equipped with trigger chambers, will be instrumented with resistive platechambers (RPCs) in the next long shutdown of the LHC in 2019 and 2020. [...]
SISSA, 2018 - 5 p. - Published in : PoS LHCP2018 (2018) 083 Fulltext: PDF; External link: PoS server
In : Sixth Annual Conference on Large Hadron Collider Physics, Bologna, Italy, 4 - 9 Jun 2018, pp.083

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2019-03-26
08:11
Antideuteron sensitivity studies at LHCb / Baker, Sophie Katherine (Imperial Coll., London) /LHCb
Preliminary studies into the potential measurement of the (anti)deuteron production cross-section in proton-proton collisions at LHCb are presented. The expected (anti)deuteron yield is seen to be low relative to other charged tracks, but the excellent particle identification capabilities of LHCb may ensure that a measurement is possible..
SISSA, 2018 - 5 p. - Published in : PoS LHCP2018 (2018) 078 Fulltext: PDF; External link: PoS server
In : Sixth Annual Conference on Large Hadron Collider Physics, Bologna, Italy, 4 - 9 Jun 2018, pp.078

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2019-03-26
08:11
Comparison studies for b tagging variables in data and simulation / Paspalaki, Garyfallia (Democritos Nucl. Res. Ctr.) /CMS
The identification of jets originated from b quarks is crucial for a broad range of physics analyses. Various b tagging algorithms exist at CMS and are further developed with the use of the machine learning techniques. [...]
SISSA, 2018 - 5 p. - Published in : PoS LHCP2018 (2018) 077 Fulltext: PDF; External link: PoS server
In : Sixth Annual Conference on Large Hadron Collider Physics, Bologna, Italy, 4 - 9 Jun 2018, pp.077

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2019-03-26
08:11
The Level-1 CMS electron and photon trigger for the LHC Run II / Kontaxakis, Pantelis (Athens Natl. Capodistrian U.) /CMS
The CMS experiment implements a sophisticated two-level triggering system composed of the Level-1, instrumented by custom-design hardware boards, and a software High Level Trigger. A new Level-1 trigger architecture with improved performance is now being used to maintain high physics efficiency for the more challenging conditions experienced during Run II. [...]
SISSA, 2018 - 6 p. - Published in : PoS LHCP2018 (2018) 073 Fulltext: PDF; External link: PoS server
In : Sixth Annual Conference on Large Hadron Collider Physics, Bologna, Italy, 4 - 9 Jun 2018, pp.073

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2019-03-26
08:11
The CMS ECAL data acquisition system and its performance at LHC Run 2 / Mapelli, Dario (Milan Bicocca U.) /CMS
In 2017 the Large Hadron Collider at CERN has provided an astonishing 50 fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of 13 TeV. The CMS detector has been able to record about 90\% of this data. [...]
SISSA, 2018 - 5 p. - Published in : PoS LHCP2018 (2018) 069 Fulltext: PDF; External link: PoS server
In : Sixth Annual Conference on Large Hadron Collider Physics, Bologna, Italy, 4 - 9 Jun 2018, pp.069

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2019-03-26
08:11
Measurements of properties of the Higgs boson in the four-lepton final state at $\sqrt s =$ 13 TeV / Kovac, Marko (Split Tech. U.) /CMS
The H $\to$ ZZ $\to$ 4$\ell$ decay channel ($\ell = e, \mu$) is one of the most important channels for studies of properties of the Higgs boson since it has a large signal-to-background ratio due to the complete reconstruction of the final state decay objects and excellent lepton momentum resolution. Measurements performed using this decay channel and Run 1 data include, among others, the determination of the mass, spin-parity, and width of the new boson as well as tests for anomalous HVV couplings. [...]
SISSA, 2018 - 4 p. - Published in : PoS LHCP2018 (2018) 067 Fulltext: PDF; External link: PoS server
In : Sixth Annual Conference on Large Hadron Collider Physics, Bologna, Italy, 4 - 9 Jun 2018, pp.067

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2019-03-26
08:11
CP violation in $B^{0}_{(s)}\rightarrow h^{+}h^{-}$ / Fazzini, Davide (INFN, Milan Bicocca ; Milan U.) /LHCb
An important test of the Standard Model is represented by the charmless charged two-body $b$-hadron decays to final states with kaons and pions. In fact the $C\!P$ asymmetries measured using these decays are sensitive to new physics beyond the Standard Model since the decay amplitudes receive contributions from loop-level diagrams with magnitudes similar to those from tree-level transitions.We report the most recent results on the charmless \textit{b}-hadron two-body decays obtained by the LHCb experiment using the data collected in Run~1 (3 fb$^{-1}$)..
SISSA, 2018 - 5 p. - Published in : PoS LHCP2018 (2018) 063 Fulltext: PDF; External link: PoS server
In : Sixth Annual Conference on Large Hadron Collider Physics, Bologna, Italy, 4 - 9 Jun 2018, pp.063

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