CERN Accelerating science

Published Articles

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2020-01-15
15:30
Beam test performance of the highly granular SiW-ECAL technological prototype for the ILC / Irles, A. (CNRS-LAL) ; Kawagoe, K. (Kyushu University) ; Miura, Y. (Kyushu University) ; Sekiya, I. (Kyushu University) ; Suehara, T. (Kyushu University) ; Yoshioka, T. (Kyushu University) ; Bilokin, S. (CNRS-IPHC) ; Bonis, J. (CNRS-LAL) ; Cornebise, P. (CNRS-LAL) ; Gallas, A. (CNRS-LAL) et al.
The technological prototype of the CALICE highly granular silicon-tungsten electromagnetic calorimeter (SiW-ECAL)was tested in a beam at DESY in 2017. The setup comprised seven layers of silicon sensors. [...]
AIDA-2020-PUB-2020-001.- Geneva : CERN, 2020 - Published in : Nucl.Instrum.Meth. A Fulltext: PDF;

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2020-01-15
06:01
Theory of rare kaon decays / D'Ambrosio, Giancarlo (INFN, Naples)
I review rare kaon decays in the LHC era: we discuss interplay with B-anomalies and possible New Physics in direct CP violation in $K → 2π$: very rare kaon decays like $K → πν\overline{ν}$ are very important to this purpose We discuss also the decays $K^0 → μ^+ μ^−$ due to the LHCB measurement..
2018 - 4 p. - Published in : (2018) , pp. 319-322
In : 53rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 17 - 24 Mar 2018, pp.319-322

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2020-01-15
06:01
Precision measurement of the form factors of semileptonic charged kaon decays from NA48/2 / Shkarovskiy, S (Dubna, JINR) ; Anzivino, G ; Arcidiacono, R ; Baldini, W ; Balev, S ; Batley, J R ; Behler, M ; Bifani, S ; Biino, C ; Bizzeti, A et al. /NA48/2
We present a measurement of the charged kaon semileptonic form factors based on 4.3 million $K^± → π^0 e^± \nu_e$ and 2.9 million $K^± → π^0 μ^± \nu_μ$ decays collectedby the NA48/2 experiment. The single results for the semi-electronic and semi-muonic channel have better and similar precision, respectively, than previousmeasurements. [...]
2018 - 4 p. - Published in : (2018) , pp. 315-318
In : 53rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 17 - 24 Mar 2018, pp.315-318

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2020-01-15
06:01
Computing Planar Five-Gluon Amplitudes with Numerical Unitarity / Abreu, Samuel (Freiburg U.) ; Febres Cordero, Fernando (Freiburg U.) ; Ita, Harald (Freiburg U.) ; Page, Ben (Freiburg U.) ; Zeng, Mao (UCLA)
We discuss the numerical unitarity method for the computation of two-loop scattering amplitudes relevant for LHC phenomenology. We extend one-loop technologies by making use of novel ideas such as a geometric construction of surface terms and finite field numerics. [...]
2018 - 4 p. - Published in : (2018) , pp. 241-244
In : 53rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 17 - 24 Mar 2018, pp.241-244

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2020-01-15
06:01
Search for dark photons at NA62 / Mirra, Marco (Naples U.) ; Aliberti, R ; Ambrosino, F ; Ammendola, R ; Angelucci, B ; Antonelli, A ; Anzivino, G ; Arcidiacono, R ; Barbanera, M ; Biagioni, A et al. /NA62
Fixed target experiments are a particularly useful tool in the search of very weakly coupled particles in the MeV-GeV range that could represent the mediators of a number of portals to a hidden sector, an example being the dark photon. The NA62 experiment at the CERN SPS is currently taking data. [...]
2018 - 4 p. - Published in : (2018) , pp. 185-188
In : 53rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 17 - 24 Mar 2018, pp.185-188

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2020-01-15
06:01
The doubly charged scalar: current status and perspectives / Ghezzi, Margherita (PSI, Villigen)
The minimal extension of the Standard Model consisting in a doubly charged SU(2)-singlet scalar is theoretically well motivated by a mechanism ofgeneration of the neutrino masses. As this particle allows for lepton flavourviolation, the model is partially constrained by low energy flavour physics.Limits on the mass are also set by direct searches at LHC. [...]
2018 - 7 p. - Published in : (2018) , pp. 159-165
In : 53rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 17 - 24 Mar 2018, pp.159-165

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2020-01-15
06:01
Searches for exotic Higgs bosons with the ATLAS and CMS experiments / Raspereza, A (DESY)
This note presents searches for a light pseudoscalar boson produced in decays of the 125 GeV Higgs boson, and for a doubly charged Higgs boson, performed by the ATLAS and CMS collaborations using run-2 LHC data collected at a center-of-mass energy of 13 TeV..
2018 - 4 p. - Published in : (2018) , pp. 135-138
In : 53rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 17 - 24 Mar 2018, pp.135-138

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2020-01-15
06:01
Explaining the Flavour Anomalies with Leptoquarks / Crivellin, Andreas (PSI, Villigen)
Several experiments observed deviations from the Standard Model (SM) in the flavour sector: LHCb found a 5 $σ$ discrepancy compared to the SM in $b → sμ^+ μ^−$ transitions (including hints for lepton flavour universality violation (LFUV) in $R(K)$ and $R(K*))$. In addition BELLE, BABAR and LHCb founds hints for LFUV in $b →cτ\nu$ transitions at the 4 $σ$ level. [...]
2018 - 4 p. - Published in : (2018) , pp. 93-96
In : 53rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 17 - 24 Mar 2018, pp.93-96

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2020-01-15
06:01
Recent LHCb measurements of $CP$ violation and mixing in beauty and charm / Tellarini, G (INFN, Ferrara)
This document reports an ensemble of recent LHCb measurements of $CP$ violation indifferent $b$-hadron decays. Recent studies of $CP$ violation in the charm sectorand of $D^0$-$\overline{D}^0$ mixing are also presented..
2018 - 4 p. - Published in : (2018) , pp. 61-64
In : 53rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 17 - 24 Mar 2018, pp.61-64

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2020-01-15
06:01
SM higgs production and decay at the LHC / Spira, M (PSI, Villigen)
The recent discovery of the Higgs boson at the LHC marked the completion of the Standard Model of strong and electroweak interactions. I will summarize the theoretical ingredients involved in the production and decay processes at the LHC that allowed for a quite concise picture of the properties of the discovered resonance. [...]
2018 - 4 p. - Published in : (2018) , pp. 11-14
In : 53rd Rencontres de Moriond on QCD and High Energy Interactions, La Thuile, Italy, 17 - 24 Mar 2018, pp.11-14

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