CERN Accelerating science

CERN Preprints

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2019-03-22
10:05
The High-Luminosity Large Hadron Collider / Bruning, Oliver (CERN) ; Rossi, Lucio (CERN)
Oliver Brüning and Lucio Rossi discuss an upgrade of the Large Hadron Collider (LHC), the High-Luminosity LHC (HL-LHC), which aims to significantly increase the luminosity..
CERN-ACC-2019-0039.
- 2019. - 3 p.

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2019-03-22
09:21
Search for lepton-universality violation in $B^+\to K^+\ell^+\ell^-$ decays
A measurement of the ratio of branching fractions of the decays $B^+\to K^+\mu^+\mu^-$ and $B^+\to K^+e^+e^-$ is presented. [...]
CERN-EP-2019-043 ; LHCB-PAPER-2019-009.
- 2019.
Full text - Related data file(s) - Supplementary information

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2019-03-22
04:28
Stimulated emission of relic gravitons and their super-Poissonian statistics / Giovannini, Massimo (CERN ; INFN, Milan Bicocca)
The degree of second-order coherence of the relic gravitons produced from the vacuum is super-Poissonian and larger than in the case of a chaotic source characterized by a Bose-Einstein distribution. [...]
arXiv:1903.03796.
- 11 p.
Fulltext

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2019-03-22
04:28
Light and strange quark masses from $N_f=2+1$ simulations with Wilson fermions / Bruno, M. (CERN) ; Campos, I. (Cantabria Inst. of Phys.) ; Koponen, J. (INFN, Rome2) ; Pena, C. (Madrid, Autonoma U.) ; Preti, D. (INFN, Turin) ; Ramos, A. (Trinity Coll., Dublin) ; Vladikas, A. (INFN, Rome2)
We present a nearly final analysis of the $u/d$ and $s$ quark masses, extracted using the PCAC quark masses reported in [PRD 95 (2017) 074504]. [...]
arXiv:1903.04094.
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2019-03-22
04:28
Spin Physics with a fixed-target experiment at the LHC / Echevarria, M.G. (INFN, Pavia) ; Brodsky, S.J. (SLAC) ; Cavoto, G. (INFN, Rome ; Rome U.) ; Da Silva, C. (Los Alamos) ; Donato, F. (INFN, Turin ; Turin U.) ; Ferreiro, E.G. (Santiago de Compostela U.) ; Hadjidakis, C. (Orsay, IPN) ; Hřivnácová, I. (Orsay, IPN) ; Kikoła, D. (Warsaw U. of Tech.) ; Klein, A. (Los Alamos) et al.
The multi-TeV proton and ion beams of the LHC would allow for the most energetic fixed-target experiment ever. [...]
arXiv:1903.03379.
- 6 p.
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2019-03-21
08:49
Observation of $C\!P$ violation in charm decays
A search for charge-parity ($C\!P$) violation in $D^0 \to K^- K^+$ and $D^0 \to \pi^- \pi^+$ decays is reported, using $pp$ collision data corresponding to an integrated luminosity of 6 $\mathrm{fb}^{-1}$ collected at a center-of-mass energy of 13 TeV with the LHCb detector. [...]
CERN-EP-2019-042 ; LHCB-PAPER-2019-006.
- 2019.
Fulltext - Related data file(s) - Supplementary information

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2019-03-21
04:03
Probing the trilinear Higgs boson coupling in di-Higgs production at NLO QCD including parton shower effects / Heinrich, G. (Munich, Max Planck Inst.) ; Jones, S.P. (CERN) ; Kerner, M. (Zurich U.) ; Luisoni, G. (Munich, Max Planck Inst.) ; Scyboz, L. (Munich, Max Planck Inst.)
We present results for Higgs boson pair production with variations of the trilinear Higgs boson self-coupling at next-to-leading order (NLO) in QCD including the full top quark mass dependence. [...]
arXiv:1903.08137 ; CERN-TH-2019-028 ; MPP-2019-50 ; ZU-TH-09/19.
- 20 p.
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2019-03-21
04:03
The $\hat{H}$-Parameter: An Oblique Higgs View / Englert, Christoph ; Giudice, Gian F. ; Greljo, Admir ; McCullough, Matthew
We study, from theoretical and phenomenological angles, the Higgs boson oblique parameter $\hat{H}$, as the hallmark of off-shell Higgs physics. [...]
arXiv:1903.07725 ; CERN-TH-2019-027 ; DAMTP-2019-8.
- 26 p.
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2019-03-21
04:03
Thermal Quarkonium Mass Shift from Euclidean Correlators / Eller, Alexander M. ; Ghiglieri, Jacopo ; Moore, Guy D.
Brambilla, Escobedo, Soto, and Vairo have derived an effective description of quarkonium with two parameters; a momentum diffusion term and a real self-energy term. [...]
arXiv:1903.08064 ; CERN-TH-2019-025.
- 5 p.
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2019-03-20
13:28
Calibration and performance of the CMS electromagnetic calorimeter during the LHC Run II / Dimova, Tatyana (Novosibirsk State U.) /CMS Collaboration
Many physics analyses using the Compact Muon Solenoid (CMS) detector at the LHC require accurate, high resolution electron and photon energy measurements. Excellent energy resolution is crucial for studies of Higgs boson decays with electromagnetic particles in the final state, as well as searches for very high mass resonances decaying to energetic photons or electrons. [...]
CMS-CR-2018-377.- Geneva : CERN, 2018 - 8 p. Fulltext: PDF;
In : Sixt International Conference " Engineering of Scintillation Materials and Radiation Technologies", Minsk, Belarus, 26 - 30 Sep 2016

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