# CERN Preprints

Posledne pridané:
2019-10-22
16:33
 Measurement of $f_s / f_u$ variation with proton-proton collision energy and kinematics The ratio of the $B^0_s$ and $B^+$ fragmentation fractions $f_s$ and $f_u$ is studied with $B^0_s \to J/\psi \phi$ and $B^+ \to J/\psi K^+$ decays using data collected by the LHCb experiment in proton-proton collisions at 7, 8 and 13 TeV center-of-mass energies [...] CERN-EP-2019-209 ; LHCB-PAPER-2019-020. - 2019. Fulltext - Previous draft version - Related data file(s)

2019-10-22
10:33
 Search for standard model production of four top quarks / Fangmeier, Caleb Arthur (Nebraska U.) /CMS Collaboration This talk describes efforts towards a first measurement of the standard model production of four top quarks with results based on up to the full Run 2 dataset. It includes implications of this measurement to constrain properties of the Higgs Boson and new physics scenarios including dark matter.. CMS-CR-2019-170.- Geneva : CERN, 2019 - 6 p. Fulltext: PDF; In : 2019 Meeting of the Division of Particles & Fields of the American Physical Society, Boston, United States Of America, 29 Jul - 2 Aug 2019

2019-10-22
04:09
 Quantized Coulomb Branches, Monopole Bubbling and Wall-Crossing Phenomena in 3d $\mathcal{N}=4$ Theories / Assel, Benjamin (CERN) ; Cremonesi, Stefano (Durham U., Dept. of Math.) ; Renwick, Matthew (Durham U., Dept. of Math.) To study the quantized Coulomb branch of 3d $\mathcal{N}=4$ unitary SQCD theories, we propose a new method to compute correlators of monopole and Casimir operators that are inserted in the $\mathbb{R}\times\mathbb{R}^2_\epsilon$ Omega background. [...] arXiv:1910.01650. - 73 p. Fulltext

2019-10-22
04:09
 Emergent Strings from Infinite Distance Limits / Lee, Seung-Joo (CERN) ; Lerche, Wolfgang (CERN) ; Weigand, Timo (CERN ; U. Mainz, PRISMA) As a refinement of the Swampland Distance Conjecture, we propose that a quantum gravitational theory in an infinite distance limit of its moduli space either decompactifies, or reduces to an asymptotically tensionless, weakly coupled string theory. [...] arXiv:1910.01135 ; CERN-TH-2019-159. - 96 p. Fulltext

2019-10-21
18:55
 Evidence for electroweak production of two jets in association with a $Z\gamma$ pair in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector Evidence for electroweak production of two jets in association with a $Z\gamma$ pair in $\sqrt{s} = 13$ TeV proton-proton collisions at the Large Hadron Collider is presented. [...] CERN-EP-2019-206. - 2019. Fulltext - Previous draft version

2019-10-21
15:32
 The Hardware of the Video Observation System / Heinze, W CERN-PS-CO-Note-2002-011-Tech. - 2002. - 8 p. Full text

2019-10-20
11:00
 Bose-Einstein correlations of charged hadrons in proton-proton collisions at $\sqrt{s} =$ 13 TeV Bose-Einstein correlations of charged hadrons are measured over a broad multiplicity range, from a few particles up to about 250 reconstructed charged hadrons in proton-proton collisions at $\sqrt{s} =$ 13 TeV. [...] CERN-EP-2019-151 ; CMS-FSQ-15-009-003. - 2019. Additional information for the analysis - CMS AuthorList - Fulltext

2019-10-19
22:35
 Measurement of the $t\bar{t}$ production cross-section and lepton differential distributions in $e\mu$ dilepton events from $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector The inclusive top quark pair ($t\bar{t}$) production cross-section $\sigma_{t\bar{t}}$ has been measured in proton-proton collisions at $\sqrt{s}=13$ TeV, using $36.1$ fb$^{-1}$ of data collected in 2015-16 by the ATLAS experiment at the LHC. [...] CERN-EP-2019-203. - 2019. Fulltext - Previous draft version

2019-10-19
20:21
 Mixed higher-order anisotropic flow and nonlinear response coefficients of charged particles in PbPb collisions at ${\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}} =$ 2.76 and 5.02 TeV Anisotropies in the initial energy density distribution of the quark-gluon plasma created in high energy heavy ion collisions lead to anisotropies in the azimuthal distributions of the final-state particles known as collective flow. [...] CERN-EP-2019-211 ; CMS-HIN-17-005-003. - 2019. Additional information for the analysis - CMS AuthorList - Fulltext

2019-10-18
18:01
 Search for new resonances in mass distributions of jet pairs using 139 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration A search for new resonances decaying into a pair of jets is reported using the dataset of proton-proton collisions recorded at $\sqrt{s}=13$ TeV with the ATLAS detector at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of 139 fb$^{-1}$. [...] arXiv:1910.08447 ; CERN-EP-2019-162. - 2019. - 39 p, 39 p. Fulltext - Previous draft version - Fulltext