# CERN Preprints

2020-09-29
18:13
 Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at $\sqrt{s} =$ 13 TeV A search is presented for a Higgs boson that is produced via vector boson fusion and that decays to an undetected particle and an isolated photon. [...] CERN-EP-2020-173 ; CMS-EXO-20-005-003. - 2020. Additional information for the analysis - CMS AuthorList - Fulltext

2020-09-29
09:14
 Optimisation of the CLIC positron source at the 1.5 TeV and 3 TeV stages / Zhao, Yongke (CERN, Shandong University (CN)) ; Latina, Andrea (CERN) ; Doebert, Steffen (CERN) ; Schulte, Daniel (CERN) ; Ma, Lianliang (Shandong University (CN)) Positron source is very important for many accelerator experiments. [...] CERN-ACC-2020-0026 ; CLIC-Note-1165. - 2020. - 29 p. Full text

2020-09-29
04:40
 Investigating Hard Splittings via Jet Substructure in pp and Pb-Pb Collisions at $\sqrt{s_{\mathrm{NN}}} = 5.02$ TeV with ALICE / Ehlers, Raymond Jets lose energy as they propagate through the Quark-Gluon Plasma, modifying their parton shower. [...] arXiv:2009.12247. - 4 p. Fulltext

2020-09-28
04:16
 The energy-dependent $\pi^+ \pi^+ \pi^+$ scattering amplitude from QCD / Hansen, Maxwell T. (CERN) ; Briceño, Raul A. (Jefferson Lab ; Old Dominion U.) ; Edwards, Robert G. (Jefferson Lab) ; Thomas, Christopher E. (Cambridge U., DAMTP) ; Wilson, David J. (Cambridge U., DAMTP) Focusing on three-pion states with maximal isospin ($\pi^+\pi^+\pi^+$), we present the first non-perturbative determination of an energy-dependent three-hadron scattering amplitude from first-principles QCD. [...] arXiv:2009.04931. - 22 p. Fulltext

2020-09-27
12:32
 Search for strong electric fields in PbPb collisions at ${\sqrt {\smash [b]{s_{_{\mathrm {NN}}}}}} =$ 5.02 TeV using azimuthal anisotropy of prompt ${\mathrm{D^0}}$ and ${\mathrm{\overline{D}}{}^0}$ mesons The strong Coulomb field created in ultrarelativistic heavy ion collisions is expected to produce a rapidity-dependent difference ($\Delta v_{2}$) in the second Fourier coefficient of the azimuthal distribution (elliptic flow, $v_{2}$) between ${\mathrm{D^0}}$ ($\mathrm{\bar{u}}\mathrm{c}$) and ${\mathrm{\overline{D}}{}^0}$ ($\mathrm{u}\mathrm{\bar{c}}$) mesons. [...] CERN-EP-2020-155 ; CMS-HIN-19-008-003. - 2020. Additional information for the analysis - CMS AuthorList - Fulltext

2020-09-26
06:00
 A Highschooler’s Guide to GeV-Range Electromagnetism / Chatterji, Satchit (Unlisted, IN) ; Desai, Aayush (Unlisted, IN) ; Dwarkesh, Aditya (Unlisted, IN) ; Ganesh, Anushree (Unlisted, IN) ; Kunder, Ameya (Unlisted, IN) ; Malhotra, Pulkit (Unlisted, IN) ; Sahoo, Roshni (Unlisted, IN) ; Shah, Jinal (Unlisted, IN) ; Velmurugan, Kiranbhaskar (Unlisted, IN) ; Joos, Markus (CERN) et al. The following article has been written primarily by the high school students who make up the team “Cryptic Ontics”, one of the two winning teams in the 2018 edition of CERN’s Beamline for Schools (BL4S) competition, and is based on the set of experiments the students endeavoured to conduct over the course of a two-week period at CERN. [...] 2020. Fulltext

2020-09-26
04:14
 Gas Heating from Spinning and Non-Spinning Evaporating Primordial Black Holes / Laha, Ranjan ; Lu, Philip ; Takhistov, Volodymyr Primordial black holes (PBHs) from the early Universe constitute a viable dark matter (DM) candidate and can span many orders of magnitude in mass. [...] arXiv:2009.11837 ; CERN-TH-2020-159. - 7 p. Fulltext

2020-09-26
04:14
 MeV-scale Seesaw and Leptogenesis / Domcke, Valerie ; Drewes, Marco ; Hufnagel, Marco ; Lucente, Michele We study the type-I seesaw model with three right-handed neutrinos and Majorana masses below the pion mass. [...] arXiv:2009.11678 ; CERN-TH-2020-158 ; DESY-20-159. - 25 p. Fulltext

2020-09-26
04:14
 UPC: a powerful tool for ${\mathrm J}/\psi$ photoproduction analysis in ALICE / Ragoni, Simone Ultra-peripheral collisions (UPC) occur when the interacting nuclei or protons have an impact parameter larger than the sum of their radii. [...] arXiv:2009.11724. - 4 p. Fulltext

2020-09-25
04:09
 Optimizing large-scale structure data analysis with the theoretical error likelihood / Chudaykin, Anton ; Ivanov, Mikhail M. ; Simonović, Marko An important aspect of large-scale structure data analysis is the presence of non-negligible theoretical uncertainties, which become increasingly important on small scales. [...] arXiv:2009.10724 ; INR-TH-2020-040 ; CERN-TH-2020-154. - 41 p. Fulltext