# CERN Accelerating science

The Preprints collection aims to cover as far as possible all the grey literature in particle physics and its related technologies. The collection contains something like 400,000 documents, out of which about 50% can be accessed electronically. The documents originate from a variety of institutes all over the world. The collection, currently available, starts in 1979 and it has a full coverage of the arXiv.org e-Print archive since its beginning in 1991.

# Preprints

2019-09-22
05:30
 Deciphering the AMS cosmic-ray positron flux / De Rújula, A. (CERN ; Madrid, IFT) The flux of cosmic-ray high-energy positrons has recently been measured by AMS with unprecedented precision. [...] arXiv:1909.01277. - 6 p. Fulltext

2019-09-22
05:30
 $P_c$ Photo-production And Decay / Rossi, Giancarlo (CERN ; INFN, Rome) ; Veneziano, Gabriele (CERN ; College de France) The 2015 LHCb discovery of a structure (denoted by $P_c^+$) decaying in $J/\psi \,p$ and conjectured to be a penta-quark state, has triggered a renewed interest in the question of possible existence of multi-quark states not predicted by the naive quark model. [...] arXiv:1909.01753. - 6 p. Fulltext

2019-09-20
22:59
 Search for direct production of electroweakinos in final states with one lepton, missing transverse momentum and a Higgs boson decaying into two $b$-jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector The results of a search for electroweakino pair production $pp \rightarrow \tilde\chi^\pm_1 \tilde\chi^0_2$ in which the chargino ($\tilde\chi^\pm_1$) decays into a $W$ boson and the lightest neutralino ($\tilde\chi^0_1$), while the heavier neutralino ($\tilde\chi^0_2$) decays into the Standard Model 125 GeV Higgs boson and a second $\tilde\chi^0_1$ are presented. [...] CERN-EP-2019-188. - 2019. Fulltext - Previous draft version

2019-09-20
04:52
 Measurements of hadron production in $\pi^{+}$ + C and $\pi^{+}$ + Be interactions at 60 GeV/$c$ / NA61/SHINE Collaboration Precise knowledge of hadron production rates in the generation of neutrino beams is necessary for accelerator-based neutrino experiments to achieve their physics goals. [...] arXiv:1909.06294. - Fulltext

2019-09-20
04:52
 Recent QCD results from the xFitter project: Probing the strange content of the proton with charm production in charged current at LHeC / xFitter Developers Team Collaboration We investigate charm production in charged-current deep-inelastic scattering (DIS) using the xFitter program. [...] arXiv:1909.00451. - 7 p. Fulltext

2019-09-19
21:37
 Running of the top quark mass from proton-proton collisions at ${\sqrt{s}} =$ 13 TeV The running of the top quark mass is experimentally investigated for the first time. [...] CERN-EP-2019-189 ; CMS-TOP-19-007-003. - 2019. Additional information for the analysis - CMS AuthorList - Fulltext

2019-09-19
07:44
 Search for squarks and gluinos in final states with same-sign leptons and jets using 139 fb$^{-1}$ of data collected with the ATLAS detector / ATLAS Collaboration A search for supersymmetric partners of gluons and quarks is presented, involving signatures with jets and either two isolated leptons (electrons or muons) with the same electric charge, or at least three isolated leptons. [...] arXiv:1909.08457 ; CERN-EP-2019-161. - 2019. - 42 p. Fulltext - Previous draft version - Fulltext

2019-09-18
05:21
 Beam impact tests of a prototype target for the Beam Dump Facility at CERN: experimental setup and preliminary analysis of the online results / Lopez Sola, E. (CERN) ; Calviani, M. (CERN) ; Aberle, O. (CERN) ; Ahdida, C. (CERN) ; Avigni, P. (CERN) ; Battistin, M. (CERN) ; Bianchi, L. (CERN) ; Burger, S. (CERN) ; Busom Descarrega, J. (CERN) ; Canhoto Espadanal, J. (CERN) et al. The Beam Dump Facility (BDF) is a project for a new facility at CERN dedicated to high intensity beam dump and fixed target experiments. [...] arXiv:1909.07094. - Fulltext

2019-09-18
05:20
 New Results from the Cosmic-Ray Program of the NA61/SHINE facility at the CERN SPS / Unger, Michael The NA61/SHINE experiment at the SPS accelerator at CERN is a unique facility for the study of hadronic interactions at fixed target energies. [...] arXiv:1909.07136. - Fulltext

2019-09-18
05:20
 Study of $\pmb{R_{\rm AA}}$ and $\pmb{v_2}$ of non-strange D mesons and D-jet production in Pb-Pb collisions with ALICE / Grosa, Fabrizio Heavy quarks are sensitive probes of the colour-deconfined medium formed in ultra-relativistic heavy-ion collisions, the Quark-Gluon Plasma (QGP). [...] arXiv:1909.06562. - 6 p. Fulltext

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