# CERN Preprints

2021-05-18
11:32
 Search for the doubly charmed baryon ${\it{\Omega}_{cc}^{+}}$ A search for the doubly charmed baryon $\it{\Omega}_{cc}^{+}$ with the decay mode $\it{\Omega}_{cc}^{+}\to\it{\Xi}_c^{+}K^{-}\pi^{+}$ is performed using proton-proton collision data at a centre-of-mass energy of 13$\mathrm{\,Te\kern -0.1em V}$ collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of $5.4\,\mathrm{fb}^{-1}$. [...] arXiv:2105.06841 ; CERN-EP-2021-068 ; LHCB-PAPER-2021-011. - 2021. Fulltext - Related data file(s) - Supplementary information

2021-05-18
08:50
 Evaluation of an SFP Based Test Loop for a Future Upgrade of the Optical Transmission for CERN’s Beam Interlock System / Secondo, Raffaello (CERN) ; Galilée, Marc-Antoine (CERN) ; Garnier, Jean-Christophe (CERN) ; Martin, Christophe (CERN) ; Romera, Iván (CERN) ; Siemko, Andrzej (CERN) ; Uythoven, Jan (CERN) The Beam Interlock System (BIS) is the backbone of CERN’s machine protection system. [...] 2019. - 5 p. Fulltext

2021-05-18
08:50
 The IRRAD Proton Irradiation Facility Control, Data Management and Beam Diagnostic Systems: An Outlook of the Major Upgrades Beyond the CERN Long Shutdown 2 / Ravotti, Federico (CERN) ; Gkotse, Blerina (CERN ; Paris, Ecole des Mines) ; Glaser, Maurice (CERN) ; Jouvelot, Pierre (Paris, Ecole des Mines) ; Mateu, Isidre (CERN) ; Meskova, Viktoria (CERN) ; Pezzullo, Giuseppe (CERN) ; Sallese, Jean-Michel (Ecole Polytechnique, Lausanne) The IRRAD proton irradiation facility at CERN was built during the Long Shutdown 1 (LS1) to address the irradiation experiment needs of the community working for the High-Luminosity (HL) upgrade of the LHC. [...] 2019. - 5 p. Fulltext

2021-05-18
08:39
 Primordial Black Holes from First-Order Cosmological Phase Transitions / Baker, Michael J. ; Breitbach, Moritz ; Kopp, Joachim ; Mittnacht, Lukas We discuss the possibility of forming primordial black holes during a first-order phase transition in the early Universe. [...] arXiv:2105.07481 ; CERN-TH-2021-079 ; MITP-21-023. - 7 p. Fulltext

2021-05-18
08:39
 Flow harmonics in heavy ion physics at CMS and ATLAS / Krintiras, Georgios Konstantinos How can we gain a detailed insight into the hydrodynamic response of the system created in heavy ion collisions to the fluctuating initial geometry and viscous effects? Do we create a strongly interacting medium in proton-nucleus and proton-proton collisions, or rather a system of partons undergoing few scatterings? To what extent can we discriminate between initial momentum correlations and flow generated as a response to the initial geometry via interactions in the final state? Do measurements of identified particle flow confirm the observations from inclusive charged hadrons? An experimental overview of anisotropic flow measurements, ranging from large down to the smallest collision systems, is given in these proceedings.. arXiv:2105.07287. - Fulltext

2021-05-18
08:39
 Recent ALICE results on charm production and hadronisation / Vermunt, Luuk Studies on the production of open charm hadrons are of paramount importance to investigate the charm-quark hadronisation mechanisms at the LHC, particularly through the evolution of the production ratio between different charm-hadron species. [...] arXiv:2105.07154. - Fulltext

2021-05-18
08:38
 Test of lepton flavour universality in $b\to s\ell^+\ell^-$ decays / Moise, R.D. The Standard Model of particle physics predicts that charged leptons have the same electroweak interaction strength. [...] arXiv:2105.06921. - 6 p. Fulltext

2021-05-18
08:38
 On factorisation schemes for the electron parton distribution functions in QED / Frixione, Stefano The electron, positron, and photon Parton Distribution Functions (PDFs) of the unpolarised electron have recently been computed at the next-to-leading logarithmic accuracy in QED, by adopting the $\overline{\rm MS}$ factorisation scheme. [...] arXiv:2105.06688 ; CERN-TH-2021-078. - 30 p. Fulltext

2021-05-18
08:38
 Generalized Abelian Gauge Field Theory under Rotor Model / Wong, B.T.T. (CERN) Gauge field theory is a quantum field theory that describes the interaction of elementary spin-1 particles, of which being massless to preserve gauge symmetry. [...] arXiv:2104.14472. - 11 p. Fulltext

2021-05-17
16:04
 Electronic noise in LAr calorimetry / De la Taille, Christophe (LAL Orsay) RD-3-Note-45. - 1993. - 16 p. Full text