# EP Preprints

2020-11-25
14:42
 Measurement of the CKM angle $\gamma$ and $B_s^0-\overline{B_s^0}$ mixing frequency with $B_s^0 \to D_s^{\mp} h^{\pm} \pi^{\pm}\pi^{\mp}$ decays / LHCb Collaboration The CKM angle $\gamma$ is measured for the first time from mixing-induced $CP$ violation between $B^0_s \rightarrow D_s^\mp K^\pm \pi^\pm \pi^\mp$ and $\bar{B}^0_s \rightarrow D_s^\pm K^\mp \pi^\mp \pi^\pm$ decays reconstructed in proton-proton collision data corresponding to an integrated luminosity of 9 ${\rm fb}^{-1}$ recorded with the LHCb detector. [...] arXiv:2011.12041 ; CERN-EP-2020-214 ; LHCB-PAPER-2020-030. - 2020. Fulltext - Related data file(s) - Supplementary information - Fulltext

2020-11-23
08:58
 Stochastic cooling pickup/kicker developments for the High-precision Spectrometer Ring in the HIAF Project at IMP / Caspers, Fritz (European Scientific Institute (FR) ; CERN) ; et al. Stochastic cooling of the Spectrometer Ring (SRing) at the High Intensity heavy-ion Accelerator Facility (HIAF) project in China, which is used mainly for experiments with radioactive fragment beams, is applied to speed up the cooling process of a stored ion beam. [...] CERN-OPEN-2020-014. - 2020. - 12 p. Preprint

2020-11-20
14:06
 CERN Open Data Policy for the LHC Experiments This document defines the Open Data policy for the large LHC experiments (ALICE, ATLAS, CMS and LHCb). [...] CERN-OPEN-2020-013. - 2020. - 2 p. Fulltext

2020-11-19
11:30
 Observation of a new excited $D_s^+$ meson in $B^0\to D^+D^-K^+\pi^-$ decays / LHCb Collaboration Using $pp$ collision data corresponding to an integrated luminosity of $5.4\,{\rm fb}^{-1}$ collected with the LHCb detector at a centre-of-mass energy of $13\,{\rm TeV}$, the $B^0\to D^+D^-K^+\pi^-$ decay is studied. [...] arXiv:2011.09112 ; CERN-EP-2020-203 ; LHCb-PAPER-2020-034 ; LHCB-PAPER-2020-034. - 2020. Fulltext - Related data file(s) - Supplementary information

2020-11-18
11:57
 Theoretical and experimental status of rare charm decays / Mitzel, Dominik Stefan (CERN) ; Gisbert, Hector (Technische Universitaet Dortmund (DE)) ; Golz, Marcel (Technische Universitaet Dortmund (DE) Rare charm decays offer the unique possibility to explore flavour-changing neutral-currents in the up-sector within the Standard Model and beyond. [...] arXiv:2011.09478 ; DO-TH 20/13 ; CERN-OPEN-2020-012. - 2020. - 35 p. Preprint - Fulltext

2020-11-16
14:11
 Search for the rare decay $B^0 \to J/\psi\phi$ / LHCb Collaboration A search for the rare decay $B^{0} \rightarrow J/\psi \phi$ is performed using $pp$ collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 ${\rm fb}^{-1}$. [...] arXiv:2011.06847 ; LHCb-PAPER-2020-033 ; CERN-EP-2020-204 ; LHCB-PAPER-2020-033. - 2020. Fulltext - Related data file(s) - Supplementary information

2020-11-11
11:00
 Search for heavy neutral leptons in $W^+ \to \mu^+ \mu^{\pm} jet$ decays / LHCb Collaboration A search is performed for heavy neutrinos in the decay of a $W$ boson into two muons and a jet. [...] arXiv:2011.05263 ; LHCb-PAPER-2020-022 ; CERN-EP-2020-194 ; LHCB-PAPER-2020-022. - 2020. - 24 p, 24 p. Fulltext - Related data file(s) - Supplementary information - Fulltext

2020-11-05
15:52
 Study of $B_s^0 \to J/\psi \pi^+ \pi^- K^+ K^-$ decays / LHCb Collaboration The decays $B^0_s \rightarrow J/\psi \pi^+\pi^- K^+ K^-$ are studied using a data set corresponding to an integrated luminosity of 9 fb$^{-1}$, collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV [...] arXiv:2011.01867 ; LHCb-PAPER-2020-35 ; CERN-EP-2020-192 ; LHCB-PAPER-2020-035. - 2020. - 34 p. Fulltext - Related data file(s) - Supplementary information - Fulltext

2020-11-03
12:13
 Observation of new excited $B_s^0$ states / LHCb Collaboration A structure is observed in the $B^+K^-$ mass spectrum in a sample of proton--proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, collected with the LHCb detector and corresponding to a total integrated luminosity of 9 fb${}^-1$. [...] arXiv:2010.15931 ; LHCb-PAPER-2020-026 ; CERN-EP-2020-185 ; LHCB-PAPER-2020-026. - 2020. - 17 p. Fulltext - Related data file(s) - Supplementary information - Fulltext

2020-10-28
10:53
 Observation of a new $\Xi_b^0$ state / LHCb Collaboration Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5~fb$^{-1}$, the observation of a new excited $\Xi_b^0$ resonance decaying to the $\Xi_b^-\pi^+$ final state is presented. [...] arXiv:2010.14485 ; LHCb-PAPER-2020-032 ; CERN-EP-2020-190 ; LHCB-PAPER-2020-032. - 2020. - 27 p. Fulltext - Related data file(s) - Fulltext - Supplementary information