# EP Preprints

2018-12-03
12:30
 Strategic R&D Programme on Experimental Technologies / Aleksa, Martin (CERN) ; Blomer, Jakob (CERN) ; Cure, Benoit (CERN) ; Campbell, Michael ; D'Ambrosio, Carmelo (CERN) ; Dannheim, Dominik (CERN) ; Doser, Michael (CERN) ; Faccio, Federico (CERN) ; Farthouat, Philippe (CERN) ; Gargiulo, Corrado (CERN) et al. Instrumentation is a key ingredient for progress in experimental high energy physics [...] CERN-OPEN-2018-006. - 2018. - 100 p. Preprint

2018-11-22
12:02
 Search for $CP$ violation through an amplitude analysis of $D^0\rightarrow K^+ K^- \pi^+ \pi^-$ decays / LHCb Collaboration A search for $CP$ violation in the Cabibbo-suppressed $D^0\rightarrow K^+ K^- \pi^+ \pi^-$ decay mode is performed using an amplitude analysis. [...] arXiv:1811.08304 ; LHCb-PAPER-2018-041 ; CERN-EP-2018-299 ; LHCB-PAPER-2018-041. - 2018. - 33 p. Fulltext - Related data file(s) - Supplementary information - Additional files - Fulltext

2018-10-22
15:42
 First measurement of charm production in fixed-target configuration at the LHC / LHCb Collaboration The first measurement of heavy-flavour production by the LHCb experiment in its fixed-target mode is presented. [...] arXiv:1810.07907 ; LHCb-PAPER-2018-023 ; CERN-EP-2018-266 ; LHCB-PAPER-2018-023. - 2018. - 21 p. Fulltext - Related data file(s) - Supplementary information - Fulltext

2018-10-18
14:47
 Study of $\Upsilon$ production in $p$Pb collisions at $\sqrt{s_{NN}}=8.16$ TeV / LHCb Collaboration The production of $\Upsilon(nS)$ mesons ($n=1,2,3$) in $p$Pb and Pb$p$ collisions at a centre-of-mass energy per nucleon pair $\sqrt{s_{NN}}=8.16$ TeV is measured by the LHCb experiment, using a data sample corresponding to an integrated luminosity of 31.8 nb$^{-1}$. [...] arXiv:1810.07655 ; LHCb-PAPER-2018-035 ; CERN-EP-2018-267 ; LHCB-PAPER-2018-035. - 2018. - 37 p. Fulltext - Related data file(s) - Fulltext

2018-10-17
15:45
 Measurement of the charm-mixing parameter $y_{CP}$ / LHCb Collaboration A measurement of the charm-mixing parameter $y_{CP}$ using $D^0 \to K^+ K^-$, $D^0 \to \pi^+ \pi^-$, and $D^0 \to K^- \pi^+$ decays is reported. [...] arXiv:1810.06874 ; LHCb-PAPER-2018-038 ; CERN-EP-2018-270 ; LHCB-PAPER-2018-038. - 2018. - 15 p. Figures, tables and other information - Related data file(s) - Supplementary information - Fulltext - Fulltext

2018-10-12
13:40
 Measurement of the branching fractions of the decays $D^+\rightarrow K^-K^+K^+$, $D^+\rightarrow \pi^-\pi^+K^+$ and $D^+_s\rightarrow\pi^-K^+K^+$ / LHCb Collaboration The branching fractions of the doubly Cabibbo-suppressed decays $D^+\rightarrow K^-K^+K^+$, $D^+\rightarrow \pi^-\pi^+K^+$ and $D^+_s\rightarrow\pi^-K^+K^+$ are measured using the decays $D^+\rightarrow K^-\pi^+\pi^+$ and $D^+_s+\rightarrow K^-K^+\pi^+$ as normalisation channels. [...] arXiv:1810.03138 ; LHCb-PAPER-2018-033 ; CERN-EP-2018-244 ; LHCB-PAPER-2018-033. - 2018. - 22 p. Figures, tables and other information - Full text - Related data file(s) - Fulltext

2018-10-05
14:01
 Observation of two resonances in the $\Lambda_b^0 \pi^\pm$ systems and precise measurement of $\Sigma_b^\pm$ and $\Sigma_b^{*\pm}$ properties / LHCb Collaboration The first observation of two structures consistent with resonances in the final states $\Lambda_b^0 \pi^-$ and $\Lambda_b^0 \pi^+$ is reported using samples of $pp$ collision data collected by the LHCb experiment at $\sqrt{s} = 7$ and $8$ TeV, corresponding to an integrated luminosity of 3 $\mathrm{fb}^{-1}$. [...] arXiv:1809.07752 ; LHCb-PAPER-2018-032 ; CERN-EP-2018-243 ; LHCB-PAPER-2018-032. - 2018. - 16 p. Figures, tables and other information - Related data file(s) - Fulltext - Fulltext

2018-09-21
11:55
 Evidence for an $\eta_c(1S) \pi^-$ resonance in $B^0 \to \eta_c(1S) K^+\pi^-$ decays / LHCb Collaboration A Dalitz plot analysis of $B^0 \to \eta_c(1S) K^+\pi^-$ decays is performed using data samples of $pp$ collisions collected with the LHCb detector at centre-of-mass energies of $\sqrt{s}=7,~8$ and $13$ TeV, corresponding to a total integrated luminosity of $4.7 \text{fb}^{-1}$. [...] arXiv:1809.07416 ; LHCb-PAPER-2018-034 ; CERN-EP-2018-245 ; LHCB-PAPER-2018-034. - 2018. - 39 p. Figures, tables and other information - Related data file(s) - Fulltext

2018-08-24
11:51
 Search for lepton-flavour-violating decays of Higgs-like bosons / LHCb Collaboration A search is presented for a Higgs-like boson with mass in the range 45 to 195 GeV/$c^2$ decaying into a muon and a tau lepton. [...] arXiv:1808.07135 ; CERN-EP-2018-210 ; LHCb-PAPER-2018-030 ; LHCB-PAPER-2018-030. - 2018. - 20 p. Figures, tables and other information - Related data file(s) - Fulltext - Fulltext

2018-07-30
16:01
 Measurement of the relative $B^{-} \rightarrow D^{0} / D^{*0} / D^{**0} \mu^{-} \overline{\nu}_\mu$ branching fractions using $B^{-}$ mesons from $\overline{B}{}_{s2}^{*0}$ decays / LHCb Collaboration The decay of the narrow resonance $\overline{B}{}_{s2}^{*0}\!\rightarrow B^- K^+$ can be used to determine the $B^-$ momentum in partially reconstructed decays without any assumptions on the decay products of the $B^-$ meson. [...] arXiv:1807.10722 ; LHCb-PAPER-2018-024 ; CERN-EP-2018-190 ; LHCB-PAPER-2018-024. - 2018. - 27 p. Figures, tables and other information - Related data file(s) - Fulltext - Supplementary information - Fulltext