# LHCb Conference Contributions

Posledne pridané:
2019-11-14
10:25
 Multiplicity-dependent modification of $\chi_{c1}(3872)$ and $\psi{(2S)}$ production in $pp$ collisions at $\sqrt{s}$= 8 TeV /LHCb Collaboration In $pp$ collisions at $\sqrt{s}$ = 8 TeV, $\chi_{c1}(3872)$ and $\psi{(2S)}$ states are produced promptly at the primary collision vertex or in decays of $b$~hadrons. We study their relative production rates as a function of particle multiplicity. [...] LHCb-CONF-2019-005; CERN-LHCb-CONF-2019-005.- Geneva : CERN, 2019 - 13. Fulltext: figures_CONF_2019_005 - ZIP; LHCb-CONF-2019-005 - PDF; In : The 28th International Conference on Ultra-relativistic Nucleus-Nucleus Collisions, Wuhan, China, 3 - 9 Nov 2019

2019-11-12
08:41
 Measurement of $Z$ production cross-sections in proton-lead collisions at $\sqrt{s_\rm{NN}}=8.16\ \rm{TeV}$ /LHCb Collaboration This document describes a measurement of the $Z\to\mu^+\mu^-$ production cross-sections in proton-lead collisions at a centre-of-mass energy per nucleon pair of $\sqrt{s_\mathrm{NN}}=8.16\ \mathrm{TeV}$, using data collected by the LHCb detector in 2016. The dataset corresponds to an integrated luminosity of $30.8\,\mathrm{nb}^{-1}$, with $12.2\,\mathrm{nb}^{-1}$ for the forward ($p$Pb) configuration and $18.6\,\mathrm{nb}^{-1}$ for the backward (Pb$p$) configuration. [...] LHCb-CONF-2019-003; CERN-LHCb-CONF-2019-003.- Geneva : CERN, 2019 - 16. Fulltext: LHCb-CONF-2019-003 - PDF; Figs_final - ZIP; In : The 28th International Conference on Ultra-relativistic Nucleus-Nucleus Collisions, Wuhan, China, 3 - 9 Nov 2019

2019-11-12
08:38
 Study of prompt $D^0$ meson production in $p$Pb at $\sqrt{s_{\mathrm{NN}}}= 8.16$ TeV at LHCb /LHCb Collaboration The production of prompt $D^0$ mesons in proton-lead collisions in the forward and backward configurations is studied. The data are collected with the LHCb detector at a center-of-mass energy per nucleon pair of $\sqrt{s_{\mathrm{NN}}}= 8.16$ TeV and correspond to an integrated luminosity of $12.2\pm0.3~\mathrm{nb}^{-1}$ ($18.6\pm0.5~\mathrm{nb}^{-1}$) in the forward (backward) configuration. [...] LHCb-CONF-2019-004; CERN-LHCb-CONF-2019-004.- Geneva : CERN, 2019 - 17. Fulltext: LHCb-CONF-2019-004-figures - ZIP; LHCb-CONF-2019-004 - PDF; In : The 28th International Conference on Ultra-relativistic Nucleus-Nucleus Collisions, Wuhan, China, 3 - 9 Nov 2019

2019-09-16
15:22
 Strong constraints on the $K^0_s \to \mu^+ \mu^-$ branching fraction /LHCb Collaboration A search for the decay $K^0_s \to \mu^+ \mu^-$ is performed using proton-proton collision data, corresponding to an integrated luminosity of $5.6 \, \text {fb}^{-1}$, collected with the LHCb experiment during 2016, 2017 and 2018 at a center-of-mass energy of $13\,\mathrm{TeV}$. The observed number of signal decays is consistent with zero, yielding an upper limit of $\mathcal {B}( K^0_s \to \mu^+ \mu^-) < 2.2\,(2.6)\times 10^{-10}$ at $90$ $(95)\% ~\text {CL}$ [...] LHCb-CONF-2019-002; CERN-LHCb-CONF-2019-002.- Geneva : CERN, 2019 - 9. Fulltext: PDF; In : International Conference on Kaon Physics 2019, Perugia, Italy, 10 - 13 Sep 2019

2019-05-17
11:08
 Search for time-dependent $CP$ violation in $D^0 \to K^+ K^-$ and $D^0 \to \pi^+ \pi^-$ decays /LHCb Collaboration A search for charge-parity ($CP$) violation in the time-dependent decay rates of $D^0 \to K^+ K^-$ and $D^0 \to \pi^+ \pi^-$ decays is reported. The data correspond to an integrated luminosity of $1.9\,{\rm fb}^{-1}$ collected by the LHCb detector in 2015--2016 in $pp$ collisions at a centre-of-mass energy of $13\,{\rm TeV}$ [...] LHCb-CONF-2019-001; CERN-LHCb-CONF-2019-001.- Geneva : CERN, 2019 - 29. Fulltext: LHCb-CONF-2019-001 - PDF; LHCb-CONF-2019-001-figs - ZIP;

2018-12-04
10:08
 Prospects for searches for long-lived particles after the LHCb detector upgrades /LHCb Collaboration The LHCb detector is a single-arm forward spectrometer covering the pseudorapidity range $2 < \eta < 5$, initially designed for the study of particles containing $b$ or $c$ quarks. As such, it is naturally suited for the search of beyond SM long-lived particles in a range of mass and lifetime not too dissimilar to heavy-flavour hadrons, as it has been demonstrated in several publications [...] LHCb-CONF-2018-006; CERN-LHCb-CONF-2018-006.- Geneva : CERN, 2018 - 12. Fulltext: LHCb-CONF-2018-006 - PDF; LHCb_CONF_2018_006_figures - ZIP;

2018-11-22
16:50
 LHCb projections for proton-lead collisions during LHC Runs 3 and 4 /LHCb Collaboration Projected sensitivities for selected LHCb measurements using proton-lead collisions during LHC Runs 3 and 4 are presented. The observables considered are Drell-Yan production with dimuon masses between 5 and 120 $GeV/c^2$ , correlations in the production of $D$ and $\overline D$ mesons, and the nuclear modification factor of $B^+$ meson production [...] LHCb-CONF-2018-005; CERN-LHCb-CONF-2018-005.- Geneva : CERN, 2018 - 20. Fulltext: LHCb-CONF-2018-005 - PDF; ZIP - ZIP;

2018-10-04
11:08
 Measurement of $B^+$, $B^0$ and $\Lambda_b^0$ production and nuclear modification in $p$Pb collisions at $\sqrt{s_\mathrm{NN}}=8.16 ~~\text {TeV}$ /LHCb Collaboration The production of $B^+$, $B^0$ and $\Lambda^0_b$ hadrons is studied in proton-lead collisions at a centre-of-mass energy per nucleon pair of $\sqrt{s_\mathrm{NN}}=8.16~~\text {TeV}$ with the LHCb detector at the LHC. The measurement uses an integrated luminosity of $12.2\pm0.3\mathrm{nb}^{-1}$ for the proton beam projecting into the LHCb detector (positive rapidity) and $18.6\pm0.5\mathrm{nb}^{-1}$ for the lead beam projecting into the LHCb detector (negative rapidity). [...] LHCb-CONF-2018-004; CERN-LHCb-CONF-2018-004.- Geneva : CERN, 2018 - 24. Fulltext: LHCb-CONF-2018-004 - PDF; LHCb-CONF-2018-004-figs - ZIP; In : Hard Probes 2018: International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Aix-les-bains, France, 1 - 5 Oct 2018

2018-05-25
14:17
 Study of coherent $J/\psi$ production in lead-lead collisions at $\sqrt{s_{\rm NN}} =5\ \rm{TeV}$ with the LHCb experiment /LHCb Collaboration Coherent production of $J\psi$ mesons is studied in lead-lead collision data at a nucleon-nucleon centre-of-mass energy of $5 \ \rm{TeV}$ collected by the LHCb experiment. The data set corresponds to an integrated luminosity of about $10 \mu b^{-1}$. [...] LHCb-CONF-2018-003; CERN-LHCb-CONF-2018-003.- Geneva : CERN, 2018 - 12. Fulltext: LHCb-CONF-2018-003-Supplementary - ZIP; LHCb-CONF-2018-003-Figs - ZIP; LHCb-CONF-2018-003 - PDF; In : The 27th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions , Venice, Italy, 13 - 19 May 2018

2018-05-22
15:04
 Update of the LHCb combination of the CKM angle $\gamma$ /LHCb Collaboration A combination of tree-level measurements of the CKM angle $\gamma$ at LHCb is performed. The results are obtained from time-integrated measurements of $B^{+}\to D K^{+}$, $B^{+}\to D^{*}K^{+}$, $B^{+}\to DK^{*+}$, $B^{0}\to D K^{*0}$, $B^{0}\to D K^{+}\pi^{-}$ and $B^{+}\to DK^{+}\pi^{+}\pi^{-}$ decays and time-dependent analyses of $B_{s}^{0}\to D_{s}^{\mp}K^{\pm}$ and $B^{0}\to D^{\mp}\pi^{\pm}$ decays. [...] LHCb-CONF-2018-002; CERN-LHCb-CONF-2018-002.- Geneva : CERN, 2018 - 29. Fulltext: LHCb-CONF-2018-002-figures - ZIP; LHCb-CONF-2018-002 - PDF; In : The 17th International Conference on B-Physics at Frontier Machines, Isola D'elba, Italy, 6 - 11 May 2018