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LHCb Papers

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2017-07-10
15:56
Study of prompt D$^0$ meson production in pPb collisions at $\sqrt{s}=5 TeV$ / LHCb Collaboration
Production of prompt D$^0$ mesons is studied in proton-lead and lead-proton collisions recorded at the LHCb detector at the LHC. [...]
LHCB-PAPER-2017-015 ; CERN-EP-2017-135 ; arXiv:1707.02750 ; LHCB-PAPER-2017-015. - 2017.
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2017-07-07
07:35
Observation of the doubly charmed baryon $\Xi_{cc}^{++}$ / LHCb Collaboration
A highly significant structure is observed in the $\Lambda_c^+ K^- \pi^+ \pi^+$ mass spectrum, where the $\Lambda_c^+$ baryon is reconstructed in the decay mode $p K^- \pi^+$. [...]
LHCB-PAPER-2017-018 ; CERN-EP-2017-156 ; arXiv:1707.01621. - 19 p, 19 p.
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2017-06-24
09:59
Prompt and nonprompt J/$\psi$ production and nuclear modification in $p$Pb collisions at $\sqrt{s_{\text{NN}}}= 8.16$ TeV / LHCb Collaboration
The production of J/$\psi$ mesons is studied in proton-lead collisions at the centre-of-mass energy per nucleon pair $\sqrt{s_{\text{NN}}}=8.16$ TeV with the LHCb detector at the LHC. [...]
LHCB-PAPER-2017-014 ; CERN-EP-2017-122 ; arXiv:1706.07122 ; LHCB-PAPER-2017-014 ; EP-2017-122. - 2017.
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2017-06-24
09:59
Study of charmonium production in $b$-hadron decays and first evidence for the decay $B_s^0 \rightarrow \phi \phi \phi$ / LHCb Collaboration
Using decays to $\phi$-meson pairs, the inclusive production of charmonium states in $b$-hadron decays is studied with $pp$ collision data corresponding to an integrated luminosity of $3.0fb^{-1}$, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. [...]
LHCB-PAPER-2017-007 ; CERN-EP-2017-099 ; arXiv:1706.07013 ; LHCB-PAPER-2017-007. -
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2017-06-06
11:29
Improved limit on the branching fraction of the rare decay $K^0_{\scriptscriptstyle S}\to\mu^+\mu^-$ / LHCb Collaboration
A search for the decay $K^0_{\scriptscriptstyle S}\to\mu^+\mu^-$ is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3 fb$^{-1}$, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. [...]
CERN-EP-2017-101-LHCB-PAPER-2017-009 ; arXiv:1706.00758 ; LHCB-PAPER-2017-009. - 2017.
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2017-05-22
14:16
Updated search for long-lived particles decaying to jet pairs / LHCb Collaboration
A search is presented for long-lived particles with a mass between 25 and 50 GeV/$c^2$ and a lifetime between 2 and 500 ps, using proton-proton collision data corresponding to an integrated luminosity of 2.0 fb$^{-1}$, collected by the LHCb detector at centre-of-mass energies of 7 and 8 TeV. [...]
LHCB-PAPER-2016-065 ; CERN-EP-2017-083 ; arXiv:1705.07332 ; LHCB-PAPER-2016-065. - 2017. - 23 p.
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2017-05-18
09:34
Test of lepton universality with $B^{0} \rightarrow K^{*0}\ell^{+}\ell^{-}$ decays / LHCb Collaboration
A test of lepton universality, performed by measuring the ratio of the branching fractions of the $B^{0} \rightarrow K^{*0}\mu^{+}\mu{^-}$ and $B^{0} \rightarrow K^{*0}e^{+}e{^-}$ decays, $R_{K^{*0}}$, is presented. [...]
LHCB-PAPER-2017-013 ; CERN-EP-2017-100 ; arXiv:1705.05802 ; LHCB-PAPER-2017-013. - 2017.
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2017-05-12
10:56
Measurement of $B^0_s$ and $D^-_s$ meson lifetimes / LHCb Collaboration
We report on a measurement of the flavor-specific $B^{0}_{s}$ lifetime and of the $D^{-}_{s}$ lifetime using proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to 3.0 fb$^{-1}$ of integrated luminosity. [...]
CERN-EP-2017-070 ; LHCB-PAPER-2017-004 ; arXiv:1705.03475. - 2017. - 16 p.
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2017-05-08
14:53
Observation of five new narrow $\Omega_c^0$ states decaying to $\Xi^+_c K^-$ / LHCb Collaboration
The $\Xi^+_c K^-$ mass spectrum is studied with a sample of $pp$ collision data corresponding to an integrated luminosity of 3.3 fb$^{-1}$, collected by the LHCb experiment. The $\Xi^+_c$ is reconstructed in the decay mode $pK^- \pi^+$. [...]
CERN-EP-2017-037; arXiv:1703.04639; LHCB-PAPER-2017-002.- Geneva : CERN, 2017 - Published in : Phys. Rev. Lett. 118 (2017) 182001 Supplementary information: ZIP; External links: 00001 Distribution of the reconstructed invariant mass $m(\Xicp \Km)$ for all candidates passing the likelihood ratio selection; the solid (red) curve shows the result of the fit, and the dashed (blue) line indicates the fitted background. The shaded (red) histogram shows the corresponding mass spectrum from the \Xicp sidebands and the shaded (light gray) distributions indicate the feed-down from partially reconstructed $\Omegares_\cquark(X)^0$ resonances.; 00002 Distribution of the reconstructed invariant mass $m(\Xicp \Km)$ for all candidates passing the likelihood ratio selection, shown as black points with error bars, and the wrong-sign $m(\Xicp \Kp)$ spectrum scaled by a factor of 0.95, shown as a solid (red) histogram.; 00000 Distribution of the reconstructed invariant mass $m(\pkpi)$ for all candidates in the inclusive \Xicp sample passing the likelihood ratio selection described in the text. The solid (red) curve shows the result of the fit, and the dashed (blue) line indicates the fitted background.; Fulltext

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2017-05-02
11:15
Resonances and $CP$ violation in $B^{0}_{s}$ and $\overline{B}{}^{0}_{s}\to J/\psi K^{+} K^{-}$ decays in the mass region above the $\phi(1020)$ / LHCb Collaboration
The decays of $B^{0}_{s}$ and $\overline{B}{}^{0}_{s}$ mesons into the $J/\psi K^+K^-$ final state are studied in the $K^+K^-$ mass region above the $\phi(1020)$ meson in order to determine the resonant substructure and measure the $CP$-violating phase, $\phi_s$, the decay width, $\Gamma_s$, and the width difference between light and heavy mass eigenstates, $\Delta \Gamma_s$. [...]
CERN-EP-2017-062 ; LHCB-PAPER-2017-008 ; arXiv:1704.08217 ; LHCB-PAPER-2017-008. - 2017. - 28 p.
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