LHCb Papers

2018-01-12
14:34
 Evidence for the rare decay $\Sigma^+ \to p \mu^+ \mu^-$ / LHCb Collaboration A search for the rare decay $\Sigma^+ \to p \mu^+ \mu^-$ is performed using $pp$ collision data recorded by the LHCb experiment at centre-of-mass energies $\sqrt{s} = 7$ and $8$ TeV, corresponding to an integrated luminosity of $3 fb^{-1}$. [...] LHCB-PAPER-2017-049 ; CERN-EP-2017-319 ; arXiv:1712.08606 ; LHCB-PAPER-2017-049. - 2018. Fulltext - Related data file(s) - Supplementary information - Preprint

2018-01-11
09:32
 Studies of the resonance structure in $D^{0} \to K^\mp \pi^\pm \pi^\pm \pi^\mp$ decays / LHCb Collaboration Amplitude models are constructed to describe the resonance structure of ${D^{0}\to K^{-}\pi^{+}\pi^{+}\pi^{-}}$ and ${D^{0} \to K^{+}\pi^{-}\pi^{-}\pi^{+}}$ decays using $pp$ collision data collected at centre-of-mass energies of 7 and 8 TeV with the LHCb experiment, corresponding to an integrated luminosity of $3.0\mathrm{fb}^{-1}$. [...] LHCB-PAPER-2017-040 ; CERN-EP-2017-314 ; arXiv:1712.08609. - 2018. Fulltext - Previous draft version - Related data file(s) - Preprint

2018-01-08
14:52
 First measurement of the $CP$-violating phase $\phi_s^{d\overline{d}}$ in $B_s^0\to(K^+\pi^-)(K^-\pi^+)$ decays / LHCb Collaboration A flavour-tagged decay-time-dependent amplitude analysis of $B_s^0\to(K^+\pi^-)(K^-\pi^+)$ decays is presented in the $K^{\pm}\pi^{\mp}$ mass range from 750 to 1600 MeV$/c^2$. [...] LHCB-PAPER-2017-048 ; CERN-EP-2017-320 ; arXiv:1712.08683. - 2018. Fulltext - Related data file(s) - Preprint

2017-12-22
09:56
 A search for weakly decaying $b$-flavored pentaquarks / LHCb Collaboration Investigations of the existence of pentaquark states containing a single $b$ (anti)quark decaying weakly into four specific final states $J/\psi K^+\pi^- p$, $J/\psi K^- \pi^- p$, $J/\psi K^- \pi^+ p$, and $J/\psi \phi (1020) p$ are reported. [...] CERN-EP-2017-329 ; LHCB-PAPER-2017-043 ; arXiv:1712.08086 ; LHCB-PAPER-2017-043. - 2017. - 10 p. Fulltext - Related data file(s) - Preprint

2017-12-21
15:21
 Measurement of $C\!P$ asymmetry in $B_s^0 \to D_s^{\mp} K^{\pm}$ decays / LHCb Collaboration We report the measurements of the $C\!P$-violating parameters in $B_s^0 \to D_s^{\mp} K^{\pm}$ decays observed in $pp$ collisions, using a data set corresponding to an integrated luminosity of $3.0\,\text{fb}^{-1}$ recorded with the LHCb detector. [...] LHCB-PAPER-2017-047 ; CERN-EP-2017-315 ; arXiv:1712.07428 ; LHCB-PAPER-2017-047. - 2017. Fulltext - Related data file(s) - Supplementary information - Preprint

2017-12-20
15:34
 A measurement of the $C\!P$ asymmetry difference in $\varLambda_{c}^{+} \to pK^{-}K^{+}$ and $p\pi^{-}\pi^{+}$ decays / LHCb Collaboration The difference between the $C\!P$ asymmetries in the decays $\varLambda_{c}^{+} \to pK^{-}K^{+}$ and $\varLambda_{c}^{+} \to p\pi^{-}\pi^{+}$ is presented. [...] CERN-EP-2017-316 ; LHCB-PAPER-2017-044 ; arXiv:1712.07051 ; LHCB-PAPER-2017-044. - 2017. Fulltext - Related data file(s) - Preprint - Supplementary information

2017-11-21
11:13
 Search for excited $B_c^+$ states / LHCb Collaboration A search is performed in the invariant mass spectrum of the $B_c^{+}\pi^{+}\pi^{-}$ system for the excited $B_c^{+}$ states $B_c(2^{1}S_{0})^+$ and $B_c(2^{3}S_{1})^+$ using a data sample of $pp$ collisions collected by the LHCb experiment at the centre-of-mass energy of $\sqrt{s} = 8 \,{\mathrm{TeV}}$, corresponding to an integrated luminosity of $2 \,{\mathrm{fb^{-1}}}$. No evidence is seen for either state. [...] CERN-EP-2017-306; LHCB-PAPER-2017-042; arXiv:1712.04094; LHCB-PAPER-2017-042.- Geneva : CERN, 2018-01-29 - 19 p. - Published in : JHEP 01 (2018) 138 Article from SCOAP3: PDF; Preprint: PDF; Supplementary information: ZIP; External link: Additional information for the analysis

2017-11-20
16:12
 Updated determination of $D^0$-$\overline{D}^0$ mixing and $C\!P$ violation parameters with $D^0 \to K^+\pi^-$ decays / LHCb Collaboration We report measurements of charm-mixing parameters based on the decay-time-dependent ratio of $D^0\to K^+\pi^-$ to $D^0\to K^-\pi^+$ rates. [...] CERN-EP-2017-304 ; LHCB-PAPER-2017-046 ; arXiv:1712.03220 ; LHCB-PAPER-2017-046. - 2017. - 18 p, 18 p. Supplementary information - Related data file(s) - Full text - Preprint

2017-11-20
10:26
 Measurement of branching fractions of charmless four-body $\Lambda_b^0$ and $\Xi_b^0$ decays / LHCb Collaboration A search for charmless four-body decays of $\Lambda_b^0$ and $\Xi_b^0$ baryons with a proton and three charged mesons (either kaons or pions) in the final state is performed. [...] CERN-EP-2017-278 ; LHCB-PAPER-2017-034 ; arXiv:1711.05490 ; LHCB-PAPER-2017-034. - 2017. - 25 p, 25 p. Fulltext - Related data file(s) - Preprint

2017-11-16
16:44
 Measurement of the ratio of branching fractions $\mathcal{B}(B_c^+\,\to\,J/\psi\tau^+\nu_\tau)$/$\mathcal{B}(B_c^+\,\to\,J/\psi\mu^+\nu_\mu)$ / LHCb Collaboration A measurement is reported of the ratio of branching fractions $\mathcal{R}(J/\psi)=\mathcal{B}(B_c^+\,\to\,J/\psi\tau^+\nu_\tau)/\mathcal{B}(B_c^+\,\to\,J/\psi \mu^+\nu_\mu)$, where the $\tau^+$ lepton is identified in the decay mode $\tau^+\,\to\,\mu^+\nu_\mu\overline{\nu}_\tau$. [...] LHCB-PAPER-2017-035 ; CERN-EP-2017-275 ; arXiv:1711.05623 ; LHCB-PAPER-2017-035. - 2017. - 18 p, 18 p. Fulltext - Related data file(s) - Preprint - Supplementary information