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CERN Document Server Sök i 176 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.66 sekunder. 
1.
Search for $CP$ violation in $\Xi_c^+\rightarrow pK^-\pi^+$ decays using model-independent techniques / LHCb Collaboration
A first search for $CP$ violation in the Cabibbo-suppressed $\Xi_c^+\rightarrow pK^-\pi^+$ decay is performed using both a binned and an unbinned model-independent technique in the Dalitz plot. The studies are based on a sample of proton-proton collision data, corresponding to an integrated luminosity of $3.0~\rm fb^{-1}$, and collected by the LHCb experiment at centre-of-mass energies of $7$ and $8~\rm TeV$. [...]
arXiv:2006.03145; CERN-EP-2020-069; LHCb-PAPER-2019-026; LHCB-PAPER-2019-026.- Geneva : CERN, 2020-10-26 - 16 p. - Published in : Eur. Phys. J. C 80 (2020) 986 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
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2.
Precision measurement of the $B_{c}^{+}$ meson mass / LHCb Collaboration
A precision measurement of the $B_{c}^{+}$ meson mass is performed using proton-proton collision data collected with the LHCb experiment at centre-of-mass energies of $7, 8$ and $13$ TeV, corresponding to a total integrated luminosity of $9.0$ fb$^{-1}$. The $B_{c}^{+}$ mesons are reconstructed via the decays $B_{c}^{+} \rightarrow J\mskip -3mu/\mskip -2mu\psi\mskip 2mu \pi^+$, $B_{c}^{+} \rightarrow J\mskip -3mu/\mskip -2mu\psi\mskip 2mu \pi^+ \pi^- \pi^+$, $B_{c}^{+} \rightarrow J\mskip -3mu/\mskip -2mu\psi\mskip 2mu p \bar{p} \pi^+$, $B_{c}^{+} \rightarrow J\mskip -3mu/\mskip -2mu\psi\mskip 2mu D_{s}^{+}$, $B_{c}^{+} \rightarrow J\mskip -3mu/\mskip -2mu\psi\mskip 2mu D^{0} K^{+}$ and $B_{c}^{+} \rightarrow B_{s}^{0} \pi^+$. [...]
arXiv:2004.08163; LHCb-PAPER-2020-003; CERN-EP-2020-048; LHCB-PAPER-2020-003.- Geneva : CERN, 2020-07-20 - 21 p. - Published in : JHEP 2007 (2020) 123 Article from SCOAP3: PDF; Fulltext: LHCb-PAPER-2020-003_arXiv - PDF; 2004.08163 - PDF; Related data file(s): ZIP;
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3.
Observation of new $\Xi_c^0$ baryons decaying to $\Lambda_c^+K^-$ / LHCb Collaboration
The $\Lambda_c^+K^-$ mass spectrum is studied with a data sample of $pp$ collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.6 fb$^{-1}$ collected by the LHCb experiment. Three $\Xi_c^0$ states are observed with a large significance and their masses and natural widths are measured to be \begin{eqnarray*} m(\Xi_c(2923)^0)&=& 2923.04 \pm 0.25 \pm 0.20 \pm 0.14 ~\mathrm{MeV},\\ \Gamma(\Xi_c(2923)^0) &=& 7.1 \pm 0.8 \pm 1.8~\mathrm{MeV}, \end{eqnarray*} \begin{eqnarray*} m(\Xi_c(2939)^0) &=& 2938.55 \pm 0.21 \pm 0.17 \pm 0.14~\mathrm{MeV},\\ \Gamma(\Xi_c(2939)^0) &=& 10.2 \pm 0.8 \pm 1.1~\mathrm{MeV}, \end{eqnarray*} \begin{eqnarray*} m(\Xi_c(2965)^0) &=& 2964.88 \pm 0.26 \pm 0.14 \pm 0.14~\mathrm{MeV}, \\ \Gamma(\Xi_c(2965)^0) &=& 14.1 \pm 0.9 \pm 1.3~\mathrm{MeV}, \end{eqnarray*} where the uncertainties are statistical, systematic, and due to the limited knowledge of the $\Lambda_c^+$ mass. [...]
arXiv:2003.13649; LHCb-PAPER-2020-004; CERN-EP-2020-038; LHCB-PAPER-2020-004.- Geneva : CERN, 2020-06-05 - 11 p. - Published in : Phys. Rev. Lett. Article from SCOAP3: PDF; Fulltext: LHCb_PAPER_2020_004_arXiv - PDF; 2003.13649 - PDF; Fulltext from Publisher: PDF; Related data files: ZIP; Supplementary information: ZIP;
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4.
Measurement of the shape of the $ {B}_s^0\to {D}_s^{\ast -}{\mu}^{+}{\nu}_{\mu } $ differential decay rate / LHCb Collaboration
The shape of the $B_s^0\rightarrow D_s^{*-}\mu^+\nu_{\mu}$ differential decay rate is obtained as a function of the hadron recoil using proton-proton collision data at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7 fb$^{-1}$ collected by the LHCb detector. The $B_s^0\rightarrow D_s^{*-}\mu^+\nu_{\mu}$ decay is reconstructed through the decays $D_s^{*-}\rightarrow D_s^{-}\gamma$ and $D_s^{-}\rightarrow K^-K^+\pi^-$. [...]
arXiv:2003.08453; LHCb-PAPER-2019-046; CERN-EP-2020-026; LHCB-PAPER-2019-046.- Geneva : CERN, 2020-12-22 - 32 p. - Published in : JHEP 2012 (2020) 144 Article from SCOAP3: PDF; Fulltext: 2003.08453 - PDF; LHCb-PAPER-2019-046 - PDF; Related data files: ZIP; Supplementary material: ZIP;
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5.
Search for the lepton flavour violating decay $B^+ \rightarrow K^+ \mu^- \tau^+$ using $B_{s2}^{*0}$ decays / LHCb Collaboration
A search is presented for the lepton flavour violating decay $B^+ \rightarrow K^+ \mu^- \tau^+$ using 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${}^{-1}$. The $\tau$ leptons are selected inclusively, primarily via decays with a single charged particle. [...]
arXiv:2003.04352; LHCb-PAPER-2019-043; CERN-EP-2020-020; LHCB-PAPER-2019-043.- Geneva : CERN, 2020-06-22 - 19 p. - Published in : JHEP 2006 (2020) 129 Article from SCOAP3: PDF; Fulltext: LHCb-PAPER-2019-043 - PDF; 2003.04352 - PDF; Related data file(s): ZIP;
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6.
Measurement of $C\!P$-averaged observables in the $B^{0}\rightarrow K^{*0}\mu^{+}\mu^{-}$ decay / LHCb Collaboration
An angular analysis of the $B^{0}\rightarrow K^{*0}(\to K^{+}\pi^{-})\mu^{+}\mu^{-}$ decay is presented using a data set corresponding to an integrated luminosity of $4.7{\mbox{fb}^{-1}}$ of $pp$ collision data collected with the LHCb experiment. The full set of $C\!P$-averaged observables are determined in bins of the invariant mass squared of the dimuon system. [...]
arXiv:2003.04831; LHCb-PAPER-2020-002; CERN-EP-2020-027; LHCB-PAPER-2020-002.- Geneva : CERN, 2020-07-02 - 13 p. - Published in : Phys. Rev. Lett. 125 (2020) 011802 Article from SCOAP3: PDF; Fulltext: 2003.04831 - PDF; LHCb_PAPER_2020_002 - PDF; Fulltext from Publisher: PDF; Supplementary material: ZIP;
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7.
Search for the rare decays $B_s^0 \to e^+e^-$ and $B^0 \to e^+e^-$ / LHCb Collaboration
A search for the decays $B^0_s\to e^+e^-$ and $B^0\to e^+e^-$ is performed using data collected with the LHCb experiment in proton-proton collisions at center-of-mass energies of $7$, $8$ and $13\,\text{TeV}$, corresponding to integrated luminosities of $1$, $2$ and $2\,\text{fb}^{-1}$, respectively. No signal is observed. [...]
arXiv:2003.03999; LHCb-PAPER-2020-001; CERN-EP-2020-023; LHCB-PAPER-2020-001.- Geneva : CERN, 2020-05-28 - 11 p. - Published in : Phys. Rev. Lett. 124 (2020) 211802 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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8.
Measurement of $CP$ observables in $B^\pm \to D K^\pm$ and $B^\pm \to D \pi^\pm$ with $D \to K_{\rm{S}}^0 K^\pm \pi^\mp$ decays / LHCb Collaboration
Measurements of $CP$ observables in $B^\pm \to D K^\pm$ and $B^\pm \to D \pi^\pm$ decays are presented, where $D$ represents a superposition of $D^0$ and $\bar{D}^0$ states. The $D$ meson is reconstructed in the three-body final state $K_{\rm{S}}^0 K^\pm \pi^\mp$. [...]
arXiv:2002.08858; LHCB-PAPER-2019-044; LHCB-PAPER-2019-044-003; LHCb-PAPER-2019-044; CERN-EP-2020-015; LHCB-PAPER-2019-044.- Geneva : CERN, 2020-06-08 - 26 p. Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
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9.
Measurement of the branching fraction of the decay $B_s^0\to K_S^0 K_S^0$ / LHCb Collaboration
A measurement of the branching fraction of the decay $B_s^0 \to K_S^0 K_S^0$ is performed using proton-proton collision data corresponding to an integrated luminosity of 5 fb$^{-1}$ collected by the LHCb experiment between 2011 and 2016. The branching fraction is determined to be$$ \mathcal{B}(B_s^0 \to K_S^0 K_S^0) = [8.3 \pm 1.6 (\rm{stat}) \pm 0.9 (\rm{syst}) \pm 0.8 (\rm{norm}) \pm 0.3 (f_s/f_d)] \times 10^{-6}, $$ where the first uncertainty is statistical, the second is systematic, and the third and fourth are due to uncertainties on the $B^0 \to \phi K_S^0$ branching fraction and the ratio of hadronization fractions $f_s/f_d$ [...]
arXiv:2002.08229; LHCb-PAPER-2019-030; CERN-EP-2020-008; LHCB-PAPER-2019-030.- Geneva : CERN, 2020-08-01 - 15 p. - Published in : Phys. Rev. D 102 (2020) 012011 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
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10.
Observation of a new baryon state in the $\Lambda_b^0\pi^+\pi^-$ mass spectrum / LHCb Collaboration
A new baryon state is observed in the $\Lambda_b^0\pi^+\pi^-$ mass spectrum with high significance using a data sample of $pp$ collisions, collected with the LHCb detector at centre-of-mass energies $\sqrt{s}=7, 8$ and $13$ TeV, corresponding to an integrated luminosity of 9 fb$^{-1}$. The mass and natural width of the new state are measured to be \begin{eqnarray*} m & = & 6072.3 \pm 2.9 \pm 0.6 \pm 0.2 MeV\,, \\ \Gamma & = & 72 \pm 11 \pm 2 MeV\,, \end{eqnarray*} where the first uncertainty is statistical and the second systematic. [...]
arXiv:2002.05112; CERN-EP-2020-013; LHCb-PAPER-2019-045; LHCB-PAPER-2019-045.- Geneva : CERN, 2020-06-23 - 24 p. - Published in : JHEP 2006 (2020) 136 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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CERN Document Server : Sök i 176 journaler efter:   1 - 10nästaslut  gå till journal:
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