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CERN Document Server Sök i 264 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 0.61 sekunder. 
1.
Measurement of the ratio of branching fractions of the decays $\Lambda_b^0 \!\to \psi(2S) \Lambda$ and $\Lambda_b^0 \!\to J\!/\!\psi \Lambda$ / LHCb Collaboration
Using $pp$ collisions corresponding to 3$\,\text{fb}^{-1}$ integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8$\,\text{TeV}$, the ratio of branching fractions \begin{align*} \mathcal{B}(\Lambda^0_b\!\to\psi(2S) \Lambda )/\mathcal{B}(\Lambda^0_b\!\to J/\psi \Lambda)= 0.513 \pm 0.023\, (\text{stat}) \pm 0.016 \, (\text{syst}) \pm 0.011\, (\mathcal{B}) \end{align*} is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used..
arXiv:1902.02092; LHCb-PAPER-2017-041; CERN-EP-2019-003.- Geneva : CERN, 2019-03-22 - 16 p. - Published in : JHEP 03 (2019) 126 Article from SCOAP3: PDF; Fulltext: LHCb-Paper-2017-041 - PDF; 1902.02092 - PDF; Related data file(s): ZIP;
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2.
Measurement of $\Upsilon$ production in $pp$ collisions at $\sqrt{s}$= 13 TeV / LHCb Collaboration
The production cross-sections of $\Upsilon(1S)$, $\Upsilon(2S)$ and $\Upsilon(3S)$ mesons in proton-proton collisions at $\sqrt{s}$= 13 TeV are measured with a data sample corresponding to an integrated luminosity of $277 \pm 11$ $\rm pb^{-1}$ recorded by the LHCb experiment in 2015. The $\Upsilon$ mesons are reconstructed in the decay mode $\Upsilon\to\mu^{+}\mu^{-}$. [...]
arXiv:1804.09214; LHCB-PAPER-2018-002; CERN-EP-2018-054; LHCB-PAPER-2018-002.- 2018-07-20 - 26 p. Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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3.
Search for a dimuon resonance in the $\Upsilon$ mass region / LHCb Collaboration
A search is performed for a spin-0 boson, $\phi$, produced in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, using prompt $\phi\rightarrow\mu^+\mu^-$ decays and a data sample corresponding to an integrated luminosity of approximately 3.0 ${\rm fb}^{-1}$ collected with the LHCb detector. No evidence is found for a signal in the mass range from 5.5 to 15 GeV. [...]
arXiv:1805.09820; LHCb-PAPER-2018-008; CERN-EP-2018-111; LHCB-PAPER-2018-008; LHCB-PAPER-2018-008.- Geneva : CERN, 2018-09-26 - 22 p. - Published in : JHEP 09 (2018) 147 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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4.
Measurement of $D_s^{\pm}$ production asymmetry in $pp$ collisions at $\sqrt{s} =7$ and 8 TeV / LHCb Collaboration
The inclusive $D_s^{\pm}$ production asymmetry is measured in $pp$ collisions collected by the LHCb experiment at centre-of-mass energies of $\sqrt{s} =7$ and 8 TeV. Promptly produced $D_s^{\pm}$ mesons are used, which decay as $D_s^{\pm}\to\phi\pi^{\pm}$, with $\phi\to K^+K^-$ [...]
arXiv:1805.09869; LHCb-PAPER-2018-010; CERN-EP-2018-073; LHCB-PAPER-2018-010.- Geneva : CERN, 2018-08-02 - 22 p. - Published in : JHEP 08 (2018) 008 Article from SCOAP3: PDF; Fulltext: arXiv:1805.09869 - PDF; 1805.09869 - PDF; LHCb-PAPER-2018-010 - PDF; Related data file(s): ZIP; Supplementary Information: ZIP; External link: Figures, tables and other information
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5.
Measurement of $C\!P$ asymmetries in two-body $B_{(s)}^{0}$-meson decays to charged pions and kaons / LHCb Collaboration
The time-dependent $C\!P$ asymmetries in $B^0\to\pi^+\pi^-$ and $B_s^0\to K^+\!K^-$ decays are measured using a data sample of $pp$ collisions corresponding to an integrated luminosity of 3.0 fb$^{-1}$, collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The same data sample is used to measure the time-integrated $C\!P$ asymmetries in $B^0\to K^+\pi^-$ and $B_s^0\to\pi^+ K^-$ decays. [...]
arXiv:1805.06759; LHCb-PAPER-2018-006; CERN-EP-2018-086; LHCB-PAPER-2018-006.- 2018-08-11 - 23 p. - Published in : Phys. Rev. D 98 (2018) 032004 Article from SCOAP3: PDF; Fulltext: PDF; External link: Figures, tables and other information
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6.
Search for CP violation using triple product asymmetries in $\Lambda^{0}_{b}\to pK^{-}\pi^{+}\pi^{-}$, $\Lambda^{0}_{b}\to pK^{-}K^{+}K^{-}$ and $\Xi^{0}_{b}\to pK^{-}K^{-}\pi^{+}$ decays / LHCb Collaboration
A search for $C$P and $P$ violation using triple-product asymmetries is performed with $\Lambda^{0}_{b}\to pK^{-}\pi^{+}\pi^{-}$, $\Lambda^{0}_{b}\to pK^{-}K^{+}K^{-}$ and $\Xi^{0}_{b}\to pK^{-}K^{-}\pi^{+}$ decays. The data sample corresponds to integrated luminosities of 1.0fb$^{-1}$ and 2.0fb$^{-1}$, recorded with the LHCb detector at centre-of-mass energies of 7TeV and 8TeV, respectively. [...]
arXiv:1805.03941; LHCB-PAPER-2018-001; CERN-EP-2018-081; LHCb-PAPER-2018-001.- 2018-08-09 - 25 p. - Published in : JHEP 08 (2018) 039 Article from SCOAP3: PDF; Fulltext: arXiv:1805.03941 - PDF; 1805.03941 - PDF; Related data file(s): ZIP;
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7.
Measurement of $CP$ violation in $B^{0}\rightarrow D^{\mp}\pi^{\pm}$ decays / LHCb Collaboration
A measurement of the $CP$ asymmetries $S_{f}$ and $S_{\bar{f}}$ in $B^0\to D^{\mp}\pi^{\pm}$ decays is reported. The decays are reconstructed in a dataset collected with the LHCb experiment in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of $3.0 \rm{ fb}^{-1}$. [...]
arXiv:1805.03448; LHCb-PAPER-2018-009; CERN-EP-2018-084; LHCB-PAPER-2018-009; LHCB-PAPER-2018-009.- Geneva : CERN, 2018-06-18 - 24 p. - Published in : JHEP 06 (2018) 084 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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8.
Observation of the decay $\Lambda_b^0 \to \Lambda_c^+ p \overline{p} \pi^-$ / LHCb Collaboration
The decay $\Lambda_b^0 \to \Lambda_c^+ p \overline{p} \pi^-$ is observed using $pp$ collision data collected with the LHCb detector at centre-of-mass energies of $\sqrt{s}=$ 7 and 8 TeV, corresponding to an integrated luminosity of 3 $fb^{-1}$. The ratio of branching fractions between $\Lambda_b^0 \to \Lambda_c^+ p \overline{p} \pi^-$ and $\Lambda_b^0 \to \Lambda_c^+ \pi^-$ decays is measured to be \begin{equation*} \frac{\mathcal{B}(\Lambda_b^0 \to \Lambda_c^+ p \overline{p}\pi^-)}{\mathcal{B}(\Lambda_b^0 \to \Lambda_c^+ \pi^-)} = 0.0540 \pm 0.0023 \pm 0.0032. [...]
arXiv:1804.09617; LHCB-PAPER-2018-005; LHCb-PAPER-2018-005; CERN-EP-2018-051; LHCB-PAPER-2018-005.- Geneva : CERN, 2018-09-10 - 11 p. - Published in : Phys. Lett. B 784 (2018) 101-111 Article from SCOAP3: PDF; Fulltext: arXiv:1804.09617 - PDF; 1804.09617 - PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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9.
Evidence for the decay $B_{s}^0 \rightarrow \overline{K}{}^{*0}\mu^+\mu^-$ / LHCb Collaboration
A search for the decay $B_{s}^0 \rightarrow \overline{K}{}^{*0}\mu^+\mu^-$ is presented using data sets corresponding to 1.0, 2.0 and 1.6 $\text{fb}^{-1}$ of integrated luminosity collected during $pp$ collisions with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, respectively. An excess is found over the background-only hypothesis with a significance of 3.4 standard deviations. [...]
arXiv:1804.07167; LHCb-PAPER-2018-004; CERN-EP-2018-059; LHCB-PAPER-2018-004; LHCB-PAPER-2018-004.- Geneva : CERN, 2018-07-03 - 25 p. - Published in : JHEP 07 (2018) 020 Article from SCOAP3: PDF; Fulltext: arXiv:1804.07167 - PDF; 1804.07167 - PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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10.
Measurement of the $CP$ asymmetry in $B^-\to D_s^-D^0$ and $B^-\to D^-D^0$ decays / LHCb Collaboration
The $CP$ asymmetry in $B^-\to D_s^-D^0$ and $B^-\to D^-D^0$ decays is measured using LHCb data corresponding to an integrated luminosity of 3.0 fb$^{-1}$, collected in $pp$ collisions at centre-of-mass energies of 7 and 8 TeV. The results are $A^{CP}(B^-\to D_s^-D^0)=(-0.4\pm 0.5\pm 0.5)\%$ and $A^{CP}(B^-\to D^-D^0)=( 2.3\pm 2.7\pm 0.4)\%$, where the first uncertainties are statistical and the second systematic. [...]
arXiv:1803.10990; LHCb-PAPER-2018-007; CERN-EP-2018-046; LHCB-PAPER-2018-007.- Geneva : CERN, 2018-05-25 - 18 p. - Published in : JHEP 05 (2018) 160 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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