# EP Articles

2018-07-16
15:53
 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 $\Upsilon\to\mu^{+}\mu^{-}$. [...] LHCB-PAPER-2018-002; CERN-EP-2018-054; arXiv:1804.09214; LHCB-PAPER-2018-002.- 2018-07-20 - 26 p. - Published in : JHEP 07 (2018) 134 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;

2018-06-08
09:33
 First measurement of the lifetime of the doubly charmed baryon $\Xi_{cc}^{++}$ / LHCb Collaboration The first measurement of the lifetime of the doubly charmed baryon $\Xi_{cc}^{++}$ is presented, with the signal reconstructed in the final state $\Lambda_c^+ K^- \pi^+ \pi^+$. The data sample used corresponds to an integrated luminosity of $1.7\,\mathrm{fb}^{-1}$, collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of $13\mathrm{\,Te\kern -0.1em V}$. [...] LHCb-PAPER-2018-019; CERN-EP-2018-146; arXiv:1806.02744; LHCB-PAPER-2018-019.- Geneva : CERN, 2018-08-01 - 10 p. - Published in : Phys. Rev. Lett. 121 (2018) 052002 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;

2018-06-01
09:09
 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 $\phi\to K^+K^-$. [...] LHCb-PAPER-2018-010; CERN-EP-2018-073; LHCB-PAPER-2018-010; arXiv:1805.09869.- Geneva : CERN, 2018-08-02 - 22 p. - Published in : JHEP 08 (2018) 008 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary Information: ZIP;

2018-05-09
13:47
 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 $3.0 \rm{ fb}^{-1}$. [...] LHCb-PAPER-2018-009; CERN-EP-2018-084; LHCB-PAPER-2018-009; arXiv:1805.03448; 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;

2018-04-26
14:01
 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. [...] LHCB-PAPER-2018-005; CERN-EP-2018-051; arXiv:1804.09617; 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: PDF; Related data file(s): ZIP; External link: Previous draft version

2018-04-20
14:41
 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. [...] LHCb-PAPER-2018-004; CERN-EP-2018-059; LHCB-PAPER-2018-004; arXiv:1804.07167; LHCB-PAPER-2018-004.- Geneva : CERN, 2018-07-03 - 25 p. - Published in : JHEP 07 (2018) 020 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;

2018-04-06
10:58
 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. [...] LHCb-PAPER-2018-007; CERN-EP-2018-046; LHCB-PAPER-2018-007; arXiv:1803.10990.- 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;

2018-03-29
17:40
 Search for the Standard Model Higgs Boson at LEP /DELPHI Collaboration ; ALEPH Collaboration ; L3 Collaboration ; OPAL Collaboration The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have collected 2461 pb−1 of e+e− collision data at centre-of-mass energies between 189 and 209 GeV, of which 536 pb−1 have energies above 206 GeV. The data have been used to search for the Standard Model Higgs boson. [...] CERN-ALEPH-2002-024; CERN-ALEPH-CONF-2002-013; DELPHI-2002-088-CONF-621; CERN-DELPHI-2002-088-CONF-621; L3-Note-2766; OPAL-TN721; LHWG-Note-2002-01.- Geneva : CERN, 2002 - 28 p. Fulltext: cer-002264432 - PDF; aleph-2002-024 - PDF; In : 31st International Conference on High Energy Physics, Amsterdam, The Netherlands, 25 - 31 Jul 2002

2018-03-29
15:29
 Measurement of the inelastic $pp$ cross-section at a centre-of-mass energy of 13\,TeV / LHCb Collaboration The cross-section for inelastic proton-proton collisions at a centre-of-mass energy of 13\,TeV is measured with the LHCb detector. The fiducial cross-section for inelastic interactions producing at least one prompt long-lived charged particle with momentum $p>2$\,GeV/$c$ in the pseudorapidity range $2<\eta<5$ is determined to be $\sigma_{\rm acc}= 62.2 \pm 0.2 \pm 2.5$\,mb. [...] LHCb-PAPER-2018-003; CERN-EP-2018-044; LHCB-PAPER-2018-003; arXiv:1803.10974; LHCB-PAPER-2018-003.- Geneva : CERN, 2018-06-20 - 18 p. - Published in : JHEP 06 (2018) 100 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;

2018-03-26
10:15
 Search for $B_c^+$ decays to two charm mesons / LHCb Collaboration A search for decays of $B_c^+$ mesons to two charm mesons is performed for the first time using data corresponding to an integrated luminosity of 3.0 fb$^{-1}$, collected by the LHCb experiment in $pp$ collisions at centre-of-mass energies of 7 and 8 TeV. The decays considered are $B_c^+\to D^{(*)+}_{(s)} \overline{D}^{(*)0}$ and $B_c^+\to D^{(*)+}_{(s)} D^{(*)0}$, which are normalised to high-yield $B^+\to D^+_{(s)} \overline{D}^0$ decays. [...] LHCB-PAPER-2017-045; CERN-EP-2017-313; arXiv:1712.04702; LHCB-PAPER-2017-045.- Geneva : CERN, 2018-05 - 20 p. - Published in : Nucl. Phys. B 930 (2018) 563-582 Article from SCOAP3: PDF; Fulltext: PDF; Preprint: PDF; Related data file(s): ZIP; Supplementary information: ZIP;