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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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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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Strong constraints on the $K^0_{\mathrm{S}}\rightarrow\mu^{+}\mu^{-}$ branching fraction / LHCb Collaboration
A search for the decay $K^0_{\mathrm{S}}\rightarrow\mu^{+}\mu^{-}$ is performed using proton-proton collision data, corresponding to an integrated luminosity of $5.6\,\text{fb}^{-1}$ and collected with the LHCb experiment during 2016, 2017 and 2018 at a center-of-mass energy of $13\,\mathrm{TeV}$. The observed signal yield is consistent with zero, yielding an upper limit of ${\cal B}(K^0_{\mathrm{S}}\rightarrow\mu^{+}\mu^{-}) < 2.2 \times 10^{-10}$ at 90% CL. [...]
arXiv:2001.10354; LHCb-PAPER-2019-038; CERN-EP-2019-285; LHCb-PAPER-2019-038 CERN-EP-2019-285.- Geneva : CERN, 2020-12-03 - 10 p. - Published in : Phys. Rev. Lett. 125 (2020) 231801 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Measurement of $|V_{cb}|$ with $B_s^0 \to D_s^{(*)-} \mu^+ \nu_{\mu}$ decays / LHCb Collaboration
The element $|V_{cb}|$ of the Cabibbo-Kobayashi-Maskawa matrix is measured using semileptonic $B_s^0$ decays produced in proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb$^{-1}$. Rates of $B_s^0 \to D_s^{-} \mu^+ \nu_{\mu}$ and $B_s^0 \to D_s^{*-} \mu^+ \nu_{\mu}$ decays are analyzed using hadronic form-factor parametrizations derived either by Caprini, Lellouch and Neubert (CLN) or by Boyd, Grinstein and Lebed (BGL). [...]
arXiv:2001.03225; LHCb-PAPER-2019-041; CERN-EP-2019-282; LHCB-PAPER-2019-041.- Geneva : CERN, 2020-04-21 - 25 p. - Published in : Phys. Rev. D 101 (2020) 072004 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary material: ZIP;

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First observation of excited $\Omega_b^-$ states / LHCb Collaboration
We report four narrow peaks in the $\Xi_b^0K^-$ mass spectrum obtained using $pp$ collisions at center-of-mass energies of 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 9 fb$^{-1}$ recorded by the LHCb experiment. Referring to these states by their mass, the mass values are \begin{align*} m(\Omega_b(6316)^-) &= 6315.64\pm0.31\pm0.07\pm0.50 {\rm MeV}, \\ m(\Omega_b(6330)^-) &= 6330.30\pm0.28\pm0.07\pm0.50 {\rm MeV}, \\ m(\Omega_b(6340)^-) &= 6339.71\pm0.26\pm0.05\pm0.50 {\rm MeV}, \\ m(\Omega_b(6350)^-) &= 6349.88\pm0.35\pm0.05\pm0.50 {\rm MeV}, \end{align*}where the uncertainties are statistical, systematic and the last is due to the knowledge of the $\Xi_b^0$ mass. [...]
arXiv:2001.00851; LHCb-PAPER-2019-042; CERN-EP-2019-278; LHCB-PAPER-2019-042.- Geneva : CERN, 2020-02-26 - 12 p. - Published in : Phys. Rev. Lett. 124 (2020) 082002 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Search for $C\!P$ violation and observation of $P$ violation in $\Lambda_b^0 \to p \pi^- \pi^+ \pi^-$ decays / LHCb Collaboration
A search for $C\!P$ violation in the $\Lambda_b^0 \to p \pi^- \pi^+ \pi^-$ decay is performed using LHCb data corresponding to an integrated luminosity of 6.6$\,fb^{-1}$ collected in $pp$ collisions at centre-of-mass energies of 7, 8 and 13$\,Te\kern -0.1em V$. The analysis uses both triple product asymmetries and the unbinned energy test method. [...]
arXiv:1912.10741; LHCB-PAPER-2019-028; CERN-EP-2019-256; LHCB-PAPER-2019-028.- Geneva : CERN, 2020-09-09 - 12 p. - Published in : Phys. Rev. D 102 (2020) 051101 Article from SCOAP3: PDF; Fulltext: 1912.10741 - PDF; LHCb-PAPER-2019-028 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Test of lepton universality with $\Lambda^{0}_{b} \to p K^- \ell^+ \ell^-$ decays / LHCb Collaboration
The ratio of branching fractions of the decays $\Lambda^{0}_{b}\to pK^{-}e^{+}e^{-}$ and $\Lambda^{0}_{b}\to pK^{-}\mu^{+}\mu^{-}$, $R^{-1}_{pK}$, is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb$^{-1}$ recorded with the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. In the dilepton mass-squared range $0.1 < q^{2} < 6.0$ $GeV^{2}/c^{4}$ and the $pK^{-}$ mass range $m(pK^{-}) < 2600$ $MeV/c^{2}$, the ratio of branching fractions is measured to be $R^{-1}_{pK} = 1.17 ^{+0.18}_{-0.16} \pm 0.07$, where the first uncertainty is statistical and the second systematic. [...]
arXiv:1912.08139; LHCb-PAPER-2019-040; CERN-EP-2019-272; LHCB-PAPER-2019-040.- Geneva : CERN, 2020-05-11 - 26 p. - Published in : JHEP 2020 (2020) 040 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Measurement of $CP$ violation in $B^0\to D^{*\pm} D^{\mp}$ decays / LHCb Collaboration
The decay-time-dependent $CP$ asymmetry in $B^0 \to D^{*\pm}D^{\mp}$ decays is measured using a data set corresponding to an integrated luminosity of$9$fb$^{-1}$ recorded by the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The $CP$ parameters are measured as $ S_{D^*D} = -0.861 \pm 0.077\,\text{(stat)} \pm 0.019 \,\text{(syst)}\,, $ $ \Delta S_{D^*D} = 0.019 \pm 0.075 \,\text{(stat)} \pm 0.012 \,\text{(syst)}\,, $ $ C_{D^*D} = -0.059 \pm 0.092 \,\text{(stat)} \pm 0.020 \,\text{(syst)} \,, $ $ \Delta C_{D^*D} = -0.031 \pm 0.092 \,\text{(stat)} \pm 0.016\,\text{(syst)} \,, $ $ {\cal A}_{D^*D} = 0.008 \pm 0.014 \,\text{(stat)} \pm 0.006\,\text{(syst)}\,. [...]
arXiv:1912.03723; LHCb-PAPER-2019-036; CERN-EP-2019-264; LHCB-PAPER-2019-036.- 2020-03-25 - 28 p. - Published in : JHEP 2003 (2020) 147 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Fulltext from publisher

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Isospin amplitudes in $\Lambda_b^0\to J/\psi \Lambda(\Sigma^0)$ and $\Xi_b^0\to J/\psi \Xi^0(\Lambda)$ decays / LHCb Collaboration
Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions, and allow searches for physics beyond the Standard Model. We present the first results on isospin amplitudes in $b$-baryon decays, using data corresponding to an integrated luminosity of 8.5 fb$^{-1}$, collected with the LHCb detector in $pp$ collisions at center of mass energies of 7, 8 and 13 TeV. [...]
arXiv:1912.02110; CERN-EP-2019-268; LHCb-PAPER-2019-039; LHCB-PAPER-2019-039-003; LHCB-PAPER-2019-039.- Geneva : CERN, 2020-03-17 - 11 p. - Published in : Phys. Rev. Lett. 124 (2020) 111802 Article from SCOAP3: PDF; Fulltext: 1912.02110 - PDF; DI-PRL-cascade - PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP;

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10.

Precision measurement of the $\Xi_{cc}^{++}$ mass / LHCb Collaboration
A measurement of the $\Xi_{cc}^{++}$ mass is performed using data collected by the LHCb experiment between 2016 and 2018 in $pp$ collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.6 $\mathrm{fb}^{-1}$. The $\Xi_{cc}^{++}$ candidates are reconstructed via the decay modes $\Xi_{cc}^{++}\to\Lambda_c^+K^-\pi^+\pi^+$ and $\Xi_{cc}^{++}\to\Xi_c^+\pi^+$. [...]
arXiv:1911.08594; LHCb-PAPER-2019-037; CERN-EP-2019-258; LHCB-PAPER-2019-037.- 2020-02-07 - 18 p. - Published in : JHEP 2002 (2020) 049 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary Information: ZIP;

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Vea también: autores con nombres similares
50	Heister, A
859	Heister, Arno

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