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CERN Document Server 305 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 0.93 secondes. 
1.
Single $\Upsilon$-ray spectra from proton-proton collisions at centre-of-mass energies from 30 to 50 GeV / Neuhofer, G ; Niebergall, F ; Penzias, J ; Regler, M ; Schmidt-Parzefall, W ; Schubert, K R ; Schumacher, P E ; Teuer, M ; Winter, K
CERN-PRE-8739. - 1971. - 11 p.
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2.
Search for Darkonium in $e^+e^-$ Collisions / BABAR Collaboration
Collider searches for dark sectors, new particles interacting only feebly with ordinary matter, have largely focused on identifying signatures of new mediators, leaving much of dark sector structures unexplored. In particular, the existence of dark matter bound states (darkonia) remains to be investigated. [...]
arXiv:2106.08529; BABAR-PUB-21/002; SLAC-PUB-17608.- 2022-01-11 - 10 p. - Published in : Phys. Rev. Lett. 128 (2022) 021802 Fulltext: PDF;
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3.
Measurement of the $B^0 \to D^{*-} \tau^+ \nu_{\tau}$ branching fraction using three-prong $\tau$ decays / LHCb Collaboration
The ratio of branching fractions ${\cal{R}}(D^{*-})\equiv {\cal{B}}(B^0 \to D^{*-} \tau^+ \nu_{\tau})/{\cal{B}}(B^0 \to D^{*-} \mu^+\nu_{\mu})$ is measured using a data sample of proton-proton collisions collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3$~$fb$^{-1}$. The $\tau$ lepton is reconstructed with three charged pions in the final state. [...]
arXiv:1711.02505; CERN-EP-2017-256; LHCB-PAPER-2017-027.- 2018-04-26 - 26 p. - Published in : Phys. Rev. D 97 (2018) 072013 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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4.
Measurements of the branching fractions of $\Lambda_{c}^{+} \rightarrow p \pi^{-} \pi^{+}$, $\Lambda_{c}^{+} \rightarrow p K^{-} K^{+}$, and $\Lambda_{c}^{+} \rightarrow p \pi^{-} K^{+}$ / LHCb Collaboration
The ratios of the branching fractions of the decays $\Lambda_{c}^{+} \rightarrow p \pi^{-} \pi^{+}$, $\Lambda_{c}^{+} \rightarrow p K^{-} K^{+}$, and $\Lambda_{c}^{+} \rightarrow p \pi^{-} K^{+}$ with respect to the Cabibbo-favoured $\Lambda_{c}^{+} \rightarrow p K^{-} \pi^{+}$ decay are measured using proton-proton collision data collected with the LHCb experiment at a 7 TeV centre-of-mass energy and corresponding to an integrated luminosity of 1.0 fb$^{-1}$: \begin{align*} \frac{\mathcal{B}(\Lambda_{c}^{+} \rightarrow p \pi^{-} \pi^{+})}{\mathcal{B}(\Lambda_{c}^{+} \rightarrow p K^{-} \pi^{+})} & = (7.44 \pm 0.08 \pm 0.18)\,\%, \frac{\mathcal{B}(\Lambda_{c}^{+} \rightarrow p K^{-} K^{+})}{\mathcal{B}(\Lambda_{c}^{+} \rightarrow p K^{-} \pi^{+})} &= (1.70 \pm 0.03 \pm 0.03)\,\%, \frac{\mathcal{B}(\Lambda_{c}^{+} \rightarrow p \pi^{-} K^{+})}{\mathcal{B}(\Lambda_{c}^{+} \rightarrow p K^{-} \pi^{+})} & = (0.165 \pm 0.015 \pm 0.005 )\,\%, \end{align*} where the uncertainties are statistical and systematic, respectively. These results are the most precise measurements of these quantities to date. [...]
arXiv:1711.01157; CERN-EP-2017-247; LHCB-PAPER-2017-026; LHCB-PAPER-2017-026.- Geneva : CERN, 2018-03-08 - 22 p. Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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5.
First observation of forward $Z \rightarrow b \bar{b}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV / LHCb Collaboration
The decay $Z \rightarrow b \bar{b}$ is reconstructed in $pp$ collision data, corresponding to 2 fb$^{-1}$ of integrated luminosity, collected by the LHCb experiment at a centre-of-mass energy of $\sqrt{s}=8$ TeV. The product of the $Z$ production cross-section and the $Z \rightarrow b \bar{b}$ branching fraction is measured for candidates in the fiducial region defined by two particle-level $b$-quark jets with pseudorapidities in the range $2.2 < \eta < 4.2$, with transverse momenta $p_{T}>20$ GeV and dijet invariant mass in the range $45 < m_{jj} < 165$ GeV. [...]
arXiv:1709.03458; LHCB-PAPER-2017-024; CERN-EP-2017-211; LHCB-PAPER-2017-024.- Geneva : CERN, 2018-01-10 - 10 p. - Published in : Phys. Lett. B 776 (2018) 430-439 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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6.
Measurement of the shape of the $\Lambda_b^0\to\Lambda_c^+ \mu^- \overline{\nu}_{\mu}$ differential decay rate / LHCb Collaboration
A measurement of the shape of the differential decay rate and the associated Isgur-Wise function for the decay $\Lambda_b^0\to\Lambda_c^+\mu^-\overline{\nu}$ is reported, using data corresponding to $3 fb^{-1}$ collected with the LHCb detector in proton-proton collisions. The $\Lambda_c^+\mu^-\overline{\nu}$(+ anything) final states are reconstructed through the detection of a muon and a $\Lambda_c^+$ baryon decaying into $pK^-\pi^+$, and the decays $\Lambda_b^0\to\Lambda_c^+\pi^+\pi^-\mu^-\overline{\nu}$ are used to determine contributions from $\Lambda_b^0\to \Lambda_c^{\star+}\mu ^-\bar{\nu}$ decays. [...]
arXiv:1709.01920; CERN-EP-2017-164; LHCB-PAPER-2017-016; CERN-PH-EP-2017-164.- Geneva : CERN, 2017-12-13 - 15 p. - Published in : Phys. Rev. D 96 (2017) 112005 Fulltext: arXiv:1709.01920 - PDF; 10.1103_PhysRevD.96.112005 - PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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7.
Bose-Einstein correlations of same-sign charged pions in the forward region in $pp$ collisions at $\sqrt{s}$ = 7 TeV / LHCb Collaboration
Bose-Einstein correlations of same-sign charged pions, produced in proton-proton collisions at a 7 TeV centre-of-mass energy, are studied using a data sample collected by the LHCb experiment. The signature for Bose-Einstein correlations is observed in the form of an enhancement of pairs of like-sign charged pions with small four-momentum difference squared. [...]
arXiv:1709.01769; CERN-EP-2017-203; LHCB-PAPER-2017-025; LHCB-PAPER-2017-025.- Geneva : CERN, 2017-12-06 - 24 p. - Published in : JHEP 12 (2017) 025 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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8.
First observation of the rare purely baryonic decay $B^0 \to p \bar{p}$ / LHCb Collaboration
The first observation of the decay of a $B^0$ meson to a purely baryonic final state, $B^0 \to p \bar{p}$, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of 3.0 fb$^{-1}$. [...]
arXiv:1709.01156; LHCB-PAPER-2017-022; CERN-EP-2017-190; LHCB-PAPER-2017-022.- Geneva : CERN, 2017-12-04 - 10 p. - Published in : Phys. Rev. Lett. 119 (2017) 232001 Fulltext: 10.1103_PhysRevLett.119.232001 - PDF; arXiv:1709.01156 - PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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9.
Measurement of the $\Upsilon$ polarizations in $pp$ collisions at $\sqrt{s}$=7 and 8TeV / LHCb Collaboration
The polarization of the $\Upsilon(1S)$, $\Upsilon(2S)$ and $\Upsilon(3S) $mesons, produced in $pp$ collisions at centre-of-mass energies $\sqrt{s}$=7 and 8TeV, is measured using data samples collected by the LHCb experiment, corresponding to integrated luminosities of 1 and 2fb$^{-1}$, respectively. The measurements are performed in three polarization frames, using $\Upsilon\to\mu^+\mu^-$ decays in the kinematic region of the transverse momentum $p_{T}(\Upsilon)<30~GeV/c$, and rapidity $2.2< y^{(\Upsilon)}<4.5$. [...]
arXiv:1709.01301; CERN-EP-2017-210; LHCB-PAPER-2017-028; LHCB-PAPER-2017-028.- Geneva : CERN, 2017-12-20 - 61 p. - Published in : JHEP 12 (2017) 110 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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10.
Measurement of the ratio of the $B^0 \to D^{*-} \tau^+ \nu_{\tau}$ and $B^0 \to D^{*-} \mu^+ \nu_{\mu}$ branching fractions using three-prong $\tau$-lepton decays / LHCb Collaboration
The ratio of branching fractions ${\cal{R}}(D^{*-})\equiv {\cal{B}}(B^0 \to D^{*-} \tau^+ \nu_{\tau})/{\cal{B}}(B^0 \to D^{*-} \mu^+\nu_{\mu})$ is measured using a data sample of proton-proton collisions collected with the LHCb detector at center-of-mass energies of 7 and 8 Tev, corresponding to an integrated luminosity of 3$~$fb$^{-1}$. For the first time ${\cal{R}}(D^{*-})$ is determined using the $\tau$ lepton decays with three charged pions in the final state. [...]
arXiv:1708.08856; LHCB-PAPER-2017-017; CERN-EP-2017-212; LHCB-PAPER-2017-017.- Geneva : CERN, 2018-04-26 - 11 p. - Published in : Phys. Rev. Lett. 120 (2018) 171802 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP; Supplementary Information: ZIP; External link: Figures, tables and other information
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CERN Document Server : 305 notices trouvées   1 - 10suivantfin  aller vers la notice:
Voir aussi: noms d'auteurs similaires
17 Schubert, K
277 Schubert, K R
6 Schubert, K.R.
1 Schubert, Karl D
1 Schubert, Keith Evan
436 Schubert, Klaus R
1 Schubert, Konrad
81 Schubert, Konstantin
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