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CERN Document Server 378 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 0.58 секунд. 
1.
Angular Analysis of $D^0 \to \pi^+\pi^-\mu^+\mu^-$ and $D^0 \to K^+K^-\mu^+\mu^-$ Decays and Search for $CP$ Violation / LHCb Collaboration
The first full angular analysis and an updated measurement of the decay-rate $CP$ asymmetry of the $D^0 \to \pi^+\pi^-\mu^+\mu^-$ and $D^0 \to K^+K^-\mu^+\mu^-$ decays are reported. The analysis uses proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV. [...]
arXiv:2111.03327; LHCb-PAPER-2021-035; CERN-EP-2021-212.- 2022-06-03 - 11 p. - Published in : Phys. Rev. Lett. 128 (2022) 221801 Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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2.
Measurement of the charge asymmetry of electrons from the decays of $W$ bosons produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV / CDF Collaboration
At the Fermilab Tevatron proton-antiproton ($p\bar{p}$) collider, high-mass electron-neutrino ($e\nu$) pairs are produced predominantly in the process $p \bar{p} \rightarrow W(\rightarrow e\nu) + X$. The asymmetry of the electron and positron yield as a function of their pseudorapidity constrain the slope of the ratio of the $u$- to $d$-quark parton distributions versus the fraction of the proton momentum carried by the quarks. [...]
arXiv:2107.04678; FERMILAB-PUB-21-293-E.- 2021-11-01 - 27 p. - Published in : Phys. Rev. D 104 (2021) 092002 Fulltext: Fulltext - PDF; fermilab-pub-21-293-e - PDF; 2107.04678 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
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3.
Observation of the Mass Difference Between Neutral Charm-Meson Eigenstates / LHCb Collaboration
A measurement of mixing and $C\!P$ violation in neutral charm mesons is performed using data reconstructed in proton-proton collisions collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of 5.4$\textrm{fb}^{-1}$. A total of $30.6$ million $D^{0}\rightarrow K^{0}_{\mathrm{S}}\pi^{+}\pi^{-}$ decays are analyzed using a method optimized for the measurement of the mass difference between neutral charm-meson eigenstates. [...]
arXiv:2106.03744; LHCb-PAPER-2021-009; CERN-EP-2021-099; LHCB-PAPER-2021-009.- Geneva : CERN, 2021-09-07 - 12 p. - Published in : Phys. Rev. Lett. Fulltext: LHCb-PAPER-2021-009_v3 - PDF; 2106.03744 - PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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4.
Searches for 25 rare and forbidden decays of $D^{+}$ and $ {D}_s^{+} $ mesons / LHCb Collaboration
A search is performed for rare and forbidden charm decays of the form $D_{(s)}^+ \to h^\pm \ell^+ \ell^{(\prime)\mp}$, where $h^\pm$ is a pion or kaon and $\ell^{(')\pm}$ is an electron or muon. The measurements are performed using proton-proton collision data, corresponding to an integrated luminosity of $1.6\text{fb}^{-1}$, collected by the LHCb experiment in 2016. [...]
arXiv:2011.00217; LHCb-PAPER-2020-007; CERN-EP-2020-140.- 2021-06-07 - 24 p. - Published in : JHEP 2106 (2021) 044 Article from SCOAP3: PDF; Fulltext: PDF;
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5.
Observation of enhanced double parton scattering in proton-lead collisions at $\sqrt{s_\mathrm{NN}}=8.16$ TeV / LHCb Collaboration
A study of prompt charm-hadron pair production in proton-lead collisions at $\sqrt{s_\mathrm{NN}}= 8.16$ TeV is performed using data corresponding to an integrated luminosity of about 30 nb${}^{-1}$, collected with the LHCb experiment. Production cross-sections for different pairs of charm hadrons are measured and kinematic correlations between the two charm hadrons are investigated. [...]
arXiv:2007.06945; LHCb-PAPER-2020-010; CERN-EP-2020-119; LHCB-PAPER-2020-010.- Geneva : CERN, 2020-11-20 - 13 p. - Published in : Phys. Rev. Lett. 125 (2020) 212001 Article from SCOAP3: PDF; Fulltext: 2007.06945 - PDF; Paper-2020-010 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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6.
Observation of structure in the $J/\psi$-pair mass spectrum / LHCb Collaboration
Using proton-proton collision data at centre-of-mass energies of $\sqrt{s} = 7$, $8$ and $13\mathrm{\,TeV}$ recorded by the LHCb experiment at the Large Hadron Collider, corresponding to an integrated luminosity of $9\mathrm{\,fb}^{-1}$, the invariant mass spectrum of $J/\psi$ pairs is studied. A narrow structure around $6.9\mathrm{\,GeV/}c^2$ matching the lineshape of a resonance and a broad structure just above twice the $J/\psi$ mass are observed. [...]
arXiv:2006.16957; CERN-EP-2020-115; LHCb-PAPER-2020-011; LHCB-PAPER-2020-011.- Geneva : CERN, 2020-12-15 - 11 p. - Published in : Sci. Bull. 65 (2020) 1983-1993 Fulltext: PDF; Related data file(s): ZIP; External link: Press Release
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7.
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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8.
Study of the $\psi_2(3823)$ and $\chi_{c1}(3872)$ states in $B^+\to (J/\psi \pi^+\pi^-)K^+$ decays / LHCb Collaboration
The decays $B^+\rightarrow J/\psi \pi^+ \pi^- K^+$ are studied using a data set corresponding to an integrated luminosity of 9 fb$^{-1}$ collected with the LHCb detector in proton-proton collisions between 2011 and 2018. Precise measurements of the ratios of branching fractions with the intermediate $\psi_2(3823)$, $\chi_{c1}(3872)$ and $\psi(2S)$ states are reported. [...]
arXiv:2005.13422; CERN-EP-2020-071; LHCb-PAPER-2020-009; LHCB-PAPER-2020-009.- Geneva : CERN, 2020-08-25 - 29 p. - Published in : JHEP 2008 (2020) 123 Article from SCOAP3: PDF; Fulltext: LHCb-PAPER-2020-009 - PDF; 2005.13422 - PDF; Related data files: ZIP; Supplementary information: ZIP; External link: Interactions.org article
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9.
Measurement of the branching fractions for $B^+\to D^{*+}D^-K^+$, $B^+\to D^{*-}D^+K^+$, and $B^0\to D^{*-}D^0K^+$ decays / LHCb Collaboration
A measurement of four branching-fraction ratios for three-body decays of $B$ mesons involving two open-charm hadrons in the final state is presented. Run 1 and Run 2 $pp$ collision data are used, recorded by the LHCb experiment at centre-of-mass energies $7$, $8$, and $13$ TeV and corresponding to an integrated luminosity of $9.1$ fb$^{-1}$. [...]
arXiv:2005.10264; LHCb-PAPER-2020-006; CERN-EP-2020-056; LHCB-PAPER-2020-006.- Geneva : CERN, 2020-12-21 - 22 p. - Published in : JHEP 2012 (2020) 139 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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10.
Measurement of the $\Lambda^0_b\rightarrow J/\psi\Lambda$ angular distribution and the $\Lambda^0_b$ polarisation in $pp$ collisions / LHCb Collaboration
This paper presents an analysis of the $\Lambda^0_b\rightarrow J/\psi\Lambda$ angular distribution and the transverse production polarisation of $\Lambda^0_b$ baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to an integrated luminosity of 4.9 fb$^{-1}$, collected with the LHCb experiment. [...]
arXiv:2004.10563; LHCb-PAPER-2020-005; CERN-EP-2020-051; LHCB-PAPER-2020-005.- Geneva : CERN, 2020-06-17 - 30 p. - Published in : JHEP 2006 (2020) 110 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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