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CERN Document Server 2,036 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 5.73 секунд. 
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Measurement of prompt-production cross-section ratio $\sigma(\chi_{c2})/\sigma(\chi_{c1})$ in $p$Pb collisions at $\sqrt{s_{NN}}$ = 8.16 TeV / LHCb Collaboration
This Letter reports the first measurement of prompt $\chi_{c1}$ and $\chi_{c2}$ charmonium production in nuclear collisions at LHC energies. The cross-section ratio $\sigma(\chi_{c2}) / \sigma(\chi_{c1})$ is measured in $p$Pb collisions at $\sqrt{s_{NN}}$~=~8.16~TeV, collected with the LHCb experiment. [...]
arXiv:2103.07349; LHCb-PAPER-2020-048; CERN-EP-2021-024F; CERN-EP-2021-024; LHCB-PAPER-2020-048.- 2021-06-09 - 18 p. - Published in : Phys. Rev. C 103 (2021) 064905 Article from SCOAP3: PDF; Fulltext: 2103.07349 - PDF; LHCb-PAPER-2020-048 - PDF; Related data file(s): ZIP;
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Search for long-lived particles decaying to $e^{\pm} \mu^{\mp} \nu$ / LHCb Collaboration
Long-lived particles decaying to $e^\pm \mu^\mp \nu$, with masses between 7 and 50 GeV/c$^2$ and lifetimes between 2 and 50 ps, are searched for by looking at displaced vertices containing electrons and muons of opposite charges. The search is performed using 5.4 fb$^{-1}$ of $pp$ collisions collected with the LHCb detector at a centre-of-mass energy of $\sqrt{s} = 13$ TeV. [...]
arXiv:2012.02696; LHCb-PAPER-2020-027; CERN-EP-2020-212.- Geneva : CERN, 2021-03-26 - 16 p. - Published in : Eur. Phys. J. C 81 (2021) 261 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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First observation of the decay $B_s^0 \to K^-\mu^+\nu_\mu$ and measurement of $|V_{ub}|/|V_{cb}|$ / LHCb Collaboration
The first observation of the suppressed semileptonic $B_s^0 \to K^-\mu^+\nu_\mu$ decay is reported. Using a data sample recorded in $pp$ collisions in 2012 with the LHCb detector, corresponding to an integrated luminosity of 2 $\mathrm{fb}^{-1}$, the branching fraction $\mathcal{B}(B_s^0 \to K^-\mu^+\nu_\mu)$} is measured to be $(1.06\pm0.05~(\mathrm{stat})\pm0.08~(\mathrm{syst}))\times 10^{-4}$, where the first uncertainty is statistical and the second one represents the combined systematic uncertainties. [...]
arXiv:2012.05143; LHCb-PAPER-2020-038; CERN-EP-2020-224; CERN-EP-2020-224; LHCB-PAPER-2020-038.- Geneva : CERN, 2021-02-25 - 11 p. - Published in : Phys. Rev. Lett. 126 (2021) 081804 Article from SCOAP3: PDF; Fulltext: LHCb-PAPER-2020-038 - PDF; 2012.05143 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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Measurement of the CKM angle $\gamma$ in $B^\pm\to D K^\pm$ and $B^\pm \to D \pi^\pm$ decays with $D \to K_\mathrm S^0 h^+ h^-$ / LHCb Collaboration
A measurement of $CP$-violating observables is performed using the decays ${B^\pm\to D K^\pm}$ and ${B^\pm\to D \pi^\pm}$, where the $D$ meson is reconstructed in one of the self-conjugate three-body final states $K_{\mathrm S}^0\pi^+\pi^-$ and $K_{\mathrm S}^0K^+K^-$ (commonly denoted $K_{\mathrm S}^0 h^+h^-$). The decays are analysed in bins of the $D$-decay phase space, leading to a measurement that is independent of the modelling of the $D$-decay amplitude. [...]
arXiv:2010.08483; LHCb-PAPER-2020-019; CERN-EP-2020-175; LHCB-PAPER-2020-019.- Geneva : CERN, 2021-02-19 - 36 p. - Published in : JHEP 2102 (2021) 169 Article from SCOAP3: PDF; Fulltext: 2010.08483 - PDF; LHCb-PAPER-2020-019_arxiv_submission - PDF; Related data files: ZIP; Supplementary information: ZIP;
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Measurement of the branching fraction of the $B^{0}\rightarrow D_{s}^{+}\pi^{-}$ decay / LHCb Collaboration
A branching fraction measurement of the $B^{0}\rightarrow D_{s}^{+}\pi^{-}$ decay is presented using proton-proton collision data collected with the LHCb experiment, corresponding to an integrated luminosity of $5.0\,$fb$^{-1}$. The branching fraction is found to be ${\mathcal{B}(B^{0}\rightarrow D_{s}^{+}\pi^{-}) = (19.4 \pm 1.8\pm 1.3 \pm 1.2)\times 10^{-6}}$, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the $B^0 \to D^{-}\pi^{+}$, $D_{s}^{+}\rightarrow K^{+}K^{-}\pi^{+}$ and $D^{-}\rightarrow K^{+}\pi^{-}\pi^{-}$ branching fractions. [...]
arXiv:2010.11986; LHCb-PAPER-2020-021; CERN-EP-2020-183; LHCB-PAPER-2020-021.- Geneva : CERN, 2021-04-12 - 15 p. - Published in : Eur. Phys. J. C 81 (2021) 314 Article from SCOAP3: PDF; Fulltext: 2010.11986 - PDF; Bd2DsPi_Paper_v4.0 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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Report from Working Group 2 : Higgs Physics at the HL-LHC and HE-LHC / Cepeda, M. (CERN ; Madrid, CIEMAT) ; Gori, S. (UC, Santa Cruz, Inst. Part. Phys.) ; Ilten, P. (Birmingham U.) ; Kado, M. (Orsay, LAL ; INFN, Rome ; Rome U.) ; Riva, F. (Geneva U., Dept. Theor. Phys.) ; Abdul Khalek, R. (Vrije U., Amsterdam ; Nikhef, Amsterdam) ; Aboubrahim, A. (Northeastern U. (main)) ; Alimena, J. (Ohio State U., Columbus (main)) ; Alioli, S. (Milan Bicocca U.) ; Alves, A. (U. Sao Paulo (main)) et al.
The discovery of the Higgs boson in 2012, by the ATLAS and CMS experiments, was a success achieved with only a percent of the entire dataset foreseen for the LHC. It opened a landscape of possibilities in the study of Higgs boson properties, Electroweak Symmetry breaking and the Standard Model in general, as well as new avenues in probing new physics beyond the Standard Model. [...]
arXiv:1902.00134; CERN-LPCC-2018-04.- Geneva : CERN, 2019-12-02 - 364 p. - Published in : CERN Yellow Rep. Monogr. 7 (2019) 221-584 Fulltext: PDF; Preprint: PDF; final document: PDF; External link: Published fulltext
In : HL/HE-LHC Workshop : Workshop on the Physics of HL-LHC, and Perspectives at HE-LHC, Geneva, Switzerland, 18 - 20 Jun 2018
Report on the Physics at the HL-LHC, and Perspectives for the HE-LHC, Geneva, Switzerland, 18 - 20 Jun 2018, pp.221-584
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First measurement of $Z \to \mu^+\mu^-$ angular coefficients in the forward region of $pp$ collisions at $\sqrt{s} = 13$ TeV / LHCb Collaboration
The first study of the angular distribution of $\mu^+ \mu^-$ pairs produced in the forward rapidity region via the Drell-Yan reaction $pp \rightarrow \gamma^{*}/Z +X \rightarrow l^+ l^- + X$ is presented, using data collected with the LHCb detector at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.1 $\rm{fb}^{-1}$. The coefficients of the five leading terms in the angular distribution are determined as a function of the dimuon transverse momentum and rapidity. [...]
arXiv:2203.01602; LHCb-PAPER-2021-048; CERN-EP-2022-030; LHCB-PAPER-2021-048.- 2022-08-24 - 11 p. - Published in : Phys. Rev. Lett. 129 (2022) 091801 Fulltext: PDF; Related data file(s): ZIP; External link: Previous draft version
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SND@LHC: The Scattering and Neutrino Detector at the LHC / SND@LHC Collaboration
SND@LHC is a compact and stand-alone experiment designed to perform measurements with neutrinos produced at the LHC in the pseudo-rapidity region of ${7.2 < \eta < 8.4}$. The experiment is located 480 m downstream of the ATLAS interaction point, in the TI18 tunnel. [...]
arXiv:2210.02784.- 2024-05-23 - 57 p. - Published in : JINST 19 (2024) P05067 Fulltext: 2210.02784 - PDF; document - PDF;
In : The Large Hadron Collider and The Experiments for Run 3
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Observation of the decay $ \Lambda_b^0\rightarrow \Lambda_c^+\tau^-\overline{\nu}_{\tau}$ / LHCb Collaboration
The first observation of the semileptonic $b$-baryon decay $ \Lambda_b^0 \rightarrow \Lambda_c^+ \tau^-\overline{\nu}_{\tau}$, with a significance of $6.1\,\sigma$, is reported using a data sample corresponding to 3 fb$^{-1}$ of integrated luminosity, collected by the LHCb experiment at centre-of-mass energies of 7 and 8~TeV at the LHC. The $\tau^-$ lepton is reconstructed in the hadronic decay to three charged pions. [...]
arXiv:2201.03497; LHCb-PAPER-2021-044; CERN-EP-2021-265; LHCB-PAPER-2021-044.- Geneva : CERN, 2022-05-13 - 21 p. - Published in : Phys. Rev. Lett. 128 (2022) 191803 Fulltext: 2201.03497 - PDF; PhysRevLett.128.191803 - PDF; Related data file(s): ZIP; Supplementary material: ZIP;
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Searches for rare $ {B}_s^0 $ and B$^{0}$ decays into four muons / LHCb Collaboration
Searches for rare $B_s^0$ and $B^0$ decays into four muons are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 $\text{fb}^{-1}$. Direct decays and decays via light scalar and $J/\psi$ resonances are considered. [...]
arXiv:2111.11339; LHCb-PAPER-2021-039; CERN-EP-2021-236.- 2022-03-17 - 27 p. - Published in : JHEP 2203 (2022) 109 Fulltext: 2111.11339 - PDF; document - PDF; Fulltext from publisher: PDF; Related data file(s): ZIP;
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