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CERN Document Server 2,051 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 0.58 секунд. 
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High-density gas target at the LHCb experiment / Boente Garcia, O. (LLR, Palaiseau) ; Bregliozzi, G. (CERN) ; Calegari, D. (CERN) ; Carassiti, V. (INFN, Ferrara) ; Ciullo, G. (INFN, Ferrara ; Ferrara U.) ; Coco, V. (CERN) ; Collins, P. (CERN) ; Pinto, P. Costa (CERN) ; De Angelis, C. (Cagliari U. ; INFN, Cagliari) ; Di Nezza, P. (Frascati) et al.
The recently installed internal gas target at LHCb presents exceptional opportunities for an extensive physics program for heavy-ion, hadron, spin, and astroparticle physics. A storage cell placed in the LHC primary vacuum, an advanced Gas Feed System, the availability of multi-TeV proton and ion beams and the recent upgrade of the LHCb detector make this project unique worldwide. [...]
arXiv:2407.14200; LHCb-DP-2024-002.- 2024-11-01 - 22 p. - Published in : Phys. Rev. Accel. Beams 27 (2024) 111001 Fulltext: 2407.14200 - PDF; Publication - PDF;
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Measurement of $\Lambda_b^0$, $\Lambda_c^+$ and $\Lambda$ decay parameters using $\Lambda_b^0 \to \Lambda_c^+h^-$ decays / LHCb Collaboration
A comprehensive study of the angular distributions in the bottom-baryon decays $\it{\Lambda}^\mathrm{0}_b\to\it{\Lambda}_c^+ h^-(h=\pi, K)$, followed by $\it{\Lambda}_c^+\to\it{\Lambda} h^+$ with $\it{\Lambda}\to \it{p} \pi^-$ or $\it{\Lambda}_c^+\to\it{p}\it{K}^0_\mathrm{S}$ decays, is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 9 $\mathrm{fb}^{-1}$ collected by the LHCb experiment at center-of-mass energies of 7, 8 and 13 $\mathrm{Te\kern -0.1em V}$. The decay parameters and the associated charge-parity ($CP$) asymmetries are measured, with no significant $CP$ violation observed. [...]
arXiv:2409.02759; LHCb-PAPER-2024-017; CERN-EP-2024-200.- Geneva : CERN, 2024-12-30 - 15 p. - Published in : Phys. Rev. Lett. 133 (2024) 261804 Fulltext: 2409.02759 - PDF; Publication - PDF; Related data file(s): ZIP;
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Probing Strangeness Hadronization with Event-by-Event Production of Multistrange Hadrons / ALICE Collaboration
This Letter presents the first measurement of event-by-event fluctuations of the net number (difference between the particle and antiparticle multiplicities) of multistrange hadrons $\Xi^-$ and $\overline{\Xi}^+$ and its correlation with the net-kaon number using the data collected by the ALICE Collaboration in pp, p-Pb, and Pb-Pb collisions at a center-of-mass energy per nucleon pair $\sqrt{s_{\mathrm{NN}}}=5.02\ \mathrm{TeV}$. The statistical hadronization model with a correlation over three units of rapidity between hadrons having the same and opposite strangeness content successfully describes the results. [...]
arXiv:2405.19890; CERN-EP-2024-151.- Geneva : CERN, 2025-01-17 - 14 p. - Published in : Phys. Rev. Lett. 134 (2025) 022303 Draft (restricted): PDF; Fulltext: 2405.19890 - PDF; Publication - PDF;
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Measurement of <math display="inline"><mrow><msup><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow></msup><mo>-</mo><msup><mrow><mover accent="true"><mrow><mi>D</mi></mrow><mrow><mo stretchy="false">¯</mo></mrow></mover></mrow><mrow><mn>0</mn></mrow></msup></mrow></math> mixing and search for <math display="inline"><mi>C</mi><mi>P</mi></math> violation with <math display="inline"><mrow><msup><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow></msup><mo stretchy="false">→</mo><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>-</mo></mrow></msup></mrow></math> decays / LHCb Collaboration
A measurement of the time-dependent ratio of the $D^0\rightarrow K^+\pi^-$ to $\overline{D}^0\rightarrow K^+\pi^-$ decay rates is reported. The analysis uses a sample of proton-proton collisions corresponding to an integrated luminosity of 6 fb$^{-1}$ recorded by the LHCb experiment from 2015 through 2018 at a center-of-mass energy of 13 TeV. [...]
arXiv:2407.18001; LHCb-PAPER-2024-008; CERN-EP-2024-178; LHCB-PAPER-2024-008.- Geneva : CERN, 2025-01-01 - 25 p. - Published in : Phys. Rev. D 111 (2025) 012001 Fulltext: 2407.18001 - PDF; Publication - PDF; Related data file(s): ZIP; Suppelementary information: ZIP;
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Measurement of the branching fraction ratios $R(D^+)$ and $R(D^{*+})$ using muonic $\tau$ decays / LHCb Collaboration
The branching fraction ratios of $\kern 0.18em \overline{\kern -0.18em B}{}^0\to D^+\tau^-\overline{\nu}_{\tau}$ and $\kern 0.18em \overline{\kern -0.18em B}{}^0\to D^{*+}\tau^-\overline{\nu}_{\tau}$ decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fb$^{-1}$ collected by the LHCb experiment in proton-proton collisions at $\sqrt{s} = 13\,\text{TeV}$. The reconstructed final states are formed by combining $D^+$ mesons with $\tau^-\to\mu^-\overline{\nu}_{\mu}\nu_{\tau}$ candidates, where the $D^+$ is reconstructed via the $D^+\to K^-\pi^+\pi^+$ decay. [...]
arXiv:2406.03387; LHCb-PAPER-2024-007; CERN-EP-2024-125; LHCB-PAPER-2024-007.- Geneva : CERN, 2025-02-10 - 22 p. - Published in : Phys. Rev. Lett. 134 (2025) 061801 Fulltext: 2406.03387 - PDF; Publication - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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Measurement of $\Omega^{0}_{\rm c}$ baryon production and branching-fraction ratio ${\rm BR}(\Omega^0_{\rm c} \rightarrow \Omega^{-}{\rm e}^{+}\nu_{\rm e})/ {\rm BR}(\Omega^0_{\rm c} \rightarrow \Omega^{-}{\pi}^{+})$ in pp collisions at $\sqrt{s} =$ 13 TeV / ALICE Collaboration
The inclusive production of the charm-strange baryon $\Omega^0_{\rm c}$ is measured for the first time via its semileptonic decay into $\Omega^{-}\rm e^{+}\nu_{e}$ at midrapidity ($|y|<0.8$) in proton-proton (pp) collisions at the centre-of-mass energy $\sqrt{s}=13$ TeV with the ALICE detector at the LHC. The transverse momentum ($p_{\rm T}$) differential cross section multiplied by the branching ratio is presented in the interval $2<p_{\rm T}<12$ GeV/$c$. [...]
arXiv:2404.17272; CERN-EP-2024-112.- Geneva : CERN, 2024-08-01 - 15 p. - Published in : Phys. Rev. D 110 (2024) 032014 Draft (restricted): PDF; Fulltext: 2404.17272 - PDF; Publication - PDF;
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Particle production as a function of charged-particle flattenicity in pp collisions at $\sqrt{s}$ = 13 TeV / ALICE Collaboration
This paper reports the first measurement of the transverse momentum ($p_{\mathrm{T}}$) spectra of primary charged pions, kaons, (anti)protons, and unidentified particles as a function of the charged-particle flattenicity in pp collisions at $\sqrt{s}=13$ TeV. Flattenicity is a novel event shape observable that is measured in the pseudorapidity intervals covered by the V0 detector, $2.8<\eta<5.1$ and $-3.7<\eta<-1.7$. [...]
arXiv:2407.20037; CERN-EP-2024-205.- Geneva : CERN, 2025-01-01 - 22 p. - Published in : Phys. Rev. D 111 (2025) 012010 Draft (restricted): PDF; Fulltext: 2407.20037 - PDF; Publication - PDF;
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Studying the interaction between charm and light-flavor mesons / ALICE Collaboration
The two-particle momentum correlation functions between charm mesons ($\mathrm{D^{*\pm}}$ and $\mathrm{D}^\pm$) and charged light-flavor mesons ($\pi^{\pm}$ and K$^{\pm}$) in all charge-combinations are measured for the first time by the ALICE Collaboration in high-multiplicity proton-proton collisions at a center-of-mass energy of $\sqrt{s} =13$ TeV. For $\mathrm{DK}$ and $\mathrm{D^*}\mathrm{K}$ pairs, the experimental results are in agreement with theoretical predictions of the residual strong interaction based on quantum chromodynamics calculations on the lattice and chiral effective field theory. [...]
arXiv:2401.13541; CERN-EP-2024-013.- Geneva : CERN, 2024-08-01 - 26 p. - Published in : Phys. Rev. D 110 (2024) 032004 Draft (restricted): PDF; Fulltext: 2401.13541 - PDF; Publication - PDF;
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Exploring the Strong Interaction of Three-Body Systems at the LHC / ALICE Collaboration
Deuterons are atomic nuclei composed of a neutron and a proton held together by the strong interaction. Unbound ensembles composed of a deuteron and a third nucleon have been investigated in the past using scattering experiments and they constitute a fundamental reference in nuclear physics to constrain nuclear interactions and the properties of nuclei. [...]
arXiv:2308.16120; CERN-EP-2023-181.- Geneva : CERN, 2024-07-01 - 18 p. - Published in : Phys. Rev. X 14 (2024) 031051 Draft (restricted): PDF; Fulltext: 2308.16120 - PDF; Publication - PDF;
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Measurement of the effective leptonic weak mixing angle / LHCb Collaboration
Using $pp$ collision data at $\sqrt{s}=13$~TeV, recorded by the LHCb experiment between 2016 and 2018 and corresponding to an integrated luminosity of $5.4$~fb$^{-1}$, the forward-backward asymmetry in the $pp \to Z/\gamma^{*} \to \mu^+\mu^-$ process is measured. The measurement is carried out in ten intervals of the difference between the muon pseudorapidities, within a fiducial region covering dimuon masses between $66$ and $116$ GeV, muon pseudorapidities between $2.0$ and $4.5$ and muon transverse momenta above $20$ GeV. [...]
arXiv:2410.02502; LHCb-PAPER-2024-028; CERN-EP-2024-230.- Geneva : CERN, 2024-12-03 - 28 p. - Published in : JHEP 2412 (2024) 026 Fulltext: 2410.02502 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: LHCb-PAPER-2024-028-supplementary - ZIP; supplementary (3) - PDF;
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