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CERN Document Server	Znaleziono 179 rekordów 1 - 10 skocz do rekordu:	Szukanie trwało 0.86 sekund.

Search for $B_{(s)}^{*0}\to \mu^+\mu^-$ in $B_c^+ \to \pi^+ \mu^+\mu^-$ decays / LHCb Collaboration
A search for the very rare $B^{*0}\to\mu^+\mu^-$ and $B_{s}^{*0}\to\mu^+\mu^-$ decays is conducted by analysing the $B_c^+\to \pi^+\mu^+\mu^-$ process. The analysis uses proton-proton collision data collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 $\text{fb}^{-1}$ [...]
arXiv:2409.17209; CERN-EP-2024-220; LHCb-PAPER-2024-026.- Geneva : CERN, 2025-01-13 - 16 p. - Published in : Eur. Phys. J. C 85 (2025) 20 Figures: ZIP; Fulltext: 2409.17209v1 - PDF; 2409.17209 - PDF; document - PDF;

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First determination of the spin-parity of ${\Xi}_{c}(3055)^{+0}$ baryonsFirst Determination of the Spin-Parity of <math display="inline"><mrow><msub><mrow><mi mathvariant="normal">Ξ</mi></mrow><mrow><mi>c</mi></mrow></msub><mo stretchy="false">(</mo><mn>3055</mn><msup><mrow><mo stretchy="false">)</mo></mrow><mrow><mo>+</mo><mo>,</mo><mn>0</mn></mrow></msup></mrow></math> Baryons / LHCb Collaboration
The ${{\Xi}_{b}^{0(-)}\to{\Xi}_{c}(3055)^{+(0)}(\to D^{+(0)}{\Lambda}){\pi}^{-}}$ decay chains are observed, and the spin-parity of ${\Xi}_{c}(3055)^{+(0)}$ baryons is determined for the first time. The measurement is performed using proton-proton collision data at a center-of-mass energy of $\sqrt{s}=13\,\text{TeV}$, corresponding to an integrated luminosity of $5.4\,\text{fb}^{-1}$, recorded by the $\text{LHCb}$ experiment between 2016 and 2018. [...]
arXiv:2409.05440; LHCb-PAPER-2024-018; CERN-EP-2024-215; LHCB-PAPER-2024-018.- Geneva : CERN, 2025-02-28 - 24 p. - Published in : Phys. Rev. Lett. 134 (2025) 081901 Fulltext: final_draft_for_arXiv - PDF; 2409.05440 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Measurement of exclusive $J/\psi$ and $\psi(2S)$ production at $\sqrt{s}=13$ TeV / LHCb Collaboration
Measurements are presented of the cross-section for the central exclusive production of $J/\psi\to\mu^+\mu^-$ and $\psi(2S)\to\mu^+\mu^-$ processes in proton-proton collisions at $\sqrt{s} = 13 $ TeV with 2016-2018 data. They are performed by requiring both muons to be in the LHCb acceptance (with pseudorapidity $2<\eta_{\mu^\pm} < 4.5$) and mesons in the rapidity range $2.0 < y < 4.5$. [...]
arXiv:2409.03496; LHCb-PAPER-2024-012; CERN-EP-2024-213.- Geneva : CERN, 2025-02-26 - 36 p. - Published in : SciPost Phys. 18 (2025) 071 Fulltext: 2409.03496v1 - PDF; LHCb-PAPER-2024-012-figures - ZIP; 2409.03496 - PDF; LHCb-PAPER-2024-012-supplementary-3 - ZIP; document - 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: LHCb-PAPER-2024-017 - PDF; 2409.02759 - PDF; Publication - PDF; Related data file(s): ZIP;

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Measurement of $CP$ violation observables in $D^+\to K^-K^+\pi^+$ decays / LHCb Collaboration
A search for violation of the charge-parity ($CP$) symmetry in the $D^+\rightarrow K^-K^+\pi^+$ decay is presented, with proton-proton collision data corresponding to an integrated luminosity of 5.4 fb$^{-1}$, collected at a center-of-mass energy of 13 TeV with the LHCb detector. A novel model-independent technique is used to compare the $D^+$ and $D^-$ phase-space distributions, with instrumental asymmetries subtracted using the $D^+{s}\rightarrow K^-K^+\pi^+$ decay as a control channel. [...]
arXiv:2409.01414; CERN-EP-2024-204; LHCb-PAPER-2024-019.- Geneva : CERN, 2024-12-16 - 13 p. - Published in : Phys. Rev. Lett. 133 (2024) 251801 Fulltext: 2409.01414v1 - PDF; 2409.01414 - PDF; Publication - PDF; Related data file(s): ZIP;

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Study of the rare decay $J\mskip -3mu/\mskip -2mu\psi \to \mu^+\mu^-\mu^+\mu^-$ / LHCb Collaboration
The rare electromagnetic $J\mskip -3mu/\mskip -2mu\psi \to \mu^+\mu^-\mu^+\mu^-$ decay is observed with a significance greatly exceeding the discovery threshold, using proton-proton collision data collected by the LHCb experiment during 2016--2018 at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of $5.4\,\text{fb}^{-1}$. The rate of this decay is measured relative to that of the $J\mskip -3mu/\mskip -2mu\psi \to \mu^+\mu^-$ mode. [...]
arXiv:2408.16646; LHCb-PAPER-2024-016; CERN-EP-2024-201; LHCB-PAPER-2024-016.- Geneva : CERN, 2024-12-10 - 26 p. - Published in : JHEP 2412 (2024) 062 Fulltext: LHCb-PAPER-2024-016_arxiv - PDF; 2408.16646 - PDF; document - PDF; Related data file(s): ZIP;

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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; LHCb-PAPER-2024-008 - PDF; Related data file(s): ZIP; Suppelementary information: ZIP;

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Study of charmonium production via the decay to $p\bar{p}$ at $\sqrt{s} = 13\,\rm{TeV}$ / LHCb Collaboration
Charmonium production cross-section in proton-proton collisions is measured at the centre-of-mass energy $\sqrt{s}=13\,\rm{TeV}$ using decays to $p\bar{p}$ final state. The study is performed using a data sample corresponding to an integrated luminosity of $2.2\,\rm{fb}^{-1}$ collected in 2018 with the $\mbox{LHCb}$ detector. [...]
arXiv:2407.14261; LHCb-PAPER-2024-004; CERN-EP-2024-165; LHCB-PAPER-2024-004.- Geneva : CERN, 2024-12-09 - 32 p. - Published in : Eur. Phys. J. C 84 (2024) 1274 Fulltext: LHCb_PAPER_2024-004 - PDF; 2407.14261 - PDF; document - PDF; Related data file(s): ZIP;

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Observation of Exotic <math display="inline"><mrow><mi>J</mi><mo>/</mo><mi>ψ</mi><mi>ϕ</mi></mrow></math> Resonant Structure in Diffractive Processes in Proton-Proton Collisions / LHCb Collaboration
The first study of $J/\psi\phi$ production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5 fb$^{-1}$. [...]
arXiv:2407.14301; LHCb-PAPER-2023-043; CERN-EP-2024-149.- Geneva : CERN, 2025-01-24 - 12 p. - Published in : Phys. Rev. Lett. 134 (2025) 031902 Fulltext: 2407.14301 - PDF; Publication - PDF; LHCb-PAPER-2023-043-arXiv-v2 - PDF; LHCb-PAPER-2023-043-Supplementary - ZIP; Related data file(s): ZIP;

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10.

Search for the rare decay of charmed baryon <math display="inline"><msubsup><mi mathvariant="normal">Λ</mi><mi>c</mi><mo>+</mo></msubsup></math> into the <math display="inline"><mi>p</mi><msup><mi>μ</mi><mo>+</mo></msup><msup><mi>μ</mi><mo>-</mo></msup></math> final state / LHCb Collaboration
A search for the nonresonant $\Lambda_c^+ \to p \mu^+ \mu^-$ decay is performed using proton-proton collision data recorded at a centre-of-mass energy of 13 TeV by the LHCb experiment, corresponding to an integrated luminosity of 5.4 fb$^{-1}$. No evidence for the decay is found in the dimuon invariant-mass regions where the expected contributions of resonances is subdominant. [...]
arXiv:2407.11474; LHCb-PAPER-2024-005; CERN-EP-2024-158; LHCB-PAPER-2024-005.- Geneva : CERN, 2024-09-01 - 13 p. - Published in : Phys. Rev. D 110 (2024) 052007 Fulltext: LHCb-PAPER-2024-005 - PDF; 2407.11474 - PDF; Publication - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Zobacz też: podobne nazwiska autorów
15	Butkevich, A
2	Butkevich, A G
20	Butkevich, A V
60	Butkevich, A.
6	Butkevich, A.G.
1	Butkevich, A.V.
4	Butkevich, Alexey G

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