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CERN Document Server Znaleziono 395 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 1.33 sekund. 
1.
Measurement of the $Z$ boson production cross-section in $pp$ collisions at $\sqrt{s} = 5.02$ TeV / LHCb Collaboration
The first measurement of the $Z$ boson production cross-section at centre-of-mass energy $\sqrt{s} = 5.02\,$TeV in the forward region is reported, using $pp$ collision data collected by the LHCb experiment in year 2017, corresponding to an integrated luminosity of $100 \pm 2\,\rm{pb^{-1}}$. The production cross-section is measured for final-state muons in the pseudorapidity range $2.0<\eta<4.5$ with transverse momentum $p_{\rm{T}}> 20\,\rm{GeV/}\it{c}$. [...]
arXiv:2308.12940; LHCb-PAPER-2023-010; CERN-EP-2023-141; LHCB-PAPER-2023-010.- Geneva : CERN, 2024-02-13 - 38 p. - Published in : JHEP 2402 (2024) 070 Fulltext: 2308.12940 - PDF; LHCb-PAPER-2023-010 - PDF; Publication - PDF; Related data file(s): ZIP;
2.
Measurement of the CKM angle $\gamma$ using the $B^{\pm}\rightarrow D^*h^{\pm}$ channels / LHCb Collaboration
A measurement of the $CP$-violating observables from $B^{\pm}\rightarrow D^* K^{\pm}$ and $\mbox{$B^{\pm}\rightarrow D^* \pi^{\pm}$}$ decays is presented, where $D^* (D) $ is an admixture of $D^{*0}$ and $\bar{D}^{*0}$ ($D^0$ and $\bar{D}^0$) states and is reconstructed through the decay chains $ D^* \rightarrow D\pi^0/\gamma$ and $\mbox{$D \to K_S^0 \pi^+\pi^-/K_S^0 K^+K^-$}$. The measurement is performed by analysing the signal yield variation across the $D$ decay phase space and is independent of any amplitude model. [...]
arXiv:2310.04277; LHCb-PAPER-2023-012; CERN-EP-2023-170.- Geneva : CERN, 2023-12-01 - 32 p. - Published in : JHEP 2312 (2023) 13 Fulltext: 2310.04277 - PDF; document - PDF; Publication - PDF; latex_B2Dsth_JHEP - PDF; Related data file(s): ZIP;
3.
Measurement of prompt $D^+$ and $D^+_{s}$ production in $p\mathrm{Pb}$ collisions at $\sqrt {s_{\mathrm{NN}}}=5.02\,$TeV / LHCb Collaboration
The production of prompt $D^+$ and $D^+_{s}$ mesons is studied in proton-lead collisions at a centre-of-mass energy of $\sqrt {s_{\mathrm{NN}}}=5.02\,$TeV. The data sample corresponding to an integrated luminosity of $(1.58\pm0.02)\mathrm{nb}^{-1}$ is collected by the LHCb experiment at the LHC. [...]
arXiv:2309.14206; CERN-EP-2023-142; LHCb-PAPER-2023-006.- 2024-01-15 - 45 p. - Published in : JHEP 2401 (2024) 070 Fulltext: document - PDF; 2309.14206 - PDF;
4.
Measurement of the CKM angle $\gamma$ in the $B^0 \to DK^{*0}$ channel using self-conjugate $D \to K_S^0 h^+h^-$ decays / LHCb Collaboration
A model-independent study of CP violation in $B^0 \to DK^{*0}$ decays is presented using data corresponding to an integrated luminosity of 9fb$^{-1}$ collected by the LHCb experiment at centre-of-mass energies of $\sqrt{s}=7, \, 8$ and $13$ TeV. The CKM angle $\gamma$ is determined by examining the distributions of signal decays in phase-space bins of the self-conjugate $D \to K_S^0 h^+ h^-$ decays, where $h = \pi, K$. [...]
arXiv:2309.05514; LHCb-PAPER-2023-009; CERN-EP-2023-138.- Geneva : CERN, 2024-02-29 - 29 p. - Published in : Eur. Phys. J. C 84 (2024) 206 Fulltext: document - PDF; 2309.05514 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
5.
Observation of Cabibbo-suppressed two-body hadronic decays and precision mass measurement of the $\Omega_{c}^{0}$ baryon / LHCb Collaboration
The first observation of the singly Cabibbo-suppressed $\Omega_{c}^{0}\to\Omega^{-}K^{+}$ and $\Omega_{c}^{0}\to\Xi^{-}\pi^{+}$ decays is reported, using proton-proton collision data at a center-of-mass energy of $13\,{\rm TeV}$, corresponding to an integrated luminosity of $5.4\,{\rm fb}^{-1}$, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be $\frac{\mathcal{B}(\Omega_{c}^{0}\to\Omega^{-}K^{+})}{\mathcal{B}(\Omega_{c}^{0}\to\Omega^{-}\pi^{+})}=[6.08\pm0.51({\rm stat})\pm 0.40({\rm syst})]\%$, $\frac{\mathcal{B}(\Omega_{c}^{0}\to\Xi^{-}\pi^{+})}{\mathcal{B}(\Omega_{c}^{0}\to\Omega^{-}\pi^{+})}=[15.81\pm0.87({\rm stat})\pm0.44({\rm syst})\pm0.16({\rm ext})]\%$. [...]
arXiv:2308.08512; LHCb-PAPER-2023-011; CERN-EP-2023-155.- Geneva : CERN, 2024-02-23 - 18 p. - Published in : Phys. Rev. Lett. 132 (2024) 081802 Fulltext: 2308.08512 - PDF; LHCb-PAPER-2023-011(arXiv-2308.08512) - PDF; Publication - PDF; Related data file(s): ZIP;
6.
A search for rare $B \to D \mu^+\mu^-$ decays / LHCb Collaboration
A search for rare $B \rightarrow D \mu^+ \mu^-$ decays is performed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb$^{-1}$. No significant signals are observed in the non-resonant $\mu^+\mu^-$ modes, and upper limits of $\mathcal{B}(B^0 \rightarrow \overline{D}^0 \mu^+ \mu^-) < 5.1 \times 10^{-8}$, $\mathcal{B}(B^+ \rightarrow D_s^+ \mu^+ \mu^-) < 3.2 \times 10^{-8}$, $\mathcal{B}(B_s^0 \rightarrow \overline{D}^0 \mu^+ \mu^-) < 1.6 \times 10^{-7}$ and $f_c/f_u \cdot \mathcal{B}(B_c^+ \rightarrow D_s^+ \mu^+ \mu^-) < 9.6 \times 10^{-8}$ are set at the 95 % confidence level, where $f_c$ and $f_u$ are the fragmentation fractions of a $B$ meson with a $c$ and $u$ quark respectively in proton-proton collisions. [...]
arXiv:2308.06162; LHCb-PAPER-2022-048; CERN-EP-2023-121; LHCB-PAPER-2022-048.- Geneva : CERN, 2024-02-07 - 23 p. - Published in : JHEP 2402 (2024) 032 Fulltext: document - PDF; 2308.06162 - PDF; Related data file(s): ZIP;
7.
$\Lambda_c^+$ polarimetry using the dominant hadronic mode / LHCb Collaboration
The polarimeter vector field for multibody decays of a spin-half baryon is introduced as a generalisation of the baryon asymmetry parameters. Using a recent amplitude analysis of the $\Lambda_c^+ \to p K^- \pi^+$ decay performed at the LHCb experiment, we compute the distribution of the kinematic-dependent polarimeter vector for this process in the space of Mandelstam variables to express the polarised decay rate in a model-agnostic form. [...]
arXiv:2301.07010; LHCb-PAPER-2022-044; CERN-EP-2022-287.- Geneva : CERN, 2023-07-31 - 20 p. - Published in : JHEP 2307 (2023) 228 Fulltext: document - PDF; LHCb-PAPER-2022-044 - PDF; 2301.07010 - PDF; Related data file(s): ZIP;
8.
Observation of New Baryons in the <math display="inline"><msubsup><mi mathvariant="normal">Ξ</mi><mi>b</mi><mo>-</mo></msubsup><msup><mi>π</mi><mo>+</mo></msup><msup><mi>π</mi><mo>-</mo></msup></math> and <math display="inline"><mrow><msubsup><mrow><mi mathvariant="normal">Ξ</mi></mrow><mrow><mi>b</mi></mrow><mrow><mn>0</mn></mrow></msubsup><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>-</mo></mrow></msup></mrow></math> Systems / LHCb Collaboration
The first observation and study of two new baryonic structures in the final state $\Xi_b^0\pi^+\pi^-$ and the confirmation of the $\Xi_b(6100)^-$ state in the $\Xi_b^-\pi^+\pi^-$ decay mode are reported using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 $\mathrm{fb}^{-1}$. In addition, the properties of the known $\Xi_b^{*0}$, $\Xi_b^{'-}$ and $\Xi_b^{*-}$ resonances are measured with improved precision. [...]
arXiv:2307.13399; LHCb-PAPER-2023-008; CERN-EP-2023-126.- Geneva : CERN, 2023-10-23 - 11 p. - Published in : Phys. Rev. Lett. 131 (2023) 171901 Fulltext: Xibpipi_PAPER_2022 - PDF; 2307.13399 - PDF; Publication - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
9.
Search for $CP$ violation in the phase space of $D^0 \to \pi^-\pi^+\pi^0$ decays with the energy test / LHCb Collaboration
A search for $CP$ violation in $D^0 \to \pi^-\pi^+\pi^0$ decays is reported, using $pp$ collision data collected by the LHCb experiment from 2015 to 2018 corresponding to an integrated luminosity of 6$fb^{-1}$. An unbinned model-independent approach provides sensitivity to local $CP$ violation within the two-dimensional phase space of the decay. [...]
arXiv:2306.12746; CERN-EP-2023-103; LHCb-PAPER-2023-005.- Geneva : CERN, 2023-09-20 - 24 p. Fulltext: document - PDF; 2306.12746 - PDF; erratum - PDF; Related data file(s): ZIP;
10.
Measurement of CP asymmetries and branching fraction ratios of B$^{−}$ decays to two charm mesons / LHCb Collaboration
The $CP$ asymmetries of seven $B^-$ decays to two charm mesons are measured using data corresponding to an integrated luminosity of $9\text{fb}^{-1}$ of proton-proton collisions collected by the LHCb experiment. Decays involving a $D^{*0}$ or $D^{*-}_s$ meson are analysed by reconstructing only the $D^0$ or $D^-_s$ decay products. [...]
arXiv:2306.09945; LHCb-PAPER-2023-007; CERN-EP-2023-104.- Geneva : CERN, 2023-09-28 - 29 p. - Published in : JHEP 2309 (2023) 202 Fulltext: 2306.09945 - PDF; document - PDF; LHCb-PAPER-2023-007_arxiv1 - PDF; Related data file(s): ZIP; Supplementary information: ZIP; Supplementary material: PDF;

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