2024-02-23 10:18 |
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;
|
Rekord szczegółowy - Podobne rekordy
|
2024-02-02 10:39 |
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;
|
Rekord szczegółowy - Podobne rekordy
|
2023-11-29 14:11 |
Rekord szczegółowy - Podobne rekordy
|
2023-11-17 16:37 |
Rekord szczegółowy - Podobne rekordy
|
2023-11-03 15:43 |
Rekord szczegółowy - Podobne rekordy
|
2023-10-26 15:02 |
Rekord szczegółowy - Podobne rekordy
|
2023-10-26 13:49 |
Rekord szczegółowy - Podobne rekordy
|
2023-10-23 09:43 |
Observation of $\Xi_b^0 \rightarrow \Xi_c^+ D_s^-$ and $\Xi_b^- \rightarrow \Xi_c^0 D_s^-$ decaysObservation of $\Xi_b^0 \rightarrow \Xi_c^+ D_s^-$ and $\Xi_b^- \rightarrow \Xi_c^0 D_s^-$ decays
/ LHCb Collaboration
The $\Xi_b^0 \rightarrow \Xi_c^+ D_s^-$ and $\Xi_b^- \rightarrow \Xi_c^0 D_s^-$ decays are observed for the first time using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of $\sqrt{s}=13\mathrm{TeV}$, corresponding to an integrated luminosity of $5.1\mathrm{fb}^{-1}$. The relative branching fractions times the beauty-baryon production cross-sections are measured to be $\begin{align*} \mathcal{R}\left(\frac{\Xi_b^0}{\Lambda_b^0}\right) &\equiv \frac{\sigma\left(\Xi_b^0\right)}{\sigma\left(\Lambda_b^0\right)} \times \frac{\mathcal{B}\left(\Xi_b^0 \rightarrow \Xi_c^+ D_s^-\right)}{\mathcal{B}\left(\Lambda_b^0 \rightarrow \Lambda_c^0 D_s^-\right)} =(15.8\pm1.1\pm0.6\pm7.7)\%,\\ \mathcal{R}\left(\frac{\Xi_b^-}{\Lambda_b^0}\right) &\equiv \frac{\sigma\left(\Xi_b^-\right)}{\sigma\left(\Lambda_b^0\right)} \times \frac{\mathcal{B}\left(\Xi_b^- \rightarrow \Xi_c^0 D_s^-\right)}{\mathcal{B}\left(\Lambda_b^0 \rightarrow \Lambda_c^0 D_s^-\right)} =(16.9\pm1.3\pm0.9\pm4.3)\%, \end{align*}$ where the first uncertainties are statistical, the second systematic, and the third due to the uncertainties on the branching fractions of relevant charm-baryon decays. [...]
arXiv:2310.13546; CERN-EP-2023-173; LHCb-PAPER-2023-017.-
Geneva : CERN, 2024-03-07 - 17 p.
- Published in : Eur. Phys. J. C 84 (2024) 237
Fulltext: LHCb-PAPER-2023-017 - PDF; 2310.13546 - PDF; Publication - PDF; Related data file(s): ZIP;
|
Rekord szczegółowy - Podobne rekordy
|
2023-09-19 11:45 |
Measurement of CP violation in $B^0\to \psi(\to\ell^+\ell^-)K^0_\mathrm{S}(\to \pi^+\pi^-)$ decays
/ LHCb Collaboration
<--!html> A measurement of time-dependent $C\!P$ violation in the decays of $B^0$ and $\overline{B}^0$ mesons to the final states ${J\!/\!\psi(\to\mu^+\mu^-)K^0_\mathrm{S}}$, $\psi(2S)(\to\mu^+\mu^-)K^0_\mathrm{S}$ and $J\!/\!\psi(\to e^+e^-)K^0_\mathrm{S}$ with ${K^0_\mathrm{S}}\to{\pi^+\pi^-}$ is presented. The data correspond to an integrated luminosity of $6\,\mathrm{fb}^{-1}$ collected at a centre-of-mass energy of $\sqrt{s}=13\,\mathrm{TeV}$ with the LHCb detector. [...]
arXiv:2309.09728; LHCb-PAPER-2023-013; CERN-EP-2023-177.-
Geneva : CERN, 2024-01-08 - 12 p.
- Published in : Phys. Rev. Lett. 132 (2024) 021801
Fulltext: 2309.09728 - PDF; Publication - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
|
Rekord szczegółowy - Podobne rekordy
|
2023-08-17 10:01 |
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;
|
Rekord szczegółowy - Podobne rekordy
|