2024-10-04
10:45 |
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 - 26 p.
- Published in : JHEP 2412 (2024) 026
Fulltext: LHCb-PAPER-2024-028 - PDF; 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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2024-09-20
11:34 |
Analysis of $\it{\Lambda}^\mathrm{0}_b \rightarrow pK^-\mu^+\mu^-$ decays
/ LHCb Collaboration
The differential branching fraction and angular coefficients of ${\it{\Lambda}^\mathrm{0}_b \rightarrow pK^-\mu^+\mu^-}$ decays are measured in bins of the dimuon mass squared and dihadron mass. The analysis is performed using a data set corresponding to 9$fb^-1$ of integrated luminosity collected with the $\mbox{LHCb}$ detector between 2011 and 2018. [...]
arXiv:2409.12629; CERN-EP-2024-212; LHCb-PAPER-2024-024.-
Geneva : CERN, 2024-12-19 - 33 p.
- Published in : JHEP 2412 (2024) 147
Fulltext: 2409.12629 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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2024-09-06
14:06 |
Measurement of $CP$ violation in $B^0 \to D^+D^-$ and $B_s^0 \to D_s^+D_s^-$ decays
/ LHCb Collaboration
A time-dependent, flavour-tagged measurement of $CP$ violation is performed with ${B^0}\rightarrow{D^{+}D^{-}}$ and ${B^{0}_{s}}\rightarrow{D^{+}_{s}D^{-}_{s}}$ decays, using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 6 fb$^{-1}$. In ${B^0}\rightarrow{D^{+}D^{-}}$ decays the $CP$-violation parameters are measured to be \begin{align} S_{D^{+}D^{-}} & = -0.552 \pm 0.100\text{(stat)} \pm 0.010\text{(syst)}, \nonumber \newline C_{D^{+}D^{-}} & = \phantom{-}0.128 \pm0.103\text{(stat)} \pm 0.010\text{(syst)}. [...]
arXiv:2409.03009; LHCb-PAPER-2024-027; CERN-EP-2024-217; LHCB-PAPER-2024-027.-
Geneva : CERN, 2025-01-09 - 26 p.
- Published in : JHEP 2501 (2025) 061
Fulltext: LHCb-PAPER-2024-027 - PDF; 2409.03009 - PDF; document - PDF; Related data file(s): ZIP;
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2024-09-06
12:25 |
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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2024-09-06
09:49 |
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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2024-08-30
08:53 |
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 - 25 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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2024-08-12
13:51 |
Observation of muonic Dalitz decays of $\chi_{b}$ mesons and precise spectroscopy of hidden-beauty states
/ LHCb Collaboration
The decays of the $\chi_{b1}(1P)$, $\chi_{b2}(1P)$, $\chi_{b1}(2P)$ and $\chi_{b2}(2P)$ mesons into the $\Upsilon(1S)\mu^+\mu^-$ final state are observed with a high significance using proton-proton collision data collected with the LHCb detector and corresponding to an integrated luminosity of 9fb$^{-1}$. The newly observed decays together with the $\Upsilon(2S)\rightarrow \Upsilon(1S)\pi^+\pi^-$ and $\Upsilon(3S)\rightarrow \Upsilon(2S)\pi^+\pi^-$ decay modes are used for precision measurements of the mass and mass splittings for the hidden-beauty states..
arXiv:2408.05134; LHCb-PAPER-2024-025; CERN-EP-2024-207.-
Geneva : CERN, 2024-10-16 - 29 p.
- Published in : JHEP 2410 (2024) 122
Fulltext: LHCb-PAPER-2024-025 - PDF; 2408.05134 - PDF; Publication - PDF; Related data file(s): ZIP;
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2024-07-26
15:46 |
Αναλυτική εγγραφή - Παρόμοιες εγγραφές
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2024-07-22
14:26 |
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 - 19 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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2024-07-19
16:36 |
Αναλυτική εγγραφή - Παρόμοιες εγγραφές
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