2025-12-01
14:31 |
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2025-11-05
18:40 |
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2025-09-22
16:01 |
First evidence of CP violation in beauty baryon to charmonium decays
/ LHCb Collaboration
A study of the difference in the $CP$ asymmetries between ${\Lambda}^0_b \rightarrow J / \psi p \pi^-$ and ${\Lambda}^0_b \rightarrow J / \psi p K^-$ decays, $\Delta {\cal A}_{CP}$, is performed using proton-proton collision data collected by the LHCb experiment in the years 2015-2018, corresponding to an integrated luminosity of $6\,{\rm fb}^{-1}$. This quantity is measured to be $ \Delta {\cal A}_{CP}=(4.03\pm 1.18\pm 0.23)\%$, where the first uncertainty is statistical and the second is systematic. [...]
arXiv:2509.16103; LHCb-PAPER-2025-021; CERN-EP-2025-184; LHCB-PAPER-2025-021.-
Geneva : CERN, 2025-12-29 - 11 p.
- Published in : Sci. Bull. 71 (2026) 547-557
Fulltext: LHCb-PAPER-2025-021-figures - ZIP; 2509.16103 - PDF; Published version - PDF; External link: Preprint
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2025-09-19
10:37 |
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2025-09-16
16:26 |
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2025-08-29
09:01 |
Inclusive $B$-meson flavour-tagging algorithm at LHCb
/ LHCb Collaboration
A new algorithm is developed to identify the flavour of neutral $B$ mesons at production in $pp$ collisions by utilising all tracks from the hadronisation process. The algorithm is calibrated separately for $B^0$ and $B^{0}_{s}$ mesons using $B^{0}\to J/\psi K^{+}\pi^-$ and $B^{0}_{s}\to D_{s}^{-}\pi^+$ decays from $pp$ collision data collected by the LHCb experiment at a centre-of-mass energy of 13\,TeV. [...]
arXiv:2508.20180; LHCB-PAPER-2025-024; CERN-EP-2025-168; LHCB-PAPER-2025-024.-
Geneva : CERN, 2025-11-10 - 32 p.
Fulltext: IFTRun2Paper - PDF; 2508.20180 - PDF; document - PDF; Related data file(s): ZIP;
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2025-08-26
13:37 |
Measurement of branching fractions and $C\!P$ asymmetries in $\mathit{\Lambda}_b^0(\mathit{\Xi}_b^0)\!\to pK_{\mathrm S}^0h^-$ decays
/ LHCb Collaboration
A study of $\mathit{\Lambda}_b^0$ and $\mathit{\Xi}_b^0$ baryon decays to the final states $pK_{\mathrm S}^0\pi^-$ and $pK_{\mathrm S}^0K^-$ is performed using $pp$ collision data collected by the LHCb experiment, corresponding to an integrated luminosity of $9\,\mathrm{fb}^{-1}$. The decays $\mathit{\Lambda}_b^0\!\to pK_{\mathrm S}^0K^-$ and $\mathit{\Xi}_b^0\!\to pK_{\mathrm S}^0K^-$ are observed for the first time, with significances reaching eight standard deviations. [...]
arXiv:2508.17836; LHCb-PAPER-2025-016; CERN-EP-2025-158; LHCB-PAPER-2025-016.-
Geneva : CERN, 2025-10-21 - 27 p.
- Published in : JHEP 2510 (2025) 169
Fulltext: 2508.17836v1 - PDF; 2508.17836 - PDF; document - PDF; Related data file(s): ZIP; External link: Fulltext
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2025-08-25
09:55 |
First observation of the charmless baryonic decay $B^+\to \bar{\Lambda}p\bar{p}p$
/ LHCb Collaboration
A search for the charmless baryonic decay $B^+\to \bar{\Lambda} p\bar{p}p$ is performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 5.4 $\rm{fb}^{-1}$. The branching fraction for this decay is measured for the first time relative to that of the topologically similar decay $B^+\to J/\psi K^+$, with $J/\psi \to \bar{\Lambda} p K^-$. [...]
arXiv:2508.16259; LHCb-PAPER-2025-032; CERN-EP-2025-174; LHCB-PAPER-2025-032.-
Geneva : CERN, 2025-12-22 - 21 p.
- Published in : Phys. Rev. Lett. 135 (2025) 261901
Fulltext: LHCb-PAPER-2025-032 - PDF; 2508.16259 - PDF; document - PDF; Related data file(s): ZIP;
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2025-08-20
09:20 |
First observation of $C\!P$ violation and measurement of polarisation in $B^+ \to \rho(770)^0 K^*(892)^+$ decays
/ LHCb Collaboration
An amplitude analysis of the $B^+\to(\pi^+\pi^-)(K^0_{\mathrm{S}}\pi^+)$ decay is performed in the mass regions $0.30 < m_{\pi^+\pi^-} < 1.10\,\mathrm{GeV}/c^2$ and $0.75 < m_{K^0_{\mathrm{S}}\pi^+} < 1.20\,\mathrm{GeV}/c^2$, using $pp$ collision data recorded with the LHCb detector corresponding to an integrated luminosity of $9\,\mathrm{fb}^{-1}$. The polarization fractions and $CP$ asymmetries for $B^+\to\rho(770)^0K^*(892)^+$ decays are measured. [...]
arXiv:2508.13563; LHCb-PAPER-2025-026; CERN-EP-2025-171; LHCB-PAPER-2025-026.-
Geneva : CERN, 2026-01-14 - 27 p.
- Published in : Phys. Rev. Lett. 136 (2026) 021803
Fulltext: LHCb_PAPER_2025_026_arXiv - PDF; 2508.13563 - PDF; document - PDF; Related data file(s): ZIP; Supplementary materials: ZIP;
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2025-08-04
15:07 |
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