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Najnovije dodano:
2024-10-04
10:45
Measurement of the effective leptonic weak mixing angle
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.
[...]
CERN-EP-2024-230
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LHCB-PAPER-2024-028
.
- 2024
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2024-09-27
11:23
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
[...]
arXiv:2409.17209
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CERN-EP-2024-220
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LHCb-PAPER-2024-026
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LHCB-PAPER-2024-026
.
- 2024. - 23 p, 23 p.
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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.
[...]
arXiv:2409.12629
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CERN-EP-2024-212
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LHCb-PAPER-2024-024
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- 2024. - 33 p.
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2024-09-09
14:28
First determination of the spin-parity of ${\Xi}_{c}(3055)^{+0}$ 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.
[...]
arXiv:2409.05440
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LHCb-PAPER-2024-018
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CERN-EP-2024-215
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LHCB-PAPER-2024-018
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- 2024. - 24 p.
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2024-09-09
10:21
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.
[...]
arXiv:2409.03496
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LHCb-PAPER-2024-012
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CERN-EP-2024-213
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LHCB-PAPER-2024-012
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- 2024. - 36 p.
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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$^{-1}$.
[...]
arXiv:2409.03009
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LHCb-PAPER-2024-027
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CERN-EP-2024-217
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LHCB-PAPER-2024-027
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- 2024. - 26 p.
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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 $\mathrm{Te\kern -0.1em V}$.
[...]
arXiv:2409.02759
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LHCb-PAPER-2024-017
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CERN-EP-2024-200
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- 2024. - 34 p.
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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.
[...]
arXiv:2409.01414
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CERN-EP-2024-204
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LHCb-PAPER-2024-019
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- 2024. - 21 p.
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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 $5.4\,\text{fb}^{-1}$.
[...]
arXiv:2408.16646
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LHCb-PAPER-2024-016
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CERN-EP-2024-201
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LHCB-PAPER-2024-016
.
- 2024. - 26 p.
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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$^{-1}$.
[...]
arXiv:2408.05134
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LHCb-PAPER-2024-025
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CERN-EP-2024-207
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LHCB-PAPER-2024-025
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- 2024. - 29 p.
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