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EP Preprints

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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 ; LHCb-PAPER-2024-027 ; CERN-EP-2024-217 ; LHCB-PAPER-2024-027. - 2024. - 26 p, 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 ; LHCb-PAPER-2024-017 ; CERN-EP-2024-200. - 2024. - 34 p, 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 ; CERN-EP-2024-204 ; LHCb-PAPER-2024-019. - 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 ; LHCb-PAPER-2024-016 ; CERN-EP-2024-201 ; 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 ; LHCb-PAPER-2024-025 ; CERN-EP-2024-207 ; LHCB-PAPER-2024-025. - 2024. - 29 p.
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2024-08-12
11:33
Status and perspectives of the neutron time-of-flight facility n_TOF at CERN / Chiaveri, Enrico (CERN) /n_TOF Collaboration
Since the start of its operation in 2001, based on an idea of Prof. Carlo Rubbia, the neutron time-of-flight facility of CERN, n_TOF, has become one of the most forefront neutron facilities in the world for neutron cross section measurements. [...]
Geneva : CERN, 2019 - 11 p. Fulltext: PDF;

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2024-07-26
15:46
Measurement of $D^0 -\overline{D}^0$ mixing parameters and search for $CP$ violation using $D^0\rightarrow K^+\pi^-$ decays / LHCb Collaboration
A measurement of the time-dependent ratio of the $D^0\rightarrow K^+\pi^-$ to $\overline{D}^0\rightarrow K^+\pi^-$ decay rates is reported. [...]
arXiv:2407.18001 ; LHCb-PAPER-2024-008 ; CERN-EP-2024-178 ; LHCB-PAPER-2024-008. - 2024. - 43 p.
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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. [...]
arXiv:2407.14261 ; LHCb-PAPER-2024-004 ; CERN-EP-2024-165 ; LHCB-PAPER-2024-004. - 2024. - 32 p.
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2024-07-22
10:45
Observation of exotic ${J\mskip -3mu/\mskip -2mu\psi}\phi$ resonances in diffractive processes in proton-proton collisions / LHCb Collaboration
The first study of $J\mskip -3mu/\mskip -2mu\psi\phi$ production in diffractive processes in proton-proton collisions is presented. [...]
arXiv:2407.14301 ; LHCb-PAPER-2023-043 ; CERN-EP-2024-149 ; LHCB-PAPER-2023-043. - 2024. - 21 p.
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2024-07-19
16:36
Search for the rare $\Lambda_c^+ \to p \mu^+\mu^-$ decay / LHCb Collaboration
A search for the nonresonant $\Lambda_c^+ \to p \mu^+ \mu^-$ decay is performed using proton-proton collision data recorded at a centre-of-mass energy of 13 TeV by the LHCb experiment, corresponding to an integrated luminosity of 5.4 fb$^{-1}$. [...]
arXiv:2407.11474 ; LHCb-PAPER-2024-005 ; CERN-EP-2024-158 ; LHCB-PAPER-2024-005. - 2024. - 22 p.
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