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EP Preprints

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2023-11-29
14:16
Measurement of associated $J/\psi$-$\psi(2S)$ production cross-section in $pp$ collisions at $\sqrt{s}=13$ TeV / LHCb Collaboration
The cross-section of associated $J/\psi$-$\psi(2S)$ production in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=13$ TeV is measured using a data sample corresponding to an integrated luminosity of 4.2 fb$^{-1}$, collected by the LHCb experiment. [...]
arXiv:2311.15921 ; LHCb-PAPER-2023-023 ; CERN-EP-2023-243 ; LHCB-PAPER-2023-023. - 2023. - 28 p.
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2023-11-29
14:11
Measurement of $J/\psi$-pair production in $pp$ collisions at $\sqrt{s}=13$ TeV and study of gluon transverse-momentum dependent PDFs / LHCb Collaboration
The production cross-section of $J/\psi$ pairs in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=13$ TeV is measured using a data sample corresponding to an integrated luminosity of 4.2 fb$^{-1}$ collected by the LHCb experiment. [...]
arXiv:2311.14085 ; LHCb-PAPER-2023-022 ; CERN-EP-2023-242 ; LHCB-PAPER-2023-022. - 2023. - 38 p, 38 p.
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2023-11-24
09:55
Observation of $\Lambda_b^0 \to \Lambda_c^+ \bar{D}^{(*)0} K^-$ and $\Lambda_b^0 \to \Lambda_c^+ D_s^{*-}$ decays / LHCb Collaboration
The decays $\Lambda_b^0 \to \Lambda_c^+\bar{D}^{(*)0}K^-$ and $\Lambda_b^0 \to \Lambda_c^+ D_s^{*-}$ are observed for the first time, in proton-proton collision data at $\sqrt{s}=13$TeV corresponding to an integrated luminosity of 5.4 fb${}^{-1}$ collected with the LHCb detector. [...]
arXiv:2311.14088 ; CERN-EP-2023-244 ; LHCb-PAPER-2023-034. - 2023.
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2023-11-20
15:45
Measurement of forward charged hadron flow harmonics in peripheral PbPb collisions at $\sqrt{s_{NN}}= 5.02$ TeV with the LHCb detector / LHCb Collaboration
Flow harmonic coefficients, $v_n$, which are the key to studying the hydrodynamics of the quark-gluon plasma (QGP) created in heavy-ion collisions, have been measured in various collision systems, kinematic regions, and using various particle species. [...]
arXiv:2311.09985 ; LHCb-PAPER-2023-031 ; CERN-EP-2023-240 ; LHCB-PAPER-2023-031. - 2023. - 23 p.
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2023-11-20
10:39
Measurement of the $D^*$ longitudinal polarization in $B^0 \to D^{* -}\tau^+\nu_{\tau}$ decays   / LHCb Collaboration
The longitudinal polarization fraction of the $D^*$ meson is measured in $B^0 \to D^{* -}\tau^+\nu_{\tau}$ decays, where the $\tau$ lepton decays to three charged pions and a neutrino, using proton-proton collision data collected by the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV and corresponding to an integrated luminosity of 5 fb$^{-1}$. [...]
arXiv:2311.05224 ; LHCb-PAPER-2023-020 ; CERN-EP-2023-225. - 2023.
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2023-11-17
16:37
A model-independent measurement of the CKM angle $\gamma$ in partially reconstructed $B^{\pm} \to D^{*} h^{\pm}$ decays with $D \to K_{S}^{0} h^{+}h^{-}$ $(h=\pi, K)$ / LHCb Collaboration
A measurement of $C\!P$-violating observables in $B^{\pm} \to D^{*} K^{\pm}$ and $B^{\pm} \to D^{*} \pi^{\pm}$ decays is made where the photon or neutral pion from the $D^{*} \to D\gamma$ or $D^{*} \to D\pi^{0}$ decay is not reconstructed. [...]
arXiv:2311.10434 ; LHCb-PAPER-2023-029 ; CERN-EP-2023-241. - 2023. - 31 p.
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2023-11-15
11:56
Observation of strangeness enhancement with charmed mesons in high-multiplicity $p\mathrm{Pb}$ collisions at $\sqrt {s_{\mathrm{NN}}}=8.16\,$TeV / LHCb Collaboration
The production of prompt $D^+_{s}$ and $D^+$ mesons is measured by the LHCb experiment in proton-lead ($p\mathrm{Pb}$) collisions in both the forward ($1.5 < y^*<4.0$) and backward ($-5.0 < y ^*<-2.5$) rapidity regions at a nucleon-nucleon center-of-mass energy of $\sqrt {s_{\mathrm{NN}}}=8.16\,$TeV [...]
arXiv:2311.08490 ; LHCb-PAPER-2023-021 ; CERN-EP-2023-236. - 2023. - 44 p.
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2023-11-03
15:43
Fraction of $\chi_c$ decays in prompt $J/\psi$ production measured in $pPb$ collisions at $\sqrt{s_{NN}}=8.16 \text{TeV}$ / LHCb Collaboration
The fraction of $\chi_{c1}$ and $\chi_{c2}$ decays in the prompt $J/\psi$ yield, $F_{\chi c}=\sigma_{\chi c\to J/\psi}/\sigma_{J/\psi}$, is measured by the LHCb detector in $p$Pb collisions at $\sqrt{s_{NN}}=8.16$ TeV. [...]
arXiv:2311.01562 ; LHCb-PAPER-2023-028 ; CERN-EP-2023-224. - 2023. - 20 p.
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2023-10-31
15:28
Search for $\textit{CP}$ violation in the phase space of $D^{0} \rightarrow K_{S}^{0} K^{\pm} \pi^{\mp} $ decays with the energy test / LHCb Collaboration
A search for CP violation in $D^{0} \rightarrow K_{S}^{0} K^{+} \pi^{-} $ and $D^{0} \rightarrow K_{S}^{0} K^{-} \pi^{+} $ decays is reported. [...]
arXiv:2310.19397 ; LHCb-PAPER-2023-019 ; CERN-EP-2023-231. - 2023. - 21 p.
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2023-10-26
15:02
Studies of $\eta$ and $\eta'$ production in $pp$ and $p$Pb collisions / LHCb Collaboration
The production of $\eta$ and $\eta'$ mesons is studied in proton-proton and proton-lead collisions collected with the LHCb detector. [...]
arXiv:2310.17326 ; LHCb-PAPER-2023-030 ; CERN-EP-2023-228. - 2023. - 34 p.
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