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CERN Document Server 找到 303 笔记录  1 - 10下一个最後  跳到记录: 检索需时 0.55 秒. 
1. Development of Sampling Modules for the Upgrade II of the LHCb ECAL
Reference: Poster-2024-1230
Created: 2021. -1 p
Creator(s): Martinazzoli, Loris

The LHCb experiment is a single-arm forward particle detector located at the Large Hadron Collider at CERN. After the Upgrade II, it will run at a luminosity of up to $1.5 \cdot 10^{34} cm^{−2}s^{−1}$ to collect 300 fb$^{-1}$ to collect 300 fb$^{-1}$ of data. A major revision of the LHCb Electromagnetic Calorimeter is required due to the increased particle densities and radiation doses. One option for the central part is a sampling spaghetti calorimeter (SPACAL) comprising radiation-hard crystal scintillators and a Tungsten absorber, whereas a SPACAL with plastic scintillators and Lead absorber is candidate for the outer region. A prototype was assembled with fibres of Cerium-doped YAG and GAGG. This contribution presents the development of the SPACAL prototypes, including scintillators and photodetectors studies, the test beam results, and Monte Carlo simulations identifying the materials requirements in a high-rate environment.

 		© CERN Geneva

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2.
Measurement of CP asymmetry in $B^0_s \to D^{\mp}_s K^{\pm}$ decays / LHCb Collaboration
A measurement of the CP-violating parameters in BsDsK decays is reported, based on the analysis of proton-proton collision data corresponding to an integrated luminosity of $6\,\mathrm{fb}^{-1}$ at a centre-of-mass energy of $13 \,\mathrm{TeV}$. [...]
arXiv:2412.14074 ; LHCb-PAPER-2024-020 ; CERN-EP-2024-219. - 34.
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3.
Measurement of $C\!P$ asymmetries in $\Lambda_b^0\to ph^-$ decays / LHCb Collaboration
A search for $CP$ violation in $\Lambda_b^0\rightarrow pK^-$ and $\Lambda_b^0\rightarrow p\pi^-$ decays is presented using the full Run 1 and Run 2 data samples of $pp$ collisions collected with the LHCb detector, corresponding to an integrated luminosity of 9 $\mathrm{fb}^{-1}$ at center-of-mass energies of 7, 8, and 13 TeV. [...]
arXiv:2412.13958 ; LHCb-PAPER-2024-048 ; CERN-EP-2024-330 ; LHCB-PAPER-2024-048. - 2024 - 24.
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4.
Test of lepton flavour universality with $B^+ \to K^+\pi^+\pi^-\ell^+\ell^-$ decays / LHCb Collaboration
The first test of lepton flavour universality between muons and electrons using $B^+ \to K^+\pi^+\pi^-\ell^+\ell^-$ ($\ell=e,\mu$) decays is presented. [...]
arXiv:2412.11645 ; LHCb-PAPER-2024-046 ; CERN-EP-2024-312 ; LHCB-PAPER-2024-046. - 2024 - 20.
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5.
Search for $D^0$ meson decays to $\pi^+ \pi^- e^+ e^-$ and $K^+ K^- e^+ e^-$ final states / LHCb Collaboration
A search for $D^0$ meson decays to the $\pi^+\pi^-e^+e^-$ and $K^+K^-e^+e^-$ final states is reported using a sample of proton-proton collisions collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb$^{-1}$. [...]
arXiv:2412.09414 ; LHCb-PAPER-2024-047 ; CERN-EP-2024-307 ; LHCB-PAPER-2024-047. - 2024 - 21.
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6.
Enhancing Energy Resolution and Particle Identification via Chromatic Calorimetry: A Concept Validation Study / Arora, Devanshi (CERN ; Shizuoka U., Hamamatsu) ; Salomoni, Matteo (CERN ; Milan Bicocca U.) ; Haddad, Yacine (Northeastern U.) ; Frank, Isabel (CERN ; Munich U.) ; Martinazzoli, Loris (CERN ; Milan Bicocca U.) ; Pizzichemi, Marco (CERN ; Milan Bicocca U.) ; Doser, Michael (CERN) ; Owari, Masaki (Shizuoka U., Hamamatsu) ; Auffray, Etiennette (CERN)
In particle physics, homogeneous calorimeters are used to measure the energy of particles as they interact with the detector material. [...]
arXiv:2411.03685. - 4.
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7.
Observation of the open-charm tetraquark state $T_{cs 0}^{*}(2870)^0$ in the $B^- \rightarrow D^- D^0 K_\mathrm{S}^0$ decay / LHCb Collaboration
An amplitude analysis of $B^-\rightarrow D^- D^0 K_\mathrm{S}^0$ decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 9 fb$^{-1}$, collected with the LHCb detector at center-of-mass energies of 7, 8, and 13$\mathrm{\,Te\kern -0.1em V}$. [...]
arXiv:2411.19781 ; LHCb-PAPER-2024-040 ; CERN-EP-2024-287 ; LHCB-PAPER-2024-040. - 2024 - 21.
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8.
Study of $\it{\Lambda}_{\it{b}}^\rm{0}$ and $\it{\Xi}_{\it{b}}^\rm{0}$ decays to $\it{\Lambda} h^+h^{'-}$ and evidence for $CP$ violation in $\it{\Lambda}_{\it{b}}^\rm{0}\to\it{\Lambda} K^+K^-$ decays / LHCb Collaboration
A study of Λ 0 b and Ξ0 b decays to Λh+h ′− (h (′) = π, K) is performed using pp collision data collected by the LHCb experiment during LHC Runs 1–2, corresponding to an integrated luminosity of 9 fb−1 . [...]
arXiv:2411.15441 ; LHCb-PAPER-2024-043 ; CERN-EP-2024-281. - 26.
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9.
Measurement of $\phi(1020)$ meson production in fixed-target $\textit{p}$Ne collisions at~$\sqrt{s_{NN}}$~=~68.5 GeV. / LHCb Collaboration
The first measurement of $\phi(1020)$ meson production in fixed-target $p$Ne collisions at $\sqrt{s_{NN}}=68.5$ GeV is presented. [...]
arXiv:2411.09343 ; LHCb-PAPER-2024-036 ; CERN-EP-2024-274 ; LHCB-PAPER-2024-036. - 2024 - 20.
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10.
First evidence for direct $CP$ violation in beauty to charmonium decays / LHCb Collaboration
The $CP$ asymmetry and branching fraction of the CKM-suppressed decay $B^+ \to J\psi \pi^+$ are precisely measured relative to the favoured decay $B^+ \to J\psi K^+$, using a sample of proton-proton collision data corresponding to an integrated luminosity of $5.4 \ \text{fb}^{-1}$ recorded at center-of-mass energy of $13\ \text{TeV}$ during 2016-2018. [...]
arXiv:2411.12178 ; LHCb-PAPER-2024-031 CERN-EP-2024-286 ; LHCb-PAPER-2024-031 ; CERN-EP-2024-286 ; LHCB-PAPER-2024-031. - 2024 - 20.
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