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The LHCb VELO Upgrade II: design and development of the readout electronics / Fernández Prieto, A (Santiago de Compostela U., IGFAE) /LHCb VELO Collaboration
The LHCb collaboration proposes a Phase-II Upgrade of the detector, to be installed duringthe LHC Long Shutdown 4 (2032–2034). Operating in the HL-LHC environment poses significantchallenges to the design of the upgraded detector, and in particular to its tracking system. [...]
2024 - 7 p. - Published in : JINST

In : Topical Workshop on Electronics for Particle Physics 2023 (TWEPP 2023), Geremeas, Sardinia, Italy, 1 - 6 Oct 2023, pp.C05011

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The LHCb VELO Upgrade module construction / Akiba, K. (NIKHEF, Amsterdam) ; Alexander, M. (Glasgow U.) ; Bertella, C. (Manchester U.) ; Biolchini, A. (NIKHEF, Amsterdam) ; Bitadze, A. (Manchester U.) ; Bogdanova, G. (Higher Sch. of Economics, Moscow) ; Borghi, S. (Manchester U.) ; Bowcock, T.J.V. (Liverpool U.) ; Bridges, K. (Liverpool U.) ; Brock, M. (Oxford U.) et al.
The LHCb detector has undergone a major upgrade for LHC Run 3. This Upgrade I detector facilitates operation at higher luminosity and utilises full-detector information at the LHC collision rate, critically including the use of vertex information. [...]
arXiv:2404.13615; LHCb-DP-2024-001; LHCb-PAPER-2024-001.- 2024-06-17 - 66 p. - Published in : JINST 19 (2024) P06023 Fulltext: 2404.13615 - PDF; Publication - PDF;

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The LHCb upgrade I / LHCb Collaboration
The LHCb upgrade represents a major change of the experiment. The detectors have been almost completely renewed to allow running at an instantaneous luminosity five times larger than that of the previous running periods. [...]
arXiv:2305.10515; LHCb-DP-2022-002.- 2024-05-23 - 232 p. - Published in : JINST 19 (2024) P05065 Fulltext: 2305.10515 - PDF; document - PDF;
In : The Large Hadron Collider and The Experiments for Run 3

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Direct $CP$ violation in charmless three-body decays of $B^{\pm}$ mesons / LHCb Collaboration
Measurements of $CP$ asymmetries in charmless three-body decays of $B^\pm$ mesons are reported using proton-proton collision data collected by the LHCb detector, corresponding to an integrated luminosity of 5.9$\,$fb$^{-1}$. The previously observed $CP$ asymmetry in $B^\pm \to \pi^\pm K^+ K^-$ decays is confirmed, and $CP$ asymmetries are observed with a significance of more than five standard deviations in the $B^\pm \to \pi^\pm \pi^+ \pi^-$ and $B^\pm \to K^\pm K^+ K^-$ decays, while the $CP$ asymmetry of $B^\pm \to K^\pm \pi^+ \pi^-$ decays is confirmed to be compatible with zero. [...]
arXiv:2206.07622; LHCb-PAPER-2021-049; CERN-EP-2022-100.- Geneva : CERN, 2023-07-01 - 17 p. - Published in : Phys. Rev. D 108 (2023) 012008 Fulltext: 2206.07622 - PDF; LHCb-PAPER-2021-049 - PDF; Publication - PDF; LHCb-PAPER-2021-049-supplementary - ZIP; Related data file(s): ZIP;

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Search for direct $CP$ violation in charged charmless $B \to PV$ decays / LHCb Collaboration
Measurements of $CP$ asymmetry in charmless $B\to PV$ decays are presented, where $P$ and $V$ denote a pseudoscalar and a vector meson, respectively. Five different $B\to PV$ decays from four final states, $B^\pm \to \pi^\pm \pi^+ \pi^-$, $B^\pm \to K^\pm \pi^+ \pi^-$, $B^\pm \to K^\pm K^+ K^-$ and $B^\pm \to \pi^\pm K^+ K^-$ are analised. [...]
arXiv:2206.02038; LHCb-PAPER-2021-050; CERN-EP-2022-101.- Geneva : CERN, 2023-07-01 - 13 p. - Published in : Phys. Rev. D 108 (2023) 012013 Fulltext: 2206.02038 - PDF; LHCb-PAPER-2021-050 - PDF; Publication - PDF; Related data file(s): ZIP;

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Measurement of CP asymmetries in $ {D}_{(s)}^{+}\to \eta {\pi}^{+} $ and $ {D}_{(s)}^{+}\to {\eta}^{\prime }{\pi}^{+} $ decays / LHCb Collaboration
Searches for $CP$ violation in the decays $D^+_{(s)}\rightarrow \eta \pi^+$ and $D^+_{(s)}\rightarrow \eta^{\prime} \pi^+$ are performed using $pp$ collision data corresponding to 6 fb$^{-1}$ of integrated luminosity collected by the LHCb experiment. The calibration channels $D^+_{(s)}\rightarrow \phi \pi^+$ are used to remove production and detection asymmetries. [...]
arXiv:2204.12228; CERN-EP-2022-035; LHCb-PAPER-2021-051.- 2023-04-18 - 16 p. - Published in : JHEP 04 (2023) 081 Fulltext: 2204.12228 - PDF; document - PDF; Related data file(s): ZIP;

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Observation of sizeable $\omega$ contribution to $\chi_{c1}(3872) \to \pi^+\pi^- J/\psi$ decays / LHCb Collaboration
Resonant structures in the dipion mass spectrum from $\chi_{c1}(3872)\to\pi^+\pi^- J/\psi$ decays, produced via $B^+\to K^+\chi_{c1}(3872)$ decays, are analyzed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb$^{-1}$. A sizeable contribution from the isospin conserving $\chi_{c1}(3872)\to\omega J/\psi$ decay is established for the first time, $(21.4\pm2.3\pm2.0)\%$, with a significance of more than $7.1\sigma$. [...]
arXiv:2204.12597; LHCb-PAPER-2021-045; CERN-EP-2022-049.- Geneva : CERN, 2023-07-01 - 12 p. - Published in : Phys. Rev. D 108 (2023) L011103 Fulltext: LHCb-PAPER-2021-045 - PDF; 2204.12597 - PDF; Publication - PDF; Related data file(s): ZIP;

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Nuclear modification factor of neutral pions in the forward and backward regions in $p$Pb collisions / LHCb Collaboration
The nuclear modification factor of neutral pions is measured in proton-lead collisions collected at a center-of-mass energy per nucleon of $8.16$ TeV with the LHCb detector. The $\pi^0$ production cross section is measured differentially in transverse momentum ($p_{T}$) for $1.5< p_{T} <10.0$ GeV and in center-of-mass pseudorapidity ($\eta_{CM}$) regions $2.5<\eta_{CM}<3.5$ (forward) and $-4.0<\eta_{CM}<-3.0$ (backward) defined relative to the proton beam direction. [...]
arXiv:2204.10608; LHCb-PAPER-2021-053; CERN-EP-2022-050.- Geneva : CERN, 2023-07-24 - 14 p. - Published in : Phys. Rev. Lett. 131 (2023) 042302 Fulltext: LHCb-PAPER-2021-053 - PDF; 2204.10608 - PDF; Publication - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Measurement of the charm mixing parameter $y_{CP} - y_{CP}^{K\pi}$ using two-body $D^0$ meson decays / LHCb Collaboration
A measurement of the ratios of the effective decay widths of $D^0 \to \pi^-\pi^+$ and $D^0 \to K^-K^+$ decays over that of $D^0 \to K^-\pi^+$ decays is performed with the LHCb experiment using proton-proton collisions at a centre-of-mass energy of $13\,\mathrm{TeV}$, corresponding to an integrated luminosity of $6\,\mathrm{fb^{-1}}$. These observables give access to the charm mixing parameters $y_{CP}^{\pi\pi} - y_{CP}^{K\pi}$ and $y_{CP}^{KK} - y_{CP}^{K\pi}$, and are measured as $y_{CP}^{\pi\pi} - y_{CP}^{K\pi} = (6.57 \pm 0.53 \pm 0.16) \times 10^{-3}$, $y_{CP}^{KK} - y_{CP}^{K\pi} = (7.08 \pm 0.30 \pm 0.14) \times 10^{-3}$, where the first uncertainties are statistical and the second systematic. [...]
arXiv:2202.09106; LHCb-PAPER-2021-041; CERN-EP-2022-022; LHCB-PAPER-2021-041.- 2022-05-01 - 27 p. - Published in : Phys. Rev. D 105 (2022) 092013 Fulltext: LHCb-PAPER-2021-041 - PDF; 2202.09106 - PDF; PhysRevD.105.092013 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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10.

Observation of the doubly charmed baryon decay $ {\varXi}_{cc}^{++}\to {\varXi}_c^{\prime +}{\pi}^{+} $ / LHCb Collaboration
The $\it{\Xi_{cc}^{++}\to \Xi_{c}^{'+}\pi^{+}}$ decay is observed using proton-proton collisions collected by the LHCb experiment at a centre-of-mass energy of $13\mathrm{\,Te\kern -0.1em V}$, corresponding to an integrated luminosity of $5.4\,\mathrm{fb}^{-1}$. The $\it{\Xi_{cc}^{++}\to \Xi_{c}^{'+}\pi^{+}}$ decay is reconstructed partially, where the photon from the $\it{\Xi_{c}^{'+} \to \Xi_{c}^{+}\gamma}$ decay is not reconstructed and the $pK^-\pi^+$ final state of the $\it{\Xi_{c}^{+}}$ baryon is employed. [...]
arXiv:2202.05648; LHCb-PAPER-2021-052; CERN-EP-2022-016.- 2022-05-06 - 19 p. - Published in : JHEP 2205 (2022) 038 Fulltext: LHCb-PAPER-2021-052_to_arXiv_ - PDF; 2202.05648 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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