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CEPC Technical Design Report: Accelerator / CEPC Study Group Collaboration
The Circular Electron Positron Collider (CEPC) is a large scientific project initiated and hosted by China, fostered through extensive collaboration with international partners. The complex comprises four accelerators: a 30 GeV Linac, a 1.1 GeV Damping Ring, a Booster capable of achieving energies up to 180 GeV, and a Collider operating at varying energy modes (Z, W, H, and ttbar). [...]
arXiv:2312.14363; IHEP-CEPC-DR-2023-01; IHEP-AC-2023-01.- 2024-06-03 - 1106 p. - Published in : Radiat. Detect. Technol. Methods 8 (2024) 1-1105 Fulltext: 2312.14363 - PDF; Publication - PDF;

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Open charm production and asymmetry in $p$Ne collisions at $\sqrt{s_{\scriptscriptstyle\rm NN}} =$ 68.5 GeV / LHCb Collaboration
A measurement of $D^0$ meson production by the LHCb experiment in its fixed-target configuration is presented. The production of $D^0$ mesons is studied with a beam of 2.5 TeV protons colliding on a gaseous neon target at rest, corresponding to a nucleon-nucleon centre-of-mass energy of $\sqrt{s_{\rm NN}}$ = 68.5 GeV [...]
arXiv:2211.11633; CERN-EP-2022-217; LHCb-PAPER-2022-015; LHCB-PAPER-2022-015.- Geneva : CERN, 2023-06-27 - 11 p. - Published in : Eur. Phys. J. C
Fulltext: document - PDF; 2211.11633 - PDF; Related data file(s): ZIP;

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First observation of the $B^+ \rightarrow D_s^+ D_s^- K^+$ decay / LHCb Collaboration
The $B^+ \rightarrow D_s^+ D_s^- K^+$ decay is observed for the first time using proton-proton collision data collected by the LHCb detector at centre-of-mass energies of $7$, $8$ and $13\, \text{TeV}$, corresponding to an integrated luminosity of $9\,\text{fb}^{-1}$. Its branching fraction relative to that of the $B^{+} \rightarrow D^{+} D^{-} K^{+}$ decay is measured to be $$\frac{\mathcal{B}\left(B^{+} \rightarrow D_s^{+} D_s^{-} K^{+}\right)}{\mathcal{B}\left(B^{+} \rightarrow D^{+} D^{-} K^{+}\right)}=0.525 \pm 0.033 \pm 0.027 \pm 0.034,$$ where the first uncertainty is statistical, the second systematic, and the third is due to the uncertainties on the branching fractions of the $D_s^{\pm} \rightarrow K^{\mp} K^{\pm} \pi^{\pm}$ and $D^{\pm} \rightarrow K^{\mp} \pi^{\pm} \pi^{\pm}$ decays. [...]
arXiv:2211.05034; LHCb-PAPER-2022-019; CERN-EP-2022-205.- Geneva : CERN, 2023-08-01 - 14 p. - Published in : Phys. Rev. Lett. 108 (2023) 034012 Fulltext: 2211.05034 - PDF; Publication - PDF; Related data file(s): ZIP;

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Study of the $B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-}$ decay / LHCb Collaboration
The decay $B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-}$ is studied in proton-proton collisions at a center-of-mass energy of $\sqrt{s}=13$ TeV using data corresponding to an integrated luminosity of 5 $\mathrm{fb}^{-1}$ collected by the LHCb experiment. In the $\Lambda_{c}^+ K^{-}$ system, the $\Xi_{c}(2930)^{0}$ state observed at the BaBar and Belle experiments is resolved into two narrower states, $\Xi_{c}(2923)^{0}$ and $\Xi_{c}(2939)^{0}$, whose masses and widths are measured to be $$ m(\Xi_{c}(2923)^{0}) = 2924.5 \pm 0.4 \pm 1.1 \,\mathrm{MeV}, \\ m(\Xi_{c}(2939)^{0}) = 2938.5 \pm 0.9 \pm 2.3 \,\mathrm{MeV}, \\ \Gamma(\Xi_{c}(2923)^{0}) = \phantom{000}4.8 \pm 0.9 \pm 1.5 \,\mathrm{MeV},\\ \Gamma(\Xi_{c}(2939)^{0}) = \phantom{00}11.0 \pm 1.9 \pm 7.5 \,\mathrm{MeV}, $$ where the first uncertainties are statistical and the second systematic. [...]
arXiv:2211.00812; CERN-EP-2022-196; LHCb-PAPER-2022-028.- Geneva : CERN, 2023-07-27 - 15 p. - Published in : Phys. Rev. D 108 (2023) 012020 Fulltext: Publication - PDF; LHCb_PAPER_2022_028 - PDF; 2211.00812 - PDF; Related data file(s): ZIP;

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Observation of the $B_s^{0} \rightarrow D^{*+}D^{*-}$ decay / LHCb Collaboration
The first observation of the $B_s^0 \to D^{\ast +} D^{\ast -}$ decay and the measurement of its branching ratio relative to the $B_d^0 \to D^{\ast +} D^{\ast -}$ decay are presented. The data sample used corresponds to an integrated luminosity of 9 $\text{fb}^{-1}$ of proton-proton collisions recorded by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV between 2011 and 2018. [...]
arXiv:2210.14945; LHCb-PAPER-2022-023; CERN-EP-2022-193; LHCB-PAPER-2022-023.- Geneva : CERN, 2023-07-13 - 12 p. - Published in : JHEP 2307 (2023) 119 Fulltext: LHCB-PAPER-2022-023 - PDF; document - PDF; 2210.14945 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Observation of a resonant structure near the $D_s^+ D_s^-$ threshold in the $B^+\to D_s^+ D_s^- K^+$ decay / LHCb Collaboration
An amplitude analysis of the $B^+\to D_s^+ D_s^- K^+$ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV. A near-threshold peaking structure, referred to as $X(3960)$, is observed in the $D_s^+ D_s^-$ invariant-mass spectrum with significance greater than 12 standard deviations. [...]
arXiv:2210.15153; CERN-EP-2022-200; LHCb-PAPER-2022-018.- Geneva : CERN, 2023-08-14 - 12 p. - Published in : Phys. Rev. Lett. 131 (2023) 071901 Fulltext: LHCb-PAPER-2022-018 - PDF; 2210.15153 - PDF; Publication - PDF; Related data file(s): ZIP;

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Search for the baryon- and lepton-number violating decays $B^0\to p\mu^-$ and $B^0_s\to p\mu^-$ / LHCb Collaboration
A search for the baryon- and lepton-number violating decays $B^0\to p\mu^-$ and $B^0_s\to p\mu^-$ is performed at the LHCb experiment using data collected in proton-proton collisions at $\sqrt{s}$ = 7, 8 and 13 TeV, corresponding to integrated luminosities of 1, 2 and 6 fb$^{-1}$, respectively. No significant signal for $B^0\to p\mu^-$ and $B^0_s\to p\mu^-$ decays is found and the upper limits on the branching fractions are determined to be ${\cal B}(B^0\to p\mu^-)<2.6\,(3.1)\times10^{-9}$ and ${\cal B}(B^0_s\to p\mu^-)<12.1\,(14.0)\times10^{-9}$, respectively, at 90$\%$ (95$\%$) confidence level. [...]
arXiv:2210.10412; CERN-EP-2022-195; LHCb-PAPER-2022-022.- Geneva : CERN, 2023-07-01 - 15 p. - Published in : Phys. Rev. D 108 (2023) 012021 Fulltext: Publication - PDF; 2210.10412 - PDF; Related data file(s): ZIP;

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Measurement of the CKM angle $γ$ with $ B^\pm \to D[K^\mp π^\pm π^\pm π^\mp] h^\pm$ decays using a binned phase-space approach / LHCb Collaboration
The CKM angle $\gamma$ is determined from $C\!P$-violating observables measured in ${B^\pm \to D[ K^\mp \pi^\pm\pi^\pm\pi^\mp] h^\pm}$, $(h = K,\pi)$ decays, where the measurements are performed in bins of the decay phase-space of the $D$ meson. Using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of $7, 8$ and $13\,\text{TeV}$, corresponding to a total integrated luminosity of $9\,\text{fb}^{-1}$, $\gamma$ is determined to be \begin{equation*} \gamma = \left( 54.8 \: ^{+\:6.0 }_{-\:5.8} \: ^{+\:0.6}_{-\:0.6} \: ^{+\:6.7}_{-\:4.3} \right)^\circ, \end{equation*} where the first uncertainty is statistical, the second systematic and the third from the external inputs on the coherence factors and strong phases of the $D$-meson decays..
arXiv:2209.03692; LHCb-PAPER-2022-017; CERN-EP-2022-150.- Geneva : CERN, 2023-07-17 - Published in : JHEP 2307 (2023) 138 Fulltext: 2209.03692 - PDF; LHCb-PAPER-2022-017 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Multidifferential study of identified charged hadron distributions in $Z$-tagged jets in proton-proton collisions at $\sqrt{s}=$13 TeV / LHCb Collaboration
Jet fragmentation functions are measured for the first time in proton-proton collisions for charged pions, kaons, and protons within jets recoiling against a $Z$ boson. The charged-hadron distributions are studied longitudinally and transversely to the jet direction for jets with transverse momentum 20 $< p_{\textrm{T}} < 100$ GeV and in the pseudorapidity range $2.5 < \eta < 4$. [...]
arXiv:2208.11691; CERN-EP-2022-161; LHCb-PAPER-2022-013.- Geneva : CERN, 2023-08 - 13 p. - Published in : Phys. Rev. D 108 (2023) L031103 Fulltext: LHCb-PAPER-2022-013 - PDF; Publication - PDF; 2208.11691 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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10.

Study of $B_c^+$ meson decays to charmonia plus multihadron final states / LHCb Collaboration
Four decay modes of the $B_c^+$ meson into a $J/\psi$~meson and multiple charged kaons or pions are studied using proton-proton collision data, collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV and corresponding to an integrated luminosity of $9$fb$^{-1}$.The decay $B_c^+\to J/\psi K^+ K^- \pi^+ \pi^+ \pi^-$ is observed for the first time, and evidence for the $B_c^+\to J/\psi 4\pi^+ 3\pi^-$ decay is found. The decay $B_c^+\to J/\psi 3\pi^+ 2\pi^-$ is observed and the previous observation of the $B_c^+\to\psi(2S) \pi^+ \pi^+ \pi^-$decay is confirmed using the $\psi(2S) \to J/\psi \pi^+ \pi^-$ decay mode. [...]
arXiv:2208.08660; CERN-EP-2022-162; LHCb-PAPER-2022-025.- Geneva : CERN, 2023-07-26 - 20 p. - Published in : JHEP 2307 (2023) 198 Fulltext: 2208.08660 - PDF; document - PDF; Related data file(s): ZIP;

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Vegeu també: autors amb noms similars
199	Ma, L
1	Ma, L -S
1	Ma, L B
4	Ma, L H
137	Ma, L L
1	Ma, L S
2	Ma, L Z
49	Ma, L.
2	Ma, L.-T.
36	Ma, L.L.
1	Ma, Lei
62	Ma, Li
1	Ma, Li-Hua
1	Ma, Li-Zhen
742	Ma, Lian Liang
721	Ma, LianLiang
13	Ma, Liang
1	Ma, Liangping
721	Ma, Lianliang
2	Ma, Lianrong
4	Ma, Libo
1	Ma, Lifang
1	Ma, Lifeng
2	Ma, Lijia
4	Ma, Lijun
5	Ma, Lili
1	Ma, Limin
7	Ma, Lin
1	Ma, Lina
1	Ma, Ling-Ling
1	Ma, Lingjie
1	Ma, Linquan
4	Ma, Lizhen
6	Ma, Long
7	Ma, Longhua
1	Ma, Longsheng
2	Ma, Lu
1	Ma, Luming

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