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Measurement of the emittance of accelerated electron bunches at the AWAKE experiment / AWAKE Collaboration
The vertical plane transverse emittance of accelerated electron bunches at the AWAKE experiment at CERN has been determined, using three different methods of data analysis. [...]
arXiv:2411.08681. - 20.
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Measurement of the effective leptonic weak mixing angle / LHCb Collaboration
Using $pp$ collision data at $\sqrt{s}=13$~TeV, recorded by the LHCb experiment between 2016 and 2018 and corresponding to an integrated luminosity of $5.4$~fb$^{-1}$, the forward-backward asymmetry in the $pp \to Z/\gamma^{*} \to \mu^+\mu^-$ process is measured. The measurement is carried out in ten intervals of the difference between the muon pseudorapidities, within a fiducial region covering dimuon masses between $66$ and $116$ GeV, muon pseudorapidities between $2.0$ and $4.5$ and muon transverse momenta above $20$ GeV. [...]
arXiv:2410.02502; LHCb-PAPER-2024-028; CERN-EP-2024-230.- Geneva : CERN, 2024-12-03 - 26 p. - Published in : JHEP 2412 (2024) 026 Fulltext: LHCb-PAPER-2024-028 - PDF; 2410.02502 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: LHCb-PAPER-2024-028-supplementary - ZIP; supplementary (3) - PDF;

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Analysis of $\it{\Lambda}^\mathrm{0}_b \rightarrow pK^-\mu^+\mu^-$ decays / LHCb Collaboration
The differential branching fraction and angular coefficients of ${\it{\Lambda}^\mathrm{0}_b \rightarrow pK^-\mu^+\mu^-}$ decays are measured in bins of the dimuon mass squared and dihadron mass. The analysis is performed using a data set corresponding to 9$fb^-1$ of integrated luminosity collected with the $\mbox{LHCb}$ detector between 2011 and 2018. [...]
arXiv:2409.12629; CERN-EP-2024-212; LHCb-PAPER-2024-024.- Geneva : CERN, 2024-12-19 - 33 p. - Published in : JHEP 2412 (2024) 147 Fulltext: 2409.12629 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Measurement of $CP$ violation in $B^0 \to D^+D^-$ and $B_s^0 \to D_s^+D_s^-$ decaysMeasurement of CP violation in B$^{0}$→ D$^{+}$D$^{−}$ and $ {\textrm{B}}_{\textrm{s}}^0 $→$ {\textrm{D}}_{\textrm{s}}^{+}{\textrm{D}}_{\textrm{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$^{-1}$. In ${B^0}\rightarrow{D^{+}D^{-}}$ decays the $CP$-violation parameters are measured to be \begin{align} S_{D^{+}D^{-}} & = -0.552 \pm 0.100\text{(stat)} \pm 0.010\text{(syst)}, \nonumber \newline C_{D^{+}D^{-}} & = \phantom{-}0.128 \pm0.103\text{(stat)} \pm 0.010\text{(syst)}. [...]
arXiv:2409.03009; LHCb-PAPER-2024-027; CERN-EP-2024-217; LHCB-PAPER-2024-027.- Geneva : CERN, 2025-01-09 - 26 p. - Published in : JHEP 2501 (2025) 061 Fulltext: 2409.03009 - PDF; document - PDF; Related data file(s): ZIP;

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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 $5.4\,\text{fb}^{-1}$. The rate of this decay is measured relative to that of the $J\mskip -3mu/\mskip -2mu\psi \to \mu^+\mu^-$ mode. [...]
arXiv:2408.16646; LHCb-PAPER-2024-016; CERN-EP-2024-201; LHCB-PAPER-2024-016.- Geneva : CERN, 2024-12-10 - 26 p. - Published in : JHEP 2412 (2024) 062 Fulltext: 2408.16646 - PDF; document - PDF; Related data file(s): ZIP;

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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$^{-1}$. The newly observed decays together with the $\Upsilon(2S)\rightarrow \Upsilon(1S)\pi^+\pi^-$ and $\Upsilon(3S)\rightarrow \Upsilon(2S)\pi^+\pi^-$ decay modes are used for precision measurements of the mass and mass splittings for the hidden-beauty states..
arXiv:2408.05134; LHCb-PAPER-2024-025; CERN-EP-2024-207.- Geneva : CERN, 2024-10-16 - 29 p. - Published in : JHEP 2410 (2024) 122 Fulltext: 2408.05134 - PDF; Publication - PDF; Related data file(s): ZIP;

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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. The study is performed using a data sample corresponding to an integrated luminosity of $2.2\,\rm{fb}^{-1}$ collected in 2018 with the $\mbox{LHCb}$ detector. [...]
arXiv:2407.14261; LHCb-PAPER-2024-004; CERN-EP-2024-165; LHCB-PAPER-2024-004.- Geneva : CERN, 2024-12-09 - 32 p. - Published in : Eur. Phys. J. C 84 (2024) 1274 Fulltext: 2407.14261 - PDF; document - PDF; Related data file(s): ZIP;

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Amplitude analysis of $B^+\to \psi(2S) K^+ \pi^+\pi^-$ decays / Aaij, Roel (Nikhef, Amsterdam) ; Abdelmotteleb, Ahmed Sameh Wagih (Warwick U.) ; Abellan Beteta, Carlos (Zurich U.) ; Abudinén, Fernando Jesus (Warwick U.) ; Ackernley, Thomas (Liverpool U.) ; Adefisoye, A.A. (Syracuse U. (main)) ; Adefisoye, Ayomide Matthew (Syracuse U.) ; Adeva, Bernardo (U. Santiago de Compostela (main)) ; Adinolfi, Marco (Bristol U.) ; Adlarson, Patrik Harri (Uppsala U.) et al.
The first full amplitude analysis of $B^+ \to \psi(2S) K^+ \pi^+ \pi^-$ decays is performed using proton-proton collision data corresponding to an integrated luminosity of $9\,\text{fb}^{-1}$ recorded with the LHCb detector. The rich $K^+ \pi^+ \pi^-$ spectrum is studied and the branching fractions of the resonant substructure associated with the prominent $K_1(1270)^+$ contribution are measured. [...]
arXiv:2407.12475; LHCb-PAPER-2024-014; CERN-EP-2024-177; LHCB-PAPER-2024-014.- Geneva : CERN, 2025-01-08 - 69 p. - Published in : JHEP 2501 (2025) 054 Fulltext: 2407.12475 - PDF; document - PDF; Related data file(s): ZIP;

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Experimental Observation of Motion of Ions in a Resonantly Driven Plasma Wakefield Accelerator / AWAKE Collaboration
We show experimentally that an effect of motion of ions, observed in a plasma-based accelerator, depends inversely on the plasma ion mass. [...]
arXiv:2406.16361. - 9.
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10.

Comprehensive analysis of local and nonlocal amplitudes in the $B^0 \to K^{*0} \mu^+\mu^-$ decay / LHCb Collaboration
A comprehensive study of the local and nonlocal amplitudes contributing to the decay $B^0\rightarrow K^{*0}(\to K^+\pi^-) \mu^+\mu^-$ is performed by analysing the phase-space distribution of the decay products. The analysis is based on $pp$ collision data corresponding to an integrated luminosity of 8.4fb$^{-1}$ collected by the LHCb experiment. [...]
arXiv:2405.17347; LHCb-PAPER-2024-011; CERN-EP-2024-122; LHCB-PAPER-2024-011.- Geneva : CERN, 2024-09-05 - 60 p.
Fulltext: 2405.17347 - PDF; document - PDF; Related data file(s): ZIP;

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Voir aussi: noms d'auteurs similaires
8	Fonseca, R
59	Fonseca, R A
5	Fonseca, R C
3	Fonseca, R M
14	Fonseca, R.A.
1	Fonseca, RA
1	Fonseca, Renato
12	Fonseca, Renato M
1	Fonseca, Renato M.
7	Fonseca, Ricardo
16	Fonseca, Ricardo A
2	Fonseca, Rui

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