Maev, O. - Резултати от търсенето

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Observation of the $B^0_s\rightarrow \chi_{c1}(3872)\pi^+\pi^-$ decay / LHCb Collaboration
The first observation of the $B^0_s \rightarrow \left( \chi_{c1}(3872) \rightarrow J/\psi\pi^+\pi^-\right) \pi^+ \pi^-$ decay is reported using proton-proton collision data, corresponding to integrated luminosities of 1, 2 and 6fb$^{-1}$, collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13TeV, respectively. The ratio of branching fractions relative to the $B^0_s \rightarrow \left( \psi(2S) \rightarrow J\psi\pi^+\pi^- \right) \pi^+ \pi^-$ decay is measured to be $$ \frac{ \mathcal{B} \left( B^0_s \rightarrow \chi_{c1}(3872) \pi^+\pi^-\right) \times \mathcal{B} \left( \chi_{c1}(3872) \rightarrow J\psi\pi^+\pi^-\right)} { \mathcal{B} \left( B^0_s \rightarrow \psi(2S) \pi^+ \pi^- \right) \times \mathcal{B} \left( \psi(2S) \rightarrow J\psi\pi^+\pi^-\right) } = \left( 6.8 \pm 1.1 \pm 0.2 \right) \times 10^{-2} , $$ where the first uncertainty is statistical and the second systematic. [...]
arXiv:2302.10629; CERN-EP-2023-015; LHCb-PAPER-2022-049; LHcb-PAPER-2022-049.- Geneva : CERN, 2023-07-11 - 18 p. - Published in : JHEP 2307 (2023) 084 Fulltext: LHCb-PAPER-2022-049 - PDF; 2302.10629 - PDF; document - PDF; Related data file(s): ZIP;

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First measurement of $Z \to \mu^+\mu^-$ angular coefficients in the forward region of $pp$ collisions at $\sqrt{s} = 13$ TeV / LHCb Collaboration
The first study of the angular distribution of $\mu^+ \mu^-$ pairs produced in the forward rapidity region via the Drell-Yan reaction $pp \rightarrow \gamma^{*}/Z +X \rightarrow l^+ l^- + X$ is presented, using data collected with the LHCb detector at a centre-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.1 $\rm{fb}^{-1}$. The coefficients of the five leading terms in the angular distribution are determined as a function of the dimuon transverse momentum and rapidity. [...]
arXiv:2203.01602; LHCb-PAPER-2021-048; CERN-EP-2022-030; LHCB-PAPER-2021-048.- 2022-08-24 - 11 p. - Published in : Phys. Rev. Lett. 129 (2022) 091801 Fulltext: PDF; Related data file(s): ZIP; External link: Previous draft version

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Search for the lepton-flavour violating decays $B^0 \to K^{*0} \mu^\pm e^\mp$ and $B_s^0 \to \phi \mu^\pm e^\mp$ / LHCb Collaboration
A search for the lepton-flavour violating decays $B^0 \to K^{*0} \mu^\pm e^\mp$ and $B_s^0 \to \phi \mu^\pm e^\mp$ is presented, using proton-proton collision data collected by the LHCb detector at the LHC, corresponding to an integrated luminosity of $9\,\text{fb}^{-1}$. No significant signals are observed and upper limits of \begin{align} {\cal B}( B^0 \to K^{*0} \mu^+ e^- ) &< \phantom{1}5.7\times 10^{-9}~(6.9\times 10^{-9}),\newline {\cal B}( B^0 \to K^{*0} \mu^- e^+ ) &< \phantom{1}6.8\times 10^{-9}~(7.9\times 10^{-9}),\newline {\cal B}( B^0 \to K^{*0} \mu^\pm e^\mp ) &< 10.1\times 10^{-9}~(11.7\times 10^{-9}),\newline {\cal B}( B_s^0 \to \phi \mu^\pm e^\mp ) &< 16.0\times 10^{-9}~(19.8\times 10^{-9}) \end{align} are set at $90\%~(95\%)$ confidence level. [...]
arXiv:2207.04005; LHCb-PAPER-2022-008; CERN-EP-2022-097; LHCB-PAPER-2022-008.- Geneva : CERN, 2023-06-14 - 18 p. - Published in : JHEP 2306 (2023) 073 Fulltext: document - PDF; 2207.04005 - PDF; LHCb-PAPER-2022-008_v2.1 - PDF; Related data file(s): ZIP;

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A Method Based on Muon System to Monitor LHCb Luminosity / Albicocco, Pietro (Frascati) ; Baldini, Wander (INFN, Ferrara) ; Belin, Samuel (Santiago de Compostela U., IGFAE) ; Bocci, Valerio (Rome U. ; INFN, Rome) ; Bondar, Nikolay (St. Petersburg, INP) ; Brundu, Davide (INFN, Cagliari ; Cagliari U.) ; Cadeddu, Sandro (INFN, Cagliari ; Cagliari U.) ; Cardini, Alessandro (INFN, Cagliari ; Cagliari U.) ; Carletti, Maurizio (Frascati) ; Chiodi, Giacomo (Rome U. ; INFN, Rome) et al.
LHCb is one of the four main experiments running at the Large Hadron Collider (LHC) of the European Organization for Nuclear Research. Since 2010, it has been collecting data to study the Physics of b and c quarks. [...]
2022 - 13 p. - Published in : Symmetry 14 (2022) 860 Fulltext: PDF;

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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: PhysRevD.105.092013 - PDF; 2202.09106 - PDF; LHCb-PAPER-2021-041 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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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; document - PDF; 2202.05648 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Study of charmonium and charmonium-like contributions in $B^+ \rightarrow J/\psi \eta K^+$ decays / LHCb Collaboration
A study of $B^+ \rightarrow J/\psi \eta K^+$ decays, followed by $J/\psi \rightarrow \mu^+ \mu^-$ and $\eta \rightarrow \gamma \gamma$, is performed using a dataset collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb$^{-1}$. The $J/\psi\eta$ mass spectrum is investigated for contributions from charmonia and charmonium-like states. [...]
arXiv:2202.04045; CERN-EP-2022-009; LHCb-PAPER-2021-047; LHCB-PAPER-2021-047.- Geneva : CERN, 2022-04 - 31 p. - Published in : JHEP 2020 (2022) 046 Fulltext: PDF; Related data file(s): LHCb-PAPER-2021-047-figures - ZIP; LHCb-PAPER-2021-047 - PDF;

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Search for the decay $B^0\to\phi\mu^+\mu^-$ / LHCb Collaboration
A search for the decay $B^0\to\phi\mu^+\mu^-$ is performed using proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV collected by the LHCb experiment and corresponding to an integrated luminosity of 9 fb$^{-1}$. No evidence for the $B^0\to \phi \mu^+ \mu^-$ decay is found and an upper limit on the branching fraction, excluding the $\phi$ and charmonium regions in the dimuon spectrum, of $4.4 \times 10^{-3}$ at a 90$\%$ credibility level, relative to that of the $B^0_s \to \phi \mu^+ \mu^-$ decay, is established. [...]
arXiv:2201.10167; LHCb-PAPER-2021-042; CERN-EP-2021-267.- 2022 - 21 p. - Published in : 10.1007/JHEP05(2022)067 Fulltext: PDF;

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Observation of the decay $ \Lambda_b^0\rightarrow \Lambda_c^+\tau^-\overline{\nu}_{\tau}$ / LHCb Collaboration
The first observation of the semileptonic $b$-baryon decay $ \Lambda_b^0 \rightarrow \Lambda_c^+ \tau^-\overline{\nu}_{\tau}$, with a significance of $6.1\,\sigma$, is reported using a data sample corresponding to 3 fb$^{-1}$ of integrated luminosity, collected by the LHCb experiment at centre-of-mass energies of 7 and 8~TeV at the LHC. The $\tau^-$ lepton is reconstructed in the hadronic decay to three charged pions. [...]
arXiv:2201.03497; LHCb-PAPER-2021-044; CERN-EP-2021-265; LHCB-PAPER-2021-044.- Geneva : CERN, 2022-05-13 - 21 p. - Published in : Phys. Rev. Lett. 128 (2022) 191803 Fulltext: 2201.03497 - PDF; PhysRevLett.128.191803 - PDF; Related data file(s): ZIP; Supplementary material: ZIP;

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10.

Observation of the $B^0\rightarrow\overline{D}^{*0}K^{+}\pi^{-}$ and $B_s^0\rightarrow\overline{D}^{*0}K^{-}\pi^{+}$ decays / LHCb Collaboration
The first observations of $B^0\rightarrow\overline{D}^{*}(2007)^{0}K^{+}\pi^{-}$ and $B_s^0\rightarrow\overline{D}^{*}(2007)^{0}K^{-}\pi^{+}$ decays are presented, and their branching fractions relative to that of the $B^0\rightarrow\overline{D}^{*}(2007)^{0}\pi^{+}\pi^{-}$ decay are reported. These modes can potentially be used to investigate the spectroscopy of charm and charm-strange resonances and to determine the angle $\gamma$ of the CKM unitarity triangle. [...]
arXiv:2112.11428; LHCb-PAPER-2021-043; CERN-EP-2021-262; LHCB-PAPER-2021-043.- Geneva : CERN, 2022-04-01 - 32 p. - Published in : Phys. Rev. D 105 (2022) 072005 Fulltext: LHCb-PAPER-2021-043 - PDF; 2112.11428 - PDF; Publication - PDF; Related data file(s): ZIP;

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Виж също: автори с подобни имена
216	Maev, O
10	Maev, O E
520	Maev, Oleg

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