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CERN Document Server 345 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 0.59 δευτερόλεπτα. 
1.
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: document - PDF; 2305.10515 - PDF;
In : The Large Hadron Collider and The Experiments for Run 3
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2.
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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3.
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: 2204.12597 - PDF; Publication - PDF; LHCb-PAPER-2021-045 - PDF; Related data file(s): ZIP;
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4.
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: Publication - PDF; LHCb-PAPER-2021-053 - PDF; 2204.10608 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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5.
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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6.
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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7.
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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8.
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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9.
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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10.
Constraints on the CKM angle $\gamma$ from $B^\pm\rightarrow Dh^\pm$ decays using $D\rightarrow h^\pm h^{\prime\mp}\pi^0$ final states / LHCb Collaboration
A data sample collected with the LHCb detector, corresponding to an integrated luminosity of $9~{\rm fb}^{-1}$, is used to measure $CP$ observables in $B^\pm \to D h^\pm$ decays, where $h^{(\prime)}$ is either a kaon or a pion, and the neutral $D$ meson decay is reconstructed in the three-body final states $K^\pm \pi^\mp \pi^0$, $\pi^\pm \pi^\mp \pi^0$, and $K^\pm K^\mp \pi^0$. The most suppressed of these modes, $B^\pm \to [\pi^\pm K^\mp \pi^0]_D K^\pm$, is observed with a significance greater than seven standard deviations and constraints on the CKM angle $\gamma$ are calculated from the combination of the measurements..
arXiv:2112.10617; LHCb-PAPER-2021-036; CERN-EP-2021-255; LHCB-PAPER-2021-036.- Geneva : CERN, 2022-07-15 - 24 p. - Published in : JHEP 2207 (2022) 099 Fulltext: document - PDF; 2112.10617 - PDF; Related data file(s): ZIP;
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CERN Document Server : 345 εγγραφές βρέθηκαν   1 - 10επόμενοτέλος  μετάβαση στην εγγραφή:
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223 Hynds, D
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