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CERN Document Server 439 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 1.30 δευτερόλεπτα. 
1.
A search for rare $B \to D \mu^+\mu^-$ decays / LHCb Collaboration
A search for rare $B \rightarrow D \mu^+ \mu^-$ decays is performed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb$^{-1}$. No significant signals are observed in the non-resonant $\mu^+\mu^-$ modes, and upper limits of $\mathcal{B}(B^0 \rightarrow \overline{D}^0 \mu^+ \mu^-) < 5.1 \times 10^{-8}$, $\mathcal{B}(B^+ \rightarrow D_s^+ \mu^+ \mu^-) < 3.2 \times 10^{-8}$, $\mathcal{B}(B_s^0 \rightarrow \overline{D}^0 \mu^+ \mu^-) < 1.6 \times 10^{-7}$ and $f_c/f_u \cdot \mathcal{B}(B_c^+ \rightarrow D_s^+ \mu^+ \mu^-) < 9.6 \times 10^{-8}$ are set at the 95 % confidence level, where $f_c$ and $f_u$ are the fragmentation fractions of a $B$ meson with a $c$ and $u$ quark respectively in proton-proton collisions. [...]
arXiv:2308.06162; LHCb-PAPER-2022-048; CERN-EP-2023-121; LHCB-PAPER-2022-048.- Geneva : CERN, 2024-02-07 - 23 p. - Published in : JHEP 2402 (2024) 032 Fulltext: document - PDF; 2308.06162 - PDF; Related data file(s): ZIP;
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2.
$\Lambda_c^+$ polarimetry using the dominant hadronic mode / LHCb Collaboration
The polarimeter vector field for multibody decays of a spin-half baryon is introduced as a generalisation of the baryon asymmetry parameters. Using a recent amplitude analysis of the $\Lambda_c^+ \to p K^- \pi^+$ decay performed at the LHCb experiment, we compute the distribution of the kinematic-dependent polarimeter vector for this process in the space of Mandelstam variables to express the polarised decay rate in a model-agnostic form. [...]
arXiv:2301.07010; LHCb-PAPER-2022-044; CERN-EP-2022-287.- Geneva : CERN, 2023-07-31 - 20 p. - Published in : JHEP 2307 (2023) 228 Fulltext: document - PDF; LHCb-PAPER-2022-044 - PDF; 2301.07010 - PDF; Related data file(s): ZIP;
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3.
Study of the Bose-Einstein correlations of same-sign pions in proton-lead collisions / LHCb Collaboration
Correlations of same-sign charged particles are analysed using proton-lead collision data collected by the LHCb experiment at a nucleon-nucleon centre-of-mass energy of 5.02 $\textrm{TeV}$, corresponding to an integrated luminosity of 1.06 nb$^{-1}$. Bose-Einstein correlations are observed in the form of an enhancement of pair production for same-sign charged pions with a small four-momentum difference squared. [...]
arXiv:2306.09755; LHCb-PAPER-2023-002; CERN-EP-2023-096.- Geneva : CERN, 2023-09-26 - 29 p. - Published in : JHEP 2309 (2023) 172 Fulltext: 2306.09755 - PDF; LHCb-PAPER-2023-002 - PDF; document - PDF; Publication - PDF; Related data file(s): ZIP;
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4.
Evidence for the decays $B^{0}\rightarrow\bar{D}^{(*)0}\phi$ and updated measurements of the branching fractions of the $B^{0}_{s}\rightarrow\bar{D}^{(*)0}\phi$ decays / LHCb Collaboration
Evidence for the decays $B^{0}\rightarrow\bar{D}^{0}\phi$ and $B^{0} \rightarrow \bar{D}^{*0}\phi$ is reported with a significance of 3.6$\,\sigma$ and 4.3$\,\sigma$, respectively. The analysis employs $pp$ collision data at centre-of-mass energies $\sqrt{s}=7$, 8 and 13 TeV collected by the LHCb detector and corresponding to an integrated luminosity of 9 $\rm{fb}^{-1}$ [...]
arXiv:2306.02768; LHCb-PAPER-2023-003,CERN-EP-2023-077; CERN-EP-2023-077; LHCB-PAPER-2023-003; LHCB-PAPER-2023-003.- Geneva : CERN, 2023-10-20 - 26 p. - Published in : JHEP 2310 (2023) 123 Fulltext: 2306.02768 - PDF; arXiv version - PDF; document - PDF; Related data file(s): ZIP;
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5.
Associated production of prompt $J/\psi$ and $\mathit{\Upsilon}$ mesons in $pp$ collisions at $\sqrt{s}=13\,\mathrm{TeV}$ / LHCb Collaboration
The associated production of prompt $J/\psi$ and $\mathit{\mathit{\Upsilon}}$ mesons in $pp$ collisions at a centre-of-mass energy of $\sqrt{s}=13\,\mathrm{TeV}$ is studied using LHCb data, corresponding to an integrated luminosity of $4\,\mathrm{fb}^{-1}$. The measurement is performed for $J/\psi$ ($\mathit{\Upsilon}$) mesons with a transverse momentum $p_{\mathrm{T}}<10\,(30)\mathrm{GeV}/c$ in the rapidity range $2.0 < y < 4.5$. [...]
arXiv:2305.15580; LHCb-PAPER-2022-047; CERN-EP-2023-078.- Geneva : CERN, 2023-08-17 - 24 p. - Published in : JHEP 2308 (2023) 093 Fulltext: 2305.15580 - PDF; document - PDF; Related data file(s): ZIP;
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6.
Measurement of the mass difference and relative production rate of the $\Omega^-_b$ and $\Xi^-_b$ baryons / LHCb Collaboration
The mass difference between the $\Omega^-_b$ and $\Xi^-_b$ baryons is measured using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of $9 \, \textrm{fb}^{-1}$, and is found to be \begin{equation} m(\Omega^-_b)- m(\Xi^-_b) = 248.54 \pm 0.51 \textrm{(stat)} \pm 0.38 \textrm{(syst)} \, \textrm{MeV}/c^2. \end{equation} The mass of the $\Omega^-_b$ baryon is measured to be \begin{equation} m(\Omega^-_b)= 6045.9 \pm 0.5 \textrm{(stat)} \pm 0.6 \textrm{(syst)} \, \textrm{MeV}/c^2. [...]
arXiv:2305.15329; LHCb-PAPER-2022-053; CERN-EP-2023-086.- Geneva : CERN, 2023-09-01 - 23 p. - Published in : Phys. Rev. D 108 (2023) 052008 Fulltext: Publication - PDF; 2305.15329 - PDF; Related data file(s): ZIP;
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7.
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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8.
Measurement of $\Xi^{+}_{c}$ production in pPb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV at LHCb / LHCb Collaboration
A study of prompt $\Xi_{c}^{+}$ production in proton-lead collisions is performed with the LHCb experiment at a centre-of-mass energy per nucleon pair of 8.16 TeV in 2016 in $p$Pb and Pb$p$ collisions with an estimated integrated luminosity of approximately 12.5 and 17.4 nb$^{-1}$, respectively. The $\Xi_{c}^{+}$ production cross-section, as well as the $\Xi_{c}^{+}$ to $\Lambda_{c}^{+}$ production cross-section ratio, are measured as a function of the transverse momentum and rapidity and compared to latest theory predictions. [...]
arXiv:2305.06711; LHCb-PAPER-2022-041; CERN-EP-2023-057.- Geneva : CERN, 2024-04-01 - 20 p. - Published in : Phys. Rev. C 109 (2024) 044901 Fulltext: Publication - PDF; 2305.06711 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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9.
Test of lepton flavour universality using $B^0 \to D^{*-}\tau^+\nu_{\tau}$ decays with hadronic $\tau$ channels / LHCb Collaboration
The branching fraction $\mathcal{B}(B^0 \to D^{*-}\tau^+\nu_\tau)$ is measured relative to that of the normalisation mode $B^0 \to D^{*-}\pi^+\pi^-\pi^+$ using hadronic $\tau^+ \to \pi^+\pi^-\pi^+(\pi^0)\bar{\nu}_\tau$ decays in proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 2 fb$^{-1}$. The measured ratio is $\mathcal{B}(B^0 \to D^{*-}\tau^+\nu_\tau)/\mathcal{B}(B^0 \to D^{*-}\pi^+\pi^-\pi^+)= 1.79 \pm 0.11 \pm 0.11$, where the first uncertainty is statistical and the second is related to systematic effects. [...]
arXiv:2305.01463; LHCb-PAPER-2022-052; CERN-EP-2023-062.- Geneva : CERN, 2023-07-01 - 18 p. - Published in : Phys. Rev. D Fulltext: LHCb-PAPER-2022-052 - PDF; Publication - PDF; 2305.01463 - PDF; Related data file(s): ZIP;
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10.
Study of charmonium decays to $K^0_S K \pi$ in the $B \to (K^0_S K \pi) K$ channels / LHCb Collaboration
A study of the $B^+\to K^0_SK^+K^-\pi^+$ and $B^+\to K^0_SK^+K^+\pi^-$ decays is performed using proton-proton collisions at center-of-mass energies of 7, 8 and 13 TeV at the LHCb experiment. The $K^0_SK \pi$ invariant mass spectra from both decay modes reveal a rich content of charmonium resonances. [...]
arXiv:2304.14891; LHCb-PAPER-2022-051; CERN-EP-2023-060.- Geneva : CERN, 2023-08-01 - 60 p. - Published in : Phys. Rev. D 108 (2023) 032010 Fulltext: Publication - PDF; 2304.14891 - PDF; LHCb-PAPER-2022-051 - PDF; Related data file(s): ZIP;
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CERN Document Server : 439 εγγραφές βρέθηκαν   1 - 10επόμενοτέλος  μετάβαση στην εγγραφή:
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