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CERN Document Server 289 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 1.70 secondes. 
1.
Radiation Hardness Qualification of the Amplifier/Discriminator ASICs Production for the Upgrade of the LHCb RICH Detector Front-end Electronics / Andreotti, Mirco (Ferrara U. ; INFN, Ferrara) ; Baszczyk, Mateusz (AGH-UST, Cracow ; Cracow, INP) ; Bolognesi, Manuel (Ferrara U. ; INFN, Ferrara) ; Calabrese, Roberto (Ferrara U. ; INFN, Ferrara) ; Carniti, Paolo (INFN, Milan Bicocca ; Milan Bicocca U.) ; Cassina, Lorenzo (INFN, Milan Bicocca ; Milan Bicocca U.) ; Cotta Ramusino, Angelo (Ferrara U. ; INFN, Ferrara) ; Dorosz, Piotr (AGH-UST, Cracow ; Cracow, INP) ; Fiorini, Massimiliano (Ferrara U. ; INFN, Ferrara) ; Giachero, Andrea (INFN, Milan Bicocca ; Milan Bicocca U.) et al.
Thirty-three-thousand CLARO8 ASICs were produced in 0.35μm CMOS technology and will be installed in the upgraded LHCb detector at CERN. Radiation hardness has been extensively characterized and compared to prototype production..
2018 - 4 p. - Published in : 10.1109/NSREC.2018.8584280
In : 2018 IEEE Radiation Effects Data Workshop, Waikoloa Village, HI, USA, 16 - 20 Jul 2018, pp.8584280
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2.
Measurements of $CP$ asymmetries in charmless four-body $\Lambda^0_b$ and $\Xi_b^0$ decays / LHCb Collaboration
A search for $CP$ violation in charmless four-body decays of $\Lambda^0_b$ and $\Xi_b^0$ baryons with a proton and three charged mesons in the final state is performed. To cancel out production and detection charge-asymmetry effects, the search is carried out by measuring the difference between the $CP$ asymmetries in a charmless decay and in a decay with an intermediate charmed baryon with the same particles in the final state. [...]
arXiv:1903.06792; LHCb-PAPER-2018-044; CERN-EP-2019-13; LHCb-PAPER-2018-044 and CERN-EP-2019-13; LHCB-PAPER-2018-044.- 2019-09-07 - 30 p. - Published in : Eur. Phys. J. C Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
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3.
Dalitz Plot analysis of the $D^+ \to K^- K^+ K^+$ decay / LHCb Collaboration
The resonant structure of the doubly Cabibbo-suppressed decay $D^+\to K^-K^+K^+$ is studied for the first time. The measurement is based on a sample of $pp$-collision data, collected at a centre-of-mass energy of 8 TeV with the LHCb detector and corresponding to an integrated luminosity of 2 fb$^-1$. [...]
arXiv:1902.05884; LHCb-PAPER-2018-039; CERN-EP-2018-336.- Geneva : CERN, 2019-04-08 - 37 p. - Published in : JHEP 04 (2019) 063 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
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4.
Measurement of the ratio of branching fractions of the decays $\Lambda_b^0 \!\to \psi(2S) \Lambda$ and $\Lambda_b^0 \!\to J\!/\!\psi \Lambda$ / LHCb Collaboration
Using $pp$ collisions corresponding to 3$\,\text{fb}^{-1}$ integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8$\,\text{TeV}$, the ratio of branching fractions \begin{align*} \mathcal{B}(\Lambda^0_b\!\to\psi(2S) \Lambda )/\mathcal{B}(\Lambda^0_b\!\to J/\psi \Lambda)= 0.513 \pm 0.023\, (\text{stat}) \pm 0.016 \, (\text{syst}) \pm 0.011\, (\mathcal{B}) \end{align*} is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used..
arXiv:1902.02092; LHCb-PAPER-2017-041; CERN-EP-2019-003.- Geneva : CERN, 2019-03-22 - 16 p. - Published in : JHEP 03 (2019) 126 Article from SCOAP3: PDF; Fulltext: LHCb-Paper-2017-041 - PDF; 1902.02092 - PDF; Related data file(s): ZIP;
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5.
Observation of the doubly Cabibbo-suppressed decay $\Xi_{c}^{+}\to p\phi$ / LHCb Collaboration
The doubly Cabibbo-suppressed decay $\Xi_{c}^{+}\to p\phi$ with $\phi\to K^{+}K^{-}$ is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb$^{-1}$ recorded with the LHCb detector in $pp$ collisions at a centre-of-mass energy of 8 TeV. [...]
arXiv:1901.06222; LHCb-PAPER-2018-040; CERN-EP-2018-349.- 2019-04-10 - 17 p. - Published in : JHEP 04 (2019) 084 Article from SCOAP3: PDF; Fulltext: PDF;
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6.
Model-independent observation of exotic contributions to $B^0\to J/\psi K^+\pi^-$ decays / LHCb Collaboration
An angular analysis of $B^0\to J/\psi K^+\pi^-$ decays is performed, using proton-proton collision data corresponding to an integrated luminosity of 3 ${\rm fb}^{-1}$ collected with the LHCb detector. The $m(K^+\pi^-)$ spectrum is divided into fine bins. [...]
arXiv:1901.05745; LHCb-PAPER-2018-043; CERN-EP-2018-330.- Geneva : CERN, 2019-04-18 - 10 p. - Published in : Phys. Rev. Lett. 122 (2019) 152002 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP;
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7.
Measurement of the branching fraction and $C\!P$ asymmetry in $B^{+}\rightarrow J/\psi \rho^{+}$ decays / LHCb Collaboration
The branching fraction and direct $C\!P$ asymmetry of the decay $B^{+}\rightarrow J/\psi \rho^{+}$ are measured using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to a total integrated luminosity of 3$\mbox{fb}^{-1}$. The following results are obtained: \begin{align} \mathcal{B}(B^{+}\rightarrow J/\psi \rho^{+}) &= (3.81 ^{+0.25}_{-0.24} \pm 0.35) \times 10^{-5}, \nonumber \\ \mathcal{A}^{C\!P} (B^{+}\rightarrow J/\psi \rho^{+}) &= -0.045^{+0.056}_{-0.057} \pm 0.008, \nonumber \end{align} where the first uncertainties are statistical and the second systematic. [...]
arXiv:1812.07041; LHCb-PAPER-2018-036; CERN-EP-2018-298; LHCB-PAPER-2018-036.- Geneva : CERN, 2019-06-24 - 21 p. - Published in : Eur. Phys. J. C 79 (2019) 537 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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8.
Search for the rare decay $B^{+} \rightarrow \mu^{+}\mu^{-}\mu^{+}\nu_{\mu}$ / LHCb Collaboration
A search for the rare leptonic decay $B^{+} \rightarrow \mu^{+}\mu^{-}\mu^{+}\nu_{\mu}$ is performed using proton-proton collision data corresponding to an integrated luminosity of $4.7$ fb$^{-1}$ collected by the LHCb experiment. The search is carried out in the region where the lowest of the two $\mu^{+}\mu{-}$ mass combinations is below $980$ MeV/$c^{2}$. [...]
arXiv:1812.06004; CERN-EP-2018-293; LHCb-PAPER-2018-037.- Geneva : CERN, 2019-08-13 - 20 p. - Published in : Eur. Phys. J. C 79 (2019) 675 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
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9.
Study of the $B^0\to \rho(770)^0 K^*(892)^0$ decay with an amplitude analysis of $B^0\to (\pi^+\pi^-) (K^+\pi^-)$ decays / LHCb Collaboration
An amplitude analysis of ${B^0\to (\pi^+\pi^-) (K^+\pi^-)}$ decays is performed in the two-body invariant mass regions ${300 < m(\pi^+\pi^-)<1100}$ MeV/$c^2$, accounting for the $\rho^0$, $\omega$, $f_0(500)$, $f_0(980)$ and $f_0(1370)$ resonances, and ${750 < m(K^+\pi^-)<1200}$ MeV/$c^2$, which is dominated by the $K^{*}(892)^0$ meson. The analysis uses 3 fb$^{-1}$ of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. [...]
arXiv:1812.07008; LHCb-PAPER-2018-042; CERN-EP-2018-316.- Geneva : CERN, 2019-05-06 - 28 p. - Published in : JHEP 05 (2019) 026 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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10.
Search for $CP$ violation through an amplitude analysis of $D^0\rightarrow K^+ K^- \pi^+ \pi^-$ decays / LHCb Collaboration
A search for $CP$ violation in the Cabibbo-suppressed $D^0 \rightarrow K^+ K^- \pi^+ \pi^-$ decay mode is performed using an amplitude analysis. The measurement uses a sample of $pp$ collisions recorded by the LHCb experiment during 2011 and 2012, corresponding to an integrated luminosity of 3.0 fb$^{-1}$. [...]
arXiv:1811.08304; LHCb-PAPER-2018-041; CERN-EP-2018-299.- Geneva : CERN, 2019-02-20 - 33 p. - Published in : JHEP 02 (2019) 126 Additional files: ZIP; Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
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20 Cassina, L
20 Cassina, L.
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