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1.
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Extending a 65nm CMOS process design kit for high total ionizing dose effects
/ Nikolaou, Aristeidis (Natl. Tech. U., Athens) ; Bucher, Matthias (Natl. Tech. U., Athens) ; Makris, Nikos (Natl. Tech. U., Athens) ; Papadopoulou, Alexia (Natl. Tech. U., Athens) ; Chevas, Loukas (Natl. Tech. U., Athens) ; Borghello, Giulio (Udine U.) ; Koch, Henri D (U. Mons) ; Kloukinas, Kostas (CERN) ; Poikela, Tuomas S (CERN) ; Faccio, Federico (CERN)
Standard CMOS Process Design Kits (PDKs) do not address degradation the technology incurs when exposed to high Total Ionizing Dose (TID). Front-end electronics for the High-Luminosity Large Hadron Collider are expected to be exposed up to ten-fold doses. [...]
2018 - 4 p.
- Published in : 10.1109/MOCAST.2018.8376561
In : 7th International Conference on Modern Circuits and Systems Technologies, Thessaloniki, Greece, 7 - 9 May 2018
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2.
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Measurement of the shape of the $\Lambda_b^0\to\Lambda_c^+ \mu^- \overline{\nu}_{\mu}$ differential decay rate
/ LHCb Collaboration
A measurement of the shape of the differential decay rate and the associated Isgur-Wise function for the decay $\Lambda_b^0\to\Lambda_c^+\mu^-\overline{\nu}$ is reported, using data corresponding to $3 fb^{-1}$ collected with the LHCb detector in proton-proton collisions. The $\Lambda_c^+\mu^-\overline{\nu}$(+ anything) final states are reconstructed through the detection of a muon and a $\Lambda_c^+$ baryon decaying into $pK^-\pi^+$, and the decays $\Lambda_b^0\to\Lambda_c^+\pi^+\pi^-\mu^-\overline{\nu}$ are used to determine contributions from $\Lambda_b^0\to \Lambda_c^{\star+}\mu ^-\bar{\nu}$ decays. [...]
arXiv:1709.01920; CERN-EP-2017-164; LHCB-PAPER-2017-016; CERN-PH-EP-2017-164.-
Geneva : CERN, 2017-12-13 - 15 p.
- Published in : Phys. Rev. D 96 (2017) 112005
Fulltext: arXiv:1709.01920 - PDF; 10.1103_PhysRevD.96.112005 - PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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3.
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The VeloPix ASIC
/ Poikela, Tuomas (CERN) ; Ballabriga, R (CERN) ; Buytaert, J (CERN) ; Llopart, X (CERN) ; Wong, W (CERN) ; Campbell, M (CERN) ; Wyllie, K (CERN) ; van Beuzekom, M (NIKHEF, Amsterdam) ; Schipper, J (NIKHEF, Amsterdam) ; Miryala, S (NIKHEF, Amsterdam) et al.
VeloPix, a 130 nm CMOS technology chip with data driven and zero suppressed readout, will be used as a readout chip for the hybrid pixel system of the LHCb Vertex Locator (VELO) upgrade. The upgrade, scheduled for LHC Run-3, will enable the experiment to be read out at 40 MHz in trigger-less mode, with event selection being performed in the CPU farm. [...]
2017 - 8 p.
- Published in : JINST 12 (2017) C01070
In : Topical Workshop on Electronics for Particle Physics, Karlsruhe, Germany, 26 - 30 Sep 2016, pp.C01070
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4.
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Study of prompt D$^0$ meson production in pPb collisions at $\sqrt{s}$=5 TeV
/ LHCb Collaboration
Production of prompt D$^0$ mesons is studied in proton-lead and lead-proton collisions recorded at the LHCb detector at the LHC. The data sample corresponds to an integrated luminosity of $1.58\pm0.02$ nb$^{-1}$ recorded at a nucleon-nucleon centre-of-mass energy of $\sqrt{s}=5$ TeV. [...]
arXiv:1707.02750; LHCB-PAPER-2017-015; LHCb-PAPER-2017-015; CERN-EP-2017-135; LHCB-PAPER-2017-015.-
Geneva : CERN, 2017-10-12 - 27 p.
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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5.
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Updated branching fraction measurements of $B^0_{(s)} \to K_{\mathrm{\scriptscriptstyle S}}^0 h^+ h^{\prime -}$ decays
/ LHCb Collaboration
The charmless three-body decays $B^0_{(s)} \to K_{\mathrm{\scriptscriptstyle S}}^0 h^+ h^{\prime -}$ (where $h^{(\prime)} = \pi, K$) are analysed using a sample of $pp$ collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of $3\mbox{fb}^{-1}$. The branching fractions are measured relative to that of the $B^0 \to K_{\mathrm{\scriptscriptstyle S}}^0 \pi^{+} \pi^{-}$ decay, and are determined to be: \begin{eqnarray*} \frac{{\cal B}(B^0\rightarrow K^0_{\rm S}K^{\pm}\pi^{\mp})}{{\cal B}(B^0\rightarrow K^0_{\rm S}\pi^{+}\pi^{-})} = {} & 0.123 \pm 0.009 \; \mathrm{\,(stat)}\; \pm 0.015 \; \mathrm{\,(syst)}\,, \frac{{\cal B}(B^0\rightarrow K^0_{\rm S}K^{+}K^{-})} {{\cal B}(B^0\rightarrow K^0_{\rm S}\pi^{+}\pi^{-})} = {} & 0.549 \pm 0.018 \; \mathrm{\,(stat)}\; \pm 0.033 \; \mathrm{\,(syst)}\,, \frac{{\cal B}(B_{s}^0\rightarrow K^0_{\rm S}\pi^{+}\pi^{-})}{{\cal B}(B^0\rightarrow K^0_{\rm S}\pi^{+}\pi^{-})} = {} & 0.191 \pm 0.027 \; \mathrm{\,(stat)}\; \pm 0.031 \; \mathrm{\,(syst)}\; \pm 0.011 \; (f_s/f_d) \,, \frac{{\cal B}(B_{s}^0\rightarrow K^0_{\rm S}K^{\pm}\pi^{\mp})} {{\cal B}(B^0\rightarrow K^0_{\rm S}\pi^{+}\pi^{-})} = {} & 1.70\phantom{0} \pm 0.07\phantom{0} \; \mathrm{\,(stat)} \; \pm 0.11\phantom{0} \; \mathrm{\,(syst)}\; \pm 0.10\phantom{0} \; (f_s/f_d) \,, \frac{{\cal B}(B_{s}^0\rightarrow K^0_{\rm S}K^{+}K^{-})}{{\cal B}(B^0\rightarrow K^0_{\rm S}\pi^{+}\pi^{-})} \in {} & [0.008 - 0.051] \rm ~at~90\%~confidence~level, \end{eqnarray*} where $f_s/f_d$ represents the ratio of hadronisation fractions of the $B^0_s$ and $B^0$ mesons..
arXiv:1707.01665; LHCB-PAPER-2017-010; CERN-EP-2017-131.-
2017-11-08 - 42 p.
- Published in : JHEP 11 (2017) 027
Article from SCOAP3: PDF; Figures: ZIP; Fulltext: PDF; External link: Figures, tables and other information
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6.
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Improved limit on the branching fraction of the rare decay $K^0_{\scriptscriptstyle S}\to\mu^+\mu^-$
/ LHCb Collaboration
A search for the decay $K^0_{\scriptscriptstyle S}\to\mu^+\mu^-$ is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3 fb$^{-1}$, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yield is consistent with the background-only hypothesis, yielding a limit on the branching fraction of ${\cal B}(K^0_{\scriptscriptstyle S}\to\mu^+\mu^-) < 0.8~(1.0) \times 10^{-9}$ at $90\%~(95\%)$ confidence level. [...]
arXiv:1706.00758; CERN-EP-2017-101; LHCB-PAPER-2017-009; LHCB-PAPER-2017-009.-
Geneva : CERN, 2017-10-13 - 20 p.
- Published in : Eur. Phys. J. C 77 (2017) 678
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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7.
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Updated search for long-lived particles decaying to jet pairs
/ LHCb Collaboration
A search is presented for long-lived particles with a mass between 25 and 50 GeV/$c^2$ and a lifetime between 2 and 500 ps, using proton-proton collision data corresponding to an integrated luminosity of 2.0 fb$^{-1}$, collected by the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The particles are assumed to be pair-produced in the decay of a 125 GeV/$c^2$ Standard-Model-like Higgs boson. [...]
arXiv:1705.07332; LHCB-PAPER-2016-065; CERN-EP-2017-083.-
Geneva : CERN, 2017-11-29 - 23 p.
- Published in : Eur. Phys. J. C
Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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8.
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Measurement of $B^{0}_{s}$ and $D^{-}_{s}$ meson lifetimes
/ LHCb Collaboration
We report on a measurement of the flavor-specific $B^{0}_{s}$ lifetime and of the $D^{-}_{s}$ lifetime using proton-proton collisions at center-of-mass energies of 7 and 8 TeV, collected by the LHCb experiment and corresponding to 3.0 fb$^{-1}$ of integrated luminosity. Approximately 407 000 $B^{0}_{s} \rightarrow D^{(*)-}_{s} \mu^{+}\nu_\mu $ decays are partially reconstructed in the $K^{+}K^{-}\pi^{-}\mu^{+}$ final state. [...]
arXiv:1705.03475; CERN-EP-2017-070; LHCB-PAPER-2017-004.-
Geneva : CERN, 2017-09-08 - 10 p.
- Published in : Phys. Rev. Lett. 119 (2017) 101801
Fulltext: 1705.03475 - PDF; arXiv:1705.03475 - PDF; 10.1103_PhysRevLett.119.101801 - PDF; Related data file(s): ZIP; Supplementary material: PDF; Supplementary material (zip): ZIP; External link: Figures, tables and other information
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