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Allpix$^2$: A Modular Simulation Framework for Silicon Detectors
/ Spannagel, Simon (CERN) ; Wolters, Koen (Eindhoven Technical University (NL)) ; Hynds, Daniel (University of Glasgow (GB)) ; Alipour Tehrani, Niloufar (CERN) ; Benoit, Mathieu (Universite de Geneve (CH)) ; Dannheim, Dominik (CERN) ; Gauvin, Neal (Universite de Geneve (CH)) ; Nurnberg, Andreas Matthias (KIT - Karlsruhe Institute of Technology (DE)) ; Schutze, Paul Jean (Deutsches Elektronen-Synchrotron (DE)) ; Vicente Barreto Pinto, Mateus (Universite de Geneve (CH))
Allpix$^2$ (read: Allpix Squared) is a generic, open-source software framework for the simulation of silicon pixel detectors. Its goal is to ease the implementation of detailed simulations for both single detectors and more complex setups such as beam telescopes from incident radiation to the digitised detector response. [...]
CLICdp-Pub-2018-002; CLICDP-PUB-2018-002; arXiv:1806.05813.-
Geneva : CERN, 2018-09-01 - 9 p.
- Published in : Nucl. Instrum. Methods Phys. Res. A 901 (2018) 164-172
Fulltext: PDF; Fulltext from Publisher: PDF; Version accepted for publication: PDF;
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2.
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The LHCb Silicon Tracker - Control system specific tools and challenges
/ Adeva, G (U. Santiago de Compostela (main)) ; Esperante Pereira, D (U. Santiago de Compostela (main)) ; Gallas, A (U. Santiago de Compostela (main)) ; Pazos Alvarez, A (U. Santiago de Compostela (main)) ; Perez Trigo, E (U. Santiago de Compostela (main)) ; Rodriguez Perez, P (U. Santiago de Compostela (main)) ; Saborido, J (U. Santiago de Compostela (main)) ; Amhis, Y (Ecole Polytechnique, Lausanne) ; Bay, A (Ecole Polytechnique, Lausanne) ; Blanc, F (Ecole Polytechnique, Lausanne) et al.
The Experiment Control System (ECS) of the LHCb Silicon Tracker sub-detectors is built on the integrated LHCb ECS framework. Although all LHCb sub-detectors use the same framework and follow the same guidelines, the Silicon Tracker control system uses some interesting additional features in terms of operation and monitoring. [...]
LHCb-PROC-2013-067; CERN-LHCb-PROC-2013-067.-
Geneva : CERN, 2014
- Published in : J. Phys.: Conf. Ser. 513 (2014) 012032
Fulltext: PDF;
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.012032
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The LHCb Silicon Tracker: Running experience
/ Adeva, G (U. Santiago de Compostela (main)) ; Esperante Pereira, D (U. Santiago de Compostela (main)) ; Gallas, A (U. Santiago de Compostela (main)) ; Pazos Alvarez, A (U. Santiago de Compostela (main)) ; Perez Trigo, E (U. Santiago de Compostela (main)) ; Rodriguez Perez, P (U. Santiago de Compostela (main)) ; Saborido, J (U. Santiago de Compostela (main)) ; Amhis, Y (Ecole Polytechnique, Lausanne) ; Bay, A (Ecole Polytechnique, Lausanne) ; Blanc, F (Ecole Polytechnique, Lausanne) et al.
The LHCb Silicon Tracker is part of the main tracking system of the LHCb detector at the LHC. It measures very precisely the particle trajectories coming from the interaction point in the region of high occupancies around the beam axis. [...]
LHCb-PROC-2012-049; CERN-LHCb-PROC-2012-049.-
Geneva : CERN, 2012 - 8 p.
Fulltext: PDF;
In : Topical Workshop on Electronics for Particle Physics, Oxford, UK, 17 - 21 Sep 2012
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Measurement of the $B^0_s \rightarrow J/\psi \bar{K}^{*0}$ branching fraction and angular amplitudes
/ LHCb collaboration
A sample of 114±11 $B_s^0 → J/ψK^-π^+$ signal events obtained with 0.37 fb$^{-1}$ of pp collisions at √s=7 TeV collected by the LHCb experiment is used to measure the branching fraction and polarization amplitudes of the $B_s^0 → J/ψK̅ ^{*0}$ decay, with $K̅ ^{*0} → K^-π^+$. The $K^-π^+$ mass spectrum of the candidates in the $B_s^0$ peak is dominated by the $K̅ ^{*0}$ contribution. [...]
arXiv:1208.0738; CERN-PH-EP-2012-214; LHCB-PAPER-2012-014; CERN-PH-EP-2012-214; LHCB-PAPER-2012-014.-
2012-10-08 - 16 p.
- Published in : Phys. Rev. D 86 (2012) 071102
APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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6.
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Measurement of the effective $B_s^0 \to K^+ K^-$ lifetime
/ LHCb Collaboration
A precise determination of the effective $B_s^0 \rightarrow K^+ K^-$ lifetime can be used to constrain contributions from physics beyond the Standard Model in the $B_s^0$ meson system. Conventional approaches select $B$ meson decay products that are significantly displaced from the $B$ meson production vertex [...]
arXiv:1207.5993; LHCB-PAPER-2012-013; CERN-PH-EP-2012-172; LHCB-PAPER-2012-013; CERN-PH-EP-2012-172.-
Geneva : CERN, 2012-10-02 - 8 p.
- Published in : Phys. Lett. B 716 (2012) 393-400
Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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7.
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Study of $D_{sJ}$ decays to $D^+K^0_{\rm S}$ and $D^0K^+$ final states in $pp$ collisions
/ LHCb Collaboration
A study of $D^+K_S^0$ and $D^0K^+$ final states is performed in a sample of 1.0 fb$^{-1}$ of $pp$ collision data collected at a centre-of-mass energy of $\sqrt{s}=7$ TeV with the LHCb detector. We confirm the existence of the $D_{s1}^*(2700)^+$ and $D_{sJ}^*(2860)^+$ excited states and measure their masses and widths to be \begin{eqnarray} m(D_{s1}^*(2700)^+) &=& 2709.2 \pm 1.9(\mbox{stat})\pm\,\,\,4.5(\mbox{syst})~{\rm MeV}/c^2,\cr \Gamma(D_{s1}^*(2700)^+) &=& \,\,\,115.8 \pm 7.3(\mbox{stat}) \pm12.1(\mbox{syst})~{\rm MeV}/c^2,\cr m(D_{sJ}^*(2860)^+) &=& 2866.1 \pm 1.0(\mbox{stat}) \pm\,\,\,6.3(\mbox{syst})~{\rm MeV}/c^2,\cr \Gamma(D_{sJ}^*(2860)^+) &=& \,\,\,\,\,\,69.9 \pm 3.2(\mbox{stat}) \pm\,\,\,6.6(\mbox{syst})~{\rm MeV}/c^2.\cr\nonumber \end{eqnarray}
arXiv:1207.6016; CERN-PH-EP-2012-181; LHCB-PAPER-2012-016; CERN-PH-EP-2012-181; LHCB-PAPER-2012-016.-
Geneva : CERN, 2012 - 12 p.
- Published in : JHEP 10 (2012) 151
Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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8.
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Measurement of prompt hadron production ratios in $pp$ collisions at $\sqrt{s} = $ 0.9 and 7 TeV
/ LHCb Collaboration
The charged-particle production ratios $\bar{p}/p$, $K^-/K^+$, $\pi^-/\pi^+$, $(p + \bar{p})/(\pi^+ + \pi^-)$, $(K^+ + K^-)/(\pi^+ + \pi^-)$ and $(p + \bar{p})/(K^+ + K^-)$ are measured with the LHCb detector using $0.3\,{\rm nb^{-1}}$ of $pp$ collisions delivered by the LHC at $\sqrt{s} = 0.9$~TeV and $1.8\,{\rm nb^{-1}}$ at $\sqrt{s} = 7$~TeV. The measurements are performed as a function of transverse momentum $p_{\rm T}$ and pseudorapidity $\eta$. [...]
arXiv:1206.5160; CERN-PH-EP-2012-171; LHCB-PAPER-2011-037; LHCB-PAPER-2011-037; CERN-PH-EP-2012-171.-
Geneva : CERN, 2012-10-05 - 30 p.
- Published in : Eur. Phys. J. C 72 (2012) 2168
Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Rivet analyses reference
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9.
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Measurement of $b$-hadron branching fractions for two-body decays into charmless charged hadrons
/ LHCb Collaboration
Based on data corresponding to an integrated luminosity of 0.37 fb^-1 collected by the LHCb experiment in 2011, the following ratios of branching fractions are measured: B(B0 -> pi+ pi-) / B(B0 -> K+pi-) = 0.262 +/- 0.009 +/- 0.017, (fs/fd) * B(Bs -> K+K-) / B(B^0 -> K+pi-) = 0.316 +/- 0.009 +/- 0.019, (fs/fd) * B(Bs ->pi+ K-) / B(B0 -> K+pi-) = 0.074 +/- 0.006 +/- 0.006, (fd/fs) * B(B0 -> K+K-) / B(Bs -> K+K-) = 0.018 {+ 0.008 - 0.007} +/- 0.009, (fs/fd) * B(Bs -> pi+pi-) / B(B0 -> pi+pi-) = 0.050 {+ 0.011 - 0.009} +/- 0.004, B(Lambda_b -> p pi-) / B(Lambda_b -> p K-) = 0.86 +/- 0.08 +/- 0.05, where the first uncertainties are statistical and the second systematic. Using the current world average of B(B0 -> K+pi-) and the ratio of the strange to light neutral B meson production fs/fd measured by LHCb, we obtain: B(B0 -> pi+pi-) = (5.08 +/- 0.17 +/- 0.37) x 10^-6, B(Bs -> K+K-) = (23.0 +/- 0.7 +/- 2.3) x 10^-6, B(Bs -> pi+K-) = (5.4 +/- 0.4 +/- 0.6) x 10^-6, B(B0 -> K+K-) = (0.11 {+ 0.05 - 0.04} +/- 0.06) x 10^-6, B(Bs -> pi+pi-) = (0.95 {+ 0.21 - 0.17} +/- 0.13) x 10^-6. [...]
arXiv:1206.2794; LHCB-PAPER-2012-002; CERN-PH-EP-2012-161; LHCB-PAPER-2012-002; CERN-PH-EP-2012-161.-
Geneva : CERN, 2012 - 15 p.
- Published in : JHEP 10 (2012) 037
Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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10.
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Observation of excited $\Lambda^0_b$ baryons
/ LHCb Collaboration
Using $pp$ collision data corresponding to 1.0~fb^{-1} integrated luminosity collected by the LHCb detector, two narrow states are observed in the $\Lambda_b^0\pi^+\pi^-$ spectrum with masses $5911.95\pm 0.12(\mbox{stat})\pm 0.03(\mbox{syst})\pm 0.66(\Lambda_b^0\mbox{ mass})$ MeV/$c^2$ and $5919.76\pm 0.07(\mbox{stat})\pm 0.02(\mbox{syst})\pm 0.66(\Lambda_b^0\mbox{ mass})$ MeV/$c^2$. The significances of the observations are 4.9 and 10.1 standard deviations, respectively. [...]
arXiv:1205.3452; CERN-PH-EP-2012-128; LHCB-PAPER-2012-012; LHCB-PAPER-2012-12; LHCB-PAPER-2012-012; CERN-PH-EP-2012-128.-
Geneva : CERN, 2012 - 15 p.
- Published in : Phys. Rev. Lett. 109 (2012) 172003
APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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