CERN Accelerating science

CERN Published Articles

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2017-05-24
06:44
B-Hadron Production Asymmetries At LHCb / Ferrari, F (U. Bologna, DIFA ; INFN, Bologna) /LHCb
Using a data sample corresponding to an integrated lumunosity of 1.0 $fb^{−1}$ , collected by LHCb in pp collisions at a centre-of-mass energy of 7 TeV, the $B^0$ and $B^{0}_{s}$ production asymmetries, AP($B^0$) and AP($B^{0}_{s}$), are determined. These quantities are measured by means of an un-tagged time-dependent analysis of B 0 → J/$ψK^{*0}$ , $B^0$ → $D^− π^+$ and $B^{0}_{s}$ → $D^{−}_{s}$ $\pi^+$ decays. [...]
ARISF, 2016 - 4 p. - Published in : (2016) , pp. 565-568 Fulltext: PDF;
In : 51st Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 12 - 19 Mar 2016, pp.565-568

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2017-05-24
06:44
Heavy Flavor Physics from CMS and ATLAS / Swain, Sanjay Kumar (Bhubaneswar, NISER) /CMS ; ATLAS
The study of heavy flavor physics plays an important role in testing Quantum Chromodynamics (QCD) calculations. Here we discuss the production and properties of b and c quarks. [...]
ARISF, 2016 - 8 p. - Published in : (2016) , pp. 81-88 Fulltext: PDF;
In : 51st Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 12 - 19 Mar 2016, pp.81-88

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2017-05-24
06:44
Recent Hot Results (Including Semileptonic B Decays) / Van Tilburg, J (NIKHEF, Amsterdam) /LHCb
The LHCb experiment has collected large samples of heavy flavoured hadrons during Run 1 of the LHC. The conjectured tetraquark state X(5568), observed by D0 in the $B^0_s π^±$ final state, is not confirmed in the LHCb data. [...]
ARISF, 2016 - 8 p. - Published in : (2016) , pp. 73-80 Fulltext: PDF;
In : 51st Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 12 - 19 Mar 2016, pp.73-80

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2017-05-24
06:44
Charm Mixing And CP Violation At LHCb / Pearce, A (Manchester U. ; Rutherford)
LHCb collected the world's largest sample of open charm decays during Run 1 of the Large Hadron Collider. This has permitted many precision measurements of charm mixing and CP violation parameters, the most precise of which is $ΔA_{CP}$ , a measurement of the relative strength of direct, time-integrated CP asymmetries between two singly-Cabibbo suppressed $D^0$ decays. [...]
ARISF, 2016 - 8 p. - Published in : (2016) , pp. 51-58 Fulltext: PDF;
In : 51st Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 12 - 19 Mar 2016, pp.51-58

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2017-05-24
06:44
Highlights of the ISOLDE facility and the HIE-ISOLDE Project / Borge, M J G (CERN ; Madrid, Inst. Estructura Materia)
The ISOLDE Radioactive Beam Facility is the dedicated CERN installation for the production and acceleration of radioactive nuclei far from stability. Exotic nuclei of most chemical elements are available for the study of nuclear structure, nuclear astrophysics, fundamental symmetries and atomic physics, as well as for applications in condensed-matter and life sciences. [...]
2016 - 12 p. - Published in : EPJ Web Conf. 117 (2016) 10002 Fulltext: PDF;
In : 12th International Conference on Nucleus-Nucleus Collisions, Catania, Italy, 21 - 26 Jun 2015, pp.10002

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2017-05-24
06:44
Stellar neutron capture cross sections of K41 and Sc45 / Heil, M (Darmstadt, GSI) ; Plag, R (Darmstadt, GSI) ; Uberseder, E (Notre Dame U.) ; Bisterzo, S (INFN, Turin ; Turin Observ.) ; Käppeler, F (KIT, Karlsruhe) ; Mengoni, A (CERN) ; Pignatari, M (Hull U. ; Konkoly Observ.)
The neutron capture cross sections of light nuclei (A<56) are important for s-process scenarios since they act as neutron poisons. We report on measurements of the neutron capture cross sections of K41 and Sc45, which were performed at the Karlsruhe 3.7 MV Van de Graaff accelerator via the activation method in a quasistellar neutron spectrum corresponding to a thermal energy of kT=25 keV. [...]
2016 - 8 p. - Published in : Phys. Rev. B C 93 (2016) 055807

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2017-05-24
06:44
Geant4 Simulations for the Analysis of (n, $\gamma $ ) Measurements at n_TOF / Lerendegui-Marco, J (Seville U.) ; Guerrero, C (Seville U.) ; Cortés-Giraldo, M A (Seville U.) ; Quesada, J M (Seville U.)
At the n_TOF facility at CERN, the (n, $\gamma $ ) experiments are usually carriedout with a set of C$_{6}$ D$_{6}$ scintillators, a simple setup characterized by a low neutron sensitivity. The drawback of this simple detection setup is an elaborated analysis procedure, the so called Pulse Height Weighting Technique, that requires a manipulation of the experimental detector response. [...]
2016 - 2 p. - Published in : Springer Proc. Phys. 182 (2016) 209-210

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2017-05-24
06:44
Symplectic tracking through straight three dimensional fields by a method of generating functions / Titze, M (CERN ; Humboldt U., Berlin) ; Bahrdt, J (Helmholtz-Zentrum, Berlin) ; Wüstefeld, G (Helmholtz-Zentrum, Berlin)
For simulating single-particle trajectories, the derivation of final coordinates from known initial coordinates through arbitrary electromagnetic fields is of key interest in accelerator physics. We address this task in the case of straight stationary magnetic fields, using generating functions via a perturbative ansatz for the corresponding Hamilton-Jacobi equation. [...]
2016 - 15 p. - Published in : Phys. Rev. Accel. Beams 19 (2016) 014001 Fulltext: PDF;

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2017-05-23
06:09
Fault template extraction to assist operators during industrial alarm floods / Charbonnier, Sylvie (U. Grenoble Alpes) ; Bouchair, Nabil (CERN) ; Gayet, Philippe (CERN)
In industrial systems, a fault occurring on a process can create an alarm flood, a succession of alarms raised at a rate per minute so high it overwhelms the process operator in charge of the monitoring of the process. In this paper, a method to extract fault templates from a set of alarm lists raised on the occurrence of several faults is proposed. [...]
2016 - 13 p. - Published in : Eng. Appl. Artif. Intell. 50 (2016) 32-44

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2017-05-23
06:09
Development of interconnected silicon micro-evaporators for the on-detector electronics cooling of the future ITS detector in the ALICE experiment at LHC / Francescon, Andrea (CERN ; U. Padua (main) ; INFN, Padua) ; Romagnoli, Giulia (CERN) ; Mapelli, Alessandro (CERN) ; Petagna, Paolo (CERN) ; Gargiulo, Corrado (CERN) ; Musa, Luciano (CERN) ; Thome, John R (Ecole Polytechnique, Lausanne) ; Del Col, Davide (U. Padua (main))
The thermal management of the on-detector electronics and the development of low mass integrated cooling systems have become a crucial task in the design of silicon tracking detectors for high energy physics applications. The use of microfabricated ultra-thin silicon cold plates has gained considerable interest in this sense. [...]
2016 - 10 p. - Published in : Appl. Thermal Eng. 93 (2016) 1367-1376

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