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LHCb Miscellaneous

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2014-07-25
09:21
CP Violation in the B sector at the LHC / Wilkinson, G (Oxford U.)
The need for a B physics programme at the LHC to make a thorough study of CP violation is presented. The experimental attributes relevant for B physics of ATLAS, CMS and LHCb are discussed. [...]
LHCb-TALK-1999-028.- Geneva : CERN, 2000 - 8. - Published in : Nucl. Phys. B, Proc. Suppl. 86 (2000) 491-8 Fulltext: PDF;
In : International Euroconference in Quantum Chromodynamics, Montpellier, France, 7 - 13 Jul 1999, pp.491-498

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2013-10-10
11:35
A new readout control system for the LHCb upgrade at CERN / Alessio, Federico (CERN) ; Jacobsson, Richard (CERN)
The LHCb experiment has proposed an upgrade towards a full 40 MHz readout system in order to run between five and ten times its initial design luminosity. The entire readout architecture will be upgraded in order to cope with higher sub-detector occupancies, higher rate and higher network load. [...]
2012 - Published in : JINST 7 (2012) C11010 IOP Open Access article: PDF;
In : Topical Workshop on Electronics for Particle Physics, Oxford, UK, 17 - 21 Sep 2012, pp.C11010

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2013-10-01
04:19
Measurements of B -> DK decays to constrain the CKM Unitarity Triangle angle $\gamma$ and related results at LHCb / Craik, Daniel (Warwick U.)
Constraints on the CKM angle \gamma are presented from GLW, ADS, and GGSZ analyses of B+- -> D K+- at the LHCb experiment. [...]
arXiv:1309.7928 ; DPF2013-45 ; DPF2013-45. - 2013. - 11 p.
Preprint - Full text

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2013-09-24
04:13
Measurements of b hadron lifetimes and effective lifetimes at LHCb / Pal, Bilas (Syracuse U.)
Precision measurements of b-hadron lifetimes are a key goal of the LHCb experiment. [...]
arXiv:1309.5911 ; DPF2013-137 ; DPF2013-137. - 2013. - 8 p.
Preprint - Full text - Fulltext

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2013-07-31
14:23
Optimization of the HLT resource consumption in the LHCb experiment / Frank, M (CERN) ; Gaspar, C (CERN) ; van Herwijnen, E (CERN) ; Jost, B (CERN) ; Neufeld, N (CERN) ; Schwemmer, R (CERN)
Today's computing elements for software based high level trigger processing (HLT) are based on nodes with multiple cores. Using process based parallelization to filter particle collisions from the LHCb experiment on such nodes leads to expensive consumption of memory and hence significant cost increase. [...]
2012 - 8 p.

In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012021

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2013-07-31
14:23
A new data-centre for the LHCb experiment / Brarda, Lo (CERN) ; Jost, Beat (CERN) ; Lacarrere, Daniel (CERN) ; Lindner, Rolf (CERN) ; Neufeld, Niko (CERN) ; Roy, Laurent (CERN) ; Thomas, Eric (CERN)
The upgraded LHCb experiment, which is supposed to go into operation in 2018/19 will require a massive increase in its computer facilities. A new 2 MW data-centre is planned at the LHCb site. [...]
2012 - 6 p.

In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012009

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2013-07-31
14:23
Major changes to the LHCb Grid computing model in year 2 of LHC data / Arrabito, L (CC, Villeurbanne) ; Bernardoff, V (CERN) ; Bouvet, D (CC, Villeurbanne) ; Cattaneo, M (CERN) ; Charpentier, P (CERN) ; Clarke, P (Edinburgh U.) ; Closier, J (CERN) ; Franchini, P (INFN, Ferrara) ; Graciani, R (Barcelona U.) ; Lanciotti, E (CERN) et al.
The increase of luminosity of the LHC in 2011 also introduced an increase of computing requirements for data processing. This paper describes the data processing operations during 2011 prompt reconstruction as well as the end of year re-processing of the full data sample. [...]
2012 - 8 p.

In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.032092

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2013-07-31
14:23
Comparative investigation of shared filesystems for the LHCb Online Cluster / Vijay Kartik, S (CERN) ; Neufeld, Niko (CERN)
This paper describes the investigative study undertaken to evaluate shared filesystem performance and suitability in the LHCb Online environment. Particular focus is given to the measurements and field tests designed and performed on an in-house OpenAFS setup, related comparisons with NFSv4 and GPFS (a clustered filesystem from IBM) are presented. [...]
2012 - 7 p.

In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.042061

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2013-07-29
10:24
LHCb Online Log Analysis and Maintenance System / Garnier, J-C (CERN) ; Brarda, L (CERN) ; Neufeld, N (CERN) ; Nikolaidis, F (CERN)
History has shown, many times computer logs are the only information an administrator may have for an incident, which could be caused either by a malfunction or an attack. Due to the huge amount of logs that are produced from large-scale IT infrastructures, such as LHCb Online, critical information may be overlooked or simply be drowned in a sea of other messages. [...]
2011 - Published in : Conf. Proc.: C111010 (2011) , pp. THCHAUST05 Published version from JaCoW: PDF;
In : 13th International Conference on Accelerator and Large Experimental Physics Control Systems, Grenoble, France, 10 - 14 Oct 2011, pp.1228-1231

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2013-07-29
10:08
LHCb Online Infrastructure Monitoring Tools / Granado Cardoso, L (CERN) ; Gaspar, C (CERN) ; Haen, C (CERN) ; Neufeld, N (CERN) ; Varela, F (CERN) ; Galli, D (Bologna U. ; INFN Bologna)
2011 - Published in : Conf. Proc.: C111010 (2011) , pp. WEBHAUST01 Published version from JaCoW: PDF;
In : 13th International Conference on Accelerator and Large Experimental Physics Control Systems, Grenoble, France, 10 - 14 Oct 2011, pp.618-621

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