CERN Accelerating science

LHCb Notes

Synergy of BESIII and LHCb physics programmes / Malde, Sneha Sirirshkumar (University of Oxford (GB))
There is potential for BESIII open-charm measurements to have a significant impact on the LHCb physics programme. Despite the general purpose design of the LHCb detector there are certain inputs that can be better determined in other environments or in production mechanisms not accessible at the LHC. [...]
LHCb-PUB-2016-025; CERN-LHCb-PUB-2016-025.- Geneva : CERN, 2016 - 12. Fulltext: PDF;

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Work Project Report: Benchmark for 100 Gbps Ethernet network analysis / Moutidis, Iraklis
During the Long Shutdown 2 (2018-2019) the LHCb experiment will be upgraded in order to reach extremely high precision on the main observable of the b and c-quarks sectors. In its current state the LHCb experiment has a readout rate of 1.1 MHz within a fixed latency, which causes the collision rate to be limited [...]
LHCb-PUB-2016-024; CERN-LHCb-PUB-2016-024.- Geneva : CERN, 2016 - 8. Fulltext: PDF;

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LHCb Computing Resource usage in January — July 2016 / Bozzi, Concezio (Universita di Ferrara & INFN (IT))
This documents reports the usage of computing resources by the LHCb collaboration during the period January 1st – July 31st 2016..
LHCb-PUB-2016-023; CERN-LHCb-PUB-2016-023.- Geneva : CERN, 2016 - 36. Fulltext: PDF;

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LHCb Computing Resources: reassessment of 2017 requests and preview of 2018 and 2019 requests / Bozzi, Concezio (Universita di Ferrara & INFN (IT))
This document presents a reassessment of computing resources needed by LHCb in 2017 and a preview of computing requests for 2018 and 2019, as resulting from the current experience of Run2 data taking and recent changes in the LHCb computing model parameters..
LHCb-PUB-2016-022; CERN-LHCb-PUB-2016-022.- Geneva : CERN, 2016 - 15. Fulltext: PDF;

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The PIDCalib package / Anderlini, Lucio (Universita e INFN, Firenze (IT)) ; Contu, Andrea (CERN) ; Jones, Christopher Rob (University of Cambridge (GB)) ; Malde, Sneha Sirirshkumar (University of Oxford (GB)) ; Muller, Dominik (University of Manchester (GB)) ; Ogilvy, Stephen (Istituto Nazionale Fisica Nucleare Frascati (IT)) ; Otalora Goicochea, Juan Martin (Univ. Federal do Rio de Janeiro (BR)) ; Pearce, Alex (University of Manchester (GB)) ; Polyakov, Ivan (Syracuse University (US)) ; Qian, Wenbin (University of Oxford (GB)) et al.
The PIDCalib package is a tool, widely used within the LHCb Collaboration, which provides access to the calibration samples of electrons, muons, pions, kaons and protons. This note covers both theoretical aspects related to the measurement of the efficiency of particle identification requirements, and more technical issues such as the selection of the calibration samples, the background subtraction procedure, and the storage of the data sets in the new data-processing scheme adopted by the LHCb experiment during the second run of the LHC..
LHCb-PUB-2016-021; CERN-LHCb-PUB-2016-021.- Geneva : CERN, 2016 - 22. Fulltext: PDF;

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Computing strategy for PID calibration samples for LHCb Run 2 / Anderlini, Lucio (Universita e INFN, Firenze (IT)) ; Benson, Sean (Nikhef National institute for subatomic physics (NL)) ; Lupton, Olli (University of Oxford (GB)) ; Sciascia, Barbara (Istituto Nazionale Fisica Nucleare Frascati (IT)) ; Gligorov, Vladimir (Lab. Phys. Nucl. Hautes Energies (FR))
The samples for the calibration of the Particle Identification (PID) are sets of data collected by LHCb where decay candidates have a kinematic structure which allows unambiguous identification of one the daughters with a selection strategy not relying on its PID-related variables. PID calibration samples are used in a data-driven technique to measure the efficiency of selection requirements on PID variables in many LHCb analyses. [...]
LHCb-PUB-2016-020; CERN-LHCb-PUB-2016-020.- Geneva : CERN, 2016 Fulltext: PDF;

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Test of the photon detection system for the LHCb RICH Upgrade in a charged particle beam / Baszczyk, Mateusz Karol (Polish Academy of Sciences (PL)) ; Benettoni, Massimo (Universita e INFN, Padova (IT)) ; Calabrese, Roberto (Universita di Ferrara & INFN (IT)) ; Cardinale, Roberta (Universita e INFN Genova (IT)) ; Carniti, Paolo (Universita & INFN, Milano-Bicocca (IT)) ; Cassina, Lorenzo (Universita & INFN, Milano-Bicocca (IT)) ; Cavallero, Giovanni (Universita e INFN Genova (IT)) ; Cojocariu, Lucian Nicolae (IFIN-HH Bucharest (RO)) ; Cotta Ramusino, Angelo (Universita di Ferrara & INFN (IT)) ; D'Ambrosio, Carmelo (CERN) et al.
The LHCb detector will be upgraded to use the available luminosity at the LHC in Run III and extend its potential for discovery. The Ring Imaging Cherenkov (RICH) detectors are one of the key components of the LHCb detector for particle identification. [...]
LHCb-PUB-2016-019; CERN-LHCb-PUB-2016-019.- Geneva : CERN, 2016 - 28. Fulltext: PDF;

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Upgrade of the monitoring system of LHCb ECAL / Guz, Iouri (Institute for High Energy Physics (RU)) ; Belyaev, Vanya (ITEP Institute for Theoretical and Experimental Physics (RU)) ; Chernov, Evgeny (Institute for High Energy Physics (RU)) ; Egorychev, Victor (ITEP Institute for Theoretical and Experimental Physics (RU)) ; Kandybei, Sergii (Nat. Acad. of Sciences of Ukraine (UA)) ; Kvaratskheliya, Tengiz (ITEP Institute for Theoretical and Experimental Physics (RU)) ; Obraztsov, Vladimir (Institute for High Energy Physics (RU)) ; Perret, Pascal (Univ. Blaise Pascal Clermont-Fe. II (FR)) ; Philippov, Sergey (Russian Academy of Sciences (RU)) ; Savrina, Daria (M.V. Lomonosov Moscow State University (RU)) et al.
The LHCb ECAL is a shashlik calorimeter of 6016 cells, covering 7.686.24 m2 area. To monitor the readout chain of each ECAL cell, the LHCb ECAL is equipped with a LED based monitoring system. [...]
LHCb-PUB-2016-018; CERN-LHCb-PUB-2016-018.- Geneva : CERN, 2016 Fulltext: PDF;

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Sensitivity of LHCb and its upgrade in the measurement of $\mathcal B(K_S^0\rightarrow\pi^0\mu^+\mu^-)$ / Chobanova, Veronika Georgieva (Universidade de Santiago de Compostela (ES)) ; Cid Vidal, Xabier (Universidade de Santiago de Compostela (ES)) ; Dalseno, Jeremy Peter (University of Bristol (GB)) ; Lucio Martinez, Miriam (Universidade de Santiago de Compostela (ES)) ; Martinez Santos, Diego (Universidade de Santiago de Compostela (ES)) ; Renaudin, Victor (Laboratoire de l'Accelerateur Lineaire (FR))
The sensitivity of the LHCb experiment to $\mathcal B(K_S^0\rightarrow\pi^0\mu^+\mu^-)$ is analyzed in light of the 2011, 2012 and 2016 data and the oportunities the full software trigger of the LHCb upgrade provides. Two strategies are considered: the full reconstruction of the decay products and the partial reconstruction using only the dilepton pair and kinematic constraints. [...]
LHCb-PUB-2016-017; CERN-LHCb-PUB-2016-017.- Geneva : CERN, 2016 - 12. Fulltext: PDF;

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Feasibility study of $K^0_{\rm S} \to \pi^+\pi^-e^+e^-$ at LHCb / Marin Benito, Carla (University of Barcelona (ES)) ; Garrido Beltran, Lluis (University of Barcelona (ES)) ; Cid Vidal, Xabier (Universidade de Santiago de Compostela (ES))
The feasibility of observing the $K^0_{\rm S} \to \pi^+\pi^-e^+e^-$ decay at LHCb is studied using simulated and real data. During the Run I of the LHC, the yield of events expected per $\text {fb}^{-1}$ of $pp$ collisions at $\sqrt s=8~ \text {TeV}$ is found to be $N _{RunI}(K^0_{\rm S} \to \pi^+\pi^-e^+e^-) = 120^{+280}_ {-100}$. [...]
LHCb-PUB-2016-016; CERN-LHCb-PUB-2016-016.- Geneva : CERN, 2016 - 18. Fulltext: PDF;

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