CERN Accelerating science

LHCb Notes

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2019-09-04
10:59
Upgrade trigger selection studies / Alfonso Albero, Alejandro (University of Barcelona (ES)) ; Batozskaya, Varvara (National Centre for Nuclear Research (PL)) ; Benson, Sean (Nikhef National institute for subatomic physics (NL)) ; Bjorn, Mikkel (University of Oxford (GB)) ; Blusk, Steven R. (Syracuse University (US)) ; Chobanova, Veronika Georgieva (Universidade de Santiago de Compostela (ES)) ; Ciezarek, Gregory Max (CERN) ; Dziurda, Agnieszka (Polish Academy of Sciences (PL)) ; Fitzpatrick, Conor (CERN) ; Govorkova, Katya (Nikhef National institute for subatomic physics (NL)) et al.
This document describes the selection strategies for the upgrade trigger using a range of decay channels that are representative of the current, and planned, physics programme. The upgrade high-level trigger (HLT) follows the Run 2 trigger structure consisting of two stages, in between which the detector calibration and alignment is performed. [...]
LHCb-PUB-2019-013; CERN-LHCb-PUB-2019-013.- Geneva : CERN, 2019 - mult.p. Fulltext: PDF;

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2019-08-29
10:30
LHCb Computing Resources: 2021 requests / Bozzi, Concezio (Universita e INFN, Ferrara (IT))
This document presents the computing resources needed by LHCb in 2021, the first year of data-taking with the upgraded LHCb detector. The computing requests are based on the Computing Model Technical Design Report for the LHCb Upgrade, with minor adjustments due to the update of the LHC running conditions..
LHCb-PUB-2019-012; CERN-LHCb-PUB-2019-012.- Geneva : CERN, 2019 - 13. Fulltext: PDF;

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2019-08-23
12:04
DIPOLE-b: direct probe of short-lived particle electromagnetic dipole moments at LHCb / Henry, Louis (Univ. of Valencia and CSIC (ES)) ; Marangotto, Daniele (Università degli Studi e INFN Milano (IT)) ; Martinez Vidal, Fernando (Univ. of Valencia and CSIC (ES)) ; Merli, Andrea (Università degli Studi e INFN Milano (IT)) ; Neri, Nicola (Università degli Studi e INFN Milano (IT)) ; Robbe, Patrick (Centre National de la Recherche Scientifique (FR)) ; Ruiz Vidal, Joan (Univ. of Valencia and CSIC (ES))
Magnetic and electric dipole moments of fundamental particles are powerful probes for physics within and beyond the Standard Model. However, these have not been experimentally accessible to date for the case of short-lived particles due to the difficulties imposed by their short lifetimes. [...]
LHCb-PUB-2019-011; CERN-LHCb-PUB-2019-011.- Geneva : CERN, 2019 - mult.p.

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2019-07-29
14:35
Search for the decay $B_s^0 \to D^{\ast +} D^{\ast -}$ / Langer, Jan (Technische Universitaet Dortmund (DE)) ; Ibis, Philipp (Technische Universitaet Dortmund (DE)) ; Modden, Antje (Technische Universitaet Dortmund (DE))
A search for the decay $B_s^0 \to D^{\ast +} D^{\ast -}$ and the measurement of its branching ratio $\mathcal{BR}(B_s^0 \to D^{\ast +} D^{\ast -})$ relative to $\mathcal{BR}(B^0 \to D^{\ast +} D^{\ast -})$ is presented. The search is performed on data corresponding to 9\,$\text{fb}^{-1}$ of $pp$ collisions recorded by the LHCb experiment at a centre of mass energy of 7, 8\,TeV in 2011 to 2012 and 13\,TeV in 2015 to 2018 [...]
LHCb-PUB-2019-010; CERN-LHCb-PUB-2019-010.- Geneva : CERN, 2019 - mult.p.

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2019-07-24
18:04
First beam test of UT sensors with the SALT 3.0 readout ASIC / Artuso, Marina (Syracuse University (US)) ; Blusk, Steven R. (Syracuse University (US)) ; Ely, Scott Edward (Syracuse University (US)) ; Rudolph, Matthew Scott (Syracuse University (US)) ; Stone, Sheldon (Syracuse University (US)) ; Wang, Jianchun (Chinese Academy of Sciences (CN)) ; Wilkinson, Michael (Syracuse University (US)) ; Kim, Kyung Eun (Syracuse University (US)) ; Li, Zhuoming (Syracuse University (US))
This note presents the results of a beam test conducted at the Fermilab test beam facility in March 2019. The beam test represents the first such test of the UT readout ASIC, SALT 3.0, in a beam with production UT sensors. [...]
LHCb-PUB-2019-009; CERN-LHCb-PUB-2019-009.- Geneva : CERN, 2019 - mult.p. Fulltext: PDF;

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2019-07-24
11:30
Velo Upgrade Module Nomenclature / Coco, Victor (European Organization for Nuclear Research (CERN), Geneva, Switzerland) ; Akiba, Kazu (Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands) ; Back, John (Department of Physics, University of Warwick, Coventry, United Kingdom) ; Bertella, Claudia (European Organization for Nuclear Research (CERN), Geneva, Switzerland) ; Bitadze, Alexander (School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom) ; Boente García, Oscar (Instituto Galego de Física de Altás (IGFAE), Universidade de Santiago de Compostela,Santiago de Compostela, Spain) ; Bogdanova, Galina (Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia) ; Borghi, Silvia (School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom) ; Bowcock, Themis (Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom) ; Bridges, Kieran (Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom) et al.
The nomenclature and geometry of the various constituents of velo upgrade hybrid sensors are defined, as well as their position within the modules. The modules nomenclature and their position along the z-axis are defined..
LHCb-PUB-2019-008; CERN-LHCb-PUB-2019-008.- Geneva : CERN, 2019 - 14. Fulltext: PDF;

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2019-05-07
15:20
Simulation of the light yield attenuation maps for the LHCb SciFi Tracker Upgrade / Beranek, Sarah ; Bieker, Martin Stefan (Technische Universitaet Dortmund (DE)) ; Demmer, Moritz ; Ekelhof, Robert Jan ; Gerber, Christopher Ole ; Whitehead, Mark Peter (Rheinisch Westfaelische Tech. Hoch. (DE)) ; Wishahi, Julian Tarek (Technische Universitaet Dortmund (DE))
The Scintillating Fibre (SciFi) Tracker will replace the Inner and Outer Tracker in the LHCb upgrade, to be installed in 2019-2020. It is made from thin scintillating fibres read out by multichannel Silicon Photomultipliers (SiPM). [...]
LHCb-PUB-2019-007; CERN-LHCb-PUB-2019-007.- Geneva : CERN, 2019 - 24. Fulltext: PDF;

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2019-04-16
15:48
Description of Light Guidance in Dual Clad Scintillating Fibres for the LHCb SciFi Tracker / Bieker, Martin Stefan (Technische Universitaet Dortmund (DE)) ; Ekelhof, Robert Jan ; Manderfeld, Robin
During the LHCb upgrade in 2019/2020, a new detector element will be installed that uses scintillating fibres (SciFi) to detect particle tracks, the so-called SciFi Tracker. To predict its performance, a single fibre simulation has previously been developed with the Geant4 toolkit. [...]
LHCb-PUB-2019-006; CERN-LHCb-PUB-2019-006.- Geneva : CERN, 2019 - 24. Fulltext: PDF;

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2019-03-21
17:31
New muon identification operators / Anderlini, Lucio (Universita e INFN, Firenze (IT)) ; Archilli, Flavio (INFN e Laboratori Nazionali di Frascati (IT)) ; Cardini, Alessandro (Universita e INFN, Cagliari (IT)) ; Cogoni, Violetta (Universita e INFN, Cagliari (IT)) ; Fontana, Marianna (CERN) ; Graziani, Giacomo (Universita e INFN, Firenze (IT)) ; Kazeev, Nikita (Yandex School of Data Analysis (RU)) ; Kuindersma, Hilbrand Steffen (University of Groningen (NL)) ; Oldeman, Rolf (Universita e INFN, Cagliari (IT)) ; Palutan, Matteo (INFN e Laboratori Nazionali di Frascati (IT)) et al.
in preparation
LHCb-PUB-2019-005; CERN-LHCb-PUB-2019-005.- Geneva : CERN, 2019 - mult.p.

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2019-02-11
10:28
LHCb Computing Resource usage in 2018 / Bozzi, Concezio (Universita e INFN, Ferrara (IT))
This document reports the usage of computing resources by the LHCb collaboration during the period January 1st – December 31st 2018. The data in the following sections have been compiled from the EGI Accounting portal: https://accounting.egi.eu [...]
LHCb-PUB-2019-004; CERN-LHCb-PUB-2019-004.- Geneva : CERN, 2019 - 39. Fulltext: PDF;

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