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LHCb Notes

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2016-06-29
14:35
Sensitivity of LHCb and its upgrade in the measurement of $BR(K_S^0\rightarrow\pi^0\mu\mu)$ / 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 $BR(K_S^0\rightarrow\pi^0\mu\mu)$ is analyzed in light of the Run-I data and the oportunities of the full software trigger of the LHCb upgrade. 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

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2016-06-24
10:22
Prospects for the rare strange decays $K^0_{\rm S} \to \pi^+\pi^-e^+e^-$, $K^0_{\rm S} \to \pi^0\mu^+\mu^-$ and $K^+ \to \pi^+\mu^+\mu^-$ with LHCb run II data / Marin Benito, Carla (University of Barcelona (ES)) ; Lucio Martinez, Miriam (Universidade de Santiago de Compostela (ES)) ; Zarebski, Kristian Alexander (University of Birmingham (GB)) ; Garrido Beltran, Lluis (University of Barcelona (ES)) ; Cid Vidal, Xabier (Universidade de Santiago de Compostela (ES)) ; Chobanova, Veronika Georgieva (Universidade de Santiago de Compostela (ES)) ; Martinez Santos, Diego (Universidade de Santiago de Compostela (ES)) ; Lazzeroni, Cristina (University of Birmingham (GB)) ; Sergi, Antonino (University of Birmingham (GB))
pending
LHCb-PUB-2016-016; CERN-LHCb-PUB-2016-016.- Geneva : CERN, 2016

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2016-06-07
16:46
LHCb Upgraded RICH 2 Engineering Design Review Report / Garsed, Philip John (University of Cambridge (GB)) ; Wotton, Stephen (University of Cambridge (GB)) ; Cardinale, Roberta (Universita e INFN Genova (IT)) ; Petrolini, Alessandro (Universita e INFN Genova (IT)) ; Benettoni, Massimo (Universita e INFN, Padova (IT)) ; Simi, Gabriele (Universita e INFN, Padova (IT)) ; Zago, M (University of Padova and INFN, Padova, Italy) ; Easo, Sajan (STFC - Rutherford Appleton Lab. (GB)) ; D'Ambrosio, Carmelo (CERN) ; Frei, Christoph (CERN) et al.
During the Long Shutdown 2 of the LHC, the LHCb experiment and, specifically, its two Ring Imaging Cherenkov (RICH) detectors will undergo a major upgrade. RICH 2 will be refurbished with new photon detectors and their associated electronics, with the capability of up to 40 MHz sustained acquisition rate. [...]
LHCb-PUB-2016-015; CERN-LHCb-PUB-2016-015.- Geneva : CERN, 2016 - mult.p.

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2016-06-07
16:34
LHCb Upgraded RICH 1 Engineering Design Review Report / Adinolfi, Marco (University of Bristol (GB)) ; Kariuki, James Mwangi (University of Bristol (GB)) ; Petridis, Konstantinos (University of Bristol (GB)) ; Rademacker, Jonas (University of Bristol (GB)) ; Garsed, Philip John (University of Cambridge (GB)) ; Wotton, Stephen (University of Cambridge (GB)) ; Cardinale, Roberta (Universita e INFN Genova (IT)) ; Petrolini, Alessandro (Universita e INFN Genova (IT)) ; Clark, David Edward (Imperial College Sci., Tech. & Med. (GB)) ; Egede, Ulrik (Imperial College Sci., Tech. & Med. (GB)) et al.
During the Long Shutdown 2 of the LHC, the LHCb collaboration will replace the upstream Ring Imaging Cherenkov detector (RICH 1). The magnetic shield of the current RICH 1 will be modified, new spherical and plane mirrors will be installed and a new gas enclosure will be manufactured. [...]
LHCb-PUB-2016-014; CERN-LHCb-PUB-2016-014.- Geneva : CERN, 2016 - mult.p.

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2016-04-22
09:55
LHCb Scintillating Fibre Tracker Engineering Design Review: PACIFIC Readout ASIC / Joram, Christian (CERN) ; Uwer, Ulrich (Ruprecht-Karls-Universitaet Heidelberg (DE))
pending
LHCb-PUB-2016-013; CERN-LHCb-PUB-2016-013.- Geneva : CERN, 2016

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2016-04-22
09:36
LHCb Scintillating Fibre Tracker Engineering Design Review: Frontend Electronics / Joram, Christian (CERN) ; Uwer, Ulrich (Ruprecht-Karls-Universitaet Heidelberg (DE))
pending
LHCb-PUB-2016-012; CERN-LHCb-PUB-2016-012.- Geneva : CERN, 2016 - 119. Fulltext: PDF;

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2016-04-13
17:09
LHCb Physics Motivations for the 2016 Heavy-ion LHC run / Graziani, Giacomo (Universita e INFN, Firenze (IT)) ; Massacrier, Laure Marie (Laboratoire de l'Accelerateur Lineaire (FR)) ; Robbe, Patrick (Laboratoire de l'Accelerateur Lineaire (FR)) ; Schmelling, Michael (Max-Planck-Gesellschaft (DE)) ; Schmidt, Burkhard (CERN)
This document summarizes the arguments to support the request by the LHCb experiment to record an integrated luminosity of 20nb$^-1$ of $p$Pb and Pb$p$ collisions during the LHC heavy ion run of 2016 at a centre-of-mass energy of $\sqrt{s_{\rm NN}}=8$ TeV..
LHCb-PUB-2016-011; CERN-LHCb-PUB-2016-011.- Geneva : CERN, 2016 - 9. Fulltext: PDF;

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2016-04-08
10:07
Shrinking of bumps by drawing scintillating fibres through a hot conical tool / Rodrigues Cavalcante, Ana Barbara (CBPF - Brazilian Center for Physics Research (BR)) ; Garnier, Francois (CERN) ; Gavardi, Laura (Technische Universitaet Dortmund (DE)) ; Joram, Christian (CERN) ; Kristic, Robert (CERN) ; Pierschel, Gerhard (Rheinisch-Westfaelische Tech. Hoch. (DE)) ; Schneider, Thomas (CERN)
The LHCb SciFi tracker will be based on scintillating fibres with a nominal diameter of 250 $\mu$m. A small length fraction of these fibres shows millimetre-scale fluctuations of the diameter, also known as bumps and necks. [...]
LHCb-PUB-2016-010; CERN-LHCb-PUB-2016-010.- Geneva : CERN, 2016 - 12. Fulltext: PDF;

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2016-04-01
14:14
Quality of scintillating fibres after hot bump shrinking / Rodrigues Cavalcante, Ana Barbara (CBPF - Brazilian Center for Physics Research (BR)) ; Gavardi, Laura (Technische Universitaet Dortmund (DE)) ; Joram, Christian (CERN)
Shrinking the diameter of fibre bumps by a hot drawing tool requires to run the fibre through the hot tool over its full length, bearing the risk of a degradation of the fibre performance. In this study we demonstrated that the hot bump shrinking method has no visible effect on the optical attenuation length, the light yield following ionising radiation, the diameter, the mechanical stability and the integrity of the cladding. [...]
LHCb-PUB-2016-009; CERN-LHCb-PUB-2016-009.- Geneva : CERN, 2016 Fulltext: PDF;

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2016-03-08
12:03
Study of prototype sensors for the Upstream Tracker Upgrade / Abba, Andrea (Nuclear Instruments srl, IT-22045 Lumbrugo (CO), Italy) ; Artuso, Marina (Syracuse U. (main)) ; Blusk, Steven R. (Syracuse U. (main)) ; Bursche, Albert (Zurich U.) ; Davis, Adam (Cincinnati U.) ; Dendek, Adam Mateusz (AGH-UST, Cracow) ; Dey, Biplab (Università degli Studi e INFN Milano (IT)) ; Ely, Scott Edward (Syracuse U. (main)) ; Forshaw, Dean Charles (Syracuse U. (main)) ; Fu, Jinlin (Milan U.) et al.
Three testbeams were carried out in 2015 to test the performance of prototype sensors for the Upstream Tracker. Two of the testbeams were devoted to studying full size n-in-p sensors, and one was devoted to testing mini-sensors, all from Hamamatsu. [...]
LHCb-PUB-2016-007; CERN-LHCb-PUB-2016-007.- Geneva : CERN, 2016 - 100. Fulltext: PDF;

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