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2021-06-18
06:16
High precision particle astrophysics as a new window on the universe with an Antimatter Large Acceptance Detector In Orbit (ALADInO) / Battiston, R (Trento U. ; TIFPA-INFN, Trento) ; Bertucci, B (Perugia U. ; INFN, Perugia) ; Adriani, O (Florence U. ; INFN, Florence) ; Ambrosi, G (INFN, Perugia) ; Baoudoy, B (IRFU, Saclay) ; Blasi, P (GSSI, Aquila) ; Boezio, M (INFN, Trieste) ; Campana, D (INFN, Naples) ; Derome, L (LPSC, Grenoble) ; De Mitri, I (GSSI, Aquila) et al.
Multimessenger astrophysics is based on the detection, with the highest possible accuracy, of the cosmic radiation. During the last 20 years, the advent space-borne magnetic spectrometers in space (AMS-01, Pamela, AMS-02), able to measure the charged cosmic radiation separating matter from antimatter, and to provide accurate measurement of the rarest components of Cosmic Rays (CRs) to the highest possible energies, have become possible, together with the ultra-precise measurement of ordinary CRs. [...]
2021 - 32 p. - Published in : 10.1007/s10686-021-09708-w Fulltext: PDF;

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2021-06-18
06:16
First demonstration of the use of crab cavities on hadron beams / Calaga, R (CERN) ; Alekou, A (Manchester U.) ; Antoniou, F (CERN) ; Appleby, R B (Manchester U.) ; Arnaudon, L (CERN) ; Artoos, K (CERN) ; Arduini, G (CERN) ; Baglin, V (CERN) ; Barriere, S (CERN) ; Bartosik, H (CERN) et al.
Many future particle colliders require beam crabbing to recover geometric luminosity loss from the nonzero crossing angle at the interaction point (IP). A first demonstration experiment of crabbing with hadron beams was successfully carried out with high energy protons. [...]
2021 - 6 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 062001 Fulltext: PDF;

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2021-06-18
06:16
Off-momentum cleaning simulations and measurements at the Large Hadron Collider / Garcia Morales, Hector (Royal Holloway, U. of London ; CERN) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN) ; Salvachua, Belen (CERN) ; Wretborn, Joel (CERN) ; Sjobak, Kyrre Ness (CERN ; Oslo U.)
The Large Hadron Collider is designed to collide proton beams with unprecedented energy in order to extend the frontiers of high-energy physics. Particles that have an energy different from the nominal one follow dispersive orbits and, if the energy offset is large enough, could be lost on the cold aperture and cause quenches of superconducting magnets. [...]
2021 - 14 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1010 (2021) 165494

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2021-06-18
06:16
Preparation and Execution of the Electrical Quality Assurance Program On the LHC Superconducting Circuits During the Second Long Shutdown / Ludwin, Jaromir (CERN) ; Bednarek, Mateusz (CERN) ; Bednarski, Mikolaj (CERN ; Cracow, INP) ; Bielewski, Jaroslaw (CERN ; Cracow, INP) ; Bogdali, Pawel (CERN ; Cracow, INP) ; D'Angelo, Giorgio (CERN) ; Daniluk, Witold (CERN ; Cracow, INP) ; Dutkiewicz, Erazm Maria (CERN ; Cracow, INP) ; Grzadziel, Dominik (CERN ; Cracow, INP) ; Janik, Grzegorz (CERN ; Cracow, INP) et al.
The electrical quality assurance (ELQA) of the superconducting circuits of CERN’s Large Hadron Collider (LHC) during its second Long Shutdown (LS2) requires the execution of vast measurement campaigns. Each of 1658 electrical circuits as well as the instrumentation of each of the 1746 individual cryo-assemblies housing magnets, bus-bars and other components of the superconducting circuits, has to undergo a series of tests. [...]
2021 - 4 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4002404 Fulltext: PDF;

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2021-06-18
06:16
Scalable Declarative HEP Analysis Workflows for Containerised Compute Clouds / Šimko, Tibor (CERN) ; Heinrich, Lukas Alexander (CERN) ; Lange, Clemens (CERN) ; Lintuluoto, Adelina Eleonora (CERN ; Helsinki U.) ; MacDonell, Danika Marina (Victoria U.) ; Mečionis, Audrius (CERN) ; Rodríguez Rodríguez, Diego (CERN) ; Shandilya, Parth (CERN ; LNM Inst. Info. Tech.) ; Vidal García, Marco (CERN)
We describe a novel approach for experimental High-Energy Physics (HEP) data analyses that is centred around the declarative rather than imperative paradigm when describing analysis computational tasks. The analysis process can be structured in the form of a Directed Acyclic Graph (DAG), where each graph vertex represents a unit of computation with its inputs and outputs, and the graph edges describe the interconnection of various computational steps. [...]
2021 - 12 p. - Published in : 10.3389/fdata.2021.661501 Fulltext: PDF;

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2021-06-18
06:16
Study of the χ$_{c1}$(3872) State in Decays of Beauty Hadrons in the LHCb Experiment / Pereima, D Yu (Kurchatov Inst., Moscow) ; Egorychev, V Yu (Kurchatov Inst., Moscow) ; Belyaev, I M (Kurchatov Inst., Moscow)
The first observation of the $\Lambda _{b}^{0}$ → χ$_{c1}$(3872)pK$^{–}$ decay and the results of precision measurements of χ$_{c1}$(3872) state parameters in the B$^{+}$ → χ$_{c1}$(3872)K$^{+}$ decays are presented. Relative branching fractions of $\Lambda _{b}^{0}$ → χ$_{c1}$(3872)pK$^{–}$ and $\Lambda _{b}^{0}$ → ψ(2S)pK$^{–}$ decays, as well as B$^{+}$ → χ$_{c1}$(3872)K$^{+}$ and B$^{+}$ → ψ(2S)K$^{+}$ are measured. [...]
2021 - 4 p. - Published in : Bull. Lebedev Phys. Inst.: 48 (2021) , no. 4, pp. 123-126
- Published in : Kratk Soobshch. Fiz.: 48 (2021) , no. 4, pp. 42-47

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2021-06-18
06:16
Design and Description of the CMS Magnetic System Model / Klyukhin, Vyacheslav (SINP, Moscow ; CERN)
This review describes the composition of the Compact Muon Solenoid (CMS) detector and the methodology for modelling the heterogeneous CMS magnetic system, starting with the formulation of the magnetostatics problem for modelling the magnetic flux of the CMS superconducting solenoid enclosed in a steel flux-return yoke. The review includes a section on the magnetization curves of various types of steel used in the CMS magnet yoke. [...]
2021 - 18 p. - Published in : Symmetry 13 (2021) 1052 Fulltext: PDF;

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2021-06-18
06:16
Analysis-Specific Fast Simulation at the LHC with Deep Learning / Chen, C (Peking U., SKLNPT) ; Cerri, O (Caltech) ; Nguyen, T Q (Caltech) ; Vlimant, J R (Caltech) ; Pierini, M (CERN)
We present a fast-simulation application based on a deep neural network, designed to create large analysis-specific datasets. Taking as an example the generation of W + jet events produced in $\sqrt{s}=$ 13 TeV proton–proton collisions, we train a neural network to model detector resolution effects as a transfer function acting on an analysis-specific set of relevant features, computed at generation level, i.e., in absence of detector effects. [...]
2021 - 17 p. - Published in : Comput. Softw. Big Sci. 5 (2021) 15 Fulltext: PDF;

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2021-06-18
06:16
Research and development of the back-end electronics for the two-dimensional improved resistive plate chambers in CMS upgrade / CMS Collaboration
To complement and ensure redundancy in the endcap muon system of the Compact Muon Solenoid (CMS) detector and to extend the Resistive Plate Chamber (RPC) system coverage, improved RPCs (iRPCs) with either orthogonal layer strips with one-end electronics or single layer strips with two-end electronics providing more precise time measurement will be installed in the very forward pseudorapidity region of $|\eta |<2.4$. The iRPC readout system needs to support two-dimensional (2D) or two-end readout. [...]
2021 - 11 p. - Published in : Rad. Det. Tech. Meth. 5 (2021) 181-191

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2021-06-18
06:16
Optimized injector schemes for FCC-ee positron production / Bai, B (Beijing, Inst. High Energy Phys. ; IJCLab, Orsay ; Beijing, GUCAS) ; Faus-Golfe, A (IJCLab, Orsay) ; Han, Y (IJCLab, Orsay) ; Chaikovska, I (IJCLab, Orsay) ; Zhou, Z (Beijing, Inst. High Energy Phys.) ; Chi, Y (Beijing, Inst. High Energy Phys.) ; Oide, K (CERN ; KEK, Tsukuba) ; Zimmermann, F (CERN)
Injectors and in particular the positron production systems are a crucial element in linear and circular colliders. The proposed FCC-ee injector linac accelerates both electrons and positrons up to 6 GeV in order to be injected into the Pre-Booster Ring (PBR) with a high intensity of 3.5 nC per bunch for the Z running mode. [...]
2021 - 14 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1009 (2021) 165463

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