The International School for Advanced Studies (SISSA) was founded in 1978 and was the first institution in Italy to promote post-graduate courses leading to a Doctor Philosophiae (or PhD) degree. A centre of excellence among Italian and international universities, the school has around 65 teachers, 100 post docs and 245 PhD students, and is located in Trieste, in a campus of more than 10 hectares with wonderful views over the Gulf of Trieste.
SISSA hosts a very high-ranking, large and multidisciplinary scientific research output. The scientific papers produced by its researchers are published in high impact factor, well-known international journals, and in many cases in the world's most prestigious scientific journals such as Nature and Science. Over 900 students have so far started their careers in the field of mathematics, physics and neuroscience research at SISSA.
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The following article is Open access
Curvature-bias corrections using a pseudomass method
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Spiridenkov41, P. Spradlin57, V. Sriskaran46, F. Stagni46, M. Stahl46, S. Stahl46, S. Stanislaus61, E.N. Stein46, O. Steinkamp48, O. Stenyakin41, H. Stevens17, D. Strekalina41, Y. Su7, F. Suljik61, J. Sun29, L. Sun71, Y. Sun64, W. Sutcliffe48, P.N. Swallow51, F. Swystun54, A. Szabelski39, T. Szumlak37, M. Szymanski46, Y. Tan4, S. Taneja60, M.D. Tat61, A. Terentev48, F. Terzuoli102,32, F. Teubert46, E. Thomas46, D.J.D. Thompson51, H. Tilquin59, V. Tisserand11, S. T'Jampens10, M. Tobin5, L. Tomassetti91,23, G. Tonani94,27,46, X. Tong6, D. Torres Machado2, L. Toscano17, D.Y. Tou4, C. Trippl42, G. Tuci19, N. Tuning35, L.H. Uecker19, A. Ukleja37, D.J. Unverzagt19, E. Ursov41, A. Usachov36, A. Ustyuzhanin41, U. Uwer19, V. Vagnoni22, A. Valassi46, G. Valenti22, N. Valls Canudas42, H. Van Hecke65, E. van Herwijnen59, C.B. Van Hulse104,44, R. Van Laak47, M. van Veghel35, R. Vazquez Gomez43, P. Vazquez Regueiro44, C. Vázquez Sierra44, S. Vecchi23, J.J. Velthuis52, M. Veltri103,24, A. 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Yu6, J. Yu68, X. Yuan5, E. Zaffaroni47, M. Zavertyaev18, M. Zdybal38, M. Zeng4, C. Zhang6, D. Zhang8, J. Zhang7, L. Zhang4, S. Zhang68, S. Zhang6, Y. Zhang6, Y.Z. Zhang4, Y. Zhao19, A. Zharkova41, A. Zhelezov19, X.Z. Zheng4, Y. Zheng7, T. Zhou6, X. Zhou8, Y. Zhou7, V. Zhovkovska54, L.Z. Zhu7, X. Zhu4, X. Zhu8, V. Zhukov16,41, J. Zhuo45, Q. Zou5,7, D. Zuliani30, G. Zunica60 and The LHCb collaboration
20 School of Physics, University College Dublin, Dublin, Ireland
21 INFN Sezione di Bari, Bari, Italy
22 INFN Sezione di Bologna, Bologna, Italy
23 INFN Sezione di Ferrara, Ferrara, Italy
24 INFN Sezione di Firenze, Firenze, Italy
25 INFN Laboratori Nazionali di Frascati, Frascati, Italy
26 INFN Sezione di Genova, Genova, Italy
27 INFN Sezione di Milano, Milano, Italy
28 INFN Sezione di Milano-Bicocca, Milano, Italy
29 INFN Sezione di Cagliari, Monserrato, Italy
30 Università degli Studi di Padova, Università e INFN, Padova, Padova, Italy
31 INFN Sezione di Perugia, Perugia, Italy
32 INFN Sezione di Pisa, Pisa, Italy
33 INFN Sezione di Roma La Sapienza, Roma, Italy
34 INFN Sezione di Roma Tor Vergata, Roma, Italy
35 Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands
36 Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands
37 AGH — University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland
38 Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
39 National Center for Nuclear Research (NCBJ), Warsaw, Poland
40 Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
41 Affiliated with an institute covered by a cooperation agreement with CERN
42 DS4DS, La Salle, Universitat Ramon Llull, Barcelona, Spain
43 ICCUB, Universitat de Barcelona, Barcelona, Spain
44 Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
45 Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia — CSIC, Valencia, Spain
46 European Organization for Nuclear Research (CERN), Geneva, Switzerland
47 Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
48 Physik-Institut, Universität Zürich, Zürich, Switzerland
49 NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
50 Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
51 University of Birmingham, Birmingham, United Kingdom
52 H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
53 Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
54 Department of Physics, University of Warwick, Coventry, United Kingdom
55 STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
56 School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
57 School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
58 Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
59 Imperial College London, London, United Kingdom
60 Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
61 Department of Physics, University of Oxford, Oxford, United Kingdom
62 Massachusetts Institute of Technology, Cambridge, MA, United States
63 University of Cincinnati, Cincinnati, OH, United States
64 University of Maryland, College Park, MD, United States
65 Los Alamos National Laboratory (LANL), Los Alamos, NM, United States
66 Syracuse University, Syracuse, NY, United States
67 Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil, associated to 3
68 School of Physics and Electronics, Hunan University, Changsha City, China, associated to 8
69 Guangdong Provincial Key Laboratory of Nuclear Science, Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Institute of Quantum Matter, South China Normal University, Guangzhou, China, associated to 4
70 Lanzhou University, Lanzhou, China, associated to 5
71 School of Physics and Technology, Wuhan University, Wuhan, China, associated to 4
72 Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia, associated to 15
73 Universität Bonn — Helmholtz-Institut für Strahlen und Kernphysik, Bonn, Germany, associated to 19
74 Eotvos Lorand University, Budapest, Hungary, associated to 46
75 Van Swinderen Institute, University of Groningen, Groningen, Netherlands, associated to 35
76 Universiteit Maastricht, Maastricht, Netherlands, associated to 35
77 Tadeusz Kosciuszko Cracow University of Technology, Cracow, Poland, associated to 38
78 Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden, associated to 57
79 University of Michigan, Ann Arbor, MI, United States, associated to 66
80 Departement de Physique Nucleaire (SPhN), Gif-Sur-Yvette, France
Author notes
81 Universidade de Brasília, Brasília, Brazil
82 Centro Federal de Educacão Tecnológica Celso Suckow da Fonseca, Rio De Janeiro, Brazil
83 Hangzhou Institute for Advanced Study, UCAS, Hangzhou, China
84 School of Physics and Electronics, Henan University, Kaifeng, China
85 LIP6, Sorbonne Universite, Paris, France
86 Excellence Cluster ORIGINS, Munich, Germany
87 Universidad Nacional Autónoma de Honduras, Tegucigalpa, Honduras
88 Università di Bari, Bari, Italy
89 Università di Bologna, Bologna, Italy
90 Università di Cagliari, Cagliari, Italy
91 Università di Ferrara, Ferrara, Italy
92 Università di Firenze, Firenze, Italy
93 Università di Genova, Genova, Italy
94 Università degli Studi di Milano, Milano, Italy
95 Università di Milano Bicocca, Milano, Italy
96 Università di Padova, Padova, Italy
97 Università di Perugia, Perugia, Italy
98 Scuola Normale Superiore, Pisa, Italy
99 Università di Pisa, Pisa, Italy
100 Università della Basilicata, Potenza, Italy
101 Università di Roma Tor Vergata, Roma, Italy
102 Università di Siena, Siena, Italy
103 Università di Urbino, Urbino, Italy
104 Universidad de Alcalá, Alcalá de Henares, Spain
105 Universidade da Coruña, Coruña, Spain
106 Department of Physics/Division of Particle Physics, Lund, Sweden
Momentum measurements for very high momentum charged
particles, such as muons from electroweak vector boson decays, are
particularly susceptible to charge-dependent curvature biases that
arise from misalignments of tracking detectors. Low momentum charged
particles used in alignment procedures have limited sensitivity to
coherent displacements of such detectors, and therefore are unable
to fully constrain these misalignments to the precision necessary
for studies of electroweak physics. Additional approaches are
therefore required to understand and correct for these effects. In
this paper the curvature biases present at the LHCb detector are
studied using the pseudomass method in proton-proton collision data
recorded at centre of mass energy √(s)=13 TeV during 2016,
2017 and 2018. The biases are determined using Z→μ+μ-decays in intervals defined by the data-taking period, magnet
polarity and muon direction. Correcting for these biases, which are
typically at the 10-4 GeV-1 level, improves the Z→μ+μ- mass resolution by roughly 18% and eliminates
several pathological trends in the kinematic-dependence of the mean
dimuon invariant mass.
Published by IOP Publishing Ltd on behalf of Sissa Medialab. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.