Measurement of the track reconstruction efficiency at LHCb

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10 Blusk, S; 60 Bocci Valerio 25 Bondar, A; 35 Bondar N, 34; 30,; 39 Bonivento Walter 15,; 39 Borghi, S; 55 Borgia, A; 60 Borsato, M; 7 Bowcock TJV,; 53 Bowen, E; 41 Bozzi Concezio 16 Brambach, T; van den Brand, J; 43 Bressieux J, 42; 40 Brett, D; 55 Britsch, M; 10 Britton, T; 60 Brodzicka, J; 55 Brook NH,; 47 Brown, H; 53 Bursche, A; 41 Busetto Giovanni 22, 84 Buytaert J; 39 Cadeddu Sandro 15 Calabrese Roberto 16,; 73 Calvi Marta 20,; 78 Gomez MC,; 37,; 82 Campana Pierluigi 18,; 39 Perez DC,; Carbone Angelo 14,; 71 Carboni Giovanni 24,; 79 Cardinale Roberta 19,; 39,; 77 Cardini Alessandro 15 Carson, L; 51 Akiba KC,; 2 Casse G,; 53 Cassina Lorenzo 20 Garcia LC,; 39 Cattaneo, M; 39 Cauet, C; Cenci Riccardo 59 Charles, M; 8 Charpentier P,; 39 Chen, S; 55 Cheung SF,; 56 Chiapolini, N; 41 Chrzaszcz, M; 41 Ciba K, 26; 39 Vidal XC,; 39 Ciezarek, G; 54 Clarke PEL,; 51 Clemencic, M; 39 Cliff HV,; 48 Closier, J; 39 Coco, V; 39 Cogan, J; 6 Cogneras E,; 5 Collins P,; 39 Comerma Montells, A; 11 Contu Andrea 15 Cook, A; 47 Coombes, M; 47 Coquereau, S; 8 Corti G,; 39 Corvo Marco 16, 73 Counts I; 57 Couturier, B; 39 Cowan GA,; 51 Craik DC,; 49 Torres MC,; 61 Cunliffe, S; 54 Currie, R; 51 D'Ambrosio, C; 39 Dalseno, J; 47 David, P; 8 David PNY,; 42 Davis, A; 58 De Bruyn, K; 42 De Capua, S; 55 De Cian, M; 11 De Miranda JM,; 1 De Paula L,; 2 De Silva W,; 58 De Simone Patrizia 18 Decamp, D; 4 Deckenhoff M,; 9 Del Buono L,; 8 Deleage N,; 4 Derkach D,; 56 Deschamps, O; 5 Dettori F,; 39 Di Canto, A; 39 Dijkstra, H; 39 Donleavy, S; 53 Dordei, F; 11 Dorigo, M; 40 Suarez AD,; 38 Dossett, D; 49 Dovbnya, A; 44 Dreimanis, K; 53 Dujany, G; 55 Dupertuis, F; 40 Durante, P; 39 Dzhelyadin, R; 36 Dziurda, A; 26 Dzyuba, A; 30 Easo, S; 50 Egede U, 39; 54 Egorychev, V; 31 Eidelman, S; 35 Eisenhardt S, 34; 51 Eitschberger, U; 9 Ekelhof R,; 9 Eklund L,; 52 El Rifai, I; 5 Elsasser C,; 41 Ely, S; 60 Esen, S; 11 Evans HM,; 48 Evans, T; 56 Falabella, A; Farber, C; Farinelli, C; 42 Farley, N; 46 Farry, S; 53 Fay RF,; 53 Ferguson, D; 51 Albor VF,; 38 Rodrigues FF,; 1 Ferro Luzzi M,; 39 Filippov, S; 33 Fiore Marco 16,; 73 Fiorini Massimiliano 16,; 73 Firlej, M; 27 Fitzpatrick, C; 40 Fiutowski, T; 27 Fontana, M; 10 Fontanelli Flavio 19, 77 Forty R; 39 Francisco, O; 2 Frank M,; 39 Frei, C; 39 Frosini Maddalena 17,; 39,; 74 Fu Jinlin 21,; 39 Furfaro Emiliano 24,; 79 Torreira AG,; 38 Galli Domenico 14,; 71 Gallorini Stefano 22 Gambetta Silvia 19,; 77 Gandelman, M; 2 Gandini P,; 60 Gao, Y; 3 Pardinas JG,; 38 Garofoli, J; 60 Tico JG,; 48 Garrido, L; 37 Gaspar, C; 39 Gauld, R; 56 Gavardi, L; 9 Gavrilov G,; 30 Gersabeck, E; 11 Gersabeck, M; 55 Gershon, T; 49 Ghez, P; 4 Gianelle Alessio 22 Giani S,; 40 Gibson, V; 48 Giubega, L; 29 Gligorov VV,; 39 Gobel, C; Golubkov, D; 31 Golutvin, A; 39, 31; 54 Gomes, A; 68 Gotti Claudio 20 Gandara MG, 1; 5 Diaz RG,; 37 Cardoso LAG,; 39 Grauges, E; 37 Graziani Giacomo 17 Grecu, A; 29 Greening, E; 56 Gregson, S; 48 Griffith, P; 46 Grillo, L; 11 Grunberg, O; 63 Gui, B; 60 Gushchin, E; 33 Guz, Y; 39 Gys T, 36; 39 Hadjivasiliou, C; 60 Haefeli, G; 40 Haen, C; 39 Haines SC,; 48 Hall, S; 54 Hamilton, B; 59 Hampson, T; 47 Han, X; 11 Hansmann Menzemer, S; 11 Harnew, N; 56 Harnew ST,; 47 Harrison, J; 55 He, J; 39 Head, T; 39 Heijne, V; 42 Hennessy, K; 53 Henrard, P; 5 Henry L,; 8 Morata JAH,; 38 van Herwijnen, E; 39 Hess, M; 63 Hicheur, A; 1 Hill D,; 56 Hoballah, M; 5 Hombach C,; 55 Hulsbergen, W; 42 Hunt, P; 56 Hussain, N; 56 Hutchcroft, D; 53 Hynds, D; 52 Idzik, M; 27 Ilten, P; 57 Jacobsson, R; 39 Jaeger, A; 11 Jalocha, J; 56 Jans, E; 42 Jaton, P; 40 Jawahery, A; 59 Jing, F; 3 John M,; 56 Johnson, D; 56 Jones CR,; 48 Joram, C; 39 Jost, B; 39 Jurik, N; 60 Kaballo, M; 9 Kandybei S,; 44 Kanso, W; 6 Karacson M,; 39 Karbach TM,; 39 Karodia, S; 52 Kelsey, M; 60 Kenyon IR,; 46 Ketel, T; 43 Khanji Basem 20 Khurewathanakul C, 42; 40 Klaver, S; 55 Klimaszewski, K; 28 Kochebina, O; 7 Kolpin M,; 11 Komarov, I; 40 Koopman RF,; 43 Koppenburg P, 42; 42 Korolev M, 39; 32 Kozlinskiy, A; 42 Kravchuk, L; 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29 Goicochea JMO,; 2 Owen P,; 54 Oyanguren, A; 65 Pal BK,; 60 Palano Antimo 13,; 70 Palombo Fernando 21,; 87 Palutan Matteo 18 Panman, J; 39 Papanestis, A; 50 Pappagallo M, 39; 52 Pappalardo Luciano Libero 16, 73 Parkes C; 55 Parkinson CJ,; 46 Passaleva Giovanni 17 Patel GD, 9; 53 Patel, M; 54 Patrignani Claudia 19, 77 Alvarez AP; 38 Pearce, A; 55 Pellegrino, A; 42 Altarelli MP,; 39 Perazzini Stefano 14, 71 Trigo EP; 38 Perret, P; 5 Perrin Terrin M,; 6 Pescatore L,; 46 Pesen, E; 67 Petridis, K; 54 Petrolini Alessandro 19, 77 Olloqui EP; 37 Pietrzyk, B; 4 Pilar T,; 49 Pinci Davide 25 Pistone Alessandro 19 Playfer, S; 51 Casasus MP,; 38 Polci, F; 8 Poluektov A,; 35, 34; 49 Polycarpo, E; 2 Popov A,; 36 Popov, D; 10 Popovici, B; 29 Potterat, C; 2 Price E,; 47 Prisciandaro, J; 40 Pritchard, A; 53 Prouve, C; 47 Pugatch, V; 45 Navarro AP,; 40 Punzi Giovanni 23, 85 Qian W; 4 Rachwal B,; 26 Rademacker JH,; 47 Rakotomiaramanana, B; 40 Rama Matteo 18 Rangel MS,; 2 Raniuk I,; 44 Rauschmayr, N; 39 Raven, G; 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53 Shekhtman, L; 35 Shevchenko V, 34; 64 Shires, A; 9 Coutinho RS,; 49 Simi Gabriele 22 Sirendi, M; 48 Skidmore, N; 47 Skwarnicki, T; 60 Smith NA,; 53 Smith, E; 54, 50; E50, 56*Smith; 54,; 56 Smith, J; 48 Smith, M; 55 Snoek, H; 42 Sokoloff MD,; 58 Soler FJP,; 52 Soomro, F; 40 Souza, D; 47 De Paula BS,; 2 Spaan B,; 9 Sparkes A,; 51 Spradlin, P; 52 Sridharan, S; 39 Stagni, F; 39 Stahl, M; 11 Stahl, S; 11 Steinkamp, O; 41 Stenyakin, O; 36 Stevenson, S; 56 Stoica, S; 29 Stone, S; 60 Storaci, B; 41 Stracka Simone 23, 39 Straticiuc M; 29 Straumann, U; 41 Stroili Roberto 22 Subbiah VK,; 39 Sun, L; 58 Sutcliffe, W; 54 Swientek, K; 27 Swientek, S; 9 Syropoulos V,; 43 Szczekowski M, 42; 28 Szczypka, P; 40 Szilard D, 39; 2 Szumlak T,; 27 T'Jampens, S; 4 Teklishyn M,; 7 Tellarini Giulia 16, 73 Teubert F; 39 Thomas, C; 56 Thomas, E; 39 van Tilburg, J; 42 Tisserand, V; 4 Tobin M,; 40 Tolk, S; 42,; 43 Tomassetti Luca 16,; 73 Tonelli Diego 39 Topp Joergensen, S; 56 Torr, N; 56 Tournefier, E; 4 Tourneur S,; 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doi:10.1088/1748-0221/10/02/P02007

The determination of track reconstruction efficiencies at LHCb using J/psi -> mu(+)mu(-) decays is presented. Efficiencies above 95% are found for the data taking periods in 2010, 2011, and 2012. The ratio of the track reconstruction efficiency of muons in data and simulation is compatible with unity and measured with an uncertainty of 0.8% for data taking in 2010, and at a precision of 0.4% for data taking in 2011 and 2012. For hadrons an additional 1.4% uncertainty due to material interactions is assumed. This result is crucial for accurate cross section and branching fraction measurements in LHCb.