Absolute luminosity measurements with the LHCb detector at the LHC

Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the accelerator. Using data taken in 2010, LHCb has applied two methods to determine the absolute scale of its luminosity measurements for proton-proton collisions at the LHC with a centre-of-mass energy of 7 TeV. In addition to the classic "van der Meer scan" method a novel technique has been developed which makes use of direct imaging of the individual beams using beam-gas and beam-beam interactions. This beam imaging method is made possible by the high resolution of the LHCb vertex detector and the close proximity of the detector to the beams, and allows beam parameters such as positions, angles and widths to be determined. The results of the two methods have comparable precision and are in good agreement. Combining the two methods, an overal precision of 3.5% in the absolute luminosity determination is reached. The techniques used to transport the absolute luminosity calibration to the full 2010 data-taking period are presented. RI Coca, Cornelia/B-6015-2012; Galli, Domenico/A-1606-2012; Petrolini, Alessandro/H-3782-2011; Sarti, Alessio/I-2833-2012; manca, giulia/I-9264-2012; de Paula, Leandro/I-9278-2012; Patrignani, Claudia/C-5223-2009; Marconi, Umberto/J-2263-2012; de Simone, Patrizia/J-3549-2012; Cardini, Alessandro/J-5736-2012; Teodorescu, Eliza/K-3044-201

Absolute luminosity measurements with the LHCb detector at the LHC

none573sìAbsolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the accelerator. Using data taken in 2010, LHCb has applied two methods to determine the absolute scale of its luminosity measurements for proton-proton collisions at the LHC with a centre-of-mass energy of 7 TeV. In addition to the classic "van der Meer scan" method a novel technique has been developed which makes use of direct imaging of the individual beams using beam-gas and beam-beam interactions. This beam imaging method is made possible by the high resolution of the LHCb vertex detector and the close proximity of the detector to the beams, and allows beam parameters such as positions, angles and widths to be determined. The results of the two methods have comparable precision and are in good agreement. Combining the two methods, an overal precision of 3.5% in the absolute luminosity determination is reached. The techniques used to transport the absolute luminosity calibration to the full 2010 data-taking period are presented.The LHCb CollaborationnoneAaij R; Adeva B; Adinolfi M; Adrover C; Affolder A; Ajaltouni Z; Albrecht J; Alessio F; Alexander M; Alkhazov G; Cartelle PA; Alves AA; Amato S; Amhis Y; Anderson J; Appleby RB; Gutierrez OA; Archilli Flavio; Arrabito L; Artamonov A; Artuso M; Aslanides E; Auriemma G; Bachmann S; Back JJ; Bailey DS; Balagura V; Baldini Wander; Barlow RJ; Barschel C; Barsuk S; Barter W; Bates A; Bauer C; Bauer T; Bay A; Bediaga I; Belous K; Belyaev I; Ben-Haim E; Benayoun M; Bencivenni Giovanni; Benson S; Benton J; Bernet R; Bettler Marc Olivier; van Beuzekom M; Bien A; Bifani S; Bizzeti Andrea; Bjornstad PM; Blake T; Blanc F; Blanks C; Blouw J; Blusk S; Bobrov A; Bocci V; Bondar A; Bondar N; Bonivento Walter; Borghi S; Borgia A; Bowcock TJV; Bozzi Concezio; Brambach T; van den Brand J; Bressieux J; Brett D; Brisbane S; Britsch M; Britton T; Brook NH; Brown H; Buchler-Germann A; Burducea I; Bursche A; Buytaert J; Cadeddu S; Carvajal JMC; Callot O; Calvi Marta; Gomez MC; Camboni A; Campana Pierluigi; Carbone Angelo; Carboni Giovanni; Cardinale Roberta; Cardini A; Carson L; Akiba KC; Casse G; Cattaneo M; Charles M; Charpentier P; Chiapolini N; Ciba K; Vidal XC; Ciezarek G; Clarke PL; Clemencic M; Cliff HV; Closier J; Coca C; Coco V; Cogan J; Collins P; Constantin F; Conti G; Contu A; Cook A; Coombes M; Corti G; Cowan A; Currie R; D'Almagne B; D'Ambrosio C; David P; De Bonis I; De Capua Stefano; De Cian M; De Lorenzi F; De Miranda JM; De Paula L; De Simone Patrizia; Decamp D; Deckenhoff M; Degaudenzi H; Deissenroth M; Del Buono L; Deplano Caterina; Deschamps O; Dettori Francesco; Dickens J; Dijkstra H; Batista PD; Donleavy S; Dordei F; Suarez AD; Dossett D; Dovbnya A; Dupertuis F; Dzhelyadin R; Eames C; Easo S; Egede U; Egorychev V; Eidelman S; van Eijk D; Eisele F; Eisenhardt S; Ekelhof R; Eklund L; Elsasser C; d'Enterria DG; Pereira DE; Esteve L; Falabella Antonio; Fanchini Erica; Farber C; Fardell G; Farinelli C; Farry S; Fave V; Albor VF; Ferro-Luzzi M; Filippov S; Fitzpatrick C; Fontana M; Fontanelli Flavio; Forty R; Frank M; Frei C; Frosini Maddalena; Furcas Sara; Torreira AG; Galli D; Gandelman M; Gandini P; Gao Y; Garnier JC; Garofoli J; Tico JG; Garrido L; Gaspar C; Gauvin N; Gersabeck M; Gershon T; Ghez P; Gibson V; Gligorov VV; Gobel C; Golubkov D; Golutvin A; Gomes A; Gordon H; Gandara MG; Diaz RG; Cardoso LAG; Grauges E; Graziani G; Grecu A; Gregson S; Gui B; Gushchin E; Guz Y; Gys T; Haefeli G; Haen C; Haines SC; Hampson T; Hansmann-Menzemer S; Harji R; Harnew N; Harrison J; Harrison PF; He J; Heijne V; Hennessy K; Henrard P; Morata JAH; van Herwijnen E; Hicks E; Hofmann W; Holubyev K; Hopchev P; Hulsbergen W; Hunt P; Huse T; Huston RS; Hutchcroft D; Hynds D; Iakovenko V; Ilten P; Imong J; Jacobsson R; Jaeger A; Hussein MJ; Jans E; Jansen F; Jaton P; Jean-Marie B; Jing F; John M; Johnson D; Jones CR; Jost B; Kandybei S; Karacson M; Karbach TM; Keaveney J; Kerzel U; Ketel T; Keune A; Khanji B; Kim YM; Knecht M; Koblitz S; Koppenburg P; Kozlinskiy A; Kravchuk L; Kreplin K; Kreps M; Krocker G; Krokovny P; Kruse F; Kruzelecki K; Kucharczyk Marcin; Kukulak S; Kumar Rajeev; Kvaratskheliya T; La Thi VN; Lacarrere D; Lafferty G; Lai A; Lambert D; Lambert RW; Lanciotti E; Lanfranchi Gaia; Langenbruch C; Latham T; Le Gac R; van Leerdam J; Lees JP; Lefevre R; Leflat A; Lefrancois J; Leroy O; Lesiak T; Li L; Gioi LL; Lieng M; Liles M; Lindner R; Linn C; Liu B; Liu G; Lopes JH; Asamar EL; Lopez-March N; Luisier J; Machefert F; Machikhiliyan IV; Maciuc F; Maev O; Magnin J; Malde S; Mamunur RMD; Manca Giulia; Mancinelli G; Mangiafave N; Marconi U; Marki R; Marks J; Martellotti G; Martens A; Martin L; Sanchez AM; Santos DM; Massafferri A; Matev R; Mathe Z; Matteuzzi Clara; Matveev M; Maurice E; Maynard B; Mazurov Alexander; McGregor G; McNulty R; Mclean Colin David; Meissner M; Merk M; Merkel J; Messi Roberto; Miglioranzi S; Milanes DA; Minard MN; Monteil S; Moran D; Morawski P; Mountain R; Mous I; Muheim F; Muller K; Muresan R; Muryn B; Musy M; Mylroie-Smith J; Naik P; Nakada T; Nandakumar R; Nardulli J; Nasteva I; Nedos M; Needham M; Neufeld N; Nguyen-Mau C; Nicol M; Nies S; Niess V; Nikitin N; Oblakowska-Mucha A; Obraztsov V; Oggero S; Ogilvy S; Okhrimenko O; Oldeman Rudolf; Orlandea M; Goicochea JMO; Owen P; Pal B; Palacios J; Palutan Matteo; Panman J; Papanestis A; Pappagallo Marco Ignazio; Parkes C; Parkinson CJ; Passaleva G; Patel GD; Patel M; Paterson SK; Patrick GN; Patrignani Claudia; Pavel-Nicorescu C; Alvarez AP; Pellegrino A; Penso G; Altarelli MP; Perazzini Stefano; Perego Davide Luigi; Trigo EP; Yzquierdo APC; Perret P; Perrin-Terrin M; Pessina G; Petrella Antonio; Petrolini A; Valls BP; Pietrzyk B; Pilar T; Pinci D; Plackett R; Playfer S; Casasus MP; Polok G; Poluektov A; Polycarpo E; Popov D; Popovici B; Potterat C; Powell A; du Pree T; Prisciandaro J; Pugatch V; Navarro AP; Qian W; Rademacker JH; Rakotomiaramanana B; Rangel MS; Raniuk I; Raven G; Redford S; Reid MM; dos Reis AC; Ricciardi S; Rinnert K; Romero DAR; Robbe P; Rodrigues E; Rodrigues F; Perez PR; Rogers GJ; Roiser S; Romanovsky V; Rouvinet J; Ruf T; Ruiz H; Sabatino G; Silva JJS; Sagidova N; Sail P; Saitta B; Salzmann C; Sannino Mario; Santacesaria R; Rios CS; Santinelli R; Santovetti Emanuele; Sapunov M; Sarti A; Satriano C; Satta Alessia; Savrie M; Savrina D; Schaack P; Schiller M; Schleich S; Schmelling M; Schmidt B; Schneider O; Schopper A; Schune MH; Schwemmer R; Sciubba A; Seco M; Semennikov A; Senderowska K; Sepp I; Serra N; Serrano J; Seyfert P; Shao B; Shapkin M; Shapoval I; Shatalov P; Shcheglov Y; Shears T; Shekhtman L; Shevchenko O; Shevchenko V; Shires A; Coutinho RS; Skottowe HP; Skwarnicki T; Smith AC; Smith NA; Sobczak K; Soler FJP; Solomin A; Soomro F; De Paula BS; Spaan B; Sparkes A; Spradlin P; Stagni F; Stahl S; Steinkamp O; Stoica S; Stone S; Storaci B; Straticiuc M; Straumann U; Styles N; Subbiah VK; Swientek S; Szczekowski M; Szczypka P; Szumlak T; T'Jampens S; Teodorescu E; Teubert F; Thomas C; Thomas E; van Tilburg J; Tisserand V; Tobin M; Topp-Joergensen S; Tran MT; Tsaregorodtsev A; Tuning N; Garcia MU; Ukleja A; Urquijo P; Uwer U; Vagnoni V; Valenti Giovanni; Gomez RV; Regueiro PV; Vecchi Stefania; Velthuis JJ; Veltri Michele; Vervink K; Viaud B; Videau I; Vilasis-Cardona X; Visniakov J; Vollhardt A; Voong D; Vorobyev A; Voss H; Wacker K; Wandernoth S; Wang J; Ward DR; Webber AD; Websdale D; Whitehead M; Wiedner D; Wiggers L; Wilkinson G; Williams MP; Williams M; Wilson FF; Wishahi J; Witek M; Witzeling W; Wotton SA; Wyllie K; Xie Y; Xing F; Yang Z; Young R; Yushchenko O; Zavertyaev M; Zhang F; Zhang L; Zhang WC; Zhang Y; Zhelezov A; Zhong L; Zverev E; Zvyagin AAaij, R; Adeva, B; Adinolfi, M; Adrover, C; Affolder, A; Ajaltouni, Z; Albrecht, J; Alessio, F; Alexander, M; Alkhazov, G; Cartelle, Pa; Alves, Aa; Amato, S; Amhis, Y; Anderson, J; Appleby, Rb; Gutierrez, Oa; Archilli, Flavio; Arrabito, L; Artamonov, A; Artuso, M; Aslanides, E; Auriemma, G; Bachmann, S; Back, Jj; Bailey, Ds; Balagura, V; Baldini, Wander; Barlow, Rj; Barschel, C; Barsuk, S; Barter, W; Bates, A; Bauer, C; Bauer, T; Bay, A; Bediaga, I; Belous, K; Belyaev, I; Ben Haim, E; Benayoun, M; Bencivenni, Giovanni; Benson, S; Benton, J; Bernet, R; Bettler Marc, Olivier; van Beuzekom, M; Bien, A; Bifani, S; Bizzeti, Andrea; Bjornstad, Pm; Blake, T; Blanc, F; Blanks, C; Blouw, J; Blusk, S; Bobrov, A; Bocci, V; Bondar, A; Bondar, N; Bonivento, Walter; Borghi, S; Borgia, A; Bowcock, Tjv; Bozzi, Concezio; Brambach, T; van den Brand, J; Bressieux, J; Brett, D; Brisbane, S; Britsch, M; Britton, T; Brook, Nh; Brown, H; Buchler Germann, A; Burducea, I; Bursche, A; Buytaert, J; Cadeddu, S; Carvajal, Jmc; Callot, O; Calvi, Marta; Gomez, Mc; Camboni, A; Campana, Pierluigi; Carbone, Angelo; Carboni, Giovanni; Cardinale, Roberta; Cardini, A; Carson, L; Akiba, Kc; Casse, G; Cattaneo, M; Charles, M; Charpentier, P; Chiapolini, N; Ciba, K; Vidal, Xc; Ciezarek, G; Clarke, Pl; Clemencic, M; Cliff, Hv; Closier, J; Coca, C; Coco, V; Cogan, J; Collins, P; Constantin, F; Conti, G; Contu, A; Cook, A; Coombes, M; Corti, G; Cowan, A; Currie, R; D'Almagne, B; D'Ambrosio, C; David, P; De Bonis, I; De Capua, Stefano; De Cian, M; De Lorenzi, F; De Miranda, Jm; De Paula, L; De Simone, Patrizia; Decamp, D; Deckenhoff, M; Degaudenzi, H; Deissenroth, M; Del Buono, L; Deplano, Caterina; Deschamps, O; Dettori, Francesco; Dickens, J; Dijkstra, H; Batista, Pd; Donleavy, S; Dordei, F; Suarez, Ad; Dossett, D; Dovbnya, A; Dupertuis, F; Dzhelyadin, R; Eames, C; Easo, S; Egede, U; Egorychev, V; Eidelman, S; van Eijk, D; Eisele, F; Eisenhardt, S; Ekelhof, R; Eklund, L; Elsasser, C; D'Enterria, Dg; Pereira, De; Esteve, L; Falabella, Antonio; Fanchini, Erica; Farber, C; Fardell, G; Farinelli, C; Farry, S; Fave, V; Albor, Vf; Ferro Luzzi, M; Filippov, S; Fitzpatrick, C; Fontana, M; Fontanelli, Flavio; Forty, R; Frank, M; Frei, C; Frosini, Maddalena; Furcas, Sara; Torreira, Ag; Galli, D; Gandelman, M; Gandini, P; Gao, Y; Garnier, Jc; Garofoli, J; Tico, Jg; Garrido, L; Gaspar, C; Gauvin, N; Gersabeck, M; Gershon, T; Ghez, P; Gibson, V; Gligorov, Vv; Gobel, C; Golubkov, D; Golutvin, A; Gomes, A; Gordon, H; Gandara, Mg; Diaz, Rg; Cardoso, Lag; Grauges, E; Graziani, G; Grecu, A; Gregson, S; Gui, B; Gushchin, E; Guz, Y; Gys, T; Haefeli, G; Haen, C; Haines, Sc; Hampson, T; Hansmann Menzemer, S; Harji, R; Harnew, N; Harrison, J; Harrison, Pf; He, J; Heijne, V; Hennessy, K; Henrard, P; Morata, Jah; van Herwijnen, E; Hicks, E; Hofmann, W; Holubyev, K; Hopchev, P; Hulsbergen, W; Hunt, P; Huse, T; Huston, Rs; Hutchcroft, D; Hynds, D; Iakovenko, V; Ilten, P; Imong, J; Jacobsson, R; Jaeger, A; Hussein, Mj; Jans, E; Jansen, F; Jaton, P; Jean Marie, B; Jing, F; John, M; Johnson, D; Jones, Cr; Jost, B; Kandybei, S; Karacson, M; Karbach, Tm; Keaveney, J; Kerzel, U; Ketel, T; Keune, A; Khanji, B; Kim, Ym; Knecht, M; Koblitz, S; Koppenburg, P; Kozlinskiy, A; Kravchuk, L; Kreplin, K; Kreps, M; Krocker, G; Krokovny, P; Kruse, F; Kruzelecki, K; Kucharczyk, Marcin; Kukulak, S; Kumar, Rajeev; Kvaratskheliya, T; La Thi, Vn; Lacarrere, D; Lafferty, G; Lai, A; Lambert, D; Lambert, Rw; Lanciotti, E; Lanfranchi, Gaia; Langenbruch, C; Latham, T; Le Gac, R; van Leerdam, J; Lees, Jp; Lefevre, R; Leflat, A; Lefrancois, J; Leroy, O; Lesiak, T; Li, L; Gioi, Ll; Lieng, M; Liles, M; Lindner, R; Linn, C; Liu, B; Liu, G; Lopes, Jh; Asamar, El; Lopez March, N; Luisier, J; Machefert, F; Machikhiliyan, Iv; Maciuc, F; Maev, O; Magnin, J; Malde, S; Mamunur, Rmd; Manca, Giulia; Mancinelli, G; Mangiafave, N; Marconi, U; Marki, R; Marks, J; Martellotti, G; Martens, A; Martin, L; Sanchez, Am; Santos, Dm; Massafferri, A; Matev, R; Mathe, Z; Matteuzzi, Clara; Matveev, M; Maurice, E; Maynard, B; Mazurov, Alexander; Mcgregor, G; Mcnulty, R; Mclean Colin, David; Meissner, M; Merk, M; Merkel, J; Messi, Roberto; Miglioranzi, S; Milanes, Da; Minard, Mn; Monteil, S; Moran, D; Morawski, P; Mountain, R; Mous, I; Muheim, F; Muller, K; Muresan, R; Muryn, B; Musy, M; Mylroie Smith, J; Naik, P; Nakada, T; Nandakumar, R; Nardulli, J; Nasteva, I; Nedos, M; Needham, M; Neufeld, N; Nguyen Mau, C; Nicol, M; Nies, S; Niess, V; Nikitin, N; Oblakowska Mucha, A; Obraztsov, V; Oggero, S; Ogilvy, S; Okhrimenko, O; Oldeman, Rudolf; Orlandea, M; Goicochea, Jmo; Owen, P; Pal, B; Palacios, J; Palutan, Matteo; Panman, J; Papanestis, A; Pappagallo Marco, Ignazio; Parkes, C; Parkinson, Cj; Passaleva, G; Patel, Gd; Patel, M; Paterson, Sk; Patrick, Gn; Patrignani, Claudia; Pavel Nicorescu, C; Alvarez, Ap; Pellegrino, A; Penso, G; Altarelli, Mp; Perazzini, Stefano; Perego Davide, Luigi; Trigo, Ep; Yzquierdo, Apc; Perret, P; Perrin Terrin, M; Pessina, G; Petrella, Antonio; Petrolini, A; Valls, Bp; Pietrzyk, B; Pilar, T; Pinci, D; Plackett, R; Playfer, S; Casasus, Mp; Polok, G; Poluektov, A; Polycarpo, E; Popov, D; Popovici, B; Potterat, C; Powell, A; du Pree, T; Prisciandaro, J; Pugatch, V; 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Stagni, F; Stahl, S; Steinkamp, O; Stoica, S; Stone, S; Storaci, B; Straticiuc, M; Straumann, U; Styles, N; Subbiah, Vk; Swientek, S; Szczekowski, M; Szczypka, P; Szumlak, T; T'Jampens, S; Teodorescu, E; Teubert, F; Thomas, C; Thomas, E; van Tilburg, J; Tisserand, V; Tobin, M; Topp Joergensen, S; Tran, Mt; Tsaregorodtsev, A; Tuning, N; Garcia, Mu; Ukleja, A; Urquijo, P; Uwer, U; Vagnoni, V; Valenti, Giovanni; Gomez, Rv; Regueiro, Pv; Vecchi, Stefania; Velthuis, Jj; Veltri, Michele; Vervink, K; Viaud, B; Videau, I; Vilasis Cardona, X; Visniakov, J; Vollhardt, A; Voong, D; Vorobyev, A; Voss, H; Wacker, K; Wandernoth, S; Wang, J; Ward, Dr; Webber, Ad; Websdale, D; Whitehead, M; Wiedner, D; Wiggers, L; Wilkinson, G; Williams, Mp; Williams, M; Wilson, Ff; Wishahi, J; Witek, M; Witzeling, W; Wotton, Sa; Wyllie, K; Xie, Y; Xing, F; Yang, Z; Young, R; Yushchenko, O; Zavertyaev, M; Zhang, F; Zhang, L; Zhang, Wc; Zhang, Y; Zhelezov, A; Zhong, L; Zverev, E; Zvyagin, A