@article{654ef63c2313486c95c367fb2ec97b03,
title = "Precision luminosity measurements at LHCb",
abstract = "Measuring cross-sections at the LHC requires the luminosity to be determined accurately at each centre-of-mass energy s. In this paper results are reported from the luminosity calibrations carried out at the LHC interaction point 8 with the LHCb detector for s = 2.76, 7 and 8 TeV (proton-proton collisions) and for sNN = 5 TeV (proton-lead collisions). Both the {"}van der Meer scan{"} and {"}beam-gas imaging{"} luminosity calibration methods were employed. It is observed that the beam density profile cannot always be described by a function that is factorizable in the two transverse coordinates. The introduction of a two-dimensional description of the beams improves significantly the consistency of the results. For proton-proton interactions at s = 8 TeV a relative precision of the luminosity calibration of 1.47\% is obtained using van der Meer scans and 1.43\% using beam-gas imaging, resulting in a combined precision of 1.12\%. Applying the calibration to the full data set determines the luminosity with a precision of 1.16\%. This represents the most precise luminosity measurement achieved so far at a bunched-beam hadron collider.",
keywords = "Instrumentation for particle accelerators and storage rings - high energy (linear accelerators synchrotrons), Pattern recognition cluster finding calibration and fitting methods",
author = "R. Aaij and B. Adeva and M. Adinolfi and A. Affolder and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and Cartelle, \{P. Alvarez\} and Alves, \{Jr A.\} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and J. Anderson and R. Andreassen and M. Andreotti and Andrews, \{J. E.\} and Appleby, \{R. B.\} and Gutierrez, \{O. Aquines\} and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and Back, \{J. J.\} and A. Badalov and C. Baesso and W. Baldini and Barlow, \{R. J.\} and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and V. Battista and A. Bay and L. Beaucourt and J. Beddow and F. Bedeschi and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and G. Bencivenni and S. Benson and J. Benton and A. Berezhnoy and R. Bernet and Bettler, \{M. O.\} and \{Van Beuzekom\}, M. and A. Bien and S. Bifani and T. Bird and A. Bizzeti and Bj{\o}rnstad, \{P. M.\} and T. Blake and F. Blanc and J. Blouw and S. Blusk and V. Bocci and A. Bondar and N. Bondar and W. Bonivento and S. Borghi and A. Borgia and M. Borsato and Bowcock, \{T. J.V.\} and E. Bowen and C. Bozzi and T. Brambach and J. Bressieux and D. Brett and M. Britsch and T. Britton and J. Brodzicka and Brook, \{N. H.\} and H. Brown and A. Bursche and J. Buytaert and S. Cadeddu and R. Calabrese and M. Calvi and Gomez, \{M. Calvo\} and P. Campana and Perez, \{D. Campora\} and A. Carbone and G. Carboni and R. Cardinale and A. Cardini and L. Carson and Akiba, \{K. Carvalho\} and G. Casse and L. Cassina and Garcia, \{L. Castillo\} and M. Cattaneo and Ch Cauet and R. Cenci and M. Charles and Ph Charpentier and M. Chefdeville and S. Chen and Cheung, \{S. F.\} and N. Chiapolini and M. Chrzaszcz and K. Ciba and \{Cid Vidal\}, X. and G. Ciezarek and Clarke, \{P. E.L.\} and M. Clemencic and Cliff, \{H. V.\} and J. Closier and V. Coco and J. Cogan and E. Cogneras and L. Cojocariu and G. Collazuol and P. Collins and A. Comerma-Montells and A. Contu and A. Cook and M. Coombes and S. Coquereau and G. Corti and M. Corvo and I. Counts and B. Couturier and Cowan, \{G. A.\} and Craik, \{D. C.\} and \{Cruz Torres\}, M. and S. Cunliffe and R. Currie and C. D'Ambrosio and J. Dalseno and P. David and David, \{P. N.Y.\} and A. Davis and \{De Bruyn\}, K. and \{De Capua\}, S. and \{De Cian\}, M. and \{De Miranda\}, \{J. M.\} and \{De Paula\}, L. and \{De Silva\}, W. and \{De Simone\}, P. and Dean, \{C. T.\} and D. Decamp and M. Deckenhoff and \{Del Buono\}, L. and N. D{\'e}l{\'e}age and D. Derkach and O. Deschamps and F. Dettori and \{Di Canto\}, A. and H. Dijkstra and S. Donleavy and F. Dordei and M. Dorigo and Su{\'a}rez, \{A. Dosil\} and D. Dossett and A. Dovbnya and K. Dreimanis and G. Dujany and F. Dupertuis and P. Durante and R. Dzhelyadin and A. Dziurda and A. Dzyuba and S. Easo and U. Egede and V. Egorychev and S. Eidelman and S. Eisenhardt and U. Eitschberger and R. Ekelhof and L. Eklund and \{El Rifai\}, I. and Ch Elsasser and S. Ely and S. Esen and Evans, \{H. M.\} and T. Evans and A. Falabella and C. F{\"a}rber and C. Farinelli and N. Farley and S. Farry and Fay, \{R. F.\} and D. Ferguson and \{Fernandez Albor\}, V. and \{Ferreira Rodrigues\}, F. and M. Ferro-Luzzi and S. Filippov and M. Fiore and M. Fiorini and M. Firlej and C. Fitzpatrick and T. Fiutowski and P. Fol and M. Fontana and F. Fontanelli and R. Forty and O. Francisco and M. Frank and C. Frei and M. Frosini and J. Fu and E. Furfaro and Torreira, \{A. Gallas\} and D. Galli and S. Gallorini and S. Gambetta and M. Gandelman and P. Gandini and Y. Gao and Pardi{\~n}as, \{J. Garc{\'i}a\} and J. Garofoli and \{Garra Tico\}, J. and L. Garrido and D. Gascon and C. Gaspar and R. Gauld and L. Gavardi and A. Geraci and E. Gersabeck and M. Gersabeck and T. Gershon and Ph Ghez and A. Gianelle and S. Gian{\`i} and V. Gibson and L. Giubega and Gligorov, \{V. V.\} and C. G{\"o}bel and D. Golubkov and A. Golutvin and A. Gomes and C. Gotti and \{Grabalosa G{\'a}ndara\}, M. and \{Graciani Diaz\}, R. and \{Granado Cardoso\}, \{L. A.\} and E. Graug{\'e}s and G. Graziani and A. Grecu and E. Greening and \{The LHCb Collaboration\}",
year = "2014",
month = dec,
day = "1",
doi = "10.1088/1748-0221/9/12/P12005",
language = "English",
volume = "9",
journal = "Journal of Instrumentation",
issn = "1748-0221",
publisher = "IOP Publishing",
number = "12",
}