Measurement of the forward $Z$ boson production cross-section in $pp$ collisions at $\sqrt{s}=7$ TeV

Bernardo Adeva, Marco Adinolfi, Anthony Affolder, Ziad Ajaltouni, Simon Akar, Johannes Albrecht, Federico Alessio, Michael Alexander, Suvayu Ali, Georgy Alkhazov, Paula Alvarez Cartelle, Antonio Au Alves Jr, Sandra Amato, Silvia Amerio, Yasmine Amhis, Liupan An, Lucio Anderlini, Jonathan Anderson, Mirco Andreotti, Jason AndrewsRobert Appleby, Osvaldo Aquines Gutierrez, Flavio Archilli, Philippe d'Argent, Alexander Artamonov, Marina Artuso, Elie Aslanides, Giulio Auriemma, Marouen Baalouch, Sebastian Bachmann, John Back, Alexey Badalov, Clarissa Baesso, Wander Baldini, Roger Barlow, Colin Barschel, Sergey Barsuk, William Barter, Varvara Batozskaya, Vincenzo Battista, Aurelio Bay, Leo Beaucourt, John Beddow, Franco Bedeschi, Ignacio Bediaga, Lennaert Bel, Ivan Belyaev, Eli Ben-Haim, Giovanni Bencivenni, Sean Benson, Jack Benton, Alexander Berezhnoy, Roland Bernet, Alessandro Bertolin, Marc-Olivi Bettler, Martinus van Beuzekom, Alexander Bien, Simone Bifani, Thomas Bird, Alex Birnkraut, Andrea Bizzeti, Thomas Blake, Frédéric Blanc, Johan Blouw, Steven Blusk, Valerio Bocci, Alexander Bondar, Nikolay Bondar, Walter Bonivento, Silvia Borghi, Alessandra Borgia, Martino Borsato, Themistocl Bowcock, Espen Eie Bowen, Concezio Bozzi, David Brett, Markward Britsch, Thomas Britton, Jolanta Brodzicka, Nicholas Brook, Albert Bursche, Jan Buytaert, Sandro Cadeddu, Roberto Calabrese, Marta Calvi, Miriam Calvo Gomez, Pierluigi Campana, Daniel Campora Perez, Lorenzo Capriotti, Angelo Carbone, Giovanni Carboni, Roberta Cardinale, Alessandro Cardini, Paolo Carniti, Laurence Carson, Kazuyoshi Carvalho Akiba, Raimon Casanova Mohr, Gianluigi Casse, Lorenzo Cassina, Lucia Castillo Garcia, Marco Cattaneo, Christophe Cauet, Giovanni Cavallero, Riccardo Cenci, Matthew Charles, Philippe Charpentier, Maximilien Chefdeville, Shanzhen Chen, Shu-Faye Cheung, Nicola Chiapolini, Marcin Chrzaszcz, Xabier Cid Vidal, Gregory Ciezarek, Peter Clarke, Marco Clemencic, Harry Cliff, Joel Closier, Victor Coco, Julien Cogan, Eric Cogneras, Violetta Cogoni, Lucian Cojocariu, Gianmaria Collazuol, Paula Collins, Albert Comerma-Montells, Andrea Contu, Andrew Cook, Matthew Coombes, Samuel Coquereau, Gloria Corti, Marco Corvo, Ian Counts, Benjamin Couturier, Greig Cowan, Daniel Cha Craik, Andrew Crocombe, Melissa Ma Cruz Torres, Samuel Cunliffe, Robert Currie, Carmelo D'Ambrosio, Jeremy Dalseno, Pieter David, Adam Davis, Kristof De Bruyn, Stefano De Capua, Michel De Cian, Jussara De Miranda, Leandro De Paula, Weeraddana De Silva, Patrizia De Simone, Cameron Th Dean, Daniel Decamp, Mirko Deckenhoff, Luigi Del Buono, Nicolas Déléage, Denis Derkach, Olivier Deschamps, Francesco Dettori, Biplab Dey, Angelo Di Canto, Francesco Di Ruscio, Hans Dijkstra, Stephanie Donleavy, Francesca Dordei, Mirco Dorigo, Alvaro Dosil Suárez, David Dossett, Anatoliy Dovbnya, Karlis Dreimanis, Giulio Dujany, Frederic Dupertuis, Paolo Durante, Rustem Dzhelyadin, Agnieszka Dziurda, Alexey Dzyuba, Sajan Easo, Ulrik Egede, Victor Egorychev, Semen Eidelman, Stephan Eisenhardt, Ulrich Eitschberger, Robert Ekelhof, Lars Eklund, Ibrahim El Rifai, Christian Elsasser, Scott Ely, Sevda Esen, Hannah Mar Evans, Timothy Evans, Antonio Falabella, Christian Färber, Chiara Farinelli, Nathanael Farley, Stephen Farry, Robert Fay, Dianne Ferguson, Victor Fernandez Albor, Fabio Ferrari, Fernando Ferreira Rodrigues, Massimilia Ferro-Luzzi, Sergey Filippov, Marco Fiore, Massimilia Fiorini, Miroslaw Firlej, Conor Fitzpatrick, Tomasz Fiutowski, Philip Fol, Marianna Fontana, Flavio Fontanelli, Roger Forty, Oscar Francisco, Markus Frank, Christoph Frei, Maddalena Frosini, Jinlin Fu, Emiliano Furfaro, Abraham Gallas Torreira, Domenico Galli, Stefano Gallorini, Silvia Gambetta, Miriam Gandelman, Paolo Gandini, Yuanning Gao, Julián García Pardiñas, Justin Garofoli, Jordi Garra Tico, Lluis Garrido, David Gascon, Clara Gaspar, Ugo Gastaldi, Rhorry Gauld, Laura Gavardi, Giulio Gazzoni, Angelo Geraci, David Gerick, Evelina Gersabeck, Marco Gersabeck, Timothy Gershon, Philippe Ghez, Alessio Gianelle, Sebastiana Gianì, Valerie Gibson, Lavinia-He Giubega, V V Gligorov, Carla Göbel, Dmitry Golubkov, Andrey Golutvin, Alvaro Gomes, Claudio Gotti, Marc Grabalosa Gándara, Ricardo Graciani Diaz, Luis Alber Granado Cardoso, Eugeni Graugés, Elena Graverini, Giacomo Graziani, Alexandru Grecu, Edward Greening, Sam Gregson, Peter Griffith, Lucia Grillo, Oliver Grünberg, Bin Gui, Evgeny Gushchin, Yury Guz, Thierry Gys, Christos Hadjivasiliou, Guido Haefeli, Christophe Haen, Susan Haines, Samuel Hall, Brian Hamilton, Thomas Hampson, Xiaoxue Han, Stephanie Hansmann-Menzemer, Neville Harnew, Samuel Harnew, Jonathan Harrison, Jibo He, Timothy Head, Veerle Heijne, Karol Hennessy, Pierre Henrard, Louis Henry, Jose Angel Hernando Morata, Eric van Herwijnen, Miriam Heß, Adlène Hicheur, Donal Hill, Mostafa Hoballah, Christoph Hombach, Wouter Hulsbergen, Thibaud Humair, Nazim Hussain, David Hutchcroft, Daniel Hynds, Marek Idzik, 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Olivier Leroy, Tadeusz Lesiak, Blake Leverington, Yiming Li, Tatiana Likhomanenko, Myfanwy Liles, Rolf Lindner, Christian Linn, Federica Lionetto, Bo Liu, Stefan Lohn, Iain Longstaff, Jose Lopes, Peter Lowdon, Donatella Lucchesi, Haofei Luo, Anna Lupato, Eleonora Luppi, Oliver Lupton, Frederic Machefert, Irina V Machikhiliyan, Florin Maciuc, Oleg Maev, Sneha Malde, Alexander Malinin, Giulia Manca, Giampiero Mancinelli, Peter Mich Manning, Alessandro Mapelli, Jan Maratas, Jean F Marchand, Umberto Marconi, Carla Marin Benito, Pietro Marino, Raphael Märki, Jörg Marks, Giuseppe Martellotti, Maurizio Martinelli, Diego Martinez Santos, Fernando Martinez Vidal, Danielle Martins Tostes, André Massafferri, Rosen Matev, Zoltan Mathe, Clara Matteuzzi, Andrea Mauri, Brice Maurin, Alexander Mazurov, Michael McCann, James McCarthy, Andrew McNab, Ronan McNulty, Ben McSkelly, Brian Meadows, Frank Meier, Marco Meissner, Marcel Merk, Diego Alej Milanes, Marie-Noel Minard, Dominik St Mitzel, Josue Molina 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Liang Zhong

Research output: Contribution to journalArticlepeer-review

Abstract

A measurement of the production cross-section for $Z$ bosons that decay to muons is presented. The data were recorded by the LHCb detector during $pp$ collisions at a centre-of-mass energy of 7 TeV, and correspond to an integrated luminosity of 1.0 fb$^{-1}$. The cross-section is measured for muons in the pseudorapidity range $2.0 <\eta <4.5$ with transverse momenta $p_{T} > 20$ GeV/c. The dimuon mass is restricted to $60 <M_{\mu^{+}\mu^{-}} <120$ GeV/c$^{2}$. The measured cross-section is $$\sigma_{Z\rightarrow\mu^{+}\mu^{-}} = (76.0 \pm 0.3 \pm 0.5 \pm 1.0 \pm 1.3) \, \text{pb}$$ where the uncertainties are due to the sample size, systematic effects, the beam energy and the luminosity. This result is in good agreement with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics. The cross-section is also measured differentially as a function of kinematic variables of the $Z$ boson. Ratios of the production cross-sections of electroweak bosons are presented using updated LHCb measurements of $W$ boson production. A precise test of the Standard Model is provided by the measurement of the ratio $$\frac{\sigma_{W^{+}\rightarrow\mu^{+}\nu_{\mu}} + \sigma_{W^{-}\rightarrow\mu^{-}\bar{\nu}_{\mu}}}{\sigma_{Z\rightarrow\mu^{+}\mu^{-}}} = 20.63\pm0.09\pm0.12\pm0.05,$$ where the uncertainty due to luminosity cancels.
Original languageEnglish
Article numberAaij:2015gna
Pages (from-to)039
Journal Journal of High Energy Physics
Volume1508
DOIs
Publication statusPublished - 10 Aug 2015

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