Measurement of the forward-backward asymmetry in Z/γ∗ → μ+μ− decays and determination of the effective weak mixing angle

  title={Measurement of the forward-backward asymmetry in Z/γ∗ → μ+μ− decays and determination of the effective weak mixing angle},
  author={R. Aaij and B. Adeva and M. Adinolfi and A. Affolder and Z. Ajaltouni and S. Akar and J. Albrecht and Federico Alessio and M. Alexander and S. Ali and G. Alkhazov and P. Alvarez Cartelle and A. A. Alves and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and J. Anderson and G. Andreassi and M. Andreotti and J. E. Andrews and R. Appleby and O. Aquines Gutierrez and F. Archilli and P. d’Argent and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and J. J. Back and A. Badalov and C. Baesso and W. Baldini and R. Barlow 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 L. Bel and V. Bellee and N. Belloli and I. Belyaev and E. Benhaim and G. Bencivenni and S. Benson and J. Benton and A. Berezhnoy and R. Bernet and A. Bertolin and M. Bettler and M. Beuzekom and A. Bie{\~n} and S. Bifani and P. Billoir and T. Bird and A. Birnkraut and A. Bizzeti 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 M. Borsato and T. Bowcock and E. Bowen and C. Bozzi and S. Braun and M. Britsch and T. Britton and J. Brodzicka and N. H. Brook and E. Buchanan and A. Bursche and J. Buytaert and S. Cadeddu and R. Calabrese and M. Calvi and M. Calvo Gomez and P. Campana and D. C. Campora Perez and L. Capriotti and A. Carbone and G. Carboni and R. Cardinale and A. Cardini and P. Carniti and L. Carson and K. Carvalho Akiba and G. Casse and L. Cassina and L. Castillo Garcia and M. Cattaneo and Ch. Cauet and G. Cavallero and R. Cenci and M. Charles and P. Charpentier and M. Chefdeville and S. Chen and S. Cheung and N. Chiapolini and M. Chrzaszcz and X. Cid Vidal and G. Ciezarek and P. Clarke and M. Clemencic and H. Cliff and J. Closier and V. Coco and J. Cogan and E. Cogneras and V. Cogoni 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 B. Couturier and G. Cowan and D. Craik and A. Crocombe and M. Cruz Torres and S. Cunliffe and R. Currie and C. D'Ambrosio and E. Dall’Occo and J. Dalseno and P. David and A. Davis and O. Aguiar Francisco and K. Bruyn and S. Capua and M. Cian and J. Miranda and L. Paula and P. Simone and C. Dean and D. Decamp and M. Deckenhoff and L. Buono and N. Déléage and M. Demmer and D. Derkach and O. Deschamps and F. Dettori and B. Dey and A. Canto and F. Ruscio and H. Dijkstra and S. Donleavy and F. Dordei and M. Dorigo and A. Dosil Su{\'a}rez and D. Dossett and A. Dovbnya and K. Dreimanis and L. Dufour 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 I. Rifai and C. Elsasser and S. Ely and S. Esen and H. Evans and T. Evans and A. Falabella and C. F{\"a}rber and N. Farley and S. Farry and R. Fay and D. Ferguson and V. Fernandez Albor and F. Ferrari and F. Ferreira Rodrigues and M. Ferro-Luzzi and S. Filippov and M. Fiore and M. Fiorini and M. Firlej and C. Fitzpatrick and T. Fiutowski and K. Fohl and P. Fol and M. Fontana and F. Fontanelli and R. Forty and M. Frank and C. Frei and M. Frosini and J. Fu and E. Furfaro and A. Gallas Torreira and D. Galli and S. Gallorini and S. Gambetta and M. Gandelman and P. Gandini and Y. Gao and J. Garc{\'i}a Pardi{\~n}as and J. Garra Tico and L. Garrido and D. Gascon and C. Gaspar and R. Gauld and L. Gavardi and G. Gazzoni and D. Gerick and E. Gersabeck and M. Gersabeck and T. Gershon and P. Ghez and S. Giani and V. Gibson and O. G. Girard and L. Giubega and V. Gligorov and C. G{\"o}bel and D. Golubkov and A. Golutvin and A. Gomes and C. Gotti and M. Grabalosa G{\'a}ndara and R. Graciani Diaz and L. A. Granado Cardoso and E. Grauges and E. Graverini and G. Graziani and A. Grecu and E. Greening and S. Gregson and P. Griffith and L. Grillo and O. Gr{\"u}nberg and B. Gui and E. Gushchin and Y. Guz and T. Gys and T. Hadavizadeh and C. Hadjivasiliou and G. Haefeli and C. Haen and S. Haines and S. Hall and B. Hamilton and X. Han and S. Hansmann-Menzemer and N. Harnew and S. Harnew and J. Harrison and J. He and T. Head and V. Heijne and K. Hennessy and P. Henrard and L. Henry and E. Herwijnen and M. Hess and A. Hicheur and D. Hill and M. Hoballah and P. H. Hopchev and W. Hulsbergen and T. Humair and N. Hussain and D. Hutchcroft and D. Hynds and M. Idzik and P. Ilten and R. Jacobsson and A. J{\"a}ger and J. Jałocha and E. Jans and A. Jawahery and F. Jing and M. John and D. Johnson and C. R. Jones and C. Joram and B. Jost and N. Jurik and S. Kandybei and W. Kanso and M. Karacson and T. Karbach and S. Karodia and M. Kecke and M. Kelsey and I. Kenyon and M. Kenzie and T. Ketel and E. Khairullin and B. Khanji and C. Khurewathanakul and S. Klaver and K. Klimaszewski and O. Kochebina and M. Kolpin and I. Komarov and R. Koopman and P. Koppenburg and M. Kozeiha and L. Kravchuk and K. Kreplin and M. Kreps and G. Krocker and P. Krokovny and F. Kruse and W. Krzemien and W. Kucewicz and M. Kucharczyk and V. Kudryavtsev and A. Kuonen and K. Kurek and T. Kvaratskheliya and D. Lacarrere and G. Lafferty and A. Lai and D. Lambert and G. Lanfranchi and C. Langenbruch and B. Langhans and T. Latham and C. Lazzeroni and R. Gac and J. Leerdam and J. Lees and R. Lefevre and A. Leflat and J. Lefrançois and E. Lemos Cid and O. Leroy and T. Lesiak and B. Leverington and Y. Li and T. Likhomanenko and M. Liles and R. Lindner and C. Linn and F. Lionetto and B. Liu and X. Liu and D. Loh and I. Longstaff and J. R. Lopes and D. Lucchesi and M. Lucio Mart{\'i}nez and H. Luo and A. Lupato and E. Luppi and O. Lupton and A. Lusiani and F. Machefert and F. Maciuc and O. Maev and K. Maguire and S. Malde and A. Malinin and G. Manca and G. Mancinelli and P. Manning and A. Mapelli and J. Maratas and J. Marchand and U. Marconi and C. Mar{\'i}n Benito and P. Marino and J. Marks and G. Martellotti and M. Martin and M. Martinelli and D. Mart{\'i}nez Santos and F. Martinez Vidal and D. Martins Tostes and A. Massafferri and R. Matev and A. Mathad and Z. Mathe and C. Matteuzzi and A. Mauri and B. Maurin and A. Mazurov and M. McCann and J. McCarthy and A. Mcnab and R. McNulty and B. Meadows and F. Meier and M. Meissner and D. Melnychuk and M. Merk and E. Michielin and D. Milanes and M. Minard and D. Mitzel and J. Molina Rodriguez and I. Monroy and S. Monteil and M. Morandin and P. Morawski and A. Mord{\`a} and M. J. Morello and J. Moroń and A. Morris and R. Mountain and F. Muheim and D. Mueller and J. M{\"u}ller and K. Mueller and V. M{\"u}ller and M. Mussini and B. Muster and P. Naik and T. Nakada and R. Nandakumar and A. Nandi and I. Nasteva and M. Needham and N. Neri and S. Neubert and N. Neufeld and M. Neuner and A. Nguyen and T. D. Nguyen and C. Nguyen-Mau and V. Niess and R. Niet and N. Nikitin and T. Nikodem and A. Novoselov and D. O’Hanlon and A. Oblakowska-Mucha and V. Obraztsov and S. Ogilvy and O. Okhrimenko and R. Oldeman and C. Onderwater and B. Osorio Rodrigues and J. M. Otalora Goicochea and A. Otto and P. Owen and A. Oyanguren and A. Palano and F. Palombo and M. Palutan and J. Panman and A. Papanestis and M. Pappagallo and L. Pappalardo and C. Pappenheimer and W. Parker and C. Parkes and G. Passaleva and G. Patel and M. Patel and C. Patrignani and A. Pearce and A. Pellegrino and G. Penso and M. Pepe Altarelli and S. Perazzini and P. Perret and L. Pescatore and K. Petridis and A. Petrolini and M. Petruzzo and E. Picatoste Olloqui and B. Pietrzyk and T. Pilař and D. Pinci and A. Pistone},
  journal={Journal of High Energy Physics},
  • R. Aaij, B. Adeva, +497 authors A. Pistone
  • Published 2015
  • Physics
  • Journal of High Energy Physics
  • A bstractThe forward-backward charge asymmetry for the process qq¯→Z/γ∗→μ+μ−$$ q\overline{q}\to Z/{\gamma}^{\ast}\to {\mu}^{+}{\mu}^{-} $$ is measured as a function of the invariant mass of the dimuon system. Measurements are performed using proton proton collision data collected with the LHCb detector at s=7$$ \sqrt{s}=7 $$ and 8 TeV, corresponding to integrated luminosities of 1 fb−1 and 2 fb−1 respectively. Within the Standard Model the results constrain the effective electroweak mixing… CONTINUE READING
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