Observation of Z decays to four leptons with the CMS detector at the LHC

  title={Observation of Z decays to four leptons with the CMS detector at the LHC},
  author={Serguei Chatrchyan and V. Khachatryan and Albert M. Sirunyan and A. Tumasyan and Winfried Adam and Ernest Aguil{\'o} and Thomas Bergauer and Marko Dragicevic and J{\'a}nos Er{\"o} and Christian Fabjan and Martin Friedl and Rudolf Fruehwirth and Vasile Mihai Ghete and Josef Hammer and Natascha Hoermann and Josef Hrubec and Manfred Jeitler and Wolfgang Kiesenhofer and Valentin Kn{\"u}nz and Manfred Krammer and Dietrich Liko and Ivan Mikulec and Manfred Pernicka and Babak Rahbaran and Christine Rohringer and Herbert Rohringer and Robert Sch{\"o}fbeck and Josef Strauss and Anton Taurok and Peter Wagner and Wolfgang Waltenberger and Gerhard Walzel and Edmund Widl and C.-E. Wulz and Vladimir Mossolov and Nikolai Shumeiko and Juan Suarez Gonzalez and Sunil Bansal and T. Cornelis and E. A. De Wolf and X. Janssen and Sten Luyckx and Luca Mucibello and Silvia Ochesanu and Benoit Roland and Romain Rougny and Michele Selvaggi and Zlatka Staykova and H. Van Haevermaet and Pierre Van Mechelen and N. Van Remortel and A. Van Spilbeeck and Freya Blekman and Stijn Blyweert and Jo{\"e}lle Dhondt and Rebeca Gonzalez Suarez and Alexis Kalogeropoulos and Michael Maes and Annik Olbrechts and W. Van Doninck and P. Van Mulders and G. P. Van Onsem and Ilaria Villella and Barbara Clerbaux and Gilles De Lentdecker and Vincent Dero and A. P. R. Gay and Tomas Hreus and A. L{\'e}onard and Pierre Marage and Abdollah Mohammadi and Tim Reis and Laurent S. V. Thomas and C. Vander Velde and Pascal Vanlaer and Jing Wang and Volker Adler and Kelly Beernaert and Anna Cimmino and Silvia Costantini and Guillaume Garcia and Martin Grunewald and Bertram Klein and J{\'e}r{\'e}mie Lellouch and Andrey Marinov and Joseph Mccartin and Alberto Andres Ocampo Rios and Dirk Ryckbosch and Nadja Strobbe and Filip Thyssen and M. Tytgat and Piet Verwilligen and Sin'ead Walsh and Efe Yazgan and Nicolas Zaganidis and Suzan Basegmez and Giacomo Bruno and Roberto Castello and Ludivine Ceard and Christophe Delaere and Thomas A. De Pree and Denis Favart and Laurent Forthomme and Andrea Giammanco and Jonathan Hollar and Vincent Lemaitre and Junhui Liao and O. Militaru and Claude Nuttens and Davide Pagano and Arnaud Willy J Pin and Krzysztof Piotrzkowski and Nicolas Schul and J. M. Vizan Garcia and Nikita Beliy and Thierry Caebergs and Evelyne Daubie and Gregory Habib Hammad and Gilvan Alves and Marcos Correa Martins Junior and D. De Jesus Damiao and T. Dos Reis Martins and M. E. Pol and M. H. G. Souza and Walter Luiz Ald{\'a} J{\'u}nior and Wagner Carvalho and Analu Cust{\'o}dio and E. M. Da Costa and C. De Oliveira Martins and S. Fonseca De Souza and D. Matos Figueiredo and L. Mundim and Helio Nogima and Vitor Oguri and W. L. Prado Silva and Alberto Santoro and Luana Soares Jorge and Andre Sznajder and C. A. Bernardes and Flavia De Almeida Dias and Trfp Tomei and Eduardo De Moraes Gregores and Caio Lagana and Fam Marinho and Pedro G Mercadante and S{\'e}rgio Ferraz Novaes and Sandra S. Padula and Vladimir Genchev and Plamen Iaydjiev and Stefan Piperov and Mircho Rodozov and S. Stoykova and Georgi Sultanov and Vanio Tcholakov and Rumen Trayanov and Mariana Vutova and Anton Dimitrov and Roumyana Hadjiiska and Venelin Kozhuharov and Leander Litov and Borislav Pavlov and Peicho Petkov and J. G. Bian and Guorong Chen and H. S. Chen and C. H. Jiang and Dong Liang and Shuangran Liang and Xiangfei Meng and J. Tao and Xiao Wang and Zhangqier Wang and Hong Xiao and Menglin Xu and Jingjing Zang and Zhidong Zhang and C. Asawatangtrakuldee and Y. Ban and Shaoming Guo and Yongliang Guo and Wenzhao Li and Suyuan Liu and Y. Mao and S. J. Qian and H. Teng and D. Wang and Linlin Zhang and Bao-long Zhu and Wei Zou and Carlos {\'A}vila and Jonatan Piedra Gomez and B. Gomez Moreno and A. F. Osorio Oliveros and Juan Carlos Sanabria and Nikola Godinovi{\'c} and Damir Lelas and Roko Ple{\vs}tina and Dunja Polic and Ivica Puljak and Z. Antunovic and M. Kovac and Vuko Brigljevic and Senka Duric and Kreso Kadija and Jelena Lueti{\'c} and Sre{\'c}ko Morovi{\'c} and Alexandros Attikis and Mario Galanti and Georgios Mavromanolakis and Jehad Mousa and C. Nicolaou and Fotios Ptochos and Panos A. Razis and M. Jr. Finger and Yasser Assran and Sherif Elgammal and Ali Ellithi Kamel and Mohammed Mahmoud and Ahmad Radi and Mario Kadastik and Mait M{\"u}ntel and Martti Raidal and Liis Rebane and Andres Tiko and Paula Eerola and Giacomo Fedi and Mikko Voutilainen and Jaakko H{\"a}rk{\"o}nen and Aimo Heikkinen and Veikko Karim{\"a}ki and Ritva Kinnunen and Matti J. Kortelainen and Tapio Lamp{\'e}n and Kati Lassila-Perini and Sami Lehti and T. Lind{\'e}n and P. Luukka and Teppo M{\"a}enp{\"a}{\"a} and Timo Peltola and Eija Tuominen and Jorma Tuominiemi and E. Tuovinen and Donatella Ungaro and Lauri Wendland and Kukka Banzuzi and Ahti Karjalainen and Arja Korpela and Tuure Tuuva and Marc Besancon and Somnath Choudhury and Marc Dejardin and Daniel Denegri and Bernard Fabbro and J. L. Faure and Federico Ferri and Serguei Ganjour and Alain Givernaud and Philippe Gras and G. Hamel de Monchenault and Patrick Jarry and Elizabeth Locci and Julie Malcles and Laurent Millischer and Aruna Nayak and Jacklyn A Rander and Andr{\'e} Rosowsky and I. Shreyber and Maksym Titov and St{\'e}phanie Baffioni and Florian Beaudette and Lamia Benhabib and Louis Bianchini and Michał Bluj and Clementine Broutin and P. Busson and Claude Charlot and Nadir Daci and Torsten Dahms and Ludwik Dobrzyński and R. Granier de Cassagnac and Maurice Haguenauer and P. Min{\'e} and Camelia Mironov and M. Nguyen and Christophe Ochando and Pascal Paganini and David Sabes and Roberto Salerno and Yves Sirois and Christian Veelken and Alexandre Zabi and J. L. Agram and Jeremy Andrea and Daniel Bloch and David Bodin and J. -M. Brom and Marco Cardaci and E. C. Chabert and Caroline Collard and Elio Conte and Fr{\'e}d{\'e}ric Drouhin and Cristina Ferro and J. C. Fontaine and Denis Gel{\'e} and Ulrich Goerlach and Pierre Juillot and A.-C. Le Bihan and Pierre M. Van Hove and Farida Fassi and Damien Mercier and Stephanie Beauceron and Nicolas Beaupere and Olivier Bondu and Gaelle Boudoul and Julien Chasserat and Roberto Chierici and Didier Contardo and Pierre Depasse and H. El Mamouni and Jean Fay and Susan Gascon and Maxime Gouzevitch and Bernard Ille and Tibor Kurca and Morgan Lethuillier and Laurent Mirabito and St{\'e}phane Perries and Viola Sordini and Silvano Tosi and Yohann Tschudi and Patrice Verdier and S{\'e}bastien Viret and Zviad Tsamalaidze and Georgios Anagnostou and Sarah Beranek and Matthias Edelhoff and Lutz Feld and Natalie Heracleous and Otto Hindrichs and Ruediger Jussen and K. Klein and Jennifer Merz and A. Ostapchuk and Adrian Perieanu and Frank Raupach and J. Sammet and Stefan Schael and Dietmar Sprenger and Hannsjoerg Artur Weber and Bruno Wittmer and V. Zhukov and Metin Ata and Julien Caudron and Erik Dietz-Laursonn and Deborah Duchardt and Martin Erdmann and Robert Fischer and Andreas G{\"u}th and Thomas Hebbeker and Carsten Heidemann and Kerstin Hoepfner and Dennis Klingebiel and Peter Kreuzer and Joschka Lingemann and C. Magass and Markus Merschmeyer and Andreas Bernhard Meyer and Mark Olschewski and Paul Papacz and Holger Pieta and Hans Reithler and Stefan Antonius Schmitz and Lars Sonnenschein and Jan Steggemann and Daniel Teyssier and M. F. Weber and Michael Bontenackels and V. Cherepanov and G{\"u}nter Fl{\"u}gge and Heiko Geenen and M. Geisler and Wael Haj Ahmad and Felix Hoehle and Bastian Kargoll and Toni Kress and Yvonne Kuessel and Andreas Nowack and Lars Perchalla and Oliver Pooth and J{\"o}rg Rennefeld and Philip Sauerland and Alexander St{\aa}hl and Mar{\'i}a Mart{\'i}n and J. K. Behr and Wolf Behrenhoff and Ulf Behrens and Matthias Bergholz and Agni Bethani and Kerstin Borras and Armin Burgmeier and Altan Çakir and L. Calligaris and Ann Campbell and E. Castro and Francesco Costanza and Dirk Dammann and Carmen Diez Pardos and Guenter Eckerlin and Doris Eckstein and Gero Flucke and Achim Geiser and Ivan Glushkov and Paolo Gunnellini and Salman Habib and J. Hauk and Gregor Hellwig and Hannes Jung and Matthias Kasemann and Panagiotis Katsas and Claus Kleinwort and Hannelies Kluge and Albert Knutsson and Manuel Kr{\"a}mer and Dirk Kr{\"u}cker and Ekaterina Kuznetsova and Wolfgang Lange and Wolfgang Lohmann and Benjamin Lutz and Rainer Mankel and I. B. Marfin and Markus Marienfeld and I. -A. Melzer-Pellmann and Joachim Mnich and Andreas Mussgiller and Sebastian Naumann-Emme and Jan Olzem and Hanno Perrey and Alexey Petrukhin and Daniel Pitzl and Alexei Raspereza and P. M. Ribeiro Cipriano and Caroline Riedl and Eduard Ron and Michele Rosin and Jakob Salfeld-Nebgen and Ringo Schmidt and Thomas Schoerner-Sadenius and Niladri Sen and Alexander Spiridonov and Matthias Stein and R. Walsh and Christoph Wissing and C. Autermann and Volker Blobel and Julia Dr{\"a}ger and Holger Enderle and Joachim Erfle and Ulla Gebbert and Martin G{\"o}rner and Thomas Hermanns and R. S. Hoeing and Kolja Kaschube and Gordon Kaussen and Henning Kirschenmann and Robert Klanner and J. Lange and Benedikt Mura and Friederike Nowak and Thomas Peiffer and Niklas Pietsch and Denis Rathjens and C. Sander and Hannes Schettler and Peter Schleper and Eike Schlieckau and Alexander Schmidt and Matthias Schr{\"o}der and Torben Schum and M. Seidel and Valentina Sola and Hartmut Stadie and Georg Steinbrueck and Jan Thomsen and Lukas Vanelderen and Christian Barth and J. Berger and Christian Boeser and Thorsten Chwalek and Willem Boer and Alexis Descroix and Alexander Dierlamm and Michael Feindt and Moritz Guthoff and Christoph Hackstein and Frank Hartmann and Thomas Hauth and Michael Heinrich and Hauke Held},
  journal={Journal of High Energy Physics},
  • Serguei Chatrchyan, V. Khachatryan, +497 authors Hauke Held
  • Published 2012
  • Physics
  • A bstractThe first observation of the Z boson decaying to four leptons in proton-proton collisions is presented. The analyzed data set corresponds to an integrated luminosity of 5.02 fb−1 at $ \sqrt{s}=7 $ TeV collected by the CMS detector at the Large Hadron Collider. A pronounced resonance peak, with a statistical significance of 9.7 σ, is observed in the distribution of the invariant mass of four leptons (electrons and/or muons) with mass and width consistent with expectations for Z boson… CONTINUE READING

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