Evidence for associated production of a single top quark and W boson in pp collisions at sqrt[s]=7  TeV.

@article{Chatrchyan2013EvidenceFA,
  title={Evidence for associated production of a single top quark and W boson in pp collisions at sqrt[s]=7  TeV.},
  author={S. Chatrchyan and Vladimir Khachatryan and A. M. Sirunyan and A. Tumasyan and Waldemar Adam and Eugeni Aguil{\'o} and T. Bergauer and Miroslav Dragicevic and J. Er{\"o} and Christian W. Fabjan and Michal Friedl and Rudolf Fruehwirth and V. M. Ghete and Joseph Hammer and N. H{\"o}rmann and J. Hrubec and Manfred Jeitler and W. Kiesenhofer and V. Kn{\"u}nz and Manfred Krammer and I. Kr{\"a}tschmer and Dietri h Liko and I. Mikulec and Mag. Elisabeth Pernicka and Babak Rahbaran and C. Rohringer and H. Rohringer and Robert Sch{\"o}fbeck and Judith Strau\ss and A. Taurok and Wolfgang Waltenberger and Gertraud Walzel and E. Widl and C-E Wulz and V. Mossolov and N F Shumeĭko and J. Suarez Gonzalez and Mitali Bansal and sonia. bansal and T. Cornelis and E. A. De Wolf and Xavier Janssen and Sten Luyckx and L. Mucibello and S. Ochesanu and Baumberger Roland and R. Rougny and Michele Selvaggi and Z. Staykova and H. Van Haevermaet and P. Van Mechelen and N Van Remortel and A. Van Spilbeeck and F. Blekman and S. Blyweert and Jorgen D'Hondt and R Gonzalez Suarez and Andreas Kalogeropoulos and Micha{\"e}l Maes and A. Olbrechts and W. Van Doninck and P. Van Mulders and G. P. Van Onsem and Ilaria Villella and Barbara Clerbaux and G. De Lentdecker and V. Dero and Alan P. Gay and Tomas Ngadiuba Hreus and A. Leonard and P. E. Marage and Azadeh Mohammadi and T Mascarenhas Godinho Reis and Leif Thomas and G Vander Marcken and C. Vander Velde and Pascal Vanlaer and V. E. Adler and Kim Beernaert and Alberto Cimmino and Silvia Costantini and Gustavo Mora Garc{\'i}a and Mart{\'i}n G. Ch{\'a}vez Grunewald and Brout Klein and Joseph Lellouch and Angel Marinov and J. Mccartin and A. A. Ocampo Rios and Dirk Ryckbosch and N. Strobbe and Frances Thyssen and Michel Tytgat and P. Verwilligen and Samuel Walsh and Efe Yazgan and N. Zaganidis and S. Basegmez and Giovanni Luigi Bruno and Robert Castello and L. Ceard and C. Delaere and T. du Pree and D. Favart and L. Forthomme and A. Giammanco and Jonathan Hollar and Vincent Lemaitre and J. Liao and O. Militaru and C. Nuttens and Dullio Pagano and A. W. J. Pin and Krzysztof Piotrzkowski and Nicolas Schul and J. M. Vizan Garcia and N. Beliy and Thierry Caebergs and E. Daubie and Gehan Hammad and Giordano Alves and M. Correa Martins Junior and Tathiane A. L. Martins and Manisha Pol and M. H. G. Souza and W. L. Ald{\'a} J{\'u}nior and Waldimir Carvalho and Aline A. Cust{\'o}dio and Elaine Monteiro da Costa and D. De Jesus Damiao and Caroline Alves de Oliveira Martins and S. Fonseca De Souza and D. Matos Figueiredo and Leandro Resende Mundim and H. Nogima and Vitor Oguri and W. L. Prado Da Silva and Alberto F. S. Santoro and L Soares Jorge and Anna Sznajder and T. S. Anjos and Camila Bernardes and F. de Almeida Dias and T. R. Fernandez Perez Tomei and E. Gregores and Catarina Lagana and Fabiano A. Marinho and Pedro G. Mercadante and S. Novaes and Sandra S. Padula and V. Genchev and P. S. Iaydjiev and Stefan Piperov and M. Rodozov and Silviya Stoykova and G. F. Sultanov and V. Tcholakov and R. Trayanov and M. Vutova and Anton Dimitrov and R. M. Hadjiiska and Venelin Kozhuharov and Lubomir Litov and Boris Pavlov and P. Petkov and J. G. Bian and G. M. Chen and Hesheng Chen and Chang-sheng Jiang and Deshan Liang and S. Liang and Xiangyu Meng and Junquan Tao and Jian-xiong Wang and Xin-Nian Wang and Zhe Wang and Huizhong Xiao and Miaofu Xu and Jun Zang and Zhiyong Zhang and C. Asawatangtrakuldee and Yue Yuan Ban and Yi Tai Guo and Shang Liu and Ying-nan Mao and S. J. Qian and Hao Teng and Daifa Wang and Lili Zhang and Wen Zou and Cathy Avila and Julian Gomez and B. Gomez Moreno and A F Osorio Oliveros and Jorge C. Sanabria and N. Godinovic and D. Lelas and R. Plestina and Drazen Polic and I. Puljak and Zeljko Antunovic and Marko A Kovac and Vuko Brigljevic and Stojanka Duri{\'c} and K. Kadija and J. Luetic and Sandra Morovi{\'c} and A. Attikis and M J Galanti and G. Mavromanolakis and Jarrod Mousa and C. Nicolaou and F. Ptochos and P. A. Razis and Markus Finger and Y. Assran and Sara S. Elgammal and A. Ellithi Kamel and Mohamed A. E. Mahmoud and Amr Radi and Mario Kadastik and M. M{\"u}ntel and Martti Raidal and Liis Rebane and A. Tiko and Paula Eerola and G. Fedi and Maria Voutilainen and Jari H{\"a}rk{\"o}nen and Aatos Heikkinen and Veikko Karim{\"a}ki and Ritva Kinnunen and M. J. Kortelainen and Tapio Lamp{\'e}n and Kati Lassila-Perini and Satu Lehti and Ted Linden and Panja Luukka and Tapio M{\"a}enp{\"a}{\"a} and Timo A. Peltola and E. Tuominen and J. Tuominiemi and E M Tuovinen and Donatella Ungaro and Liz Wendland and K. Banzuzi and Antti Karjalainen and A Pauliina Korpela and Tuure Tuuva and Marc Besançon and Somnath Choudhury and Marcus Dejardin and D. Denegri and Bernard Fabbro and J. L. Faure and Fabio Ferri and Serguei Ganjour and A. Givernaud and Philippe Gras and G. Hamel de Monchenault and Philippe Jarry and Elizabeth Locci and J. Malcl{\`e}s and Laurent Millischer and Ashwin Nayak and J. Rander and Andr{\'e} Rosowsky and I. Shreyber and M. A. Titov and S. Baffioni and F. R. Beaudette and L. Benhabib and Larissa Bianchini and Michal Bluj and Cecile Broutin and Philippe Busson and C. Charlot and Nadir Daci and Thomas Dahms and M. Dalchenko and Ludwik Dobrzynski and R. Granier de Cassagnac and Marianne Haguenauer and Ph. Min{\'e} and C. Mironov and I. N. Naranjo and Matthew Ba Nguyen and Cristina Ochando and Pascal Paganini and D. Sabes and R. Salerno and Y. Sirois and Christian Veelken and A. Zabi and J-L Agram and Jeremy Andrea and Debbie Bloch and Derek Bodin and J-M Brom and Massimo Cardaci and E. C. Chabert and Caroline Collard and elio. conte and François Drouhin and Cl{\'a}udia Ferro and J. G. Fontaine and D. Gel{\'e} and Ulrich Goerlach and P. Juillot and A-C Le Bihan and Patrick Van Hove and Farida Fassi and D. Mercier and S. Beauceron and N. Beaupere and O. Bondu and Ga{\"e}lle Boudoul and J. Chasserat and Roberto Chierici and Didier Contardo and P. Depasse and H. El Mamouni and Joseph Fay and St{\'e}phane Gascon and Maxime Gouzevitch and B. Ille and Tibor Kurca and M. Lethuillier and L. Mirabito and St{\'e}phane Perries and L. Sgandurra and Viola Sordini and Y. Tschudi and P. Verdier and S. Viret and V. Roinishvili and Garifalos Anagnostou and Christian Autermann and Sheldon Baron Bol t Beranek and M. Edelhoff and Lutz Feld and N. Heracleous and O. Hindrichs and R. Jussen and K H Klein and Justin Merz and Andriy Ostapchuk and A. Perieanu and F. Raupach and J. F. Sammet and St. Schael and Dirk Sprenger and Hans I. Weber and Bruno Wittmer and Valery Zhukov and Metin Ata and Julien Caudron and E. Dietz-Laursonn and D. Duchardt and Martin Erdmann and Robert P. Fischer and Antje G{\"u}th and Thomas Hebbeker and Cornelius Heidemann and K. Hoepfner and Daniela Klingebiel and Peter Kreuzer and M. Merschmeyer and Andreas B. Meyer and Mark Olschewski and P. Papacz and H. Pieta and Hans Reithler and Sebastian Schmitz and Lars Sonnenschein and Jan Steggemann and D. Teyssier and M. Bontenackels and Vasily Cherepanov and Y. Erdogan and G. Fl{\"u}gge and Hansenne M Geenen and Markus Geisler and W. Haj Ahmad and Frieder Hoehle and Boris Kargoll and Thomas Kress and Y. Kuessel and J. Lingemann and Antje Nowack and L. Perchalla and Oliver. Pooth and P. Sauerland and Achim Stahl and M. Aldaya Martin and J{\"o}rg Behr and W. Behrenhoff and Ulf Behrens and Matthias Bergholz and A. Bethani and Kerstin Borras and Andr{\'e} Burgmeier and Altan Çakir and Lorenzo Calligaris and Anne H Campbell and E. Castro and Flavia Costanza and Dr. Fritz Dammann and C. Diez Pardos and Geofrey E. Eckerlin and Dieter Eckstein and Gero Flucke and Achim Geiser and I. V. Glushkov and P. Gunnellini and Salman Habib and Jenny Hauk and G. Hellwig and Hoill Jung and Matthias Kasemann and Panayiotis G. Katsas and Claus Kleinwort and H G Kluge and Albert Knutsson and M. Kulesza Kr{\"a}mer and D. Kruecker and Elizaveta Kuznetsova and Wulfhard Lange and Wolfgang Lohmann and Benjamin Johannes Lutz and Rainer Mankel and I. Marfin and M. Marienfeld and I-A Melzer-Pellmann and Joachim Mnich and A. Mussgiller and S. Naumann-Emme and O. Novgorodova and J. Olzem and Hanno Perrey and Alexey Petrukhin and Daniel Pitzl and Alexei Raspereza and P. M. Ribeiro Cipriano and Claudia Riedl and Elber Ron and M. Rosin and J. Salfeld-Nebgen and Ronny Schmidt and Thomas Schoerner-Sadenius and Nandini Sen and Alexander Spiridonov and Michael Stein and Roberval Walsh and Christiane Wissing and Volker Blobel and Julia Dr{\"a}ger and H. Enderle and J. D. Erfle and U. Gebbert and Matthias G{\"o}rner and Till Hermanns and R. S. H{\"o}ing and Kolja Kaschube and G. Kaussen and H. Kirschenmann and Robert Klanner and Joerg Lange and Benedikt Mura and Frank Nowak and Th Peiffer and Niklas Pietsch and D. Rathjens and Christian Sander and H. Schettler and P. Schleper and E. Schlieckau and Annemarie Schmidt and Michael Schr{\"o}der and Tom Schum and Marcus Seidel and Jennifer Sibille and Vicente D Sol{\`a} and H. Stadie and Georg Steinbr{\"u}ck and Jennifer Thomsen and Lukas Vanelderen and Carlo Barth and J. O. Berger and Cornelia Boeser and Th Chwalek and Wietse de Boer and Aur{\'e}lie Descroix and A. Dierlamm and Michael Feindt and Mainz R Guthoff and C. Hackstein and Frank Hartmann and Thomas Hauth and Martine Heinrich},
  journal={Physical review letters},
  year={2013},
  volume={110 2},
  pages={022003}
}
Evidence is presented for the associated production of a single top quark and W boson in pp collisions at sqrt[s]=7  TeV with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 4.9  fb(-1). The measurement is performed using events with two leptons and a jet originated from a b quark. A multivariate analysis based on kinematic properties is utilized to separate the tt background from the signal. The observed signal has a significance of 4.0σ and… CONTINUE READING
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