Study of the energy dependence of the underlying event in proton-antiproton collisions

  title={Study of the energy dependence of the underlying event in proton-antiproton collisions},
  author={Cdf collaboration T. Aaltonen and Silvia Amerio and Dante Amidei and Anton Anastassov and Alberto Annovi and Joseph Antos and Giorgio Apollinari and J. A. Appel and Tetsuo Arisawa and Akmal Artikov and J. A. Asaadi and W. J. Ashmanskas and Benjamin Auerbach and M. G. Albrow and Adam Aurisano and Farrukh Azfar and William Badgett and Taegil Bae and A. Barbarogaltieri and V. E. Barnes and B. A. Barnett and Patrizia Barria and Pavol Barto{\vs} and Matteo Bauce and Franco Bedeschi and S. Behari and Giorgio Bellettini and James Nugent Bellinger and Douglas Benjamin and Andrew Beretvas and Anwar Bhatti and K. R. Bland and Barry Blumenfeld and Andrea Bocci and Arie Bodek and Daniela Bortoletto and Joseph Boudreau and Antonio Boveia and Luca Brigliadori and Christopher Bromberg and Erik Jens Brucken and Ju. A. Budagov and H. S. Budd and Kevin Alan Burkett and Giuseppe Busetto and Peter J. Bussey and Pierfrancesco Butti and Adrian Buzatu and Aristotle Calamba and Stefano Camarda and Mario Campanelli and Florencia Canelli and Benjamin P. Carls and Duncan L. Carlsmith and Rodolfo Carosi and Snaider Carrillo and Bruno Casal and Massimo Casarsa and Alexandre C. Castro and Pierluigi Catastini and D. Cauz and Viviana Cavaliere and Alessandro Cerri and Lucio Cerrito and Y. C. Chen and Maxwell Chertok and Giorgio Chiarelli and Guram Chlachidze and Kilwon Cho and Davit Chokheli and A. R. Clark and C. N. Clarke and M. E. Convery and John M. Conway and M. Corbo and Marco Cordelli and C. A. Cox and D. J. Cox and Matteo Cremonesi and D. Cruz and Javier Cuevas and Russell D. Culbertson and Nicola D'Ascenzo and M. Datta and Pawel de Barbaro and Luc Demortier and Luigi Marchese and M. Deninno and F. Devoto and Marco D'Errico and Angelo Di Canto and Benedetto Di Ruzza and J. R. Dittmann and M. D’onofrio and Simone Donati and Mirco Dorigo and Anna Driutti and Kazuyoshi Ebina and R. C. Edgar and Andrey Elagin and Robin Erbacher and Steven Errede and Benjamin F. Esham and Sinead Farrington and J. P. Fern'andez Ramos and Richard Field and Gerry Flanagan and Ray Forrest and Melissa Franklin and J. C. Freeman and H{\'e}l{\`e}ne Frisch and Yukari Funakoshi and Camilla Galloni and A. F. Garfinkel and P. Garosi and H. Gerberich and E. Gerchtein and Stefano Giagu and Victoria Giakoumopoulou and Karen R. Gibson and C. M. Ginsburg and Nikos Giokaris and Paolo Giromini and Viktor Glagolev and D. Glenzinski and Mark S. Gold and David Goldin and Alexander Golossanov and Gervasio Gomez and Guillelmo Gomez-Ceballos and Maxim Goncharov and O. Gonz'alez L'opez and I. V. Gorelov and A. T. Goshaw and Konstantin Goulianos and Elena Gramellini and Carla Grosso-Pilcher and R. C. Group and J. Guimaraes da Costa and S. R. Hahn and J. Y. Han and Fabio Happacher and Kazusato Hara and Matt Hare and R. F. Harr and Timothy M. Harrington-Taber and Kenichi Hatakeyama and Chris Hays and J M Heinrich and Matthew Herndon and Andrew Hocker and Ziqing Hong and Walter Hopkins and Shaoqi Hou and R. E. Hughes and Ulrich Husemann and Mohammad Hussein and Joey Huston and Gianluca Introzzi and M. Iori and Andrew Ivanov and Eric B. James and Dong Wook Jang and Bodhitha A. Jayatilaka and E. J. Jeon and Sergo Jindariani and Matthew Jones and K. K. Joo and S. Y. Jun and T. R. Junk and Manuel Kambeitz and Teruki Kamon and P. E. Karchin and Azeddine Kasmi and Yukihiro Kariya Kato and Wesley Ketchum and Justin Keung and Benjamin John Kilminster and D. H. Kim and Hyunsook Kim and J. E. Kim and M. J. Kim and S. B. Kim and Sang hwan Kim and Y. K. Kim and Y. J. Kim and Naoki Kimura and M. Kirby and Kyle James Knoepfel and Kunitaka Kondo and D. J. Kong and Jacobo Konigsberg and A. V. Kotwal and Michal Kreps and J D Kroll and M. C. Kruse and Thomas Kuhr and Mitsuo Kurata and A. T. Laasanen and Sebastian Lammel and M. Lancaster and Kevin Lannon and Giuseppe Latino and H. S. Lee and J. S. Lee and Stefano De Leo and Sandra Leone and J. D. Lewis and Antonio Limosani and Elliot David Lipeles and Alison Lister and H. Liu and Q. Liu and Tong Liu and S. Lockwitz and A. N. Loginov and A. Luc{\`a} and Donatella Lucchesi and J. Lueck and Paul Joseph Lujan and Patrick Lukens and Gheorghe Lungu and J. E. A. Lys and Roman Lysak and Robyn Leigh Madrak and P. G{\'o}mez Maestro and S. Malik and Giulia Manca and A. Manousakis-katsikakis and Fabrizio Margaroli and Patricia Marino and Katarzyna Matera and M. E. Mattson and Anna Mazzacane and Paolo Mazzanti and Ronan Mcnulty and Ankita Mehta and Petteri Mehtala and Christina Mesropian and Tianxuan Miao and D. Mietlicki and Anupam Mitra and Hayato Miyake and Shulamit Moed and Niccol{\`o} Moggi and C. S. Moon and Roger Moore and M. J. Morello and Aseet Mukherjee and Th. Muller and Pavel Murat and M. Mussini and Jane Marie Nachtman and Yasuki Nagai and Junji Naganoma and Itsuo Nakano and Austin Napier and Jachen C. Nett and Christopher Neu and Turgun Nigmanov and Lawrence Nodulman and S. Y. Noh and Olga Norniella and Luke Oakes and S. H. Oh and Y. D. Oh and I. Oksuzian and Toru Okusawa and Risto Orava and Lorenzo Ortolan and Carmine Pagliarone and Enrique Palencia and Prabhakar Palni and Vassilis C. Papadimitriou and William Parker and G. Pauletta and Manfred Paulini and Christoph Paus and T. J. Phillips and Giorgia Piacentino and Elisabetta Pianori and Justin Pilot and Kevin Pitts and Charles Plager and L. Pondrom and Stephen Poprocki and Karolos Potamianos and Fedor Prokoshin and Aliaksandr Pranko and Fotios K Ptohos and Giovanni Punzi and Ignacio Fern{\'a}ndez and P. B. Renton and Maria Rescigno and Franco Rimondi and Luciano Ristori and Aidan Robson and Terry Rodr{\'i}guez and Simona Rolli and Manfredi Ronzani and Rok Ro{\vs}er and J. L. Rosner and Fabrizio Ruffini and A. L{\'o}pez Ruiz and James Russ and Viorel Rusu and W. K. Sakumoto and Y. Sakurai and Luciana Santi and Kouki Sato and V. Saveliev and A. Savoy-Navarro and P. Schlabach and E. E. Schmidt and Thomas Andrew Schwarz and Luca Scodellaro and Fabrizio Scuri and Stephan Seidel and Yoshihiro Seiya and Andrei Yu. Semenov and Federico Sforza and S. Z. Shalhout and Tara Shears and P. F. Shepard and Makoto Shimojima and M. J. Shochet and I. Shreyber-Tecker and Aleksandr Simonenko and Krzysztof Sliwa and J. R. Smith and F. D. Snider and Veronica Sorin and Hyeong Yong Song and M. Stancari and R. D. St. Denis and Dale James Stentz and John Strologas and Yuji Sudo and Aleksei Sukhanov and I. A. Suslov and Keizo Takemasa and Yasuaki Takeuchi and Jianchun Tang and Monica Tecchio and P. K. Teng and Julia Thom and E. Gertrude Thomson and Vaikunth Thukral and David Toback and Stanislav Tok{\'a}r and Kirsten Tollefson and T. Tomura and D. Depietri Tonelli and S. Dalla Torre and Domenico Torretta and Pasquale Totaro and M. Trovato and Fumihiko Ukegawa and Satoru Uozumi and Federico V{\'a}zquez and Gueorgui V. Velev and Costas Vellidis and Caterina Vernieri and M V{\'i}ctor Vidal and R. M. Vilar and Jes{\'u}s Viz{\'a}n and Michael Vogel and Guido Volpi and Peter Dr Wagner and Rainer Wallny and S. M. Wang and David D. Waters and W. C. Wester and D. O. Whiteson and A. B. Wicklund and Steve Wilbur and H. H. Williams and J. S. Wilson and Paul Wilson and B. L. Winer and Peter Wittich and Stephen Wolbers and Homer Wolfe and T. Wright and Xin Wu and Zhenbin Wu and Kazuhiro Yamamoto and D. Yamato and T. Yang and U. K. Yang and Y. C. Yang and W-M. Yao and G. P. Yeh and Kai Yi and John G. Nyuot Yoh and Kohei Yorita and Takuo Yoshida and G. B. Yu and Intae Yu and A. M. Zanetti and Yijie Zeng and Chen Zhou and Stefano Zucchelli},
We study charged particle production (pT > 0.5 GeV/c, |η| < 0.8) in proton-antiproton collisions at 300 GeV, 900 GeV, and 1.96 TeV. We use the direction of the charged particle with the largest transverse momentum in each event to define three regions of η-Φspace; “toward”, “away”, and “transverse”. Furthermore, the average number and the average scalar pT sum of charged particles in the transverse region are sensitive to the modeling of the “underlying event”. The transverse region is divided… CONTINUE READING

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