Search for new phenomena in events with two Z bosons and missing transverse momentum in pp¯collisions at s√=1.96 TeV

T Aaltonen,B Alvarez Gonzalez,S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari,J A Appel,T Arisawa,A Artikov,J Asaadi,W Ashmanskas,B Auerbach,A Aurisano, F Azfar,W Badgett, T Bae, A Barbarogaltieri,V E Barnes,B A Barnett,P Barria,P Bartos,M Bauce, F Bedeschi,S Behari, G Bellettini,J Bellinger,D Benjamin, A Beretvas,A Bhatti, D Bisello, I Bizjak,K R Bland,B Blumenfeld, A Bocci,A Bodek,D Bortoletto, J Boudreau, A Boveia, L Brigliadori, C Bromberg,E Brucken,J Budagov,H S Budd, K Burkett, G Busetto, P Bussey,A Buzatu, A Calamba,C Calancha,S Camarda, M Campanelli,M Campbell, F Canelli,B Carls, D Carlsmith,R Carosi,S Carrillo,S Carron,B Casal, M Casarsa,A Castro, P Catastini, D Cauz,V Cavaliere, M Cavallisforza, A Cerri, L Cerrito,Y C Chen, M Chertok,G Chiarelli,G Chlachidze, F Chlebana,K Cho,D Chokheli,W H Chung,Y S Chung,M A Ciocci,Andrew J Clark, C A Clarke,G Compostella,M E Convery,J Conway,M Corbo,M Cordelli, C A Cox,D J Cox, F Crescioli,J Cuevas,R Culbertson,D Dagenhart, N D Ascenzo,M Datta,P De Barbaro,M Dell Orso, L Demortier, M Deninno,F Devoto,M D Errico,A Di Canto,B Di Ruzza,J R Dittmann, M D Onofrio, S Donati,Ping Dong,M Dorigo, T Dorigo,K Ebina,A Elagin,A Eppig, R Erbacher, S Errede,N Ershaidat, R Eusebi,Sinead Farrington, M Feindt,J P Fernandez,R C Field, G Flanagan,R Forrest, M Frank, M Franklin, J Freeman,Y Funakoshi, I Furic, M Gallinaro,J E Garcia, A F Garfinkel,P Garosi,H Gerberich,E Gerchtein, S Giagu, V Giakoumopoulou, P Giannetti,K Gibson,C M Ginsburg, N Giokaris,P Giromini, G Giurgiu,V Glagolev,D Glenzinski,M Gold, D Goldin,N Goldschmidt,A Golossanov,G Gomez, G Gomezceballos,M Goncharov,O Gonzalez,I Gorelov,A T Goshaw, K Goulianos, S Grinstein,C Grossopilcher,J Guimaraes Da Costa, S R Hahn, E Halkiadakis,A Hamaguchi,J Y Han,F Happacher, K Hara,D Hare,M Hare, R F Harr, K Hatakeyama,C Hays,M Heck,J Heinrich,M Herndon, S Hewamanage,A Hocker, W Hopkins, David M Horn, S Hou,R E Hughes,M Hurwitz,U Husemann,N Hussain,M Hussein, J Huston, G Introzzi,M Iori,Andrew Ivanov, E James,D Jang,B Jayatilaka,E J Jeon, S Jindariani,M Jones,K K Joo, S Y Jun, T R Junk,T Kamon, P E Karchin, Azeddine Kasmi,Y Kato,W Ketchum,J Keung, V Khotilovich, B Kilminster,D H Kim,Hyung Sik Kim,J E Kim,M J Kim,S H Kim,Yu Kyeong Kim, N Kimura,M H Kirby,S Klimenko,K J Knoepfel,K Kondo, D J Kong,J Konigsberg, A V Kotwal,M Kreps, J Kroll,D Krop, M Kruse, V Krutelyov, T Kuhr, M Kurata,S Kwang, A T Laasanen,S Lami,S Lammel,M Lancaster,R Lander,K Lannon, A Lath,G Latino, T Lecompte,Eun Lee,H S Lee,J S Lee,S W Lee,S Leo, S Leone,J D Lewis, A Limosani,C J Lin,M Lindgren, E Lipeles,A Lister,D O Litvintsev, C Liu,Huan Liu,Qian Liu,Tieqiao Liu,S Lockwitz, A Loginov,D Lucchesi,J Lueck, P Lujan,P Lukens, G Lungu,J Lys,R Lysak,R Madrak, K Maeshima, P Maestro, S Malik,G Manca, A Manousakiskatsikakis,F Margaroli, C P Marino, M Martinez,P Mastrandrea, K Matera,M E Mattson,A Mazzacane,P Mazzanti,K S Mcfarland,P Mcintyre,R Mcnulty,Andrew Mehta,P Mehtala, C Mesropian, T Miao,D Mietlicki,A Mitra,H Miyake,S Moed,N Moggi,M N Mondragon,C S Moon,R Moore,M J Morello,J Morlock,P Movilla Fernandez,A Mukherjee,Th Muller,P Murat,M Mussini, J Nachtman,Yuki Nagai,J Naganoma, I Nakano,A Napier,J Nett, C Neu, M S Neubauer,Jason Nielsen, L Nodulman,S Y Noh,O Norniella,L Oakes, S H Oh, Y D Oh,I Oksuzian,T Okusawa, R Orava,L Ortolan,S Pagan Griso,C Pagliarone,E Palencia,V Papadimitriou, A A Paramonov,J Patrick,G Pauletta, M Paulini, C Paus,D Pellett, A Penzo,T J Phillips,G Piacentino,E Pianori,J Pilot, K Pitts, C Plager,L Pondrom,S Poprocki,K Potamianos, F Prokoshin,A Pranko,F Ptohos, G Punzi,A Rahaman, Vanitha Ramakrishnan,N Ranjan, I Redondo,P Renton, M Rescigno,T Riddick,F Rimondi, L Ristori, A Robson, T Rodrigo,T Rodriguez,E Rogers, S Rolli, R Roser,F Ruffini, Anabel Hernandez Ruiz,J Russ,V Rusu,A Safonov,W K Sakumoto,Y Sakurai,L Santi,K Sato,V Saveliev, A Savoynavarro,P Schlabach, Annette M Schmidt,E E Schmidt, T Schwarz, L Scodellaro, A Scribano, F Scuri, S Seidel, Y Seiya,A Semenov,F Sforza,S Z Shalhout,T Shears,P F Shepard, M Shimojima, M Shochet,I Shreybertecker,A Simonenko, P Sinervo,K Sliwa,John R Smith,F D Snider, A Soha,V Sorin, H Song, P Squillacioti,M Stancari,R St Denis, B Stelzer, O Stelzerchilton,D Stentz, J Strologas, G L Strycker,Y Sudo, A A Sukhanov,I Suslov,K Takemasa,Y Takeuchi,Jinhui Tang,M Tecchio, P K Teng,J Thom,J Thome,G A Thompson,E Thomson, D Toback, S Tokar, K Tollefson,T Tomura,D Tonelli,S Torre,D Torretta,P Totaro,M Trovato, F Ukegawa,S Uozumi,A Varganov,F Vazquez,Juan Carlos Vasquez,G Velev,C Vellidis,M Vidal, I Vila,R Vilar, J Vizan,M Vogel,G Volpi,P Wagner,R L Wagner,T Wakisaka,R Wallny, S M Wang, A Warburton, D Waters,W C Wester, D Whiteson,A B Wicklund, E Wicklund,S Wilbur,F Wick,H H Williams, J S Wilson,P Wilson, B L Winer, P Wittich,S Wolbers,H Wolfe,Timothy M Wright,Xifeng Wu,Z Wu,K Yamamoto, D Yamato,T Yang,U K Yang,Y C Yang,W M Yao,G P Yeh, K Yi,J Yoh, K Yorita,Tsuyoshi Yoshida, G B Yu, I Yu,S S Yu, J C Yun, A Zanetti,Yong Zeng,C Zhou,S Zucchelli

PHYSICAL REVIEW D（2012）

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摘要

We present a search for new phenomena in events with two reconstructed Z bosons and large missing transverse momentum, sensitive to processes p (p) over bar -> X2X2 -> ZZX(1)X(1), where X-2 is an unstable particle decaying as X-2 -> ZX(1) and X-1 is undetected. The particles X-1 and X-2 may be, among other possibilities, fourth-generation neutrinos or supersymmetric particles. We study the final state in which one Z boson decays to two charged leptons and the second decays hadronically. In data corresponding to an integrated luminosity of 4.2 fb(-1) from proton-antiproton collisions recorded by the CDF II detector at the Tevatron, with center-of-mass energy of 1.96 TeV, we find agreement between data and standard-model backgrounds. We calculate 95% confidence level upper limits on the cross section of the process p (p) over bar -> X2X2 -> ZZX(1)X(1) ranging from 50 fb to 1 pb, depending on the masses of X-1 and X-2.

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Bildung,Library science,Slovak,Particle physics,Physics,Basic research,Christian ministry,Research council,Transverse momentum

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