Search for the flavor-changing neutral-current decay t-->Zq in pp collisions at sqrt[s] = 1.96 TeV

T Aaltonen; J Adelman; T Akimoto; M G Albrow; B Alvarez González; S Amerio; D Amidei; A Anastassov; A Annovi; J Antos; G Apollinari; A Apresyan; T Arisawa; A Artikov; W Ashmanskas; A Attal; A Aurisano; F Azfar; P Azzurri; W Badgett; A Barbaro-Galtieri; V E Barnes; B A Barnett; V Bartsch; G Bauer; P-H Beauchemin; F Bedeschi; P Bednar; D Beecher; S Behari; G Bellettini; J Bellinger; D Benjamin; A Beretvas; J Beringer; A Bhatti; M Binkley; D Bisello; I Bizjak; R E Blair; C Blocker; B Blumenfeld; A Bocci; A Bodek; V Boisvert; G Bolla; D Bortoletto; J Boudreau; A Boveia; B Brau; A Bridgeman; L Brigliadori; C Bromberg; E Brubaker; J Budagov; H S Budd; S Budd; K Burkett; G Busetto; P Bussey; A Buzatu; K L Byrum; S Cabrera; C Calancha; M Campanelli; M Campbell; F Canelli; A Canepa; D Carlsmith; R Carosi; S Carrillo; S Carron; B Casal; M Casarsa; A Castro; P Catastini; D Cauz; V Cavaliere; M Cavalli-Sforza; A Cerri; L Cerrito; S H Chang; Y C Chen; M Chertok; G Chiarelli; G Chlachidze; F Chlebana; K Cho; D Chokheli; J P Chou; G Choudalakis; S H Chuang; K Chung; W H Chung; Y S Chung; C I Ciobanu; M A Ciocci; A Clark; D Clark; G Compostella; M E Convery; J Conway; K Copic; M Cordelli; G Cortiana; D J Cox; F Crescioli; C Cuenca Almenar; J Cuevas; R Culbertson; J C Cully; D Dagenhart; M Datta; T Davies; P de Barbaro; S De Cecco; A Deisher; G De Lorenzo; M Dell'Orso; C Deluca; L Demortier; J Deng; M Deninno; P F Derwent; G P di Giovanni; C Dionisi; B Di Ruzza; J R Dittmann; M D'Onofrio; S Donati; P Dong; J Donini; T Dorigo; S Dube; J Efron; A Elagin; R Erbacher; D Errede; S Errede; R Eusebi; H C Fang; S Farrington; W T Fedorko; R G Feild; M Feindt; J P Fernandez; C Ferrazza; R Field; G Flanagan; R Forrest; M Franklin; J C Freeman; I Furic; M Gallinaro; J Galyardt; F Garberson; J E Garcia; A F Garfinkel; K Genser; H Gerberich; D Gerdes; A Gessler; S Giagu; V Giakoumopoulou; P Giannetti; K Gibson; J L Gimmell; C M Ginsburg; N Giokaris; M Giordani; P Giromini; M Giunta; G Giurgiu; V Glagolev; D Glenzinski; M Gold; N Goldschmidt; A Golossanov; G Gomez; G Gomez-Ceballos; M Goncharov; O González; I Gorelov; A T Goshaw; K Goulianos; A Gresele; S Grinstein; C Grosso-Pilcher; U Grundler; J Guimaraes da Costa; Z Gunay-Unalan; C Haber; K Hahn; S R Hahn; E Halkiadakis; B-Y Han; J Y Han; R Handler; F Happacher; K Hara; D Hare; M Hare; S Harper; R F Harr; R M Harris; M Hartz; K Hatakeyama; J Hauser; C Hays; M Heck; A Heijboer; B Heinemann; J Heinrich; C Henderson; M Herndon; J Heuser; S Hewamanage; D Hidas; C S Hill; D Hirschbuehl; A Hocker; S Hou; M Houlden; S-C Hsu; B T Huffman; R E Hughes; U Husemann; J Huston; J Incandela; G Introzzi; M Iori; A Ivanov; E James; B Jayatilaka; E J Jeon; M K Jha; S Jindariani; W Johnson; M Jones; K K Joo; S Y Jun; J E Jung; T R Junk; T Kamon; D Kar; P E Karchin; Y Kato; R Kephart; J Keung; V Khotilovich; B Kilminster; D H Kim; H S Kim; J E Kim; M J Kim; S B Kim; S H Kim; Y K Kim; N Kimura; L Kirsch; S Klimenko; B Knuteson; B R Ko; S A Koay; K Kondo; D J Kong; J Konigsberg; A Korytov; A V Kotwal; M Kreps; J Kroll; D Krop; N Krumnack; M Kruse; V Krutelyov; T Kubo; T Kuhr; N P Kulkarni; M Kurata; Y Kusakabe; S Kwang; A T Laasanen; S Lami; S Lammel; M Lancaster; R L Lander; K Lannon; A Lath; G Latino; I Lazzizzera; T LeCompte; E Lee; S W Lee; S Leone; J D Lewis; C S Lin; J Linacre; M Lindgren; E Lipeles; A Lister; D O Litvintsev; C Liu; T Liu; N S Lockyer; A Loginov; M Loreti; L Lovas; R-S Lu; D Lucchesi; J Lueck; C Luci; P Lujan; P Lukens; G Lungu; L Lyons; J Lys; R Lysak; E Lytken; P Mack; D MacQueen; R Madrak; K Maeshima; K Makhoul; T Maki; P Maksimovic; S Malde; S Malik; G Manca; A Manousakis-Katsikakis; F Margaroli; C Marino; C P Marino; A Martin; V Martin; M Martínez; R Martínez-Ballarín; T Maruyama; P Mastrandrea; T Masubuchi; M E Mattson; P Mazzanti; K S McFarland; P McIntyre; R McNulty; A Mehta; P Mehtala; A Menzione; P Merkel; C Mesropian; T Miao; N Miladinovic; R Miller; C Mills; M Milnik; A Mitra; G Mitselmakher; H Miyake; N Moggi; C S Moon; R Moore; M J Morello; J Morlok; P Movilla Fernandez; J Mülmenstädt; A Mukherjee; Th Muller; R Mumford; P Murat; M Mussini; J Nachtman; Y Nagai; A Nagano; J Naganoma; K Nakamura; I Nakano; A Napier; V Necula; C Neu; M S Neubauer; J Nielsen; L Nodulman; M Norman; O Norniella; E Nurse; L Oakes; S H Oh; Y D Oh; I Oksuzian; T Okusawa; R Orava; K Osterberg; S Pagan Griso; C Pagliarone; E Palencia; V Papadimitriou; A Papaikonomou; A A Paramonov; B Parks; S Pashapour; J Patrick; G Pauletta; M Paulini; C Paus; D E Pellett; A Penzo; T J Phillips; G Piacentino; E Pianori; L Pinera; K Pitts; C Plager; L Pondrom; O Poukhov; N Pounder; F Prakoshyn; A Pronko; J Proudfoot; F Ptohos; E Pueschel; G Punzi; J Pursley; J Rademacker; A Rahaman; V Ramakrishnan; N Ranjan; I Redondo; B Reisert; V Rekovic; P Renton; M Rescigno; S Richter; F Rimondi; L Ristori; A Robson; T Rodrigo; T Rodriguez; E Rogers; S Rolli; R Roser; M Rossi; R Rossin; P Roy; A Ruiz; J Russ; V Rusu; H Saarikko; A Safonov; W K Sakumoto; O Saltó; D Saltzberg; L Santi; S Sarkar; L Sartori; K Sato; A Savoy-Navarro; T Scheidle; P Schlabach; A Schmidt; E E Schmidt; M A Schmidt; M P Schmidt; M Schmitt; T Schwarz; L Scodellaro; A L Scott; A Scribano; F Scuri; A Sedov; S Seidel; Y Seiya; A Semenov; L Sexton-Kennedy; A Sfyrla; S Z Shalhout; T Shears; P F Shepard; D Sherman; M Shimojima; S Shiraishi; M Shochet; Y Shon; I Shreyber; A Sidoti; P Sinervo; A Sisakyan; A J Slaughter; J Slaunwhite; K Sliwa; J R Smith; F D Snider; R Snihur; A Soha; S Somalwar; V Sorin; J Spalding; T Spreitzer; P Squillacioti; M Stanitzki; R St Denis; B Stelzer; O Stelzer-Chilton; D Stentz; J Strologas; D Stuart; J S Suh; A Sukhanov; M Sutherland; I Suslov; T Suzuki; A Taffard; R Takashima; Y Takeuchi; R Tanaka; M Tecchio; P K Teng; K Terashi; J Thom; A S Thompson; G A Thompson; E Thomson; P Tipton; V Tiwari; S Tkaczyk; D Toback; S Tokar; K Tollefson; T Tomura; D Tonelli; S Torre; D Torretta; P Totaro; S Tourneur; Y Tu; N Turini; F Ukegawa; S Vallecorsa; N van Remortel; A Varganov; E Vataga; F Vázquez; G Velev; C Vellidis; V Veszpremi; M Vidal; R Vidal; I Vila; R Vilar; T Vine; M Vogel; I Volobouev; G Volpi; F Würthwein; P Wagner; R G Wagner; R L Wagner; J Wagner-Kuhr; W Wagner; T Wakisaka; R Wallny; S M Wang; A Warburton; D Waters; M Weinberger; W C Wester 3rd; B Whitehouse; D Whiteson; A B Wicklund; E Wicklund; G Williams; H H Williams; P Wilson; B L Winer; P Wittich; S Wolbers; C Wolfe; T Wright; X Wu; S M Wynne; A Yagil; K Yamamoto; J Yamaoka; U K Yang; Y C Yang; W M Yao; G P Yeh; J Yoh; K Yorita; T Yoshida; G B Yu; I Yu; S S Yu; J C Yun; L Zanello; A Zanetti; I Zaw; X Zhang; Y Zheng; S Zucchelli; CDF Collaboration

doi:10.1103/PhysRevLett.101.192002

Search for the flavor-changing neutral-current decay t-->Zq in pp collisions at sqrt[s] = 1.96 TeV

Phys Rev Lett. 2008 Nov 7;101(19):192002. doi: 10.1103/PhysRevLett.101.192002. Epub 2008 Nov 7.

Authors

T Aaltonen¹, J Adelman, T Akimoto, M G Albrow, B Alvarez González, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, A Apresyan, T Arisawa, A Artikov, W Ashmanskas, A Attal, A Aurisano, F Azfar, P Azzurri, W Badgett, A Barbaro-Galtieri, V E Barnes, B A Barnett, V Bartsch, G Bauer, P-H Beauchemin, F Bedeschi, P Bednar, D Beecher, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, J Beringer, A Bhatti, M Binkley, D Bisello, I Bizjak, R E Blair, C Blocker, B Blumenfeld, A Bocci, A Bodek, V Boisvert, G Bolla, D Bortoletto, J Boudreau, A Boveia, B Brau, A Bridgeman, L Brigliadori, C Bromberg, E Brubaker, J Budagov, H S Budd, S Budd, K Burkett, G Busetto, P Bussey, A Buzatu, K L Byrum, S Cabrera, C Calancha, M Campanelli, M Campbell, F Canelli, A Canepa, D Carlsmith, R Carosi, S Carrillo, S Carron, B Casal, M Casarsa, A Castro, P Catastini, D Cauz, V Cavaliere, M Cavalli-Sforza, A Cerri, L Cerrito, S H Chang, Y C Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, K Cho, D Chokheli, J P Chou, G Choudalakis, S H Chuang, K Chung, W H Chung, Y S Chung, C I Ciobanu, M A Ciocci, A Clark, D Clark, G Compostella, M E Convery, J Conway, K Copic, M Cordelli, G Cortiana, D J Cox, F Crescioli, C Cuenca Almenar, J Cuevas, R Culbertson, J C Cully, D Dagenhart, M Datta, T Davies, P de Barbaro, S De Cecco, A Deisher, G De Lorenzo, M Dell'Orso, C Deluca, L Demortier, J Deng, M Deninno, P F Derwent, G P di Giovanni, C Dionisi, B Di Ruzza, J R Dittmann, M D'Onofrio, S Donati, P Dong, J Donini, T Dorigo, S Dube, J Efron, A Elagin, R Erbacher, D Errede, S Errede, R Eusebi, H C Fang, S Farrington, W T Fedorko, R G Feild, M Feindt, J P Fernandez, C Ferrazza, R Field, G Flanagan, R Forrest, M Franklin, J C Freeman, I Furic, M Gallinaro, J Galyardt, F Garberson, J E Garcia, A F Garfinkel, K Genser, H Gerberich, D Gerdes, A Gessler, S Giagu, V Giakoumopoulou, P Giannetti, K Gibson, J L Gimmell, C M Ginsburg, N Giokaris, M Giordani, P Giromini, M Giunta, G Giurgiu, V Glagolev, D Glenzinski, M Gold, N Goldschmidt, A Golossanov, G Gomez, G Gomez-Ceballos, M Goncharov, O González, I Gorelov, A T Goshaw, K Goulianos, A Gresele, S Grinstein, C Grosso-Pilcher, U Grundler, J Guimaraes da Costa, Z Gunay-Unalan, C Haber, K Hahn, S R Hahn, E Halkiadakis, B-Y Han, J Y Han, R Handler, F Happacher, K Hara, D Hare, M Hare, S Harper, R F Harr, R M Harris, M Hartz, K Hatakeyama, J Hauser, C Hays, M Heck, A Heijboer, B Heinemann, J Heinrich, C Henderson, M Herndon, J Heuser, S Hewamanage, D Hidas, C S Hill, D Hirschbuehl, A Hocker, S Hou, M Houlden, S-C Hsu, B T Huffman, R E Hughes, U Husemann, J Huston, J Incandela, G Introzzi, M Iori, A Ivanov, E James, B Jayatilaka, E J Jeon, M K Jha, S Jindariani, W Johnson, M Jones, K K Joo, S Y Jun, J E Jung, T R Junk, T Kamon, D Kar, P E Karchin, Y Kato, R Kephart, J Keung, V Khotilovich, B Kilminster, D H Kim, H S Kim, J E Kim, M J Kim, S B Kim, S H Kim, Y K Kim, N Kimura, L Kirsch, S Klimenko, B Knuteson, B R Ko, S A Koay, K Kondo, D J Kong, J Konigsberg, A Korytov, A V Kotwal, M Kreps, J Kroll, D Krop, N Krumnack, M Kruse, V Krutelyov, T Kubo, T Kuhr, N P Kulkarni, M Kurata, Y Kusakabe, S Kwang, A T Laasanen, S Lami, S Lammel, M Lancaster, R L Lander, K Lannon, A Lath, G Latino, I Lazzizzera, T LeCompte, E Lee, S W Lee, S Leone, J D Lewis, C S Lin, J Linacre, M Lindgren, E Lipeles, A Lister, D O Litvintsev, C Liu, T Liu, N S Lockyer, A Loginov, M Loreti, L Lovas, R-S Lu, D Lucchesi, J Lueck, C Luci, P Lujan, P Lukens, G Lungu, L Lyons, J Lys, R Lysak, E Lytken, P Mack, D MacQueen, R Madrak, K Maeshima, K Makhoul, T Maki, P Maksimovic, S Malde, S Malik, G Manca, A Manousakis-Katsikakis, F Margaroli, C Marino, C P Marino, A Martin, V Martin, M Martínez, R Martínez-Ballarín, T Maruyama, P Mastrandrea, T Masubuchi, M E Mattson, P Mazzanti, K S McFarland, P McIntyre, R McNulty, A Mehta, P Mehtala, A Menzione, P Merkel, C Mesropian, T Miao, N Miladinovic, R Miller, C Mills, M Milnik, A Mitra, G Mitselmakher, H Miyake, N Moggi, C S Moon, R Moore, M J Morello, J Morlok, P Movilla Fernandez, J Mülmenstädt, A Mukherjee, Th Muller, R Mumford, P Murat, M Mussini, J Nachtman, Y Nagai, A Nagano, J Naganoma, K Nakamura, I Nakano, A Napier, V Necula, C Neu, M S Neubauer, J Nielsen, L Nodulman, M Norman, O Norniella, E Nurse, L Oakes, S H Oh, Y D Oh, I Oksuzian, T Okusawa, R Orava, K Osterberg, S Pagan Griso, C Pagliarone, E Palencia, V Papadimitriou, A Papaikonomou, A A Paramonov, B Parks, S Pashapour, J Patrick, G Pauletta, M Paulini, C Paus, D E Pellett, A Penzo, T J Phillips, G Piacentino, E Pianori, L Pinera, K Pitts, C Plager, L Pondrom, O Poukhov, N Pounder, F Prakoshyn, A Pronko, J Proudfoot, F Ptohos, E Pueschel, G Punzi, J Pursley, J Rademacker, A Rahaman, V Ramakrishnan, N Ranjan, I Redondo, B Reisert, V Rekovic, P Renton, M Rescigno, S Richter, F Rimondi, L Ristori, A Robson, T Rodrigo, T Rodriguez, E Rogers, S Rolli, R Roser, M Rossi, R Rossin, P Roy, A Ruiz, J Russ, V Rusu, H Saarikko, A Safonov, W K Sakumoto, O Saltó, D Saltzberg, L Santi, S Sarkar, L Sartori, K Sato, A Savoy-Navarro, T Scheidle, P Schlabach, A Schmidt, E E Schmidt, M A Schmidt, M P Schmidt, M Schmitt, T Schwarz, L Scodellaro, A L Scott, A Scribano, F Scuri, A Sedov, S Seidel, Y Seiya, A Semenov, L Sexton-Kennedy, A Sfyrla, S Z Shalhout, T Shears, P F Shepard, D Sherman, M Shimojima, S Shiraishi, M Shochet, Y Shon, I Shreyber, A Sidoti, P Sinervo, A Sisakyan, A J Slaughter, J Slaunwhite, K Sliwa, J R Smith, F D Snider, R Snihur, A Soha, S Somalwar, V Sorin, J Spalding, T Spreitzer, P Squillacioti, M Stanitzki, R St Denis, B Stelzer, O Stelzer-Chilton, D Stentz, J Strologas, D Stuart, J S Suh, A Sukhanov, M Sutherland, I Suslov, T Suzuki, A Taffard, R Takashima, Y Takeuchi, R Tanaka, M Tecchio, P K Teng, K Terashi, J Thom, A S Thompson, G A Thompson, E Thomson, P Tipton, V Tiwari, S Tkaczyk, D Toback, S Tokar, K Tollefson, T Tomura, D Tonelli, S Torre, D Torretta, P Totaro, S Tourneur, Y Tu, N Turini, F Ukegawa, S Vallecorsa, N van Remortel, A Varganov, E Vataga, F Vázquez, G Velev, C Vellidis, V Veszpremi, M Vidal, R Vidal, I Vila, R Vilar, T Vine, M Vogel, I Volobouev, G Volpi, F Würthwein, P Wagner, R G Wagner, R L Wagner, J Wagner-Kuhr, W Wagner, T Wakisaka, R Wallny, S M Wang, A Warburton, D Waters, M Weinberger, W C Wester 3rd, B Whitehouse, D Whiteson, A B Wicklund, E Wicklund, G Williams, H H Williams, P Wilson, B L Winer, P Wittich, S Wolbers, C Wolfe, T Wright, X Wu, S M Wynne, A Yagil, K Yamamoto, J Yamaoka, U K Yang, Y C Yang, W M Yao, G P Yeh, J Yoh, K Yorita, T Yoshida, G B Yu, I Yu, S S Yu, J C Yun, L Zanello, A Zanetti, I Zaw, X Zhang, Y Zheng, S Zucchelli; CDF Collaboration

Affiliation

¹ Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland.

PMID: 19113262
DOI: 10.1103/PhysRevLett.101.192002

Abstract

We report a search for the flavor-changing neutral-current decay of the top quark t-->Zq (q=u, c) in pp collisions at sqrt[s]=1.96 TeV using a data sample corresponding to an integrated luminosity of 1.9 fb(-1) collected by the CDF II detector. This decay is strongly suppressed in the standard model and an observation of a signal at the Fermilab Tevatron would be an indication of physics beyond the standard model. Using Z+ > or = 4 jet final state candidate events, with and without an identified bottom quark jet, we obtain an upper limit of B(t-->Zq) < 3.7% at 95% C.L.