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dc.contributor.authorXie, Si
dc.contributor.authorKnuteson, Bruce O.
dc.contributor.authorHenderson, C.
dc.contributor.authorHahn, Kristian Allan
dc.contributor.authorGomez-Ceballos, Guillelmo
dc.contributor.authorChoudalakis, Georgios
dc.contributor.authorPaus, Christoph M. E.
dc.contributor.authorMakhoul, Khaldoun
dc.contributor.authorGoncharov, Maxim
dc.contributor.authorBauer, Gerry P
dc.date.accessioned2010-02-26T19:35:40Z
dc.date.available2010-02-26T19:35:40Z
dc.date.issued2009-09
dc.date.submitted2009-05
dc.identifier.issn1550-2368
dc.identifier.issn1550-7998
dc.identifier.urihttp://hdl.handle.net/1721.1/51837
dc.description.abstractWe have used the Collider Detector at Fermilab (CDF-II) to search for the flavor-changing neutral-current (FCNC) top-quark decay t→Zc using a technique employing ratios of W and Z production, measured in pp̅ data corresponding to an integrated luminosity of 1.52  fb[superscript -1]. The analysis uses a comparison of two decay chains, pp̅ →tt̅ →WbWb→ℓνbjjb and pp̅ →tt̅ →ZcWb→ℓℓcjjb, to cancel systematic uncertainties in acceptance, efficiency, and luminosity. We validate the modeling of acceptance and efficiency for lepton identification over the multiyear data set using another ratio of W and Z production, in this case the observed ratio of inclusive production of W to Z bosons. To improve the discrimination against standard model backgrounds to top-quark decays, we calculate the top-quark mass for each event with two leptons and four jets assuming it is a tt̅ event with one of the top quarks decaying to Zc. For additional background discrimination we require at least one jet to be identified as originating from a b quark. No significant signal is found and we set an upper limit on the FCNC branching ratio Br(t→Zc) using a likelihood constructed from the ℓℓcjjb top-quark mass distribution and the number of ℓνbjjb events. Limits are set as a function of the helicity of the Z boson produced in the FCNC decay. For 100% longitudinally-polarized Z bosons we find limits of 8.3% and 9.3% (95% C.L.) depending on the assumptions regarding the theoretical top-quark pair production cross section.en
dc.description.sponsorshipAcademy of Finlanden
dc.description.sponsorshipSlovak R&D Agencyen
dc.description.sponsorshipPrograma Consolider-Ingenio 2010, Spainen
dc.description.sponsorshipMinisterio de Ciencia e Innovación, Spainen
dc.description.sponsorshipRussian Foundation for Basic Researchen
dc.description.sponsorshipInstitut National de Physique Nucleaire et Physique des Particules/CNRSen
dc.description.sponsorshipRoyal Society, United Kingdomen
dc.description.sponsorshipScience and Technology Facilities Council, United Kingdomen
dc.description.sponsorshipKorean Research Foundationen
dc.description.sponsorshipKorean Science and Engineering Foundationen
dc.description.sponsorshipBundesministerium für Bildung und Forschung, Germanyen
dc.description.sponsorshipAlfred P. Sloan Foundationen
dc.description.sponsorshipSwiss National Science Foundationen
dc.description.sponsorshipNational Science Council of the Republic of Chinaen
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canadaen
dc.description.sponsorshipMinistry of Education, Culture, Sports, Science and Technology of Japanen
dc.description.sponsorshipItalian Istituto Nazionale di Fisica Nucleareen
dc.description.sponsorshipNational Science Foundationen
dc.description.sponsorshipUnited States Department of Energyen
dc.language.isoen_US
dc.publisherAmerican Physical Societyen
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevD.80.052001en
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en
dc.sourceAPSen
dc.titleSearch for the neutral current top quark decay t-->Zc using the ratio of Z-boson+4 jets to W-boson+4 jets productionen
dc.title.alternativeSearch for the neutral current top quark decay t→Zc using the ratio of Z-boson+4  jets to W-boson+4 jets productionen
dc.typeArticleen
dc.identifier.citationCDF Collaboration et al. “Search for the neutral current top quark decay t-->Zc using the ratio of Z-boson+4 jets to W-boson+4 jets production.” Physical Review D 80.5 (2009): 052001. © 2009 The American Physical Societyen
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.departmentMassachusetts Institute of Technology. Laboratory for Nuclear Scienceen_US
dc.contributor.approverPaus, Christoph M. E.
dc.contributor.mitauthorXie, Si
dc.contributor.mitauthorMakhoul, K.
dc.contributor.mitauthorKnuteson, Bruce O.
dc.contributor.mitauthorHenderson, C.
dc.contributor.mitauthorHahn, Kristian Allan
dc.contributor.mitauthorGoncharov, M.
dc.contributor.mitauthorGomez-Ceballos, Guillelmo
dc.contributor.mitauthorChoudalakis, Georgios
dc.contributor.mitauthorBauer, Gerry P.
dc.contributor.mitauthorPaus, Christoph M. E.
dc.relation.journalPhysical Review Den
dc.eprint.versionFinal published versionen
dc.type.urihttp://purl.org/eprint/type/JournalArticleen
eprint.statushttp://purl.org/eprint/status/PeerRevieweden
dspace.orderedauthorsAaltonen, T.; Adelman, J.; Akimoto, T.; Álvarez González, B.; Amerio, S.; Amidei, D.; Anastassov, A.; Annovi, A.; Antos, J.; Apollinari, G.; Apresyan, A.; Arisawa, T.; Artikov, A.; Ashmanskas, W.; Attal, A.; Aurisano, A.; Azfar, F.; Azzurri, P.; Badgett, W.; Barbaro-Galtieri, A.; Barnes, V.; Barnett, B.; Bartsch, V.; Bauer, G.; Beauchemin, P.-H.; Bedeschi, F.; Beecher, D.; Behari, S.; Bellettini, G.; Bellinger, J.; Benjamin, D.; Beretvas, A.; Beringer, J.; Bhatti, A.; Binkley, M.; Bisello, D.; Bizjak, I.; Blair, R.; Blocker, C.; Blumenfeld, B.; Bocci, A.; Bodek, A.; Boisvert, V.; Bolla, G.; Bortoletto, D.; Boudreau, J.; Boveia, A.; Brau, B.; Bridgeman, A.; Brigliadori, L.; Bromberg, C.; Brubaker, E.; Budagov, J.; Budd, H.; Budd, S.; Burke, S.; Burkett, K.; Busetto, G.; Bussey, P.; Buzatu, A.; Byrum, K.; Cabrera, S.; Calancha, C.; Campanelli, M.; Campbell, M.; Canelli, F.; Canepa, A.; Carls, B.; Carlsmith, D.; Carosi, R.; Carrillo, S.; Carron, S.; Casal, B.; Casarsa, M.; Castro, A.; Catastini, P.; Cauz, D.; Cavaliere, V.; Cavalli-Sforza, M.; Cerri, A.; Cerrito, L.; Chang, S.; Chen, Y.; Chertok, M.; Chiarelli, G.; Chlachidze, G.; Chlebana, F.; Cho, K.; Chokheli, D.; Chou, J.; Choudalakis, G.; Chuang, S.; Chung, K.; Chung, W.; Chung, Y.; Chwalek, T.; Ciobanu, C.; Ciocci, M.; Clark, A.; Clark, D.; Compostella, G.; Convery, M.; Conway, J.; Cordelli, M.; Cortiana, G.; Cox, C.; Cox, D.; Crescioli, F.; Cuenca Almenar, C.; Cuevas, J.; Culbertson, R.; Cully, J.; Dagenhart, D.; Datta, M.; Davies, T.; de Barbaro, P.; De Cecco, S.; Deisher, A.; De Lorenzo, G.; Dell’Orso, M.; Deluca, C.; Demortier, L.; Deng, J.; Deninno, M.; Derwent, P.; di Giovanni, G.; Dionisi, C.; Di Ruzza, B.; Dittmann, J.; D’Onofrio, M.; Donati, S.; Dong, P.; Donini, J.; Dorigo, T.; Dube, S.; Efron, J.; Elagin, A.; Erbacher, R.; Errede, D.; Errede, S.; Eusebi, R.; Fang, H.; Farrington, S.; Fedorko, W.; Feild, R.; Feindt, M.; Fernandez, J.; Ferrazza, C.; Field, R.; Flanagan, G.; Forrest, R.; Frank, M.; Franklin, M.; Freeman, J.; Frisch, H.; Furic, I.; Gallinaro, M.; Galyardt, J.; Garberson, F.; Garcia, J.; Garfinkel, A.; Genser, K.; Gerberich, H.; Gerdes, D.; Gessler, A.; Giagu, S.; Giakoumopoulou, V.; Giannetti, P.; Gibson, K.; Gimmell, J.; Ginsburg, C.; Giokaris, N.; Giordani, M.; Giromini, P.; Giunta, M.; Giurgiu, G.; Glagolev, V.; Glenzinski, D.; Gold, M.; Goldschmidt, N.; Golossanov, A.; Gomez, G.; Gomez-Ceballos, G.; Goncharov, M.; González, O.; Gorelov, I.; Goshaw, A.; Goulianos, K.; Gresele, A.; Grinstein, S.; Grosso-Pilcher, C.; Group, R.; Grundler, U.; Guimaraes da Costa, J.; Gunay-Unalan, Z.; Haber, C.; Hahn, K.; Hahn, S.; Halkiadakis, E.; Han, B.-Y.; Han, J.; Happacher, F.; Hara, K.; Hare, D.; Hare, M.; Harper, S.; Harr, R.; Harris, R.; Hartz, M.; Hatakeyama, K.; Hays, C.; Heck, M.; Heijboer, A.; Heinemann, B.; Heinrich, J.; Henderson, C.; Herndon, M.; Heuser, J.; Hewamanage, S.; Hidas, D.; Hill, C.; Hirschbuehl, D.; Hocker, A.; Hou, S.; Houlden, M.; Hsu, S.-C.; Huffman, B.; Hughes, R.; Husemann, U.; Hussein, M.; Huston, J.; Incandela, J.; Introzzi, G.; Iori, M.; Ivanov, A.; James, E.; Jang, D.; Jayatilaka, B.; Jeon, E.; Jha, M.; Jindariani, S.; Johnson, W.; Jones, M.; Joo, K.; Jun, S.; Jung, J.; Junk, T.; Kamon, T.; Kar, D.; Karchin, P.; Kato, Y.; Kephart, R.; Keung, J.; Khotilovich, V.; Kilminster, B.; Kim, D.; Kim, H.; Kim, H.; Kim, J.; Kim, M.; Kim, S.; Kim, S.; Kim, Y.; Kimura, N.; Kirsch, L.; Klimenko, S.; Knuteson, B.; Ko, B.; Kondo, K.; Kong, D.; Konigsberg, J.; Korytov, A.; Kotwal, A.; Kreps, M.; Kroll, J.; Krop, D.; Krumnack, N.; Kruse, M.; Krutelyov, V.; Kubo, T.; Kuhr, T.; Kulkarni, N.; Kurata, M.; Kwang, S.; Laasanen, A.; Lami, S.; Lammel, S.; Lancaster, M.; Lander, R.; Lannon, K.; Lath, A.; Latino, G.; Lazzizzera, I.; LeCompte, T.; Lee, E.; Lee, H.; Lee, S.; Leone, S.; Lewis, J.; Lin, C.-S.; Linacre, J.; Lindgren, M.; Lipeles, E.; Lister, A.; Litvintsev, D.; Liu, C.; Liu, T.; Lockyer, N.; Loginov, A.; Loreti, M.; Lovas, L.; Lucchesi, D.; Luci, C.; Lueck, J.; Lujan, P.; Lukens, P.; Lungu, G.; Lyons, L.; Lys, J.; Lysak, R.; MacQueen, D.; Madrak, R.; Maeshima, K.; Makhoul, K.; Maki, T.; Maksimovic, P.; Malde, S.; Malik, S.; Manca, G.; Manousakis-Katsikakis, A.; Margaroli, F.; Marino, C.; Marino, C.; Martin, A.; Martin, V.; Martínez, M.; Martínez-Ballarín, R.; Maruyama, T.; Mastrandrea, P.; Masubuchi, T.; Mathis, M.; Mattson, M.; Mazzanti, P.; McFarland, K.; McIntyre, P.; McNulty, R.; Mehta, A.; Mehtala, P.; Menzione, A.; Merkel, P.; Mesropian, C.; Miao, T.; Miladinovic, N.; Miller, R.; Mills, C.; Milnik, M.; Mitra, A.; Mitselmakher, G.; Miyake, H.; Moggi, N.; Moon, C.; Moore, R.; Morello, M.; Morlock, J.; Movilla Fernandez, P.; Mülmenstädt, J.; Mukherjee, A.; Muller, Th.; Mumford, R.; Murat, P.; Mussini, M.; Nachtman, J.; Nagai, Y.; Nagano, A.; Naganoma, J.; Nakamura, K.; Nakano, I.; Napier, A.; Necula, V.; Nett, J.; Neu, C.; Neubauer, M.; Neubauer, S.; Nielsen, J.; Nodulman, L.; Norman, M.; Norniella, O.; Nurse, E.; Oakes, L.; Oh, S.; Oh, Y.; Oksuzian, I.; Okusawa, T.; Orava, R.; Osterberg, K.; Pagan Griso, S.; Palencia, E.; Papadimitriou, V.; Papaikonomou, A.; Paramonov, A.; Parks, B.; Pashapour, S.; Patrick, J.; Pauletta, G.; Paulini, M.; Paus, C.; Peiffer, T.; Pellett, D.; Penzo, A.; Phillips, T.; Piacentino, G.; Pianori, E.; Pinera, L.; Pitts, K.; Plager, C.; Pondrom, L.; Poukhov, O.; Pounder, N.; Prakoshyn, F.; Pronko, A.; Proudfoot, J.; Ptohos, F.; Pueschel, E.; Punzi, G.; Pursley, J.; Rademacker, J.; Rahaman, A.; Ramakrishnan, V.; Ranjan, N.; Redondo, I.; Renton, P.; Renz, M.; Rescigno, M.; Richter, S.; Rimondi, F.; Ristori, L.; Robson, A.; Rodrigo, T.; Rodriguez, T.; Rogers, E.; Rolli, S.; Roser, R.; Rossi, M.; Rossin, R.; Roy, P.; Ruiz, A.; Russ, J.; Rusu, V.; Rutherford, B.; Saarikko, H.; Safonov, A.; Sakumoto, W.; Saltó, O.; Santi, L.; Sarkar, S.; Sartori, L.; Sato, K.; Savoy-Navarro, A.; Schlabach, P.; Schmidt, A.; Schmidt, E.; Schmidt, M.; Schmidt, M.; Schmitt, M.; Schwarz, T.; Scodellaro, L.; Scribano, A.; Scuri, F.; Sedov, A.; Seidel, S.; Seiya, Y.; Semenov, A.; Sexton-Kennedy, L.; Sforza, F.; Sfyrla, A.; Shalhout, S.; Shears, T.; Shepard, P.; Shimojima, M.; Shiraishi, S.; Shochet, M.; Shon, Y.; Shreyber, I.; Sidoti, A.; Sinervo, P.; Sisakyan, A.; Slaughter, A.; Slaunwhite, J.; Sliwa, K.; Smith, J.; Snider, F.; Snihur, R.; Soha, A.; Somalwar, S.; Sorin, V.; Spalding, J.; Spreitzer, T.; Squillacioti, P.; Stanitzki, M.; St. Denis, R.; Stelzer, B.; Stelzer-Chilton, O.; Stentz, D.; Strologas, J.; Strycker, G.; Stuart, D.; Suh, J.; Sukhanov, A.; Suslov, I.; Suzuki, T.; Taffard, A.; Takashima, R.; Takeuchi, Y.; Tanaka, R.; Tecchio, M.; Teng, P.; Terashi, K.; Thom, J.; Thompson, A.; Thompson, G.; Thomson, E.; Tipton, P.; Ttito-Guzmán, P.; Tkaczyk, S.; Toback, D.; Tokar, S.; Tollefson, K.; Tomura, T.; Tonelli, D.; Torre, S.; Torretta, D.; Totaro, P.; Tourneur, S.; Trovato, M.; Tsai, S.-Y.; Tu, Y.; Turini, N.; Ukegawa, F.; Vallecorsa, S.; van Remortel, N.; Varganov, A.; Vataga, E.; Vázquez, F.; Velev, G.; Vellidis, C.; Vidal, M.; Vidal, R.; Vila, I.; Vilar, R.; Vine, T.; Vogel, M.; Volobouev, I.; Volpi, G.; Wagner, P.; Wagner, R.; Wagner, R.; Wagner, W.; Wagner-Kuhr, J.; Wakisaka, T.; Wallny, R.; Wang, S.; Warburton, A.; Waters, D.; Weinberger, M.; Weinelt, J.; Wester, W.; Whitehouse, B.; Whiteson, D.; Wicklund, A.; Wicklund, E.; Wilbur, S.; Williams, G.; Williams, H.; Wilson, P.; Winer, B.; Wittich, P.; Wolbers, S.; Wolfe, C.; Wright, T.; Wu, X.; Würthwein, F.; Xie, S.; Yagil, A.; Yamamoto, K.; Yamaoka, J.; Yang, U.; Yang, Y.; Yao, W.; Yeh, G.; Yoh, J.; Yorita, K.; Yoshida, T.; Yu, G.; Yu, I.; Yu, S.; Yun, J.; Zanello, L.; Zanetti, A.; Zhang, X.; Zheng, Y.; Zucchelli, S.en
dc.identifier.orcidhttps://orcid.org/0000-0002-6047-4211
mit.licensePUBLISHER_POLICYen
mit.metadata.statusComplete


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