Search for the neutral current top quark decaytZcusing the ratio ofZ-boson+4jetstoW-boson+4jetsproduction Academic Article uri icon

abstract

  • We have used the Collider Detector at Fermilab (CDF-II) to search for the flavor-changing neutral-current (FCNC) top-quark decay tZc using a technique employing ratios of W and Z production, measured in pp data corresponding to an integrated luminosity of 1.52fb-1. The analysis uses a comparison of two decay chains, ppttWbWbbjjb and ppttZcWbcjjb, 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 tt 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(tZc) using a likelihood constructed from the cjjb top-quark mass distribution and the number of bjjb 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. 2009 The American Physical Society.

published proceedings

  • Physical Review D

author list (cited authors)

  • Aaltonen, T., Adelman, J., Akimoto, T., lvarez Gonzlez, B., Amerio, S., Amidei, D., ... Zucchelli, S.

citation count

  • 4

complete list of authors

  • Aaltonen, 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, VE||Barnett, BA||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, RE||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, HS||Budd, S||Burke, S||Burkett, K||Busetto, G||Bussey, P||Buzatu, A||Byrum, KL||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, SH||Chen, YC||Chertok, M||Chiarelli, G||Chlachidze, G||Chlebana, F||Cho, K||Chokheli, D||Chou, JP||Choudalakis, G||Chuang, SH||Chung, K||Chung, WH||Chung, YS||Chwalek, T||Ciobanu, CI||Ciocci, MA||Clark, A||Clark, D||Compostella, G||Convery, ME||Conway, J||Cordelli, M||Cortiana, G||Cox, CA||Cox, DJ||Crescioli, F||Cuenca Almenar, C||Cuevas, J||Culbertson, R||Cully, JC||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, PF||di Giovanni, GP||Dionisi, C||Di Ruzza, B||Dittmann, JR||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, HC||Farrington, S||Fedorko, WT||Feild, RG||Feindt, M||Fernandez, JP||Ferrazza, C||Field, R||Flanagan, G||Forrest, R||Frank, MJ||Franklin, M||Freeman, JC||Frisch, HJ||Furic, I||Gallinaro, M||Galyardt, J||Garberson, F||Garcia, JE||Garfinkel, AF||Genser, K||Gerberich, H||Gerdes, D||Gessler, A||Giagu, S||Giakoumopoulou, V||Giannetti, P||Gibson, K||Gimmell, JL||Ginsburg, CM||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, AT||Goulianos, K||Gresele, A||Grinstein, S||Grosso-Pilcher, C||Group, RC||Grundler, U||Guimaraes da Costa, J||Gunay-Unalan, Z||Haber, C||Hahn, K||Hahn, SR||Halkiadakis, E||Han, B-Y||Han, JY||Happacher, F||Hara, K||Hare, D||Hare, M||Harper, S||Harr, RF||Harris, RM||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, CS||Hirschbuehl, D||Hocker, A||Hou, S||Houlden, M||Hsu, S-C||Huffman, BT||Hughes, RE||Husemann, U||Hussein, M||Huston, J||Incandela, J||Introzzi, G||Iori, M||Ivanov, A||James, E||Jang, D||Jayatilaka, B||Jeon, EJ||Jha, MK||Jindariani, S||Johnson, W||Jones, M||Joo, KK||Jun, SY||Jung, JE||Junk, TR||Kamon, T||Kar, D||Karchin, PE||Kato, Y||Kephart, R||Keung, J||Khotilovich, V||Kilminster, B||Kim, DH||Kim, HS||Kim, HW||Kim, JE||Kim, MJ||Kim, SB||Kim, SH||Kim, YK||Kimura, N||Kirsch, L||Klimenko, S||Knuteson, B||Ko, BR||Kondo, K||Kong, DJ||Konigsberg, J||Korytov, A||Kotwal, AV||Kreps, M||Kroll, J||Krop, D||Krumnack, N||Kruse, M||Krutelyov, V||Kubo, T||Kuhr, T||Kulkarni, NP||Kurata, M||Kwang, S||Laasanen, AT||Lami, S||Lammel, S||Lancaster, M||Lander, RL||Lannon, K||Lath, A||Latino, G||Lazzizzera, I||LeCompte, T||Lee, E||Lee, HS||Lee, SW||Leone, S||Lewis, JD||Lin, C-S||Linacre, J||Lindgren, M||Lipeles, E||Lister, A||Litvintsev, DO||Liu, C||Liu, T||Lockyer, NS||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, CP||Martin, A||Martin, V||Martínez, M||Martínez-Ballarín, R||Maruyama, T||Mastrandrea, P||Masubuchi, T||Mathis, M||Mattson, ME||Mazzanti, P||McFarland, KS||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, CS||Moore, R||Morello, MJ||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, MS||Neubauer, S||Nielsen, J||Nodulman, L||Norman, M||Norniella, O||Nurse, E||Oakes, L||Oh, SH||Oh, YD||Oksuzian, I||Okusawa, T||Orava, R||Osterberg, K||Pagan Griso, S||Palencia, E||Papadimitriou, V||Papaikonomou, A||Paramonov, AA||Parks, B||Pashapour, S||Patrick, J||Pauletta, G||Paulini, M||Paus, C||Peiffer, T||Pellett, DE||Penzo, A||Phillips, TJ||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, WK||Saltó, O||Santi, L||Sarkar, S||Sartori, L||Sato, K||Savoy-Navarro, A||Schlabach, P||Schmidt, A||Schmidt, EE||Schmidt, MA||Schmidt, MP||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, SZ||Shears, T||Shepard, PF||Shimojima, M||Shiraishi, S||Shochet, M||Shon, Y||Shreyber, I||Sidoti, A||Sinervo, P||Sisakyan, A||Slaughter, AJ||Slaunwhite, J||Sliwa, K||Smith, JR||Snider, FD||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, GL||Stuart, D||Suh, JS||Sukhanov, A||Suslov, I||Suzuki, T||Taffard, A||Takashima, R||Takeuchi, Y||Tanaka, R||Tecchio, M||Teng, PK||Terashi, K||Thom, J||Thompson, AS||Thompson, GA||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, RG||Wagner, RL||Wagner, W||Wagner-Kuhr, J||Wakisaka, T||Wallny, R||Wang, SM||Warburton, A||Waters, D||Weinberger, M||Weinelt, J||Wester, WC||Whitehouse, B||Whiteson, D||Wicklund, AB||Wicklund, E||Wilbur, S||Williams, G||Williams, HH||Wilson, P||Winer, BL||Wittich, P||Wolbers, S||Wolfe, C||Wright, T||Wu, X||Würthwein, F||Xie, S||Yagil, A||Yamamoto, K||Yamaoka, J||Yang, UK||Yang, YC||Yao, WM||Yeh, GP||Yoh, J||Yorita, K||Yoshida, T||Yu, GB||Yu, I||Yu, SS||Yun, JC||Zanello, L||Zanetti, A||Zhang, X||Zheng, Y||Zucchelli, S

publication date

  • September 2009