Measurement of the helicity fractions of W bosons from top quark decays using fully reconstructed t(t)over-bar events with CDF II Academic Article uri icon

abstract

  • We present a measurement of the fractions F0 and F+ of longitudinally polarized and right-handed W bosons in top-quark decays using data collected with the CDF II detector. The data set used in the analysis corresponds to an integrated luminosity of approximately 318pb-1. We select tt candidate events with one lepton, at least four jets, and missing transverse energy. Our helicity measurement uses the decay angle *, which is defined as the angle between the momentum of the charged lepton in the W boson rest frame and the W momentum in the top-quark rest frame. The cos * distribution in the data is determined by full kinematic reconstruction of the tt candidates. We find F0=0.85-0.22+0.15(stat)0.06(syst) and F+=0.05-0.05+0.11(stat)0.03(syst), which is consistent with the standard model prediction. We set an upper limit on the fraction of right-handed W bosons of F+<0.26 at the 95% confidence level. 2007 The American Physical Society.

published proceedings

  • PHYSICAL REVIEW D

author list (cited authors)

  • Abulencia, A., Adelman, J., Affolder, T., Akimoto, T., Albrow, M. G., Ambrose, D., ... Zucchelli, S.

citation count

  • 25

complete list of authors

  • Abulencia, A||Adelman, J||Affolder, T||Akimoto, T||Albrow, MG||Ambrose, D||Amerio, S||Amidei, D||Anastassov, A||Anikeev, K||Annovi, A||Antos, J||Aoki, M||Apollinari, G||Arguin, J-F||Arisawa, T||Artikov, A||Ashmanskas, W||Attal, A||Azfar, F||Azzi-Bacchetta, P||Azzurri, P||Bacchetta, N||Badgett, W||Barbaro-Galtieri, A||Barnes, VE||Barnett, BA||Baroiant, S||Bartsch, V||Bauer, G||Bedeschi, F||Behari, S||Belforte, S||Bellettini, G||Bellinger, J||Belloni, A||Benjamin, D||Beretvas, A||Beringer, J||Berry, T||Bhatti, A||Binkley, M||Bisello, D||Blair, RE||Blocker, C||Blumenfeld, B||Bocci, A||Bodek, A||Boisvert, V||Bolla, G||Bolshov, A||Bortoletto, D||Boudreau, J||Boveia, A||Brau, B||Brigliadori, L||Bromberg, C||Brubaker, E||Budagov, J||Budd, HS||Budd, S||Budroni, S||Burkett, K||Busetto, G||Bussey, P||Byrum, KL||Cabrera, S||Campanelli, M||Campbell, M||Canelli, F||Canepa, A||Carillo, S||Carlsmith, D||Carosi, R||Casarsa, M||Castro, A||Catastini, P||Cauz, D||Cavalli-Sforza, M||Cerri, A||Cerrito, L||Chang, SH||Chen, YC||Chertok, M||Chiarelli, G||Chlachidze, G||Chlebana, F||Cho, I||Cho, K||Chokheli, D||Chou, JP||Choudalakis, G||Chuang, SH||Chung, K||Chung, WH||Chung, YS||Chwalek, T||Ciljak, M||Ciobanu, CI||Ciocci, MA||Clark, A||Clark, D||Coca, M||Compostella, G||Convery, ME||Conway, J||Cooper, B||Copic, K||Cordelli, M||Cortiana, G||Crescioli, F||Almenar, C Cuenca||Cuevas, J||Culbertson, R||Cully, JC||Cyr, D||DaRonco, S||Datta, M||D'Auria, S||Davies, T||D'Onofrio, M||Dagenhart, D||de Barbaro, P||De Cecco, S||Deisher, A||De Lentdecker, G||Dell'Orso, M||Paoli, F Delli||Demortier, L||Deng, J||Deninno, M||De Pedis, D||Derwent, PF||Di Giovanni, GP||Dionisi, C||Di Ruzza, B||Dittmann, JR||DiTuro, P||Doerr, C||Donati, S||Donega, M||Dong, P||Donini, J||Dorigo, T||Dube, S||Efron, J||Erbacher, R||Erdmann, M||Errede, D||Errede, S||Eusebi, R||Fang, HC||Farrington, S||Fedorko, I||Fedorko, WT||Feild, RG||Feindt, M||Fernandez, JP||Field, R||Flanagan, G||Foland, A||Forrester, S||Foster, GW||Franklin, M||Freeman, JC||Furic, I||Gallinaro, M||Galyardt, J||Garcia, JE||Garberson, F||Garfinkel, AF||Gay, C||Gerberich, H||Gerdes, D||Giagu, S||Giannetti, P||Gibson, A||Gibson, K||Gimmell, JL||Ginsburg, C||Giokaris, N||Giordani, M||Giromini, P||Giunta, M||Giurgiu, G||Glagolev, V||Glenzinski, D||Gold, M||Goldschmidt, N||Goldstein, J||Golossanov, A||Gomez, G||Gomez-Ceballos, G||Goncharov, M||Gonzalez, O||Gorelov, I||Goshaw, AT||Goulianos, K||Gresele, A||Griffiths, M||Grinstein, S||Grosso-Pilcher, C||Group, RC||Grundler, U||da Costa, J Guimaraes||Gunay-Unalan, Z||Haber, C||Hahn, K||Hahn, SR||Halkiadakis, E||Hamilton, A||Han, B-Y||Han, JY||Handler, R||Happacher, F||Hara, K||Hare, M||Harper, S||Harr, RF||Harris, RM||Hartz, M||Hatakeyama, K||Hauser, J||Heijboer, A||Heinemann, B||Heinrich, J||Henderson, C||Herndon, M||Heuser, J||Hidas, D||Hill, CS||Hirschbuehl, D||Hocker, A||Holloway, A||Hou, S||Houlden, M||Hsu, S-C||Huffman, BT||Hughes, RE||Husemann, U||Huston, J||Incandela, J||Introzzi, G||Iori, M||Ishizawa, Y||Ivanov, A||Iyutin, B||James, E||Jang, D||Jayatilaka, B||Jeans, D||Jensen, H||Jeon, EJ||Jindariani, S||Jones, M||Joo, KK||Jun, SY||Jung, JE||Junk, TR||Kamon, T||Karchin, PE||Kato, Y||Kemp, Y||Kephart, R||Kerzel, U||Khotilovich, V||Kilminster, B||Kim, DH||Kim, HS||Kim, JE||Kim, MJ||Kim, SB||Kim, SH||Kim, YK||Kimura, N||Kirsch, L||Klimenko, S||Klute, M||Knuteson, B||Ko, BR||Kondo, K||Kong, DJ||Konigsberg, J||Korytov, A||Kotwal, AV||Kovalev, A||Kraan, AC||Kraus, J||Kravchenko, I||Kreps, M||Kroll, J||Krumnack, N||Kruse, M||Krutelyov, V||Kubo, T||Kuhlmann, SE||Kuhr, T||Kusakabe, Y||Kwang, S||Laasanen, AT||Lai, S||Lami, S||Lammel, S||Lancaster, M||Lander, RL||Lannon, K||Lath, A||Latino, G||Lazzizzera, I||LeCompte, T||Lee, J||Lee, J||Lee, YJ||Lee, SW||Lefevre, R||Leonardo, N||Leone, S||Levy, S||Lewis, JD||Lin, C||Lin, CS||Lindgren, M||Lipeles, E||Liss, TM||Lister, A||Litvintsev, DO||Liu, T||Lockyer, NS||Loginov, A||Loreti, M||Loverre, P||Lu, R-S||Lucchesi, D||Lujan, P||Lukens, P||Lungu, G||Lyons, L||Lys, J||Lysak, R||Lytken, E||Mack, P||MacQueen, D||Madrak, R||Maeshima, K||Makhoul, K||Maki, T||Maksimovic, P||Malde, S||Manca, G||Margaroli, F||Marginean, R||Marino, C||Marino, CP||Martin, A||Martin, M||Martin, V||Martinez, M||Maruyama, T||Mastrandrea, P||Masubuchi, T||Matsunaga, H||Mattson, ME||Mazini, R||Mazzanti, P||McFarland, KS||McIntyre, P||McNulty, R||Mehta, A||Mehtala, P||Menzemer, S||Menzione, A||Merkel, P||Mesropian, C||Messina, A||Miao, T||Miladinovic, N||Miles, J||Miller, R||Mills, C||Milnik, M||Mitra, A||Mitselmakher, G||Miyamoto, A||Moed, S||Moggi, N||Mohr, B||Moore, R||Morello, M||Fernandez, P Movilla||Muelmenstaedt, J||Mukherjee, A||Muller, Th||Mumford, R||Murat, P||Nachtman, J||Nagano, A||Naganoma, J||Nakano, I||Napier, A||Necula, V||Neu, C||Neubauer, MS||Nielsen, J||Nigmanov, T||Nodulman, L||Norniella, O||Nurse, E||Oh, SH||Oh, YD||Oksuzian, I||Okusawa, T||Oldeman, R||Orava, R||Osterberg, K||Pagliarone, C||Palencia, E||Papadimitriou, V||Paramonov, AA||Parks, B||Pashapour, S||Patrick, J||Pauletta, G||Paulini, M||Paus, C||Pellett, DE||Penzo, A||Phillips, TJ||Piacentino, G||Piedra, J||Pinera, L||Pitts, K||Plager, C||Pondrom, L||Portell, X||Poukhov, O||Pounder, N||Prakoshyn, F||Pronko, A||Proudfoot, J||Ptohos, F||Punzi, G||Pursley, J||Rademacker, J||Rahaman, A||Ranjan, N||Rappoccio, S||Reisert, B||Rekovic, V||Renton, P||Rescigno, M||Richter, S||Rimondi, F||Ristori, L||Robson, A||Rodrigo, T||Rogers, E||Rolli, S||Roser, R||Rossi, M||Rossin, R||Ruiz, A||Russ, J||Rusu, V||Saarikko, H||Sabik, S||Safonov, A||Sakumoto, WK||Salamanna, G||Salto, O||Saltzberg, D||Sanchez, C||Santi, L||Sarkar, S||Sartori, L||Sato, K||Savard, P||Savoy-Navarro, A||Scheidle, T||Schlabach, P||Schmidt, EE||Schmidt, MP||Schmitt, M||Schwarz, T||Scodellaro, L||Scott, AL||Scribano, A||Scuri, F||Sedov, A||Seidel, S||Seiya, Y||Semenov, A||Sexton-Kennedy, L||Sfyrla, A||Shapiro, MD||Shears, T||Shepard, PF||Sherman, D||Shimojima, M||Shochet, M||Shon, Y||Shreyber, I||Sidoti, A||Sinervo, P||Sisakyan, A||Sjolin, J||Slaughter, AJ||Slaunwhite, J||Sliwa, K||Smith, JR||Snider, FD||Snihur, R||Soderberg, M||Soha, A||Somalwar, S||Sorin, V||Spalding, J||Spinella, F||Spreitzer, T||Squillacioti, P||Stanitzki, M||Staveris-Polykalas, A||Denis, R St||Stelzer, B||Stelzer-Chilton, O||Stentz, D||Strologas, J||Stuart, D||Suh, JS||Sukhanov, A||Sun, H||Suzuki, T||Taffard, A||Takashima, R||Takeuchi, Y||Takikawa, K||Tanaka, M||Tanaka, R||Tecchio, M||Teng, PK||Terashi, K||Thom, J||Thompson, AS||Thomson, E||Tipton, P||Tiwari, V||Tkaczyk, S||Toback, D||Tokar, S||Tollefson, K||Tomura, T||Tonelli, D||Torre, S||Torretta, D||Tourneur, S||Trischuk, W||Tsuchiya, R||Tsuno, S||Turini, N||Ukegawa, F||Unverhau, T||Uozumi, S||Usynin, D||Vallecorsa, S||van Remortel, N||Varganov, A||Vataga, E||Vazquez, F||Velev, G||Veramendi, G||Veszpremi, V||Vidal, R||Vila, I||Vilar, R||Vine, T||Vollrath, I||Volobouev, I||Volpi, G||Wuerthwein, F||Wagner, P||Wagner, RG||Wagner, RL||Wagner, J||Wagner, W||Wallny, R||Wang, SM||Warburton, A||Waschke, S||Waters, D||Wester, WCIII||Whitehouse, B||Whiteson, D||Wicklund, AB||Wicklund, E||Williams, G||Williams, HH||Wilson, P||Winer, BL||Wittich, P||Wolbers, S||Wolfe, C||Wright, T||Wu, X||Wynne, SM||Yagil, A||Yamamoto, K||Yamaoka, J||Yamashita, T||Yang, C||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||Zaw, I||Zhang, X||Zhou, J||Zucchelli, S

publication date

  • March 2007