@article{3152567,
    title = "Search for the rare radiative decay W -> pi gamma in p(p)over-bar
collisions at root s=1.96 TeV",
    author = "Aaltonen, T. and Alvarez Gonzalez, B. and Amerio, S. and Amidei, D. and and Anastassov, A. and Annovi, A. and Antos, J. and Apollinari, G. and and Appel, J. A. and Apresyan, A. and Arisawa, T. and Artikov, A. and and Asaadi, J. and Ashmanskas, W. and Auerbach, B. and Aurisano, A. and and Azfar, F. and Badgett, W. and Barbaro-Galtieri, A. and Barnes, V. E. and and Barnett, B. A. and Barria, P. and Bartos, P. and Bauce, M. and Bauer, G. and and Bedeschi, F. and Beecher, D. and Behari, S. and Bellettini, G. and and Bellinger, J. and Benjamin, D. and Beretvas, A. and Bhatti, A. and and Binkley, M. and Bisello, D. and Bizjak, I. and Bland, K. R. and and Blumenfeld, B. and Bocci, A. and Bodek, A. and Bortoletto, D. and and Boudreau, J. and Boveia, A. and Brau, B. and Brigliadori, L. and and Brisuda, A. and Bromberg, C. and Brucken, E. and Bucciantonio, M. and and Budagov, J. and Budd, H. S. and Budd, S. and Burkett, K. and Busetto, G. and and Bussey, P. and Buzatu, A. and Calancha, C. and Camarda, S. and and Campanelli, M. and Campbell, M. and Canelli, F. and Canepa, A. and and Carls, B. and Carlsmith, D. and Carosi, R. and Carrillo, S. and Carron, and S. and Casal, B. and Casarsa, M. and Castro, A. and Catastini, P. and and Cauz, D. and Cavaliere, V. and Cavalli-Sforza, M. and Cerri, A. and and Cerrito, L. and Chen, Y. C. and Chertok, M. and Chiarelli, G. and and Chlachidze, G. and Chlebana, F. and Cho, K. and Chokheli, D. and Chou, and J. P. and Chung, W. H. and Chung, Y. S. and Ciobanu, C. I. and Ciocci, and M. A. and Clark, A. and Compostella, G. and Convery, M. E. and Conway, and J. and Corbo, M. and Cordelli, M. and Cox, C. A. and Cox, D. J. and and Crescioli, F. and Almenar, C. Cuenca and Cuevas, J. and Culbertson, R. and and Dagenhart, D. and d'Ascenzo, N. and Datta, M. and de Barbaro, P. and and De Cecco, S. and De Lorenzo, G. and Dell'Orso, M. and Deluca, C. and and Demortier, L. and Deng, J. and Deninno, M. and Devoto, F. and d'Errico, and M. and Di Canto, A. and Di Ruzza, B. and Dittmann, J. R. and D'Onofrio, and M. and Donati, S. and Dong, P. and Dorigo, M. and Dorigo, T. and Ebina, and K. and Elagin, A. and Eppig, A. and Erbacher, R. and Errede, D. and and Errede, S. and Ershaidat, N. and Eusebi, R. and Fang, H. C. and and Farrington, S. and Feindt, M. and Fernandez, J. P. and Ferrazza, C. and and Field, R. and Flanagan, G. and Forrest, R. and Frank, M. J. and and Franklin, M. and Freeman, J. C. and Funakoshi, Y. and Furic, I. and and Gallinaro, M. and Galyardt, J. and Garcia, J. E. and Garfinkel, A. F. and and Garosi, P. and Gerberich, H. and Gerchtein, E. and Giagu, S. and and Giakoumopoulou, V. and Giannetti, P. and Gibson, K. and Ginsburg, C. M. and and Giokaris, N. and Giromini, P. and Giunta, M. and Giurgiu, G. and and Glagolev, V. and Glenzinski, D. and Gold, M. and Goldin, D. and and Goldschmidt, N. and Golossanov, A. and Gomez, G. and Gomez-Ceballos, G. and and Goncharov, M. and Gonzalez, O. and Gorelov, I. and Goshaw, A. T. and and Goulianos, K. and Grinstein, S. and Grosso-Pilcher, C. and Group, R. C. and and da Costa, J. Guimaraes and Gunay-Unalan, Z. and Haber, C. and Hahn, and S. R. and Halkiadakis, E. and Hamaguchi, A. and Han, J. Y. and and Happacher, F. and Hara, K. and Hare, D. and Hare, M. and Harr, R. F. and and Hatakeyama, K. and Hays, C. and Heck, M. and Heinrich, J. and Herndon, and M. and Hewamanage, S. and Hidas, D. and Hocker, A. and Hopkins, W. and and Horn, D. and Hou, S. and Hughes, R. E. and Hurwitz, M. and Husemann, U. and and Hussain, N. and Hussein, M. and Huston, J. and Introzzi, G. and and Iori, M. and Ivanov, A. and James, E. and Jang, D. and Jayatilaka, B. and and Jeon, E. J. and Jha, M. K. and Jindariani, S. and Johnson, W. and and Jones, M. and Joo, K. K. and Jun, S. Y. and Junk, T. R. and Kamon, T. and and Karchin, P. E. and Kato, Y. and Ketchum, W. and Keung, J. and and Khotilovich, V. and Kilminster, B. and Kim, D. H. and Kim, H. S. and and Kim, H. W. and Kim, J. E. and Kim, M. J. and Kim, S. B. and Kim, S. H. and and Kim, Y. K. and Kimura, N. and Kirby, M. and Klimenko, S. and Kondo, and K. and Kong, D. J. and Konigsberg, J. and Kotwal, A. V. and Kreps, M. and and Kroll, J. and Krop, D. and Krumnack, N. and Kruse, M. and Krutelyov, and V. and Kuhr, T. and Kurata, M. and Kwang, S. and Laasanen, A. T. and and Lami, S. and Lammel, S. and Lancaster, M. and Lander, R. L. and Lannon, and K. and Lath, A. and Latino, G. and LeCompte, T. and Lee, E. and Lee, H. and S. and Lee, J. S. and Lee, S. W. and Leo, S. and Leone, S. and Lester, and C. M. and Lewis, J. D. and Limosani, A. and Lin, C. -J. and Linacre, J. and and Lindgren, M. and Lipeles, E. and Lister, A. and Litvintsev, D. O. and and Liu, C. and Liu, Q. and Liu, T. and Lockwitz, S. and Lockyer, N. S. and and Loginov, A. and Lucchesi, D. and Lueck, J. and Lujan, P. and Lukens, and P. and Lungu, G. and Lys, J. and Lysak, R. and Madrak, R. and Maeshima, and K. and Makhoul, K. and Maksimovic, P. and Malik, S. and Manca, G. and and Manousakis-Katsikakis, A. and Margaroli, F. and Marino, C. and Martinez, and M. and Martinez-Ballarin, R. and Mastrandrea, P. and Mathis, M. and and Mattson, M. E. and Mazzanti, P. and McFarland, K. S. and McIntyre, P. and and McNulty, R. and Mehta, A. and Mehtala, P. and Menzione, A. and and Mesropian, C. and Miao, T. and Mietlicki, D. and Mitra, A. and Miyake, and H. and Moed, S. and Moggi, N. and Mondragon, M. N. and Moon, C. S. and and Moore, R. and Morello, M. J. and Morlock, J. and Fernandez, P. Movilla and and Mukherjee, A. and Muller, Th and Murat, P. and Mussini, M. and and Nachtman, J. and Nagai, Y. and Naganoma, J. and Nakano, I. and Napier, and A. and Nett, J. and Neu, C. and Neubauer, M. S. and Nielsen, J. and and Nodulman, L. and Norniella, O. and Nurse, E. and Oakes, L. and Oh, S. H. and and Oh, Y. D. and Oksuzian, I. and Okusawa, T. and Orava, R. and and Ortolan, L. and Griso, S. Pagan and Pagliarone, C. and Palencia, E. and and Papadimitriou, V. and Paramonov, A. A. and Patrick, J. and Pauletta, G. and and Paulini, M. and Paus, C. and Pellett, D. E. and Penzo, A. and and Phillips, T. J. and Piacentino, G. and Pianori, E. and Pilot, J. and and Pitts, K. and Plager, C. and Pondrom, L. and Potamianos, K. and Poukhov, and O. and Prokoshin, F. and Pronko, A. and Ptohos, F. and Pueschel, E. and and Punzi, G. and Pursley, J. and Rahaman, A. and Ramakrishnan, V. and and Ranjan, N. and Redondo, I. and Renton, P. and Rescigno, M. and Rimondi, and F. and Ristori, L. and Robson, A. and Rodrigo, T. and Rodriguez, T. and and Rogers, E. and Rolli, S. and Roser, R. and Rossi, M. and Rubbo, F. and and Ruffini, F. and Ruiz, A. and Russ, J. and Rusu, V. and Safonov, A. and and Sakumoto, W. K. and Sakurai, Y. and Santi, L. and Sartori, L. and Sato, and K. and Saveliev, V. and Savoy-Navarro, A. and Schlabach, P. and Schmidt, and A. and Schmidt, E. E. and Schmidt, M. P. and Schmitt, M. and Schwarz, T. and and Scodellaro, L. and Scribano, A. and Scuri, F. and Sedov, A. and and Seidel, S. and Seiya, Y. and Semenov, A. and Sforza, F. and Sfyrla, A. and and Shalhout, S. Z. and Shears, T. and Shepard, P. F. and Shimojima, M. and and Shiraishi, S. and Shochet, M. and Shreyber, I. and Simonenko, A. and and Sinervo, P. and Sissakian, A. and Sliwa, K. and Smith, J. R. and Snider, and F. D. and Soha, A. and Somalwar, S. and Sorin, V. and Squillacioti, P. and and Stancari, M. and Stanitzki, M. and St Denis, R. and Stelzer, B. and and Stelzer-Chilton, O. and Stentz, D. and Strologas, J. and Strycker, G. L. and and Sudo, Y. and Sukhanov, A. and Suslov, I. and Takemasa, K. and and Takeuchi, Y. and Tang, J. and Tecchio, M. and Teng, P. K. and Thom, J. and and Thome, J. and Thompson, G. A. and Thomson, E. and Ttito-Guzman, P. and and Tkaczyk, S. and Toback, D. and Tokar, S. and Tollefson, K. and and Tomura, T. and Tonelli, D. and Torre, S. and Torretta, D. and Totaro, P. and and Trovato, M. and Tu, Y. and Ukegawa, F. and Uozumi, S. and Varganov, and A. and Vazquez, F. and Velev, G. and Vellidis, C. and Vidal, M. and and Vila, I. and Vilar, R. and Vizan, J. and Vogel, M. and Volpi, G. and and Wagner, P. and Wagner, R. L. and Wakisaka, T. and Wallny, R. and Wang, and S. M. and Warburton, A. and Waters, D. and Weinberger, M. and Wester, and III, W. C. and Whitehouse, B. and Whiteson, D. and Wicklund, A. B. and and Wicklund, E. and Wilbur, S. and Wick, F. and Williams, H. H. and Wilson, and J. S. and Wilson, P. and Winer, B. L. and Wittich, P. and Wolbers, S. and and Wolfe, H. and Wright, T. and Wu, X. and Wu, Z. and Yamamoto, K. and and Yamaoka, J. and Yang, T. and Yang, U. K. and Yang, Y. C. and Yao, W. -M. and and Yeh, G. P. and Yi, K. and Yoh, J. and Yorita, K. and Yoshida, T. and and Yu, G. B. and Yu, I. and Yu, S. S. and Yun, J. C. and Zanetti, A. and and Zeng, Y. and Zucchelli, S. and CDF Collaboration",
    journal = "Physical Review D",
    year = "2012",
    volume = "85",
    number = "3",
    publisher = "AMER PHYSICAL SOC",
    issn = "2470-0010, 2470-0029",
    doi = "10.1103/PhysRevD.85.032001",
    abstract = "We present a search for the rare radiative decay W+ -> pi(+)gamma using
data corresponding to an integrated luminosity of 4.3 fb(-1) of
proton-antiproton collisions at a center-of-mass energy of 1.96 TeV
collected by the CDF experiment at Fermilab. As no statistically
significant signal is observed, we set a 95%-confidence- level upper
limit on the relative branching fraction Gamma(W+ ->
pi(+)gamma)/Gamma(W+ -> e(+) nu) at 6.4 x 10(-5), a factor of 10
improvement over the previous limit."
}