OPMD

Research group

Research theme

Sub department

About

Related research groups

Measurement of the W boson polarization in top decay at CDF at √s = 1.8 TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 71:3 (2005) 031101-1-031101-7

Authors:

DE Acosta, T Affolder, MG Albrow, DJ Ambrose, D Amidei, K Anikeev, J Antoš, G Apollinari, T Arisawa, AM Artikov, WJ Ashmanskas, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, WF Badgett, AA Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Behari, S Belforte, WH Bell, G Bellettini, JN Bellinger, DP Benjamin, A Beretvas, AA Bhatti, ME Binkley, DB Bisello, MR Bishai, RE Blair, CA Blocker, K Bloom, BJ Blumenfeld, A Bocci, A Bodek, G Bolla, AA Bolshov, D Bortoletto, JF Boudreau, CM Bromberg, EM Brubaker, JA Budagov, HS Budd, K Burkett, G Busetto, KL Byrum, S Cabrera, MK Campbell, WC Carithers, D Carlsmith, AJ Castro, D Cauz, A Cerri, L Cerrito, JW Chapman, C Chen, Y Chen, MB Chertok, G Chiarelli, GA Chlachidze, FS Chlebana, M Chu, J Chung, WH Chung, Y Chung, CI Ciobanu, AG Clark, MN Coca, A Connolly, ME Convery, JS Conway, M Cordelli, J Cranshaw, RL Culbertson, DW Dagenhart, S D'Auria, P De Barbaro, SD De Cecco, S Dell'Agnello, M Dell'Orso, SM Demers, L Demortier, MM Deninno, D De Pedis, PF Derwent, C Dionisi, JR Dittmann, A Domínguez, S Donati, M D'Onofrio, T Dorigo, N Eddy, RD Erbacher, D Errede, SM Errede, R Eusebi, SM Farrington, RG Feild, JP Fernández, C Ferretti, RD Field, I Fiori, BL Flaugher, LR Flores-Castillo, GW Foster, MEB Franklin, JI Friedman, IK Furić, M Gallinaro, M Garcia-Sciveres, AF Garfinkel, C Gay, DW Gerdes, E Gerstein, S Giagu, P Giannetti, K Giolo, MP Giordani, P Giromini, VV Glagolev, DA Glenzinskí, MS Gold, N Goldschmidt, J Goldstein, G Gómez, MV Goncharov, IV Gorelov, AT Goshaw, YN Gotra, K Goulianos, A Gresele, C Grosso-Pilcher, M Guenther, JB Guimarães Da Costa, CH Haber, SR Hahn, E Halkiadakis, R Handler, F Happacher, K Hara, RM Harris, FX Hartmann, K Hatakeyama, J Hauser, JG Heinrich, M Hennecke, M Herndon, CS Hill, A Höcker, KD Hoffman, S Hou, BT Huffman, RE Hughes, JW Huston, JR Incandela, G Introzzi, M Iori, C Ìşsever, A Ivanov, Y Iwata, B Iyutin, EB James, MK Jones, T Kamon, J Kang, M Karagöz Ünel, SN Kartal, H Kasha, Y Kato, RD Kennedy, RD Kephart, BJ Kilminster, DH Kim, H Kim, M Kim, SB Kim, S Kim, T Kim, Y Kim, MH Kirby, LE Kirsch, S Klimenko, P Koehn, K Kondo, J Königsberg, A Korn, AV Korytov, J Kroll, MC Kruse, V Krutelyov, SE Kuhlmann, N Kuznetsova, AT Laasanen, SS Lami, S Lammel, JM Lancaster, MA Lancaster, RL Lander, K Lannon, A Lath, G Latino, TJ LeCompte, Y Le, J Lee, S Lee, NT Leonardo, S Leone, JD Lewis, K Li, CSS Lin, MA Lindgren, TM Liss, DO Litvintsev, T Liu, NS Lockyer, AY Loginov, M Loreti, D Lucchesi, PT Lukens, LPR Lyons, JEA Lys, RL Madrak, K Maeshima, P Maksimović, L Malferrari, G Manca, ML Mangano, M Maríotti, AJ Martin, MS Martin, VJ Martin, MI Martínez, P Mazzanti, KS McFarland, PM McIntyre, M Menguzzato, A Menzione, P Merkel, C Mesropian, AB Meyer, T Miao, JS Miller, RJD Miller, S Miscetti, GV Mitselmakher, N Moggi, RW Moore, TK Moulik, A Mukherjee, M Mulhearn, TA Müller, A Munar, PA Murat, JM Nachtman, S Nahn, I Nakano, R Napora, CA Nelson, TK Nelson, C Neu, MS Neubauer, CB Newman-Holmes, F Niell, TS Nigmanov, LJ Nodulman, SH Oh, Y Oh, T Ohsugi, T Okusawa, W Orejudos, CE Pagliarone, FM Palmonari, R Paoletti, VK Papadimitriou, JF Patrick, G Pauletta, MG Paulini, T Pauly, C Paus, DE Pellett, A Penzo, TJ Phillips, GM Piacentino, J Piedra, KT Pitts, A Pompoš, LG Pondrom, G Pope, O Poukhov, T Pratt, FV Prokoshin, J Proudfoot, F Ptohos, G Punzi, JH Rademacker, A Rakitine, FD Ratnikov, H Ray, AJH Reichold, PB Renton, M Rescigno, F Rimondi, L Ristori, WJ Robertson, T Rodrigo, S Rolli, L Rosenson, RM Roser, R Rossin, C Rott, AS Roy, A Ruiz-Jimeno, DT Ryan, AN Safonov, RDS St Denis, WK Sakumoto, DP Saltzberg, CAS Sánchez, A Sansoni, L Santi, S Sarkar, P Savard, A Savoy-Navarro, P Schlabach, EE Schmidt, MP Schmidt, M Schmitt, L Scodellaro, A Scribano, A Sedov, SC Seidel, Y Seiya, AA Semenov, F Semeria, MD Shapiro, PF Shepard, T Shibayama, M Shimojima, MJ Shochet, A Sidoti, AF Sill, PK Sinervo, AJ Slaughter, K Śliwa, FD Snider, R Snihur, MA Spezziga, L Spiegel, F Spinella, M Spiropulu, AAM Stefanini, J Strologas, DD Stuart, AI Sukhanov, KCTO Sumorok, T Suzuki, R Takashima, K Takikawa, M Tanaka, M Tecchio, P Teng, K Terashi, RJ Tesarek, S Tether, J Thom, AS Thompson, EJ Thomson, PL Tipton, SM Tkaczyk, D Toback, K Tollefson, D Tonelli, M Tönnesmann, H Toyoda, W Trischuk, J Tseng, D Tsybychev, N Turini, F Ukegawa, T Unverhau, T Vaiciulis, AV Varganov, ES Vataga, S Vejcik, GV Velev, G Veramendi, RA Vidal, I Vila, R Vilar, I Volobouev, M Von Der Mey, RG Wagner, RL Wagner, W Wagner, Z Wan, C Wang, M Wang, S Wang, BR Ward, S Waschke, DS Waters, TL Watts, MS Weber, WC Wester, B Whitehouse, AB Wicklund, EJ Wicklund, HH Williams, PJ Wilson, BL Winer, SA Wolbers, MW Wolter, SD Worm, X Wu, F Würthwein, U Yang, W Yao, GP Yeh, K Yi, J Yoh, T Yoshida, I Yu, S Yu, JC Yun, L Zanello, AM Zanetti, F Zetti, S Zucchelli

Abstract:

The polarization of the W boson in t →Wb decay is unambiguously predicted by the standard model of electroweak interactions and is a powerful test of our understanding of the tbW vertex. We measure this polarization from the invariant mass of the b quark from t → Wb and the lepton from W → lν whose momenta measure the W decay angle and direction of motion, respectively. In this paper we present a measurement of the decay rate (f V+A) of the W produced from the decay of the top quark in the hypothesis of V + A structure of the tWb vertex. We find no evidence for the nonstandard V + A vertex and set a limit on fV+A < 0.80 at 95% confidence level. By combining this result with a complementary observable in the same data, we assign a limit on fv+A < 0.61 at 95% CL. This corresponds to a constraint on the right-handed helicity component of the W polarization of f+ < 0.18 at 95% CL. This limit is the first significant direct constraint on fV+A in top decay. © 2005 The American Physical Society.

Search for X(3872) in γγ fusion and radiative production at CLEO

Physical Review Letters 94:3 (2005)

Authors:

S Dobbs, Z Metreveli, KK Seth, A Tomaradze, P Zweber, J Ernst, AH Mahmood, H Severini, DM Asner, SA Dytman, W Love, S Mehrabyan, JA Mueller, V Savinov, Z Li, A Lopez, H Mendez, J Ramirez, GS Huang, DH Miller, V Pavlunin, B Sanghi, EI Shibata, IPJ Shipsey, GS Adams, M Chasse, M Cravey, JP Cummings, I Danko, J Napolitano, D Cronin-Hennessy, CS Park, W Park, JB Thayer, EH Thorndike, TE Coan, YS Gao, F Liu, M Artuso, C Boulahouache, S Blusk, J Butt, E Dambasuren, O Dorjkhaidav, N Menaa, R Mountain, H Muramatsu, R Nandakumar, R Redjimi, R Sia, T Skwarnicki, S Stone, JC Wang, K Zhang, SE Csorna, G Bonvicini, D Cinabro, M Dubrovin, A Bornheim, SP Pappas, AJ Weinstein, JL Rosner, RA Briere, GP Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins, NE Adam, JP Alexander, K Berkelman, DG Cassel, V Crede, JE Duboscq, KM Ecklund, R Ehrlich, L Fields, RS Galik, L Gibbons, B Gittelman, R Gray, SW Gray, DL Hartill, BK Heltsley, D Hertz, L Hsu, CD Jones, J Kandaswamy, DL Kreinick, VE Kuznetsov, H Mahlke-Krüger, TO Meyer, PUE Onyisi, JR Patterson, D Peterson, J Pivarski, D Riley, A Ryd, AJ Sadoff, H Schwarthoff

Abstract:

We report on a search for the recently reported X(3872) state using 15.1 fb -1 of e + e - data taken in the √s = 9.46-11.30 GeV region. Separate searches for the production of the X(3872) in untagged γγ fusion and e +e - annihilation following initial state radiation are made by taking advantage of the unique angular correlation between the leptons from the decay J/ψ → l + l - in X(3872) decay to Ï€ + Ï€ - J/ψ. No signals are observed in either case, and 90% confidence upper limits are established as (2J + 1)Γ γγ(X(3872))B(X → Ï€ + Ï€ - ´³/ψ) < 12.9 eV and Γ ee(X(3872))B(X → Ï€ + Ï€ - ´³/ψ)< 8.3 eV. © 2005 The American Physical Society.

Measurement of the W+W- Production Cross Section in ppbar Collisions at sqrt(s)=1.96 TeV using Dilepton Events

ArXiv hep-ex/0501050 (2005)

Authors:

CDF Collaboration, D Acosta

Observation of 1-0- Final States from ψ(2S) Decays and e+e- Annihilation

Physical Review Letters American Physical Society (APS) 94:1 (2005) 012005

Authors:

NE Adam, JP Alexander, K Berkelman, DG Cassel, JE Duboscq, KM Ecklund, R Ehrlich, L Fields, RS Galik, L Gibbons, B Gittelman, R Gray, SW Gray, DL Hartill, BK Heltsley, D Hertz, L Hsu, CD Jones, J Kandaswamy, DL Kreinick, VE Kuznetsov, H Mahlke-Krüger, TO Meyer, PUE Onyisi, JR Patterson, D Peterson, J Pivarski, D Riley, JL Rosner, A Ryd, AJ Sadoff, H Schwarthoff, MR Shepherd, WM Sun, JG Thayer, D Urner, T Wilksen, M Weinberger, SB Athar, P Avery, L Breva-Newell, R Patel, V Potlia, H Stoeck, J Yelton, P Rubin, C Cawlfield, BI Eisenstein, GD Gollin, I Karliner, D Kim, N Lowrey, P Naik, C Sedlack, M Selen, JJ Thaler, J Williams, J Wiss, KW Edwards, D Besson, KY Gao, DT Gong, Y Kubota, SZ Li, R Poling, AW Scott, A Smith, CJ Stepaniak, Z Metreveli, KK Seth, A Tomaradze, P Zweber, J Ernst, AH Mahmood, H Severini, DM Asner, SA Dytman, S Mehrabyan, JA Mueller, V Savinov, Z Li, A Lopez, H Mendez, J Ramirez, GS Huang, DH Miller, V Pavlunin, B Sanghi, EI Shibata, IPJ Shipsey, GS Adams, M Chasse, JP Cummings, I Danko, J Napolitano, D Cronin-Hennessy, CS Park, W Park, JB Thayer, EH Thorndike, TE Coan, YS Gao, F Liu, M Artuso, C Boulahouache, S Blusk, J Butt, E Dambasuren, O Dorjkhaidav, N Menaa, R Mountain, H Muramatsu, R Nandakumar, R Redjimi, R Sia, T Skwarnicki, S Stone, JC Wang, K Zhang, SE Csorna, G Bonvicini, D Cinabro, M Dubrovin, RA Briere, GP Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins

51ÁÔÆæÈë¿Ú of the semileptonic charm decays D 0 → Ï€ - â„“ + v and D 0 → K - â„“ + v

Physical Review Letters 94:1 (2005)

Authors:

GS Huang, DH Miller, V Pavlunin, B Sanghi, EI Shibata, IPJ Shipsey, GS Adams, M Chasse, JP Cummings, I Danko, J Napolitano, D Cronin-Hennessy, CS Park, W Park, JB Thayer, EH Thorndike, TE Coan, YS Gao, F Liu, R Stroynowski, M Artuso, C Boulahouache, S Blusk, J Butt, E Dambasuren, O Dorjkhaidav, N Menaa, R Mountain, H Muramatsu, R Nandakumar, R Redjimi, R Sia, T Skwarnicki, S Stone, JC Wang, K Zhang, AH Mahmood, SE Csorna, G Bonvicini, D Cinabro, M Dubrovin, A Bornheim, E Lipeles, SP Pappas, AJ Weinstein, RA Briere, GP Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins, NE Adam, JP Alexander, K Berkelman, DG Cassel, JE Duboscq, KM Ecklund, R Ehrlich, L Fields, RS Galik, L Gibbons, B Gittelman, R Gray, SW Gray, DL Hartill, BK Heltsley, D Hertz, L Hsu, CD Jones, J Kandaswamy, DL Kreinick, VE Kuznetsov, H Mahlke-Krüger, TO Meyer, PUE Onyisi, JR Patterson, TK Pedlar, D Peterson, J Pivarski, D Riley, JL Rosner, A Ryd, AJ Sadoff, H Schwarthoff, MR Shepherd, WM Sun, JG Thayer, D Urner, T Wilksen, M Weinberger, SB Athar, P Avery, L Breva-Newell, R Patel, V Potlia, H Stoeck, J Yelton, P Rubin, C Cawlfield, BI Eisenstein

Abstract:

We investigate the decays D 0 → Ï€ - â„“ + v and D 0 → K - â„“ ++ v, where â„“ is e or μ, using approximately 7 fb -1 of data collected with the CLEO III detector. We find R 0 ≡ ℬ(D 0 → Ï€ -- e +±¹)/ℬ(¶Ù 0 → K - e + v) = 0.082 ± 0.006 ± 0.005. Fits to the kinematic distributions of the data provide parameters describing the form factor of each mode. Combining the form factor results and R 0 gives |f + Ï€(0)| 2|V cd| 2/|f + K(0)| 2|V cs| 2 = 0.038 -0.007-0.003 +0.006+0.005. © 2005 The American Physical Society.