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Search for ZZ and ZW production in pp̄ collisions at s=1.96TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 71:9 (2005) 1-7

Authors:

D Acosta, J Adelman, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, T Arisawa, JF Arguin, A Artikov, W Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, GJ Barker, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, J Bellinger, E Ben-Haim, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, G Bolla, A Bolshov, PSL Booth, D Bortoletto, J Boudreau, S Bourov, B Brau, C Bromberg, E Brubaker, J Budagov, HS Budd, K Burkett, G Busetto, P Bussey, KL Byrum, S Cabrera, M Campanelli, M Campbell, A Canepa, M Casarsa, D Carlsmith, S Carron, R Carosi, M Cavalli-Sforza, A Castro, P Catastini, D Cauz, A Cerri, L Cerrito, J Chapman, C Chen, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, I Cho, K Cho, D Chokheli, JP Chou, ML Chu, S Chuang, JY Chung, WH Chung, YS Chung, CI Ciobanu, MA Ciocci, AG Clark, D Clark, M Coca, A Connolly

Abstract:

We present a search for ZZ and ZW vector boson pair production in pp̄ collisions at s=1.96TeV using the leptonic decay channels ZZ→llνν, ZZ→lll′l′, and ZW→lll′ν. In a data sample corresponding to an integrated luminosity of 194pb-1 collected with the Collider Detector at Fermilab, 3 candidate events are found with an expected background of 1.0±0.2 events. We set a 95% confidence level upper limit of 15.2pb on the cross section for ZZ plus ZW production, compared to the standard model prediction of 5.0±0.4pb. © 2005 The American Physical Society.
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Improved measurement of the form factors in the decay lambda+c-->lambda + nue.

Physical review letters 94:19 (2005) 191801

Authors:

JW Hinson, GS Huang, J Lee, DH Miller, V Pavlunin, R Rangarajan, B Sanghi, EI Shibata, IPJ Shipsey, 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, E Dambasuren, O Dorjkhaidav, R Mountain, H Muramatsu, R Nandakumar, T Skwarnicki, S Stone, JC Wang, SE Csorna, I Danko, G Bonvicini, D Cinabro, M Dubrovin, S McGee, A Bornheim, E Lipeles, SP Pappas, A Shapiro, WM Sun, AJ Weinstein, RA Briere, GP Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins, NE Adam, JP Alexander, K Berkelman, V Boisvert, DG Cassel, JE Duboscq, KM Ecklund, R Ehrlich, RS Galik, L Gibbons, B Gittelman, SW Gray, DL Hartill, BK Heltsley, L Hsu, CD Jones, J Kandaswamy, DL Kreinick, A Magerkurth, H Mahlke-Krüger, TO Meyer, NB Mistry, JR Patterson, D Peterson, J Pivarski, SJ Richichi, D Riley, AJ Sadoff, H Schwarthoff, MR Shepherd, JG Thayer, D Urner, T Wilksen, A Warburton, M Weinberger, SB Athar, P Avery, L Breva-Newell, V Potlia, H Stoeck, J Yelton, K Benslama, C Cawlfield, BI Eisenstein, GD Gollin, I Karliner, N Lowrey, C Plager, C Sedlack, M Selen, JJ Thaler, J Williams, KW Edwards, D Besson, S Anderson, VV Frolov, DT Gong, Y Kubota, SZ Li, R Poling, A Smith, CJ Stepaniak, J Urheim, Z Metreveli, KK Seth, A Tomaradze, P Zweber, S Ahmed, MS Alam, J Ernst, L Jian, M Saleem, F Wappler, K Arms, E Eckhart, KK Gan, C Gwon, K Honscheid, H Kagan, R Kass, TK Pedlar, E von Toerne, H Severini, P Skubic, SA Dytman, JA Mueller, S Nam, V Savinov, CLEO Collaboration

Abstract:

Using the CLEO detector at the Cornell Electron Storage Ring, we have studied the distribution of kinematic variables in the decay lambda(+)(c)lambda--> e(+)nu(e). By performing a four-dimensional maximum likelihood fit, we determine the form factor ratio, R= f(2)/f(1) = -0.31 +/- 0.05(stat) +/- 0.04(syst), the pole mass, M(pole) = [2.21 +/- 0.08(stat) +/- 0.14(syst)] GeV/c(2), and the decay asymmetry parameter of the lambda(+)(c), alpha (lambda(c)) = -0.86 +/-0.03(stat) +/- 0.02(syst), for q(2) = 0.67 (GeV/c(2))(2). We compare the angular distributions of the lambda(+)(c) and lambda(-)(c) and find no evidence for CP violation: A(lambda(c)) = (alpha(lambda(c)) + alpha (lambda(c)))/(alpha(lambda(c))-alpha(lambda(c))) = 0.00 +/- 0.03(stat) +/- 0.01(syst) +/- 0.02, where the third error is from the uncertainty in the world average of the CP-violating parameter, A(lambda), for ppi(-).
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The effect of highly ionising particles on the CMS silicon strip tracker

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 543:2-3 (2005) 463-482

Authors:

W Adam, T Bergauer, M Friedl, R Fruehwirth, J Hrubec, M Krammer, M Pernicka, W Waltenberger, W Beaumont, E de Langhe, E de Wolf, M Tasevsky, O Bouhali, B Clerbaux, G de Lentdecker, J-P Dewulf, L Neuckermans, C Vander-Velde, P Vanlaer, J Wickens, J D’Hondt, R Goorens, J Heyninck, S Lowette, S Tavernier, L Van Lancker, C Yu, S Assouak, J-L Bonnet, G Bruno, B De-Callatay, J De-Favereau-de-Jeneret, C Delaere, S De-Visscher, D Favart, G Gregoire, Th Keutgen, G Leibenguth, V Lemaitre, D Michotte, O Militaru, A Ninane, S Ovyn, K Piotrzkowski, V Roberfroid, X Rouby, O Van-der-Aa, M Vander-Donckt, I Boulogne, E Daubie, F Defontaines, P Herquet, S Czellar, J Härkönen, V Karimäki, H Katajisto, T Linden, P Luukka, T Lampen, T Mäenpää, E Tuominen, J Tuominiemi, T Tuuva, M Ageron, E Chabanat, D Contardo, N Estre, R Haroutunian, N Lumb, L Mirabito, S Perries, B Trocme, R Blaes, F Charles, F Drouhin, JP Ernenwein, JC Fontaine, JD Berst, JM Brom, F Didierjean, U Goerlach, L Gross, P Juillot, A Lounis, C Maazouzi, C Olivetto, R Strub, P Vanhove, D Vintache, R Adolphi, R Brauer, W Braunschweig, H Esser, L Feld, A Heister, W Karpinski, K Klein, S König, C Kukulies, J Olzem, A Ostaptchouk, D Pandoulas, G Pierschel, F Raupach, S Schael, A Schultz von Dratzig, G Schwering, R Siedling, M Thomas, M Wlochal, F Beissel, K-D Boffin, M Duda, A Flossdorf, G Flugge, T Franke, K Hangarter, B Hegner, Th Hermanns, S Kasselmann, Th Kress, A Linn, J Mnich, A Nowack, M Poettgens, O Pooth, B Reinhold, M Bleyl, U Holm, R Klanner, U Pein, P Schleper, N Schirm, G Steinbrück, M Stoye, S Tesch, R van Staa, K Wick, B Atz, T Barvich, P Blum, W de Boer, F Boegelspacher, G Dirkes, M Fahrer, J Fernandez, M Frey, A Furgeri, E Grigoriev, F Hartmann, S Heier, T Muller, T Ortega-Gomez, H-J Simonis, P Steck, A Theel, T Weiler, V Zhukov, D Creanza, N De Filippis, M de Palma, G De Robertis, L Fiore, D Giordano, G Maggi, M Mennea, S My, V Radicci, G Selvaggi, L Silvestris, P Tempesta, G Zito, S Albergo, V Bellini, M Chiorboli, S Costa, R Potenza, C Sutera, A Tricomi, C Tuvè, A Bocci, V Ciulli, C Civinini, R D’Alessandro, E Focardi, G Landi, A Macchiolo, N Magini, S Mersi, C Marchettini, M Meschini, S Paoletti, G Parrini, R Ranieri, M Sani, N Bacchetta, D Bisello, A Candelori, T Dorigo, P Giubilato, A Kaminsky, M Loreti, M Nigro, A Paccagnella, R Rando, MM Angarano, E Babucci, D Benedetti, M Biasini, GM Bilei, MT Brunetti, B Checcucci, N Dinu, L Fanò, M Giorgi, P Lariccia, G Mantovani, V Postolache, M Puscalau, D Ricci, R Santinelli, A Santocchia, L Servoli, C Zucchetti, P Azzurri, G Bagliesi, A Basti, J Bernardini, T Boccali, L Borrello, F Bosi, R Castaldi, M D’Alfonso, R Dell’Orso, S Dutta, L Foa, S Gennai, A Giammanco, A Giassi, T Lomtadze, B Mangano, A Messineo, A Moggi, F Palla, F Palmonari, F Raffaelli, A Rizzi, D Rizzi, G Segneri, D Sentenac, G Sguazzoni, P Spagnolo, G Tonelli, PG Verdini, C Biino, M Costa, N Demaria, G Favro, P Trapani, C Peroni, A Romero, E Migliore, D Abbaneo, F Ahmed, P Bartalini, N Bernardino-Rodriguez, H Breuker, O Buchmuller, E Carrone, A Cattai, R Chierici, S Cucciarelli, A Dierlamm, M Eppard, A Frey, K Gill, R Grabit, A Honma, M Huhtinen, G Magazzu, M Mannelli, A Marchioro, A Onnela, B Perea-Solano, P Petagna, H Postema, M Risoldi, G Rolandi, P Siegrist, I Troska, A Tsirou, F Vasey, M Weber, B Wittmer, W Bertl, K Gabathuler, R Horisberger, H-Ch Kästli, D Kotlinski, A MacPherson, T Rohe, K Freudenreich, W Lustermann, F Pauss, R Eichler, W Erdmann, C Grab, A Schoning, C Amsler, V Chiochia, A Dorokhov, C Hörmann, H Pruys, K Prokofiev, C Regenfus, P Robmann, T Speer, KW Bell, J Coughlan, M French, R Halsall, L Jones, M Pearson, G Rogers, I Tomalin, R Bainbridge, P Barrillon, D Colling, S Dris, C Foudas, J Fulcher, G Hall, G Iles, J Jones, J Leaver, BC Macevoy, M Noy, DM Raymond, M Takahashi, O Zorba, B Barnett, C-Y Chien, DW Kim, G Liang, M Swartz, M Atac, M Demarteau, U Joshi, S Kwan, L Spiegel, S Tkaczyk, CE Gerber, E Shabalina, T Ten, R Lander, D Pellett, B Gobbi, M Kubantsev, S Malik, R Tilden, P Baringer, A Bean, L Christofek, D Coppage, TA Bolton, R Demina, WE Kahl, A Khanov, S Korjenevski, N Pukhaeva, NW Reay, F Rizatdinova, RA Sidwell, NR Stanton, L Cremaldi, D Sanders, E Bartz, J Doroshenko, T Koeth, L Perera, S Schnetzer, R Stone, S Worm, P Gartung, GG Hanson, GY Jeng, G Páztor, R Eusebi, E Halkiadakis, A Hocker, P Tipton, A Affolder, C Campagnari, D Hale, J Incandela, S Kyre, J Lamb, R Taylor, D White, G Bolla, D Bortoletto, A Garfinkel, C Rott, A Roy
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Limits on neutral D mixing in semileptonic decays

Physical Review D American Physical Society (APS) 71:7 (2005) 077101

Authors:

C Cawlfield, BI Eisenstein, GD Gollin, I Karliner, D Kim, N Lowrey, P Naik, C Sedlack, M Selen, J Williams, J Wiss, KW Edwards, D Besson, TK Pedlar, D Cronin-Hennessy, KY Gao, DT Gong, Y Kubota, T Klein, BW Lang, SZ Li, R Poling, AW Scott, A Smith, S Dobbs, Z Metreveli, KK Seth, A Tomaradze, P Zweber, J Ernst, AH Mahmood, K Arms, KK Gan, 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, Q He, H Muramatsu, CS Park, W Park, EH Thorndike, TE Coan, YS Gao, F Liu, R Stroynowski, M Artuso, C Boulahouache, S Blusk, J Butt, E Dambasuren, O Dorjkhaidav, J Li, N Menaa, R Mountain, R Nandakumar, R Redjimi, R Sia, T Skwarnicki, S Stone, JC Wang, K Zhang, SE Csorna, G Bonvicini, D Cinabro, M Dubrovin, S McGee, A Bornheim, SP Pappas, AJ Weinstein, HN Nelson, RA Briere, GP Chen, J Chen, T Ferguson, G Tatishvili, H Vogel, ME Watkins, JL Rosner, NE Adam, JP Alexander, K Berkelman, DG Cassel, V Crede, JE Duboscq, KM Ecklund, R Ehrlich, L Fields, 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, MR Shepherd, S Stroiney, WM Sun, D Urner, T Wilksen, M Weinberger, SB Athar, P Avery, L Breva-Newell, R Patel, V Potlia, H Stoeck, J Yelton, P Rubin
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Measurement of the tt̄ production cross section in pp̄ collisions at √s=1:96 TeV using kinematic fitting of b-tagged lepton+jet events

Physical Review D - Particles, Fields, Gravitation and Cosmology 71:7 (2005) 1-11

Authors:

D Acosta, J Adelman, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, T Arisawa, JF Arguin, A Artikov, W Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, GJ Barker, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, J Bellinger, E Ben-Haim, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, G Bolla, A Bolshov, PSL Booth, D Bortoletto, J Boudreau, S Bourov, C Bromberg, E Brubaker, J Budagov, HS Budd, K Burkett, G Busetto, P Bussey, KL Byrum, S Cabrera, P Calafiura, M Campanelli, M Campbell, A Canepa, M Casarsa, D Carlsmith, S Carron, R Carosi, M Cavalli-Sforza, A Castro, P Catastini, D Cauz, A Cerri, C Cerri, L Cerrito, J Chapman, C Chen, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, I Cho, K Cho, D Chokheli, ML Chu, S Chuang, JY Chung, WH Chung, YS Chung, CI Ciobanu, MA Ciocci, AG Clark, D Clark, M Coca, A Connolly

Abstract:

We report a measurement of the tt̄ production cross section using the CDF II detector at the Fermilab Tevatron. The data consist of events with an energetic electron or muon, missing transverse energy, and three or more hadronic jets, at least one of which is identified as a b-quark jet by reconstructing a secondary vertex. The background fraction is determined from a fit of the transverse energy of the leading jet. Using 162 ± 10 pb -1 of data, the total cross section is found to be 6.0 ± 1.6(stat.) ± 1.2(syst.) pb, which is consistent with the standard model prediction. © 2005 The American Physical Society.
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