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Search for the flavor-changing neutral current decays B+ → μ+μ-K+ and B0 → μ+μ-K*0

PHYSICAL REVIEW LETTERS 83:17 (1999) 3378-3383

Authors:

T Affolder, H Akimoto, A Akopian, MG Albrow, P Amaral, SR Amendolia, D Amidei, J Antos, G Apollinari, T Arisawa, T Asakawa, W Ashmanskas, M Atac, P Azzi-Bacchetta, N Bacchetta, MW Bailey, S Bailey, P de Barbaro, A Barbaro-Galtieri, VE Barnes, BA Barnett, M Barone, G Bauer, F Bedeschi, S Belforte, G Bellettini, J Bellinger, D Benjamin, J Bensinger, A Beretvas, JP Berge, J Berryhill, S Bertolucci, B Bevensee, A Bhatti, C Bigongiari, M Binkley, D Bisello, RE Blair, C Blocker, K Bloom, S Blusk, A Bocci, A Bodek, W Bokhari, G Bolla, Y Bonushkin, D Bortoletto, J Boudreau, A Brandl, S van den Brink, C Bromberg, N Bruner, E Buckley-Geer, J Budagov, HS Budd, K Burkett, G Busetto, A Byon-Wagner, KL Byrum, M Campbell, A Caner, W Carithers, J Carlson, D Carlsmith, J Cassada, A Castro, D Cauz, A Cerri, PS Chang, PT Chang, J Chapman, C Chen, YC Chen, MT Cheng, M Chertok, G Chiarelli, I Chirikov-Zorin, G Chlachidze, F Chlebana, L Christofek, ML Chu, S Cihangir, CI Ciobanu, AG Clark, M Cobal, E Cocca, A Connolly, J Conway, J Cooper, M Cordelli, JG da Costa, D Costanzo, D Cronin-Hennessy, R Cropp, R Culbertson, D Dagenhart, F DeJongh, S Dell'Agnello, M Dell'Orso, R Demina, L Demortier, M Deninno, PF Derwent, T Devlin, JR Dittmann, S Donati, J Done, T Dorigo, N Eddy, K Einsweiler, JE Elias, E Engels, W Erdmann, D Errede, S Errede, Q Fan, RG Feild, C Ferretti, I Fiori, B Flaugher, GW Foster, M Franklin, J Freeman, J Friedman, H Frisch, Y Fukui, S Gadomski, S Galeotti, M Gallinaro, T Gao, M Garcia-Sciveres, AF Garfinkel, P Gatti, C Gay, S Geer, DW Gerdes, P Giannetti, P Giromini, V Glagolev, M Gold, J Goldstein, A Gordon, AT Goshaw, Y Gotra, K Goulianos, H Grassmann, C Green, L Groer, C Grosso-Pilcher, M Guenther, G Guillian, RS Guo, C Haber, E Hafen, SR Hahn, C Hall, T Handa, R Handler, W Hao, F Happacher, K Hara, AD Hardman, RM Harris, F Hartmann, K Hatakeyama, J Hauser, J Heinrich, A Heiss, B Hinrichsen, KD Hoffman, C Holck, R Hollebeek, L Holloway, R Hughes, J Huston, J Huth, H Ikeda, M Incagli, J Incandela, G Introzzi, J Iwai, Y Iwata, E James, H Jensen, M Jones, U Joshi, H Kambara, T Kamon, T Kaneko, K Karr, H Kasha, Y Kato, TA Keaffaber, K Kelley, M Kelly, RD Kennedy, R Kephart, D Khazins, T Kikuchi, M Kirk, BJ Kim, HS Kim, SH Kim, YK Kim, L Kirsch, S Klimenko, D Knoblauch, P Koehn, A Köngeter, K Kondo, J Konigsberg, K Kordas, A Korytov, E Kovacs, J Kroll, M Kruse, SE Kuhlmann, K Kurino, T Kuwabara, AT Laasanen, N Lai, S Lami, S Lammel, JI Lamoureux, M Lancaster, G Latino, T LeCompte, AM Lee, S Leone, JD Lewis, M Lindgren, TM Liss, JB Liu, YC Liu, N Lockyer, M Loreti, D Lucchesi, P Lukens, S Lusin, J Lys, R Madrak, K Maeshima, P Maksimovic, L Malferrari, M Mangano, M Mariotti, G Martignon, A Martin, JAJ Matthews, P Mazzanti, KS McFarland, P McIntyre, E McKigney, M Menguzzato, A Menzione, E Meschi, C Mesropian, C Miao, T Miao, R Miller, JS Miller, H Minato, S Miscetti, M Mishina, N Moggi, E Moore, R Moore, Y Morita, A Mukherjee, T Muller, A Munar, P Murat, S Murgia, M Musy, J Nachtman, S Nahn, H Nakada, T Nakaya, I Nakano, C Nelson, D Neuberger, C Newman-Holmes, CYP Ngan, P Nicolaidi, H Niu, L Nodulman, A Nomerotski, SH Oh, T Ohmoto, T Ohsugi, R Oishi, T Okusawa, J Olsen, C Pagliarone, F Palmonari, R Paoletti, V Papadimitriou, SP Pappas, A Parri, D Partos, J Patrick, G Pauletta, M Paulini, A Perazzo, L Pescara, TJ Phillips, G Piacentino, KT Pitts, R Plunkett, A Pompos, L Pondrom, G Pope, F Prokoshin, J Proudfoot, F Ptohos, G Punzi, K Ragan, D Reher, A Ribon, F Rimondi, L Ristori, WJ Robertson, A Robinson, T Rodrigo, S Rolli, L Rosenson, R Roser, R Rossin, WK Sakumoto, D Saltzberg, A Sansoni, L Santi, H Sato, P Savard, P Schlabach, EE Schmidt, MP Schmidt, M Schmitt, L Scodellaro, A Scott, A Scribano, S Segler, S Seidel, Y Seiya, A Semenov, F Semeria, T Shah, MD Shapiro, PF Shepard, T Shibayama, M Shimojima, M Shochet, J Siegrist, A Sill, P Sinervo, P Singh, AJ Slaughter, K Sliwa, C Smith, FD Snider, A Solodsky, J Spalding, T Speer, P Sphicas, F Spinella, M Spiropulu, L Spiegel, L Stanco, J Steele, A Stefanini, J Strologas, F Strumia, D Stuart, K Sumorok, T Suzuki, R Takashima, K Takikawa, M Tanaka, T Takano, B Tannenbaum, W Taylor, M Tecchio, PK Teng, K Terashi, S Tether, D Theriot, R Thurman-Keup, P Tipton, S Tkaczyk, K Tollefson, A Tollestrup, H Toyoda, W Trischuk, JF de Troconiz, S Truitt, J Tseng, N Turini, F Ukegawa, J Valls, S Vejcik, G Velev, R Vidal, R Vilar, I Vologouev, D Vucinic, RG Wagner, RL Wagner, J Wahl, NB Wallace, AM Walsh, C Wang, CH Wang, MJ Wang, T Watanabe, T Watts, R Webb, H Wenzel, WC Wester, AB Wicklund, E Wicklund, HH Williams, P Wilson, BL Winer, D Winn, S Wolbers, D Wolinski, J Wolinski, S Worm, X Wu, J Wyss, A Yagil, W Yao, GP Yeh, P Yeh, J Yoh, C Yosef, T Yoshida, I Yu, S Yu, A Zanetti, F Zetti, S Zucchelli
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TeV blazars: Status of observations

ASTROPHYS LETT COMM 39:1-6 (1999) 477-484

Authors:

F Krennrich, SD Biller, IH Bond, PJ Boyle, SM Bradbury, AC Breslin, JH Buckley, AM Burdett, JB Gordo, DA Carter-Lewis, M Catanese, MF Cawley, DJ Fegan, JP Finley, JA Gaidos, T Hall, AM Hillas, RC Lamb, RW Lessard, C Masterson, JE McEnery, G Mohanty, P Moriarty, J Quinn, AJ Rodgers, HJ Rose, FW Samuelson, GH Sembroski, R Srinivasan, VV Vassiliev, TC Weekes

Abstract:

The close relation between ground-based TeV observations and satellite borne gamma-ray measurements has been important for the understanding of blazars. The observations which involve the TeV component in blazar studies are reviewed.
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Observation of Bc mesons in pp̄ collisions at √s = 1.8 TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 58:11 (1998)

Authors:

F Abe, H Akimoto, A Akopian, MG Albrow, A Amadon, SR Amendolia, D Amidei, J Antos, S Aota, G Apollinari, T Arisawa, T Asakawa, W Ashmanskas, M Atac, P Azzi-Bacchetta, N Bacchetta, S Bagdasarov, MW Bailey, P de Barbaro, A Barbaro-Galtieri, VE Barnes, BA Barnett, M Barone, G Bauer, T Baumann, F Bedeschi, S Behrends, S Belforte, G Bellettini, J Bellinger, D Benjamin, J Bensinger, A Beretvas, JP Berge, J Berryhill, S Bertolucci, S Bettelli, B Bevensee, A Bhatti, K Biery, C Bigongiari, M Binkley, D Bisello, RE Blair, C Blocker, S Blusk, A Bodek, W Bokhari, G Bolla, Y Bonushkin, D Bortoletto, J Boudreau, L Breccia, C Bromberg, N Bruner, R Brunetti, E Buckley-Geer, HS Budd, K Burkett, G Busetto, A Byon-Wagner, KL Byrum, M Campbell, A Caner, W Carithers, D Carlsmith, J Cassada, A Castro, D Cauz, A Cerri, PS Chang, PT Chang, HY Chao, J Chapman, MT Cheng, M Chertok, G Chiarelli, CN Chiou, F Chlebana, L Christofek, ML Chu, S Cihangir, AG Clark, M Cobal, E Cocca, M Contreras, J Conway, J Cooper, M Cordelli, D Costanzo, C Couyoumtzelis, D Cronin-Hennessy, R Culbertson, D Dagenhart, T Daniels, F de Jongh, S dell'Agnello, M dell'Orso, R Demina, L Demortier

Abstract:

We report the observation of bottom-charmed mesons Bc ni 1.8 TeV pp̄ collisions using the CDF detector at the Fermilab Tevatron. The Bc mesons were found through their semileptonic decays, B±c → J/ψl± X. A fit to the J/ψl mass distribution yielded 20.4+6.2-5.5 events from Bc mesons. A test of the null hypothesis, i.e., an attempt to fit the data with background alone, was rejected at the level of 4.8 standard deviations. By studying the quality of the fit as a function of the assumed Bc mass, we determined M(Bc) = 6.40 ±0.39 (stat.)±0.13 (syst) GeV/c2. From the distribution of trilepton intersection points in the plane transverse to the beam direction we measure the Bc lifetime to be τ(Bc) = 0.46+0.18-0.16 (stat)±0.03 (syst) ps. We also measured the ratio of production cross section times branching fraction for B+c → J/ψl+ v relative to that for B+ → J/ψK+ to be σ(Bc)×B(B c→J/ψlv)/σ(B)×B(B→J/ψK) = 0.132+0.041-0.037 (stat)±0.031 (syst)+0.032-0.020(lifetime).
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Observation of B+ → ψ(2S)K+ and B0 → ψ(2S)K*(892)0 decays and measurements of B-meson branching fractions into J/ ψ and ψ(2S) final states

Physical Review D - Particles, Fields, Gravitation and Cosmology 58:7 (1998)

Authors:

F Abe, H Akimoto, A Akopian, MG Albrow, A Amadon, SR Amendolia, D Amidei, J Antos, S Aota, G Apollinari, T Arisawa, T Asakawa, W Ashmanskas, M Atac, P Azzi-Bacchetta, N Bacchetta, S Bagdasarov, MW Bailey, P de Barbaro, A Barbaro-Galtieri, VE Barnes, BA Barnett, M Barone, G Bauer, T Baumann, F Bedeschi, S Behrends, S Belforte, G Bellettini, J Bellinger, D Benjamin, J Bensinger, A Beretvas, JP Berge, J Berryhill, S Bertolucci, S Bettelli, B Bevensee, A Bhatti, K Biery, C Bigongiari, M Binkley, D Bisello, RE Blair, C Blocker, S Blusk, A Bodek, W Bokhari, G Bolla, Y Bonushkin, D Bortoletto, J Boudreau, L Breccia, C Bromberg, N Bruner, R Brunetti, E Buckley-Geer, HS Budd, K Burkett, G Busetto, A Byon-Wagner, KL Byrum, M Campbell, A Caner, W Carithers, D Carlsmith, J Cassada, A Castro, D Cauz, A Cerri, PS Chang, PT Chang, HY Chao, J Chapman, MT Cheng, M Chertok, G Chiarelli, CN Chiou, F Chlebana, L Christofek, ML Chu, S Cihangir, AG Clark, M Cobal, E Cocca, M Contreras, J Conway, J Cooper, M Cordelli, D Costanzo, C Couyoumtzelis, D Cronin-Hennessy, R Culbertson, D Dagenhart, T Daniels, F de Jongh, S dell'Agnello, M dell'Orso, R Demina, L Demortier

Abstract:

We report the observations of the decays B+ → ψ(2S)K+ and B0 → ψ(2S)K*(892)0 in pp̄ collisions at a center-of-mass energy of 1.8 TeV using a 110 pb-1 data sample recorded by the Collider Detector at Fermilab. We also reconstruct the decays B+ → J/ψK+ and B0 → J/ψK*(892)0 and measure the six ratios of branching fractions of these four decays. The relative branching-fraction results are shown to be consistent with phenomenological factorization calculations of hadronic B-meson decays. We use the world-average branching fraction ℬ(B+ → J/ψK+) to derive ℬ(B+ → ψ(2S)K+) = (0.56±0.08±0.10) × 10-3, ℬ(B0 → ψ(2S)K*(892)0) = (0.92±0.20±0.16) × 10-3, and ℬ(B0 → J/ψK*(892)0) = (1.78±0.14±0.29) × 10-3, where the first and second uncertainties are statistical and systematic, respectively.

Search for long-lived parents of Z0 bosons in pp̄ collisions at √s = 1.8 TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 58:5 (1998) 511021-511025

Authors:

F Abe, H Akimoto, A Akopian, MG Albrow, A Amadon, SR Amendolia, D Amidei, J Antos, S Aota, G Apollinari, T Arisawa, T Asakawa, W Ashmanskas, M Atac, P Azzi-Bacchetta, N Bacchetta, S Bagdasarov, MW Bailey, P de Barbaro, A Barbaro-Galtieri, VE Barnes, BA Barnett, M Barone, G Bauer, T Baumann, F Bedeschi, S Behrends, S Belforte, G Bellettini, J Bellinger, D Benjamin, J Bensinger, A Beretvas, JP Berge, J Berryhill, S Bertolucci, S Bettelli, B Bevensee, A Bhatti, K Biery, C Bigongiari, M Binkley, D Bisello, RE Blair, C Blocker, S Blusk, A Bodek, W Bokhari, G Bolla, Y Bonushkin, D Bortoletto, J Boudreau, L Breccia, C Bromberg, N Bruner, R Brunetti, E Buckley-Geer, HS Budd, K Burkett, G Busetto, A Byon-Wagner, KL Byrum, M Campbell, A Caner, W Carithers, D Carlsmith, J Cassada, A Castro, D Cauz, A Cerri, PS Chang, PT Chang, HY Chao, J Chapman, MT Cheng, M Chertok, G Chiarelli, CN Chiou, F Chlebana, L Christofek, ML Chu, S Cihangir, AG Clark, M Cobal, E Cocca, M Contreras, J Conway, J Cooper, M Cordelli, D Costanzo, C Couyoumtzelis, D Cronin-Hennessy, R Culbertson, D Dagenhart, T Daniels, F de Jongh, S dell'Agnello, M dell'Orso, R Demina, L Demortier

Abstract:

We search for new long-lived particles which decay to Z0 bosons by looking tor Z0→e+e- decays with displaced vertices. We find no evidence for parent particles of the Z0 with long lifetimes in 90 pb-1 of data from the CDF experiment at Fermilab. We set a cross section limit as a function of the lifetime of the parent particle for both a generic Z0 parent and a fourth-generation, charge -1/3 quark that decays into Z0b.
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