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Limits on light gravitino production and new processes with large missing transverse energy in p&pmacr; collisions at sqrt

Physical review letters 85:7 (2000) 1378-1383

Authors:

J Tseng, N Turini, F Ukegawa, T Vaiciulis, J Valls, S Vejcik, G Velev, R Vidal, R Vilar, I Volobouev, D Vucinic, RG Wagner, RL Wagner, J Wahl, NB Wallace, AM Walsh, C Wang, CH Wang, MJ Wang, T Watanabe, D Waters, T Watts, R Webb, H Wenzel, WC Wester, AB Wicklund

Abstract:

Events collected by the Collider Detector at Fermilab (CDF) with an energetic jet plus large missing transverse energy can be used to search for physics beyond the standard model. We see no deviations from the expected backgrounds and set upper limits on the production of new processes. We consider in addition the production of light gravitinos and set a limit at 95% confidence level on the breaking scale sqrt[F]>/=217 GeV, which excludes gravitino masses smaller than 1.1x10(-5) eV/c(2).
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Measurement of the W Boson Mass with the Collider Detector at Fermilab

ArXiv hep-ex/0007044 (2000)
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Results from a new combined test of an electromagnetic liquid argon calorimeter with a hadronic scintillating-tile calorimeter

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 449:3 (2000) 461-477

Authors:

S Akhmadaliev, F Albiol, P Amaral, G Ambrosini, A Amorim, K Anderson, ML Andrieux, B Aubert, E Augé, F Badaud, L Baisin, F Barreiro, G Battistoni, A Bazan, K Bazizi, C Bee, J Belorgey, A Belymam, D Benchekroun, S Berglund, JC Berset, G Blanchot, A Bogush, C Bohm, V Boldea, W Bonivento, P Borgeaud, O Borisov, M Bosman, N Bouhemaid, D Breton, P Brette, C Bromberg, J Budagov, S Burdin, L Caloba, F Camarena, DV Camin, B Canton, M Caprini, J Carvalho, P Casado, R Cases, MV Castillo, D Cavalli, M Cavalli-Sforza, V Cavasinni, R Chadelas, M Chalifour, L Chekhtman, JL Chevalley, I Chirikov-Zorin, G Chlachidze, JC Chollet, M Citterio, WE Cleland, C Clement, M Cobal, F Cogswell, J Colas, J Collot, S Cologna, S Constantinescu, G Costa, D Costanzo, JP Coulon, M Crouau, P Dargent, F Daudon, M David, T Davidek, J Dawson, K De, E Delagnes, C de la Taille, J Del Peso, T Del Prete, P de Saintignon, B di Girolamo, B Dinkespiller, S Dita, F Djama, J Dodd, J Dolejsi, Z Dolezal, R Downing, JJ Dugne, PY Duval, D Dzahini, I Efthymiopoulos, D Errede, S Errede, F Etienne, H Evans, G Eynard, F Farida, P Fassnacht, N Fedyakin, J de Fernandez Troconiz, A Ferrari

Abstract:

A new combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 10 to 300 GeV at an incident angle θ of about 12° is well described by the expression σ/E = ((41.9 ± 1.6)%/√E + (1.8 ± 0.1)%)⊕(1.8 ± 0.1)/E, where E is in GeV. The response to electrons and muons was evaluated. Shower profiles, shower leakage and the angular resolution of hadronic showers were also studied. Results are compared with those from the previous beam test.
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Measurement of the Decay Amplitudes of B0 --> J/psi K* and B0s --> J/psi phi Decays

ArXiv hep-ex/0007034 (2000)
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Spin correlation in tt̄ production from pp̄ collisions at √s = 1.8 TeV

Physical Review Letters 85:2 (2000) 256-261

Authors:

B Abbott, M Abolins, V Abramov, BS Acharya, DL Adams, M Adams, V Akimov, GA Alves, N Amos, EW Anderson, MM Baarmand, VV Babintsev, L Babukhadia, A Baden, B Baldin, S Banerjee, J Bantly, E Barberis, P Baringer, JF Bartlett, U Bassler, A Bean, A Belyaev, SB Beri, G Bernardi, I Bertram, VA Bezzubov, PC Bhat, V Bhatnagar, M Bhattacharjee, G Blazey, S Blessing, A Boehnlein, NI Bojko, F Borcherding, A Brandt, R Breedon, G Briskin, R Brock, G Brooijmans, A Bross, D Buchholz, V Buescher, VS Burtovoi, JM Butler, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, KM Chan, SV Chekulaev, W Chen, DK Cho, S Choi, S Chopra, BC Choudhary, JH Christenson, M Chung, D Claes, AR Clark, WG Cobau, J Cochran, L Coney, B Connolly, WE Cooper, D Coppage, D Cullen-Vidal, MAC Cummings, D Cutts, OI Dahl, K Davis, K De, K del Signore, M Demarteau, D Denisov, SP Denisov, HT Diehl, M Diesburg, G di Loreto, P Draper, Y Ducros, LV Dudko, SR Dugad, A Dyshkant, D Edmunds, J Ellison, VD Elvira, R Engelmann, S Eno, G Eppley, P Ermolov, OV Eroshin, J Estrada, H Evans, VN Evdokimov, T Fahland, S Feher, D Fein, T Ferbel

Abstract:

An analytical study was carried out to account for spin correlation effects in the production of tt̄ pairs in pp̄ collisions at √s=1.8 TeV. It was found that κ > -0.25 at the 68% confidence level.
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