Accelerator Neutrinos

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Limits on quark compositeness from high energy jets in p̄p collisions at 1.8 TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 62:3 (2000) 1-6

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, M Buehler, V Buescher, VS Burtovoi, JM Butler, F Canelli, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, KM Chan, SV Chekulaev, DK Cho, S Choi, S Chopra, BC Choudhary, JH Christenson, M Chung, D Claes, AR Clark, 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, S Doulas, 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

Abstract:

Events in p̄p collisions at √s= 1.8 TeV with total transverse energy exceeding 500 GeV are used to set limits on quark substructure. The data are consistent with next-to-leading order QCD calculations. We set a lower limit of 2.0 TeV at 95% confidence on the energy scale ΛLL for compositeness in quarks, assuming a model with a left-left isoscalar contact interaction term. The limits on ΛLL are found to be insensitive to the sign of the interference term in the Lagrangian. ©2000 The American Physical Society.
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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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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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Determination of gamma/Z interference in e+e- annihilation at LEP

ArXiv hep-ex/0007006 (2000)
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Production of Single W Bosons at \sqrt{s}=189 GeV and Measurement of WWgamma Gauge Couplings

ArXiv hep-ex/0007005 (2000)
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