Dr Elizabeth Gallas: Publications

Search for trilepton signatures from associated gaugino pair production

Physical Review Letters 80:8 (1998) 1591-1596

Authors:

B Abbott, M Abolins, BS Acharya, I Adam, DL Adams, M Adams, S Ahn, H Aihara, GA Alves, N Amos, EW Anderson, R Astur, MM Baarmand, A Baden, V Balamurali, J Balderston, B Baldin, S Banerjee, J Bantly, E Barberis, JF Bartlett, K Bazizi, A Belyaev, SB Beri, I Bertram, VA Bezzubov, PC Bhat, V Bhatnagar, M Bhattacharjee, N Biswas, G Blazey, S Blessing, P Bloom, A Boehnlein, NI Bojko, F Borcherding, C Boswell, A Brandt, R Brock, A Bross, D Buchholz, VS Burtovoi, JM Butler, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, SM Chang, SV Chekulaev, LP Chen, W Chen, S Choi, S Chopra, BC Choudhary, JH Christenson, M Chung, D Claes, AR Clark, WG Cobau, J Cochran, L Coney, WE Cooper, C Cretsinger, 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, D Edmunds, J Ellison, VD Elvira, R Engelmann, S Eno, G Eppley, P Ermolov, OV Eroshin, VN Evdokimov, T Fahland, MK Fatyga, S Feher, D Fein, T Ferbel, G Finocchiaro, HE Fisk, Y Fisyak, E Flattum, GE Forden

Abstract:

We report on a search for the trilepton decay signature from the associated production of supersymmetric gaugino pairs, χ∼±1χ∼02, within the context of minimal supersymmetric models that conserve R parity. This search uses 95 pb−1 of pp− data taken at s = 1.8 TeV with the D0 detector. No evidence of a trilepton signature has been found, and a limit on the product of cross section times branching fraction to trileptons is given as a function of χ∼±1 mass. © 1998 The American Physical Society.

Evaluation of fermi read-out of the atlas tilecal prototype

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 403:1 (1998) 98-114

Authors:

Z Ajaltouni, F Albiol, A Alifanov, P Amaral, D Amelin, A Amorim, K Anderson, C Angelini, S Agnvall, A Antola, F Astesan, A Astvatsaturov, D Autiero, F Badaud, G Barreira, R Benetta, S Berglund, G Blanchot, E Blueher, C Blaj, P Bodö, A Bogush, C Bohm, V Boldea, O Borisov, M Bosnian, N Bouhemaid, P Brette, L Breveglieri, C Bromberg, M Brossard, J Budagov, L Caloba, J Carvalho, P Casado, A Castera, PW Cattaneo, M Cavalli-Sforza, V Cavasinni, R Chadelas, JC Chevaleyre, I Chirikov-Zorin, G Chlachidze, M Cobal, F Cogswell, F Colaço, S Constantinescu, D Costanzo, M Crouau, L Dadda, F Daudon, J David, M David, T Davidek, J Dawson, K De, T Del Prete, A de Santo, B di Girolamo, S Dita, J Dolejsi, Z Dolezal, R Downing, JJ Dugne, I Efthymiopoulos, M Engström, D Errede, S Errede, H Evans, A Fenyuk, A Ferrer, A Fristedt, V Flaminio, E Gallas, M Gaspar, O Gildemeister, M Givoletto, V Glagolev, VG Goggi, A Gomes, S Gong, Y Gouz, V Grabsky, M Grieco, H Hakopian, M Haney, M Hansen, S Hellman, A Henriques, H Hentzell, T Holmberg, S Holmgren, PF Honoré, J Huston, Y Ivanyushenkov, K Jon-And, A Juste, S Kakurin, G Karapetian, A Karyukhin

Abstract:

Prototypes of the FERMI system have been used to read out a prototype of the ATLAS hadron calorimeter in a beam test at the CERN SPS. The FERMI read-out system, using a compressor and a sampling ADC, is compared to a standard charge integrating read-out by measuring the energy resolution of the calorimeter separately with the two systems on the same events. Signal processing techniques have been designed to optimize the treatment of FERMI data. The resulting energy resolution is better than the one obtained with the standard read-out. © 1998 Elsevier Science B.V. All rights reserved.

A measurement of the W Boson mass at the fermilab pp¯ Collider

Physical Review Letters 80:14 (1998) 3008-3013

Authors:

B Abbott, M Abolins, BS Acharya, I Adam, DL Adams, M Adams, S Ahn, H Aihara, GA Alves, N Amos, EW Anderson, R Astur, MM Baarmand, A Baden, V Balamurali, J Balderston, B Baldin, S Banerjee, J Bantly, E Barberis, JF Bartlett, K Bazizi, A Belyaev, SB Beri, I Bertram, VA Bezzubov, PC Bhat, V Bhatnagar, M Bhattacharjee, N Biswas, G Blazey, S Blessing, P Bloom, A Boehnlein, NI Bojko, F Borcherding, C Boswell, A Brandt, R Brock, A Bross, D Buchholz, VS Burtovoi, JM Butler, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, SM Chang, SV Chekulaev, LP Chen, W Chen, S Choi, S Chopra, BC Choudhary, JH Christenson, M Chung, D Claes, AR Clark, WG Cobau, J Cochran, L Coney, WE Cooper, C Cretsinger, 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, D Edmunds, J Ellison, VD Elvira, R Engelmann, S Eno, G Eppley, P Ermolov, OV Eroshin, VN Evdokimov, T Fahland, MK Fatyga, S Feher, D Fein, T Ferbel, G Finocchiaro, HE Fisk, Y Fisyak, E Flattum, GE Forden

Abstract:

We report a measurement of the W boson mass based on an integrated luminosity of 82pb^-1 from pp¯ collisions at √s = 1.8 TeV recorded in 1994-1995 by the D0 detector at the Fermilab Tevatron. We identify W bosons by their decays to ev and extract the mass by fitting the transverse mass spectrum from 28 323 W boson candidates. A sample of 3563 dielectron events, mostly due to Z → ee decays, constrains models of W boson production and the detector. We measure MW = 80.44 ± 0.10(stat) ± 0.07(syst) GeV. By combining this measurement with our result form the 1992-1993 data set, we obtain MW = 80.43 ± 0.11 GeV. © 1998 The American Physical Society.

Determination of the mass of the W boson using the D detector at the Fermilab Tevatron

Physical Review D Particles Fields Gravitation and Cosmology 58:1 (1998)

Authors:

B Abbott, M Abolins, BS Acharya, I Adam, DL Adams, M Adams, S Ahn, H Aihara, GA Alves, E Amidi, N Amos, EW Anderson, R Astur, MM Baarmand, A Baden, V Balamurali, J Balderston, B Baldin, S Banerjee, J Bantly, E Barberis, JF Bartlett, K Bazizi, A Belyaev, SB Beri, I Bertram, VA Bezzubov, PC Bhat, V Bhatnagar, M Bhattacharjee, N Biswas, G Blazey, S Blessing, P Bloom, A Boehnlein, NI Bojko, F Borcherding, C Boswell, A Brandt, R Brock, A Bross, D Buchholz, VS Burtovoi, JM Butler, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, SM Chang, SV Chekulaev, LP Chen, W Chen, S Choi, S Chopra, BC Choudhary, JH Christenson, M Chung, D Claes, AR Clark, WG Cobau, J Cochran, WE Cooper, C Cretsinger, D Cullen-Vidal, MAC Cummings, D Cutts, OI Dahl, K Davis, K De, K Del Signore, M Demarteau, N Denisenko, D Denisov, SP Denisov, HT Diehl, M Diesburg, G Di Loreto, P Draper, Y Ducros, LV Dudko, SR Dugad, D Edmunds, J Ellison, VD Elvira, R Engelmann, S Eno, G Eppley, P Ermolov, OV Eroshin, VN Evdokimov, T Fahland, M Fatyga, MK Fatyga, S Feher, D Fein, T Ferbel, G Finocchiaro, HE Fisk, Y Fisyak

Abstract:

A measurement of the mass of the [Formula Presented] boson is presented which is based on a sample of 5982 [Formula Presented] decays observed in [Formula Presented] collisions at [Formula Presented] TeV with the D detector during the 1992–1993 run. From a fit to the transverse mass spectrum, combined with measurements of the [Formula Presented] boson mass, the [Formula Presented] boson mass is measured to be [Formula Presented] Detailed discussions of the determination of the absolute energy scale, the measured efficiencies, and all systematic uncertainties are presented. © 1998 The American Physical Society.

Direct measurement of the top quark mass by the DØ Collaboration

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

Authors:

Abstract:

We determine the top quark mass [Formula Presented] using [Formula Presented] pairs produced in the DØ detector by [Formula Presented] [Formula Presented] collisions in a [Formula Presented] exposure at the Fermilab Tevatron. We make a two constraint fit to [Formula Presented] in [Formula Presented] final states with one W boson decaying to [Formula Presented] and the other to [Formula Presented] or [Formula Presented] Likelihood fits to the data yield [Formula Presented] When this result is combined with an analysis of events in which both W bosons decay into leptons, we obtain [Formula Presented] An alternate analysis, using three constraint fits to fixed top quark masses, gives [Formula Presented] consistent with the above result. Studies of kinematic distributions of the top quark candidates are also presented. 14.65.Ha, 13.85.Ni, 13.85.Qk. © 1998 The American Physical Society.

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