Dr Elizabeth Gallas: Publications

Measurement of the top quark pair production cross section in pp̄ collisions using multijet final states

Physical Review D - Particles, Fields, Gravitation and Cosmology 60:1 (1999) 1-26

Authors:

B Abbott, M Abolins, V Abramov, BS Acharya, I Adam, DL Adams, M Adams, S Ahn, H Aihara, 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, 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 Breedon, 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, 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, A Dyshkant, 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

Abstract:

We have studied tt̄ production using multijet final states in pp̄ collisions at a center-of-mass energy of 1.8 TeV, with an integrated luminosity of 110.3 pb-1. Each of the top quarks with these final states decays exclusively to a bottom quark and a W boson, with the W bosons decaying into quark-antiquark pairs. The analysis has been optimized using neural networks to achieve the smallest expected fractional uncertainty on the tt̄ production cross section, and yields a cross section of 7.1±2.8 (stat)±1.5 (syst) pb, assuming a top quark mass of 172.1 GeV/c2. Combining this result with previous DØ measurements, where one or both of the W bosons decay leptonically, gives a tt̄ production cross section of 5.9±1.2 (stat)±1.1 (syst) pb. ©1999 The American Physical Society.

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Determination of the absolute jet energy scale in the DO calorimeters

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 424:2 (1999) 352-394

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, L Babukhadia, A Baden, V Balamurali, J Balderston, B Baldin, S Banerjee, J Bantly, E Barberis, JF Bartlett, 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 Elvirai, R Engelmann, S Eno, G Eppley, P Ermolov, OV Eroshin, VN Evdokimov, T Fahland, MK Fatyga, S Feherg, D Fein, T Ferbel, G Finocchiaro, HE Fisk, Y Fisyak, E Flattum, GE Forden

Abstract:

The DO detector is used to study pp collisions at the 1800 and 630 GeV center-of-mass energies available at the Fermilab Tevatron. To measure jets, the detector uses a sampling calorimeter composed of uranium and liquid argon as the passive and active media, respectively, Understanding the jet energy calibration is not only crucial for precision tests of QCD, but also for the measurement of particle masses and the determination of physics backgrounds associated with new phenomena. This paper describes the energy calibration of jets observed with the DO detector at the two pp center-of-mass energies in the transverse energy and pseudorapidity range ET>8 GeV and |η|<3.

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Search for Nonstandard Higgs Bosons Using High Mass Photon Pairs in pp¯→γγ+2 Jets at √s=1.8 TeV

Physical Review Letters American Physical Society (APS) 82:11 (1999) 2244-2249

Authors:

B Abbott, M Abolins, V Abramov, B Acharya, I Adam, D Adams, M Adams, S Ahn, G Alves, N Amos, E Anderson, M Baarmand, V Babintsev, L Babukhadia, A Baden, B Baldin, S Banerjee, J Bantly, E Barberis, P Baringer, J Bartlett, A Belyaev, S Beri, I Bertram, V Bezzubov, P Bhat, V Bhatnagar, M Bhattacharjee, N Biswas, G Blazey, S Blessing, P Bloom, A Boehnlein, N Bojko, F Borcherding, C Boswell, A Brandt, R Breedon, G Briskin, R Brock, A Bross, D Buchholz, V Burtovoi, J Butler, W Carvalho, D Casey, Z Casilum, H Castilla-Valdez, D Chakraborty, S Chekulaev, W Chen, S Choi, S Chopra, B Choudhary, J Christenson, M Chung, D Claes, A Clark, W Cobau, J Cochran, L Coney, W Cooper, D Coppage, C Cretsinger, D Cullen-Vidal, M Cummings, D Cutts, O Dahl, K Davis, K De, K Del Signore, M Demarteau, D Denisov, S Denisov, H Diehl, M Diesburg, G Di Loreto, P Draper, Y Ducros, L Dudko, S Dugad, A Dyshkant, D Edmunds, J Ellison, V Elvira, R Engelmann, S Eno, G Eppley, P Ermolov, O Eroshin, V Evdokimov, T Fahland, M Fatyga, S Feher, D Fein, T Ferbel, H Fisk, Y Fisyak, E Flattum, G Forden, M Fortner, K Frame, S Fuess, E Gallas, A Galyaev, P Gartung, V Gavrilov, T Geld, R Genik, K Genser, C Gerber, Y Gershtein, B Gibbard, B Gobbi, B Gómez, G Gómez, P Goncharov, J González Solís, H Gordon, L Goss, K Gounder, A Goussiou, N Graf, P Grannis, D Green, H Greenlee, S Grinstein, P Grudberg, S Grünendahl, G Guglielmo, J Guida, J Guida, A Gupta, S Gurzhiev, G Gutierrez, P Gutierrez, N Hadley, H Haggerty, S Hagopian, V Hagopian, K Hahn, R Hall, P Hanlet, S Hansen, J Hauptman, C Hebert, D Hedin, A Heinson, U Heintz, R Hernández-Montoya, T Heuring, R Hirosky, J Hobbs, B Hoeneisen, J Hoftun, F Hsieh, Tong Hu, A Ito, J Jaques, S Jerger, R Jesik, T Joffe-Minor, K Johns, M Johnson, A Jonckheere, M Jones, H Jöstlein, S Jun, C Jung, S Kahn, G Kalbfleisch, D Karmanov, D Karmgard, R Kehoe, S Kim, B Klima, C Klopfenstein, W Ko, J Kohli, D Koltick, A Kostritskiy, J Kotcher, A Kotwal, A Kozelov, E Kozlovsky, J Krane, M Krishnaswamy, S Krzywdzinski, S Kuleshov, Y Kulik, S Kunori, F Landry, G Landsberg, B Lauer, A Leflat, J Li, Q Li, J Lima, D Lincoln, S Linn, J Linnemann, R Lipton, F Lobkowicz, A Lucotte, L Lueking, A Lyon, A Maciel, R Madaras, R Madden, L Magaña-Mendoza, V Manankov, S Mani, H Mao, R Markeloff, T Marshall, M Martin, K Mauritz, B May, A Mayorov, R McCarthy, J McDonald, T McKibben, J McKinley, T McMahon, H Melanson, M Merkin, K Merritt, C Miao, H Miettinen, A Mincer, C Mishra, N Mokhov, N Mondal, H Montgomery, P Mooney, M Mostafa, H da Motta, C Murphy, F Nang, M Narain, V Narasimham, A Narayanan, H Neal, J Negret, P Nemethy, D Norman, L Oesch, V Oguri, N Oshima, D Owen, P Padley, A Para, N Parashar, Y Park, R Partridge, N Parua, M Paterno, B Pawlik, J Perkins, M Peters, R Piegaia, H Piekarz, Y Pischalnikov, B Pope, H Prosper, S Protopopescu, J Qian, P Quintas, R Raja, S Rajagopalan, O Ramirez, S Reucroft, M Rijssenbeek, T Rockwell, M Roco, P Rubinov, R Ruchti, J Rutherfoord, A Sánchez-Hernández, A Santoro, L Sawyer, R Schamberger, H Schellman, J Sculli, E Shabalina, C Shaffer, H Shankar, R Shivpuri, D Shpakov, M Shupe, H Singh, J Singh, V Sirotenko, E Smith, R Smith, R Snihur, G Snow, J Snow, S Snyder, J Solomon, M Sosebee, N Sotnikova, M Souza, G Steinbrück, R Stephens, M Stevenson, F Stichelbaut, D Stoker, V Stolin, D Stoyanova, M Strauss, K Streets, M Strovink, A Sznajder, P Tamburello, J Tarazi, M Tartaglia, T Thomas, J Thompson, T Trippe, P Tuts, V Vaniev, N Varelas, E Varnes, A Volkov, A Vorobiev, H Wahl, G Wang, J Warchol, G Watts, M Wayne, H Weerts, A White, J White, J Wightman, S Willis, S Wimpenny, J Wirjawan, J Womersley, E Won, D Wood, Z Wu, R Yamada, P Yamin, T Yasuda, P Yepes, K Yip, C Yoshikawa, S Youssef, J Yu, Y Yu, B Zhang, Z Zhou, Z Zhu, M Zielinski, D Zieminska, A Zieminski, E Zverev, A Zylberstejn

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Dijet mass spectrum and a search for quark compositeness in (p)p collisions at sqrt(s) = 1.8 TeV

Physical Review Letters 82:12 (1999) 2457-2462

Authors:

B Abbott, M Abolins, V Abramov, BS Acharya, I Adam, DL Adams, M Adams, S Ahn, H Aihara, GA Alves, N Amos, EW Anderson, R Astur, MM Baarmand, VV Babintsev, L Babukhadia, A Baden, V Balamurali, B Baldin, S Banerjee, J Bantly, E Barberis, P Baringer, JF Bartlett, 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 Breedon, 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, A Dyshkant, 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

Abstract:

Using the DZero detector at the 1.8 TeV pbarp Fermilab Tevatron collider, we have measured the inclusive dijet mass spectrum in the central pseudorapidity region |eta_jet| < 1.0 for dijet masses greater than 200 Gev/c^2. We have also measured the ratio of spectra sigma(|eta_jet| < 0.5)/sigma(0.5 < |eta_jet| < 1.0). The order alpha_s^3 QCD predictions are in good agreement with the data and we rule out models of quark compositeness with a contact interaction scale < 2.4 TeV at the 95% confidence level. © 1999 The American Physical Society.

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Evidence of color coherence effects in W + jets events from pp collisions at √s = 1.8 TeV

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 464:1-2 (1999) 145-155

Authors:

B Abbott, M Abolins, V Abramov, BS Acharya, I Adam, DL Adams, M Adams, S Ahn, 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, A Belyaev, SB Beri, I Bertram, VA Bezzubov, PC Bhat, V Bhatnagar, M Bhattacharjee, G Blazey, S Blessing, P Bloom, A Boehnlein, NI Bojko, F Borcherding, C Boswell, A Brandt, R Breedon, G Briskin, R Brock, A Bross, D Buchholz, 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, WE Cooper, D Coppage, 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, 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, MK Fatyga, S Feher, D Fein, T Ferbel

Abstract:

We report the results of a study of color coherence effects in pp collisions based on data collected by the DØ detector during the 1994-1995 run of the Fermilab Tevatron Collider, at a center of mass energy √s = 1.8 TeV. Initial-to-final state color interference effects are observed by examining particle distribution patterns in events with a W boson and at least one jet. The data are compared to Monte Carlo simulations with different color coherence implementations and to an analytic modified-leading-logarithm perturbative calculation based on the local parton-hadron duality hypothesis. © 1999 Published by Elsevier Science B.V. All rights reserved.

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Dr Elizabeth Gallas

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Measurement of the top quark pair production cross section in pp̄ collisions using multijet final states

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Determination of the absolute jet energy scale in the DO calorimeters

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Abstract:

Search for Nonstandard Higgs Bosons Using High Mass Photon Pairs in pp¯→γγ+2 Jets at √s=1.8 TeV

Authors:

Dijet mass spectrum and a search for quark compositeness in (p)p collisions at sqrt(s) = 1.8 TeV

Authors:

Abstract:

Evidence of color coherence effects in W + jets events from pp collisions at √s = 1.8 TeV

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Dr Elizabeth Gallas

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Measurement of the top quark pair production cross section in pp̄ collisions using multijet final states

Authors:

Abstract:

Determination of the absolute jet energy scale in the DO calorimeters

Authors:

Abstract:

Search for Nonstandard Higgs Bosons Using High Mass Photon Pairs in pp¯→γγ+2 Jets at √s=1.8 TeV

Authors:

Dijet mass spectrum and a search for quark compositeness in (p)p collisions at sqrt(s) = 1.8 TeV

Authors:

Abstract:

Evidence of color coherence effects in W + jets events from pp collisions at √s = 1.8 TeV

Authors:

Abstract: