Accelerator Neutrinos

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Study of tt production in pp collisions using total transverse energy

Physical Review Letters 75:22 (1995) 3997-4002

Authors:

F Abe, H Akimoto, A Akopian, MG Albrow, SR Amendolia, D Amidei, J Antos, C Anway-Wiese, S Aota, G Apollinari, T Asakawa, W Ashmanskas, M Atac, P Auchincloss, F Azfar, P Azzi-Bacchetta, N Bacchetta, W Badgett, S Bagdasarov, MW Bailey, J Bao, P De Barbaro, A Barbaro-Galtieri, VE Barnes, BA Barnett, P Bartalini, G Bauer, T Baumann, F Bedeschi, S Behrends, S Belforte, G Bellettini, J Bellinger, D Benjamin, J Benlloch, J Bensinger, D Benton, A Beretvas, JP Berge, S Bertolucci, A Bhatti, K Biery, M Binkley, D Bisello, RE Blair, C Blocker, A Bodek, W Bokhari, V Bolognesi, D Bortoletto, J Boudreau, L Breccia, C Bromberg, E Buckley-Geer, HS Budd, K Burkett, G Busetto, A Byon-Wagner, KL Byrum, J Cammerata, C Campagnari, M Campbell, A Caner, W Carithers, D Carlsmith, A Castro, D Cauz, Y Cen, F Cervelli, HY Chao, J Chapman, MT Cheng, G Chiarelli, T Chikamatsu, CN Chiou, L Christofek, S Cihangir, AG Clark, M Cobal, M Contreras, J Conway, J Cooper, M Cordelli, C Couyoumtzelis, D Crane, D Cronin-Hennessy, R Culbertson, JD Cunningham, T Daniels, F Dejongh, S Delchamps, S Dell'Agnello, M Dell'Orso, L Demortier, B Denby, M Deninno, PF Derwent, T Devlin, M Dickson, JR Dittmann

Abstract:

We analyze a sample of W+jet events collected with the Collider Detector at Fermilab (CDF) in pp» collisions at s=1.8 TeV to study tt» production. We employ a simple kinematical variable H, defined as the scalar sum of the transverse energies of the lepton, neutrino, and jets. For events with a W boson and four or more jets, the shape of the H distribution deviates by 3.8 standard deviations from that expected from known backgrounds to tt» production. However, this distribution agrees well with a linear combination of background and tt» events, the agreement being best for a top mass of 180 GeV/c2. © 1995 The American Physical Society.
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Ultrahigh energy cosmic ray composition from surface air shower and underground muon measurements at Soudan 2

Physical Review D 52:5 (1995) 2760-2765

Authors:

NP Longley, CR Bode, PM Border, H Courant, DM Demuth, RN Gray, K Johns, SMS Kasahara, MJ Lowe, ML Marshak, WH Miller, L Mualem, EA Peterson, DM Roback, K Ruddick, DJ Schmid, MH Schub, MA Shupe, V Vassiliev, G Villaume, SJ Werkema, DS Ayres, TH Fields, HM Gallagher, MC Goodman, FV Lopez, EN May, LE Price, RV Seidlein, JL Thron, HJ Trost, JL Uretsky, WWM Allison, GD Barr, CB Brooks, JH Cobb, GL Giller, A Stassinakis, MA Thomson, N West, U Wielgosz, GJ Alner, DJA Cockerill, RJ Cotton, C Garcia-Garcia, PJ Litchfield, GF Pearce, B Ewen, T Kafka, J Kochocki, W Leeson, WA Mann, RH Milburn, A Napier, W Oliver, B Saitta, J Schneps, N Sundaralingam, WL Barrett

Abstract:

The Soudan 2 experiment has performed time-coincident cosmic ray air shower and underground muon measurements. Comparisons to Monte Carlo predictions show that such measurements can make statistically significant tests of the primary composition in the knee region of the cosmic ray spectrum. The results do not support any significant increase in the average primary mass with energy in the range of 104 TeV per nucleus. Some systematic uncertainties remain, however, particularly in the Monte Carlo modeling of the cosmic ray shower. © 1995 The American Physical Society.
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W and Z boson production in pp̄ collisions at s=1.8 TeV

Physical Review Letters 75:8 (1995) 1456-1461

Authors:

S Abachi, B Abbott, M Abolins, BS Acharya, I Adam, DL Adams, M Adams, S Ahn, H Aihara, J Alitti, G Alvarez, GA Alves, E Amidi, N Amos, EW Anderson, SH Aronson, R Astur, RE Avery, A Baden, V Balamurali, J Balderston, B Baldin, J Bantly, JF Bartlett, K Bazizi, J Bendich, SB Beri, I Bertram, VA Bezzubov, PC Bhat, V Bhatnagar, M Bhattacharjee, A Bischoff, N Biswas, G Blazey, S Blessing, P Bloom, A Boehnlein, NI Bojko, F Borcherding, J Borders, C Boswell, A Brandt, R Brock, A Bross, D Buchholz, VS Burtovoi, JM Butler, D Casey, H Castilla-Valdez, D Chakraborty, SM Chang, SV Chekulaev, LP Chen, W Chen, L Chevalier, 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 De, M Demarteau, R Demina, K Denisenko, N Denisenko, D Denisov, SP Denisov, W Dharmaratna, HT Diehl, M Diesburg, G Di Loreto, R Dixon, P Draper, J Drinkard, Y Ducros, SR Dugad, S Durston-Johnson, D Edmunds, J Ellison, VD Elvira, R Engelmann, S Eno, G Eppley, P Ermolov, OV Eroshin, VN Evdokimov, S Fahey, T Fahland, M Fatyga, MK Fatyga

Abstract:

The inclusive cross sections times leptonic branching ratios for W and Z boson production in pp̄ collisions at s=1.8 TeV were measured using the D0 detector at the Fermilab Tevatron collider: σWB(W→eν)=2. 36±0.07±0.13 nb, σWBW→μν=2.09±0. 23±0.11 nb, σZBZ→e+e-=0.218±0.011±0.012 nb, and σZBZ→μ+μ-=0.178±0.030±0.009 nb. The first error is the combined statistical and systematic uncertainty, and the second reflects the uncertainty in the luminosity. For the combined electron and muon analyses we find σWB(W→lν)/σZB(Z→l+l-)=10.90±0.49. Assuming standard model couplings, this result is used to determine the width of the W boson, γ(W)=2.044±0.093 GeV. © 1995 The American Physical Society.
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Results from sage II

Nuclear and Particle Physics Proceedings Elsevier 38:1-3 (1995) 60-67

Authors:

JN Abdurashitov, EL Faizov, VN Gavrin, AO Gusev, AV Kalikhov, TV Knodel, II Knyshenko, VN Kornoukhov, IN Mirmov, AM Pshukov, AM Shalagin, AA Shikhin, PV Timofeyev, EP Veretenkin, VM Vermul, GT Zatsepin, TJ Bowles, JS Nico, WA Teasdale, DL Wark, JF Wilkerson, BT Cleveland, R Davis, T Daily, K Lande, CK Lee, PW Wildenhain, SR Elliott, ML Cherry
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2ND GENERATION LEPTOQUARK SEARCH IN P(P)OVER-BAR COLLISIONS AT ROOT-S=1.8-TEV

PHYSICAL REVIEW LETTERS 75:20 (1995) 3618-3623

Authors:

S ABACHI, B ABBOTT, M ABOLINS, BS ACHARYA, I ADAM, DL ADAMS, M ADAMS, S AHN, H AIHARA, J ALITTI, G ALVAREZ, GA ALVES, E AMIDI, N AMOS, EW ANDERSON, SH ARONSON, R ASTUR, RE AVERY, A BADEN, V BALAMURALI, J BALDERSTON, B BALDIN, J BANTLY, JF BARTLETT, K BAZIZI, J BENDICH, SB BERI, I BERTRAM, VA BEZZUBOV, PC BHAT, V BHATNAGAR, M BHATTACHARJEE, A BISCHOFF, N BISWAS, G BLAZEY, S BLESSING, P BLOOM, A BOEHNLEIN, NI BOJKO, F BORCHERDING, J BORDERS, C BOSWELL, A BRANDT, R BROCK, A BROSS, D BUCHHOLZ, VS BURTOVOI, JM BUTLER, D CASEY, H CASTILLAVALDEZ, D CHAKRABORTY, SM CHANG, SV CHEKULAEV, LP CHEN, W CHEN, L CHEVALIER, S CHOPRA, BC CHOUDHARY, JH CHRISTENSON, M CHUNG, D CLAES, AR CLARK, WG COBAU, J COCHRAN, WE COOPER, C CRETSINGER, D CULLENVIDAL, MAC CUMMINGS, D CUTTS, OI DAHL, K DE, M DEMARTEAU, R DEMINA, K DENISENKO, N DENISENKO, D DENISOV, SP DENISOV, W DHARMARATNA, HT DIEHL, M DIESBURG, G DILORETO, R DIXON, P DRAPER, J DRINKARD, Y DUCROS, SR DUGAD, S DURSTONJOHNSON, D EDMUNDS, J ELLISON, VD ELVIRA, R ENGELMANN, S ENO, G EPPLEY, P ERMOLOV, OV EROSHIN, VN EVDOKIMOV, S FAHEY, T FAHLAND, M FATYGA, MK FATYGA, J FEATHERLY, S FEHER, D FEIN, T FERBEL, G FINOCCHIARO, HE FISK, Y FISYAK, E FLATTUM, GE FORDEN, M FORTNER, KC FRAME, P FRANZINI, S FUESS, AN GALJAEV, E GALLAS, CS GAO, S GAO, TL GELD, RJ GENIK, K GENSER, CE GERBER, B GIBBARD, V GLEBOV, S GLENN, B GOBBI, M GOFORTH, A GOLDSCHMIDT, B GOMEZ, PI GONCHAROV, H GORDON, LT GOSS, N GRAF, PD GRANNIS, DR GREEN, J GREEN, H GREENLEE, G GRIFFIN, N GROSSMAN, P GRUDBERG, S GRUNENDAHL, W GU, G GUGLIELMO, JA GUIDA, JM GUIDA, W GURYN, SN GURZHIEV, P GUTIERREZ, YE GUTNIKOV, NJ HADLEY, H HAGGERTY, S HAGOPIAN, V HAGOPIAN, KS HAHN, RE HALL, S HANSEN, R HATCHER, JM HAUPTMAN, D HEDIN, AP HEINSON, U HEINTZ, R HERNANDEZMONTOYA, T HEURING, R HIROSKY, JD HOBBS, B HOENEISEN, JS HOFTUN, F HSIEH, T HU, T HU, T HUEHN, S IGARASHI, AS ITO, E JAMES, J JAQUES, SA JERGER, JZY JIANG, T JOFFEMINOR, H JOHARI, K JOHNS, M JOHNSON, H JOHNSTAD, A JONCKHEERE, M JONES, H JOSTLEIN, SY JUN, CK JUNG, S KAHN, G KALBFLEISCH, JS KANG, R KEHOE, ML KELLY, A KERNAN, L KERTH, CL KIM, SK KIM, A KLATCHKO, B KLIMA, BI KLOCHKOV, C KLOPFENSTEIN, VI KLYUKHIN, VI KOCHETKOV, JM KOHLI, D KOLTICK, AV KOSTRITSKIY, J KOTCHER, J KOURLAS, AV KOZELOV, EA KOZLOVSKI, MR KRISHNASWAMY, S KRZYWDZINSKI, S KUNORI, S LAMI, G LANDSBERG, RE LANOU, JF LEBRAT, A LEFLAT, H LI, J LI, YK LI, QZ LIDEMARTEAU, JGR LIMA, D LINCOLN, SL LINN, J LINNEMANN, R LIPTON, YC LIU, F LOBKOWICZ, SC LOKEN, S LOKOS, L LUEKING, AL LYON, AKA MACIEL, RJ MADARAS, R MADDEN, IV MANDRICHENKO, P MANGEOT, S MANI, B MANSOULIE, HS MAO, S MARGULIES, R MARKELOFF, L MARKOSKY, T MARSHALL, MI MARTIN, M MARX, B MAY, AA MAYOROV, R MCCARTHY, T MCKIBBEN, J MCKINLEY, T MCMAHON, HL MELANSON, JRT DEMELLONETO, KW MERRITT, H MIETTINEN, A MILDER, A MINCER, JM DEMIRANDA, CS MISHRA, M MOHAMMADIBAARMAND, N MOKHOV, NK MONDAL, HE MONTGOMERY, P MOONEY, M MUDAN, C MURPHY, CT MURPHY, F NANG, M NARAIN, VS NARASIMHAM, A NARAYANAN, HA NEAL, JP NEGRET, E NEIS, P NEMETHY, D NESIC, D NORMAN, L OESCH, V OGURI, E OLTMAN, N OSHIMA, D OWEN, P PADLEY, M PANG, A PARA, CH PARK, YM PARK, R PARTRIDGE, N PARUA, M PATERNO, J PERKINS, A PERYSHKIN, M PETERS, H PIEKARZ, Y PISCHALNIKOV, A PLUQUET, VM PODSTAVKOV, BG POPE, HB PROSPER, S PROTOPOPESCU, D PUSELJIC, J QIAN, PZ QUINTAS, R RAJA, S RAJAGOPALAN, O RAMIREZ, MVS RAO, PA RAPIDIS, L RASMUSSEN, AL READ, S REUCROFT, M RIJSSENBEEK, T ROCKWELL, NA ROE, P RUBINOV, R RUCHTI, S RUSIN, J RUTHERFOORD, A SANTORO, L SAWYER, RD SCHAMBERGER, H SCHELLMAN, J SCULLI, E SHABALINA, C SHAFFER, HC SHANKAR, RK SHIVPURI, M SHUPE, JB SINGH, V SIROTENKO, W SMART, A SMITH, RP SMITH, R SNIHUR, GR SNOW, S SNYDER, J SOLOMON, PM SOOD, M SOSEBEE, M SOUZA, AL SPADAFORA, RW STEPHENS, ML STEVENSON, D STEWART, DA STOIANOVA, D STOKER, K STREETS, M STROVINK, A TAKETANI, P TAMBURELLO, J TARAZI, M TARTAGLIA, TL TAYLOR, J TEIGER, J THOMPSON, TG TRIPPE, PM TUTS, N VARELAS, EW VARNES, PRG VIRADOR, D VITITOE, AA VOLKOV, AP VOROBIEV, HD WAHL, G WANG, J WANG, LZ WANG, J WARCHOL, M WAYNE, H WEERTS, F WEN, WA WENZEL, A WHITE, JT WHITE, JA WIGHTMAN, J WILCOX, S WILLIS, SJ WIMPENNY, JVD WIRJAWAN, J WOMERSLEY, E WON, DR WOOD, H XU, R YAMADA, P YAMIN, C YANAGISAWA, J YANG, T YASUDA, C YOSHIKAWA, S YOUSSEF, J YU, Y YU, Y ZHANG, YH ZHOU, Q ZHU, YS ZHU, ZH ZHU, D ZIEMINSKA, A ZIEMINSKI, A ZYLBERSTEJN
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