SEARCH FOR 1ST-GENERATION LEPTOQUARKS IN (P)OVER-BAR-P COLLISIONS AT ROOT-S=1.8TEV

被引:43
作者
ABE, F
ALBROW, M
AMIDEI, D
ANWAYWIESE, C
APOLLINARI, G
ATAC, M
AUCHINCLOSS, P
AZZI, P
BADEN, AR
BACCHETTA, N
BADGETT, W
BAILEY, MW
BAMBERGER, A
DEBARBARO, P
BARBAROGALTIERI, A
BARNES, VE
BARNETT, BA
BAUER, G
BAUMANN, T
BEDESCHI, F
BEHRENDS, S
BELFORTE, S
BELLETTINI, G
BELLINGER, J
BENJAMIN, D
BENLLOCH, J
BENSINGER, J
BERETVAS, A
BERGE, JP
BERTOLUCCI, S
BIERY, K
BHADRA, S
BINKLEY, M
BISELLO, D
BLAIR, R
BLOCKER, C
BODEK, A
BOLOGNESI, V
BOOTH, AW
BOSWELL, C
BRANDENBURG, G
BROWN, D
BUCKLEYGEER, E
BUDD, HS
BUSETTO, G
BYONWAGNER, A
BYRUM, KL
CAMPAGNARI, C
CAMPBELL, M
CANER, A
机构
[1] ARGONNE NATL LAB,ARGONNE,IL 60439
[2] BRANDEIS UNIV,WALTHAM,MA 02254
[3] UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024
[4] UNIV CHICAGO,CHICAGO,IL 60637
[5] DUKE UNIV,DURHAM,NC 27706
[6] FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510
[7] IST NAZL FIS NUCL,LAB NAZL FRASCATI,FRASCATI,ITALY
[8] HARVARD UNIV,CAMBRIDGE,MA 02138
[9] UNIV ILLINOIS,URBANA,IL 61801
[10] MCGILL UNIV,INST PARTICLE PHYS,MONTREAL H3A 2T5,QUEBEC,CANADA
[11] UNIV TORONTO,TORONTO M5S 1A1,ONTARIO,CANADA
[12] JOHNS HOPKINS UNIV,BALTIMORE,MD 21218
[13] LAWRENCE BERKELEY LAB,BERKELEY,CA 94720
[14] MIT,CAMBRIDGE,MA 02139
[15] UNIV MICHIGAN,ANN ARBOR,MI 48109
[16] UNIV NEW MEXICO,ALBUQUERQUE,NM 87131
[17] UNIV PADUA,INST NAZL FIS NUCL,SEZ PADOVA,I-35131 PADUA,ITALY
[18] UNIV PENN,PHILADELPHIA,PA 19104
[19] UNIV PITTSBURGH,PITTSBURGH,PA 15260
[20] UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY
[21] SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY
[22] PURDUE UNIV,W LAFAYETTE,IN 47907
[23] UNIV ROCHESTER,ROCHESTER,NY 14627
[24] ROCKEFELLER UNIV,NEW YORK,NY 10021
[25] RUTGERS UNIV,PISCATAWAY,NJ 08854
[26] TEXAS A&M UNIV SYST,COLL STN,TX 77843
[27] UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN
[28] TUFTS UNIV,MEDFORD,MA 02155
[29] UNIV WISCONSIN,MADISON,WI 53706
来源
PHYSICAL REVIEW D | 1993年 / 48卷 / 09期
关键词
D O I
10.1103/PhysRevD.48.R3939
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present results of a search for a first-generation leptoquark S1 in ppBAR collisions at square-root s = 1.8 TeV at the Fermilab Tevatron. Using 4.05 pb-1 of data collected during the 1988-1989 CDF run, we have searched for evidence of S1S1BAR production assuming that each leptoquark decays to an electron+quark pair with a branching ratio beta. Three events with two high energy electrons and two high energy jets were found, but are consistent with Z0 decay. No events were found in the signal region. Assuming a short lived scalar leptoquark with Yukawa coupling strength lambda greater than or similar to 2 x 10(-7), we exclude sigmabeta2 > 55(4.0) pb at 95% C.L. for M(s) = 45(125) GeV/c2. Using a Monte Carlo prediction for sigma(ppBAR --> S1S1 + X), we exclude M(s) < 113(80) GeV/c2 for beta = 100(50)%.
引用
收藏
页码:R3939 / R3944
页数:6
相关论文
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