Search for First Generation Scalar Leptoquark Pairs in {ital p}{bar {ital p}} Collisions at {radical}({ital s}) = 1.8 TeV

Journal Article · Sun Mar 01 04:00:00 EST 1998 · Physical Review Letters

OSTI ID:627540

Gomez, B; Hoeneisen, B; Mooney, P; Negret, J P ^[1]; Davis, K; Fein, D; Forden, G E; Guida, J A; James, E; Johns, K; Nang, F; Narayanan, A; Rutherfoord, J ^[2]; Butler, J M ^[3]; Gibbard, B; Gordon, H; Graf, N; Kahn, S; Kotcher, J; Protopopescu, S ; Rajagopalan, S ^[4]; Bantly, J; Cullen-Vidal, D; Cutts, D; Guida, J M; Hoftun, J S; Partridge, R ^[5]; Grinstein, S; Piegaia, R ^[6]; Bloom, P; Fisyak, Y; Glenn, S; Grim, G; Klopfenstein, C; Lander, R; Mani, S ^[7]; Fahland, T; Hall, R E ^[8]; Boswell, C; Choudhary, B C; Cochran, J; Ellison, J; Gartung, P; Gounder, K; Heinson, A P; Huehn, T ^[9]; Alves, G A; Carvalho, W; Maciel, A K; da Motta, H; Santoro, A ^[10]; Castilla-Valdez, H; Gonzalez Solis, J L; Hernandez-Montoya, R; Magana-Mendoza, L; Sanchez-Hernandez, A ^[11]; Adam, I; Kotwal, A V ^[12]; Ahn, S; Baldin, B; Bartlett, J F; Bhat, P C; Boehnlein, A; Borcherding, F; Brandt, A; Bross, A; Christenson, J H; Cooper, W E; Demarteau, M; Denisov, D; Diehl, H T; Diesburg, M; Feher, S; Fisk, H E; Flattum, E; Fuess, S; Genser, K; Gerber, C E; Green, D R; Greenlee, H; Grossman, N; Gruenendahl, S; Haggerty, H; Hansen, S; Heintz, U; Hobbs, J D; Ito, A S; Johnson, M; Jonckheere, A; others, and

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1. Universidad de los Andes, Bogota (Colombia)
2. University of Arizona, Tucson, Arizona 85721 (United States)
3. Boston University, Boston, Massachusetts 02215 (United States)
4. Brookhaven National Laboratory, Upton, New York 11973 (United States)
5. Brown University, Providence, Rhode Island 02912 (United States)
6. Universidad de Buenos Aires, Buenos Aires (Argentina)
7. University of California, Davis, California 95616 (United States)
8. University of California, Irvine, California 92697 (United States)
9. University of California, Riverside, California 92521 (United States)
10. LAFEX, Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro (Brazil)
11. CINVESTAV, Mexico City (Mexico)
12. Columbia University, New York, New York 10027; Delhi University, Delhi, (India) 110007

We have searched for first generation scalar leptoquark (LQ) pairs in the e{nu}+jets channel using p{bar p} collider data ({integral}Ldt{approx}115 pb{sup {minus}1}) collected by the D0 experiment at the Fermilab Tevatron during 1992{endash}1996. The analysis yields no candidate events. We combine the results with those from the ee+jets and {nu}{nu}+jets channels to obtain 95{percent} confidence level (C.L.) upper limits on the LQ pair production cross section as a function of mass and of {beta} , the branching fraction to a charged lepton. Comparing with the next-to-leading order theory, we set 95{percent} C.L.lower limits on the LQ mass of 225, 204, and 79 GeV/c{sup 2} for {beta}=1 , (1 )/(2) , and 0, respectively. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 627540
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 10 Vol. 80; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BRANCHING RATIO
CHIRAL SYMMETRY
CROSS SECTIONS
FERMILAB TEVATRON
JETS
LEPTONS
MASS
PAIR PRODUCTION
PROTON-ANTIPROTON INTERACTIONS
QUARKS
RENORMALIZATION
SPARTICLES
STANDARD MODEL