Phys. Rev. Lett. 83, 2896 - 2901 (1999)
Search for Second Generation Leptoquark Pairs Decaying to μν + jets in pp̅ Collisions at √s = 1.8 TeV
B. Abbott et al. (D0 Collaboration)
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B. Abbott45, M. Abolins42, V. Abramov18, B. S. Acharya11, I. Adam44, D. L. Adams54, M. Adams28, S. Ahn27, V. Akimov16, G. A. Alves2, N. Amos41, E. W. Anderson34, M. M. Baarmand47, V. V. Babintsev18, L. Babukhadia20, A. Baden38, B. Baldin27, S. Banerjee11, J. Bantly51, E. Barberis21, P. Baringer35, J. F. Bartlett27, A. Belyaev17, S. B. Beri9, I. Bertram19, V. A. Bezzubov18, P. C. Bhat27, V. Bhatnagar9, M. Bhattacharjee47, N. Biswas32, G. Blazey29, S. Blessing25, P. Bloom22, A. Boehnlein27, N. I. Bojko18, F. Borcherding27, C. Boswell24, A. Brandt27, R. Breedon22, G. Briskin51, R. Brock42, A. Bross27, D. Buchholz30, V. S. Burtovoi18, J. M. Butler39, W. Carvalho2, D. Casey42, Z. Casilum47, H. Castilla-Valdez14, D. Chakraborty47, S. V. Chekulaev18, W. Chen47, S. Choi13, S. Chopra25, B. C. Choudhary24, J. H. Christenson27, M. Chung28, D. Claes43, A. R. Clark21, W. G. Cobau38, J. Cochran24, L. Coney32, W. E. Cooper27, D. Coppage35, C. Cretsinger46, D. Cullen-Vidal51, M. A. C. Cummings29, D. Cutts51, O. I. Dahl21, K. Davis20, K. De52, K. Del Signore41, M. Demarteau27, D. Denisov27, S. P. Denisov18, H. T. Diehl27, M. Diesburg27, G. Di Loreto42, P. Draper52, Y. Ducros8, L. V. Dudko17, S. R. Dugad11, A. Dyshkant18, D. Edmunds42, J. Ellison24, V. D. Elvira47, R. Engelmann47, S. Eno38, G. Eppley54, P. Ermolov17, O. V. Eroshin18, H. Evans44, V. N. Evdokimov18, T. Fahland23, M. K. Fatyga46, S. Feher27, D. Fein20, T. Ferbel46, H. E. Fisk27, Y. Fisyak48, E. Flattum27, G. E. Forden20, M. Fortner29, K. C. Frame42, S. Fuess27, E. Gallas27, A. N. Galyaev18, P. Gartung24, V. Gavrilov16, T. L. Geld42, R. J. Genik, II42, K. Genser27, C. E. Gerber27, Y. Gershtein51, B. Gibbard48, B. Gobbi30, B. Gómez5, G. Gómez38, P. I. Goncharov18, J. L. González Solís14, H. Gordon48, L. T. Goss53, K. Gounder24, A. Goussiou47, N. Graf48, P. D. Grannis47, D. R. Green27, J. A. Green34, H. Greenlee27, S. Grinstein1, P. Grudberg21, S. Grünendahl27, G. Guglielmo50, J. A. Guida20, J. M. Guida51, A. Gupta11, S. N. Gurzhiev18, G. Gutierrez27, P. Gutierrez50, N. J. Hadley38, H. Haggerty27, S. Hagopian25, V. Hagopian25, K. S. Hahn46, R. E. Hall23, P. Hanlet40, S. Hansen27, J. M. Hauptman34, C. Hays44, C. Hebert35, D. Hedin29, A. P. Heinson24, U. Heintz39, R. Hernández-Montoya14, T. Heuring25, R. Hirosky28, J. D. Hobbs47, B. Hoeneisen6, J. S. Hoftun51, F. Hsieh41, Tong Hu31, A. S. Ito27, S. A. Jerger42, R. Jesik31, T. Joffe-Minor30, K. Johns20, M. Johnson27, A. Jonckheere27, M. Jones26, H. Jöstlein27, S. Y. Jun30, C. K. Jung47, S. Kahn48, D. Karmanov17, D. Karmgard25, R. Kehoe32, S. K. Kim13, B. Klima27, C. Klopfenstein22, B. Knuteson17, W. Ko22, J. M. Kohli9, D. Koltick33, A. V. Kostritskiy18, J. Kotcher48, A. V. Kotwal44, A. V. Kozelov18, E. A. Kozlovsky18, J. Krane34, M. R. Krishnaswamy11, S. Krzywdzinski27, M. Kubantsev36, S. Kuleshov16, Y. Kulik47, S. Kunori38, F. Landry42, G. Landsberg51, A. Leflat17, J. Li52, Q. Z. Li27, J. G. R. Lima3, D. Lincoln27, S. L. Linn25, J. Linnemann42, R. Lipton27, A. Lucotte47, L. Lueking27, A. L. Lyon38, A. K. A. Maciel29, R. J. Madaras21, R. Madden25, L. Magaña-Mendoza14, V. Manankov17, S. Mani22, H. S. Mao4, R. Markeloff29, T. Marshall31, M. I. Martin27, R. D. Martin28, K. M. Mauritz34, B. May30, A. A. Mayorov18, R. McCarthy47, J. McDonald25, T. McKibben28, J. McKinley42, T. McMahon49, H. L. Melanson27, M. Merkin17, K. W. Merritt27, C. Miao51, H. Miettinen54, A. Mincer45, C. S. Mishra27, N. Mokhov27, N. K. Mondal11, H. E. Montgomery27, P. Mooney5, M. Mostafa1, H. da Motta2, C. Murphy28, F. Nang20, M. Narain39, V. S. Narasimham11, A. Narayanan20, H. A. Neal41, J. P. Negret5, P. Nemethy45, D. Norman53, L. Oesch41, V. Oguri3, N. Oshima27, D. Owen42, P. Padley54, A. Para27, N. Parashar40, Y. M. Park12, R. Partridge51, N. Parua7, M. Paterno46, B. Pawlik15, J. Perkins52, M. Peters26, R. Piegaia1, H. Piekarz25, Y. Pischalnikov33, B. G. Pope42, H. B. Prosper25, S. Protopopescu48, J. Qian41, P. Z. Quintas27, R. Raja27, S. Rajagopalan48, O. Ramirez28, N. W. Reay36, S. Reucroft40, M. Rijssenbeek47, T. Rockwell42, M. Roco27, P. Rubinov30, R. Ruchti32, J. Rutherfoord20, A. Sánchez-Hernández14, A. Santoro2, L. Sawyer37, R. D. Schamberger47, H. Schellman30, J. Sculli45, E. Shabalina17, C. Shaffer25, H. C. Shankar11, R. K. Shivpuri10, D. Shpakov47, M. Shupe20, R. A. Sidwell36, H. Singh24, J. B. Singh9, V. Sirotenko29, E. Smith50, R. P. Smith27, R. Snihur30, G. R. Snow43, J. Snow49, S. Snyder48, J. Solomon28, M. Sosebee52, N. Sotnikova17, M. Souza2, N. R. Stanton36, G. Steinbrück50, R. W. Stephens52, M. L. Stevenson21, F. Stichelbaut48, D. Stoker23, V. Stolin16, D. A. Stoyanova18, M. Strauss50, K. Streets45, M. Strovink21, A. Sznajder2, P. Tamburello38, J. Tarazi23, M. Tartaglia27, T. L. T. Thomas30, J. Thompson38, D. Toback38, T. G. Trippe21, P. M. Tuts44, V. Vaniev18, N. Varelas28, E. W. Varnes21, A. A. Volkov18, A. P. Vorobiev18, H. D. Wahl25, G. Wang25, J. Warchol32, G. Watts51, M. Wayne32, H. Weerts42, A. White52, J. T. White53, J. A. Wightman34, S. Willis29, S. J. Wimpenny24, J. V. D. Wirjawan53, J. Womersley27, D. R. Wood40, R. Yamada27, P. Yamin48, T. Yasuda40, P. Yepes54, K. Yip27, C. Yoshikawa26, S. Youssef25, J. Yu27, Y. Yu13, B. Zhang4, Z. Zhou34, Z. H. Zhu46, M. Zielinski46, D. Zieminska31, A. Zieminski31, V. Zutshi46, E. G. Zverev17, and A. Zylberstejn8 (D0 Collaboration)
1Universidad de Buenos Aires, Buenos Aires, Argentina
2LAFEX, Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil
3Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
4Institute of High Energy Physics, Beijing, People's Republic of China
5Universidad de los Andes, Bogotá, Colombia
6Universidad San Francisco de Quito, Quito, Ecuador
7Institut des Sciences Nucléaires, IN2P3-CNRS, Universite de Grenoble 1, Grenoble, France
8DAPNIA/Service de Physique des Particules, CEA, Saclay, France
9Panjab University, Chandigarh, India
10Delhi University, Delhi, India
11Tata Institute of Fundamental Research, Mumbai, India
12Kyungsung University, Pusan, Korea
13Seoul National University, Seoul, Korea
14CINVESTAV, Mexico City, Mexico
15Institute of Nuclear Physics, Kraków, Poland
16Institute for Theoretical and Experimental Physics, Moscow, Russia
17Moscow State University, Moscow, Russia
18Institute for High Energy Physics, Protvino, Russia
19Lancaster University, Lancaster, United Kingdom
20University of Arizona, Tucson, Arizona 85721
21Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720
22University of California, Davis, California 95616
23University of California, Irvine, California 92697
24University of California, Riverside, California 92521
25Florida State University, Tallahassee, Florida 32306
26University of Hawaii, Honolulu, Hawaii 96822
27Fermi National Accelerator Laboratory, Batavia, Illinois 60510
28University of Illinois at Chicago, Chicago, Illinois 60607
29Northern Illinois University, DeKalb, Illinois 60115
30Northwestern University, Evanston, Illinois 60208
31Indiana University, Bloomington, Indiana 47405
32University of Notre Dame, Notre Dame, Indiana 46556
33Purdue University, West Lafayette, Indiana 47907
34Iowa State University, Ames, Iowa 50011
35University of Kansas, Lawrence, Kansas 66045
36Kansas State University, Manhattan, Kansas 66506
37Louisiana Tech University, Ruston, Louisiana 71272
38University of Maryland, College Park, Maryland 20742
39Boston University, Boston, Massachusetts 02215
40Northeastern University, Boston, Massachusetts 02115
41University of Michigan, Ann Arbor, Michigan 48109
42Michigan State University, East Lansing, Michigan 48824
43University of Nebraska, Lincoln, Nebraska 68588
44Columbia University, New York, New York 10027
45New York University, New York, New York 10003
46University of Rochester, Rochester, New York 14627
47State University of New York, Stony Brook, New York 11794
48Brookhaven National Laboratory, Upton, New York 11973
49Langston University, Langston, Oklahoma 73050
50University of Oklahoma, Norman, Oklahoma 73019
51Brown University, Providence, Rhode Island 02912
52University of Texas, Arlington, Texas 76019
53Texas A&M University, College Station, Texas 77843
54Rice University, Houston, Texas 77005
Received 23 April 1999
We report on a search for second generation leptoquarks (LQ) produced in pp̅ collisions at sqrt[s] = 1.8 TeV using the D0 detector at Fermilab. Second generation leptoquarks are assumed to be produced in pairs and to decay to either μ or ν and either a strange or a charm quark (q). Limits are placed on σ(pp̅ →LQLQ̅ →μν+jets) as a function of the mass of the leptoquark. For equal branching ratios to μq and νq, second generation scalar leptoquarks with a mass below 160 GeV/c2, vector leptoquarks with anomalous minimal vector couplings with a mass below 240 GeV/c2, and vector leptoquarks with Yang-Mills couplings with a mass below 290 GeV/c2, are excluded at the 95% confidence level.
©1999 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.83.2896
DOI: 10.1103/PhysRevLett.83.2896
PACS: 13.85.Rm, 13.85.Qk, 14.80.-j
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