Phys. Rev. Lett.
76,
734–739
(1996)
Jet Production via Strongly Interacting Color-Singlet Exchange in pp̅ Collisions
S. Abachi et al. (D0 Collaboration)
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S. Abachi12, B. Abbott34, M. Abolins23, B. S. Acharya42, I. Adam10, D. L. Adams35, M. Adams15, S. Ahn12, H. Aihara20, J. Alitti38, G. Álvarez16, G. A. Alves8, E. Amidi27, N. Amos22, E. W. Anderson17, S. H. Aronson3, R. Astur40, R. E. Avery29, A. Baden21, V. Balamurali30, J. Balderston14, B. Baldin12, J. Bantly4, J. F. Bartlett12, K. Bazizi37, J. Bendich20, S. B. Beri32, I. Bertram35, V. A. Bezzubov33, P. C. Bhat12, V. Bhatnagar32, M. Bhattacharjee11, A. Bischoff7, N. Biswas30, G. Blazey12, S. Blessing13, P. Bloom5, A. Boehnlein12, N. I. Bojko33, F. Borcherding12, J. Borders37, C. Boswell7, A. Brandt12, R. Brock23, A. Bross12, D. Buchholz29, V. S. Burtovoi33, J. M. Butler12, W. Carvalho8, D. Casey37, H. Castilla-Valdez9, D. Chakraborty40, S.-M. Chang27, S. V. Chekulaev33, L.-P. Chen20, W. Chen40, L. Chevalier38, S. Chopra32, B. C. Choudhary7, J. H. Christenson12, M. Chung15, D. Claes40, A. R. Clark20, W. G. Cobau21, J. Cochran7, W. E. Cooper12, C. Cretsinger37, D. Cullen-Vidal4, M. A. C. Cummings14, D. Cutts4, O. I. Dahl20, K. De43, M. Demarteau12, R. Demina27, K. Denisenko12, N. Denisenko12, D. Denisov12, S. P. Denisov33, H. T. Diehl12, M. Diesburg12, G. Di Loreto23, R. Dixon12, P. Draper43, J. Drinkard6, Y. Ducros38, S. R. Dugad42, S. Durston-Johnson37, D. Edmunds23, J. Ellison7, V. D. Elvira12, R. Engelmann40, S. Eno21, G. Eppley35, P. Ermolov24, O. V. Eroshin33, V. N. Evdokimov33, S. Fahey23, T. Fahland4, M. Fatyga3, M. K. Fatyga37, J. Featherly3, S. Feher40, D. Fein2, T. Ferbel37, G. Finocchiaro40, H. E. Fisk12, Y. Fisyak5, E. Flattum23, G. E. Forden2, M. Fortner28, K. C. Frame23, P. Franzini10, S. Fuess12, E. Gallas43, A. N. Galyaev33, T. L. Geld23, R. J. Genik II23, K. Genser12, C. E. Gerber12, B. Gibbard3, V. Glebov37, S. Glenn5, B. Gobbi29, M. Goforth13, A. Goldschmidt20, B. Gómez1, P. I. Goncharov33, J. L. González Solís9, H. Gordon3, L. T. Goss44, N. Graf3, P. D. Grannis40, D. R. Green12, J. Green28, H. Greenlee12, G. Griffin6, N. Grossman12, P. Grudberg20, S. Grünendahl37, W. X. Gu12, G. Guglielmo31, J. A. Guida2, J. M. Guida3, W. Guryn3, S. N. Gurzhiev33, P. Gutierrez31, Y. E. Gutnikov33, N. J. Hadley21, H. Haggerty12, S. Hagopian13, V. Hagopian13, K. S. Hahn37, R. E. Hall6, S. Hansen12, R. Hatcher23, J. M. Hauptman17, D. Hedin28, A. P. Heinson7, U. Heintz12, R. Hernández-Montoya9, T. Heuring13, R. Hirosky13, J. D. Hobbs12, B. Hoeneisen1, J. S. Hoftun4, F. Hsieh22, Tao Hu12, Ting Hu40, Tong Hu16, T. Huehn7, S. Igarashi12, A. S. Ito12, E. James2, J. Jaques30, S. A. Jerger23, J. Z.-Y. Jiang40, T. Joffe-Minor29, H. Johari27, K. Johns2, M. Johnson12, H. Johnstad41, A. Jonckheere12, M. Jones14, H. Jöstlein12, S. Y. Jun29, C. K. Jung40, S. Kahn3, G. Kalbfleisch31, J. S. Kang18, R. Kehoe30, M. L. Kelly30, A. Kernan7, L. Kerth20, C. L. Kim18, S. K. Kim39, A. Klatchko13, B. Klima12, B. I. Klochkov33, C. Klopfenstein5, V. I. Klyukhin33, V. I. Kochetkov33, J. M. Kohli32, D. Koltick34, A. V. Kostritskiy33, J. Kotcher3, J. Kourlas26, A. V. Kozelov33, E. A. Kozlovski33, M. R. Krishnaswamy42, S. Krzywdzinski12, S. Kunori21, S. Lami40, G. Landsberg12, J-F. Lebrat38, A. Leflat24, H. Li40, J. Li43, Y. K. Li29, Q. Z. Li-Demarteau12, J. G. R. Lima36, D. Lincoln22, S. L. Linn13, J. Linnemann23, R. Lipton12, Y. C. Liu29, F. Lobkowicz37, S. C. Loken20, S. Lökös40, L. Lueking12, A. L. Lyon21, A. K. A. Maciel8, R. J. Madaras20, R. Madden13, I. V. Mandrichenko33, Ph. Mangeot38, S. Mani5, B. Mansoulié38, H. S. Mao12, S. Margulies15, R. Markeloff28, L. Markosky2, T. Marshall16, M. I. Martin12, M. Marx40, B. May29, A. A. Mayorov33, R. McCarthy40, T. McKibben15, J. McKinley23, T. McMahon31, H. L. Melanson12, J. R. T. de Mello Neto36, K. W. Merritt12, H. Miettinen35, A. Milder2, A. Mincer26, J. M. de Miranda8, C. S. Mishra12, M. Mohammadi-Baarmand40, N. Mokhov12, N. K. Mondal42, H. E. Montgomery12, P. Mooney1, M. Mudan26, C. Murphy16, C. T. Murphy12, F. Nang4, M. Narain12, V. S. Narasimham42, A. Narayanan2, H. A. Neal22, J. P. Negret1, E. Neis22, P. Nemethy26, D. Nešić4, M. Nicola8, D. Norman44, L. Oesch22, V. Oguri36, E. Oltman20, N. Oshima12, D. Owen23, P. Padley35, M. Pang17, A. Para12, C. H. Park12, Y. M. Park19, R. Partridge4, N. Parua42, M. Paterno37, J. Perkins42, A. Peryshkin12, M. Peters14, H. Piekarz13, Y. Pischalnikov34, A. Pluquet38, V. M. Podstavkov33, B. G. Pope23, H. B. Prosper13, S. Protopopescu3, D. Pušeljić20, J. Qian22, P. Z. Quintas12, R. Raja12, S. Rajagopalan40, O. Ramirez15, M. V. S. Rao42, P. A. Rapidis12, L. Rasmussen40, A. L. Read12, S. Reucroft27, M. Rijssenbeek40, T. Rockwell23, N. A. Roe20, P. Rubinov29, R. Ruchti30, S. Rusin24, J. Rutherfoord2, A. Santoro8, L. Sawyer43, R. D. Schamberger40, H. Schellman29, J. Sculli26, E. Shabalina24, C. Shaffer13, H. C. Shankar42, Y. Y. Shao12, R. K. Shivpuri11, M. Shupe2, J. B. Singh32, V. Sirotenko28, W. Smart12, A. Smith2, R. P. Smith12, R. Snihur29, G. R. Snow25, S. Snyder3, J. Solomon15, P. M. Sood32, M. Sosebee42, M. Souza8, A. L. Spadafora20, R. W. Stephens43, M. L. Stevenson20, D. Stewart22, D. A. Stoianova33, D. Stoker6, K. Streets26, M. Strovink20, A. Sznajder8, A. Taketani12, P. Tamburello21, J. Tarazi6, M. Tartaglia12, T. L. Taylor29, J. Teiger38, J. Thompson21, T. G. Trippe20, P. M. Tuts10, N. Varelas23, E. W. Varnes20, P. R. G. Virador20, D. Vititoe2, A. A. Volkov33, A. P. Vorobiev33, H. D. Wahl13, G. Wang13, J. Warchol30, M. Wayne30, H. Weerts23, F. Wen13, A. White43, J. T. White44, J. A. Wightman17, J. Wilcox27, S. Willis28, S. J. Wimpenny7, J. V. D. Wirjawan44, J. Womersley12, E. Won37, D. R. Wood12, H. Xu4, R. Yamada12, P. Yamin3, C. Yanagisawa40, J. Yang26, T. Yasuda27, C. Yoshikawa14, S. Youssef13, J. Yu37, Y. Yu39, D. H. Zhang12, Q. Zhu26, Z. H. Zhu12, D. Zieminska16, A. Zieminski16, and A. Zylberstejn38 (D0 Collaboration)
1Universidad de los Andes, Bogotá, Colombia
2University of Arizona, Tucson, Arizona 85721
3Brookhaven National Laboratory, Upton, New York 11973
4Brown University, Providence, Rhode Island 02912
5University of California, Davis, California 95616
6University of California, Irvine, California 92717
7University of California, Riverside, California 92521
8LAFEX, Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil
9Centro de Investigación y de Estudios Avanzados, Mexico City, Mexico
10Columbia University, New York, New York 10027
11Delhi University, Delhi, India 110007
12Fermi National Accelerator Laboratory, Batavia, Illinois 60510
13Florida State University, Tallahassee, Florida 32306
14University of Hawaii, Honolulu, Hawaii 96822
15University of Illinois at Chicago, Chicago, Illinois 60607
16Indiana University, Bloomington, Indiana 47405
17Iowa State University, Ames, Iowa 50011
18Korea University, Seoul, Korea
19Kyungsung University, Pusan, Korea
20Lawrence Berkeley Laboratory and University of California, Berkeley, California 94720
21University of Maryland, College Park, Maryland 20742
22University of Michigan, Ann Arbor, Michigan 48109
23Michigan State University, East Lansing, Michigan 48824
24Moscow State University, Moscow, Russia
25University of Nebraska, Lincoln, Nebraska 68588
26New York University, New York, New York 10003
27Northeastern University, Boston, Massachusetts 02115
28Northern Illinois University, DeKalb, Illinois 60115
29Northwestern University, Evanston, Illinois 60208
30University of Notre Dame, Notre Dame, Indiana 46556
31University of Oklahoma, Norman, Oklahoma 73019
32University of Panjab, Chandigarh 16-00-14, India
33Institute for High Energy Physics, 142-284 Protvino, Russia
34Purdue University, West Lafayette, Indiana 47907
35Rice University, Houston, Texas 77251
36Universidade Estadual do Rio de Janeiro, Rio de Janeiro, Brazil
37University of Rochester, Rochester, New York 14627
38Commissariat à l'Energie Atomique, DAPNIA/Service de Physique des Particules, Centre d'Etudes de Saclay, Saclay, France
39Seoul National University, Seoul, Korea
40State University of New York, Stony Brook, New York 11794
41Superconducting Super Collider Laboratory, Dallas, Texas 75237
42Tata Institute of Fundamental Research, Colaba, Bombay 400005, India
43University of Texas, Arlington, Texas 76019
44Texas A&M University, College Station, Texas 77843
Received 20 September 1995; published in the issue dated 29 January 1996
A study of the particle multiplicity between jets with large rapidity separation has been performed using the D0 detector at the Fermilab Tevatron pp̅ Collider operating at √s = 1.8TeV. A significant excess of low-multiplicity events is observed above the expectation for color-exchange processes. The measured fractional excess is 1.07±0.10(stat)-0.13+0.25(syst)%, which is consistent with a strongly interacting color-singlet (colorless) exchange process and cannot be explained by electroweak exchange alone. A lower limit of 0.80% (95% C.L.) is obtained on the fraction of dijet events with color-singlet exchange, independent of the rapidity gap survival probability.
© 1996 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.76.734
DOI:
10.1103/PhysRevLett.76.734
PACS:
13.87.Fh, 12.38.Qk, 13.85.Hd
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