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Spin correlation in $t\overline{t}$ production from $p\overline{p}$ collisions at $\sqrt{s} = 1.8 TeV$

B. Abbott M. Abolins V. Abramov B.S. Acharya D.L. Adams M. Adams V. Akimov G.A. Alves N. Amos E.W. Anderson M.M. Baarmand V.V. Babintsev L. Babukhadia A. Baden B. Baldin S. Banerjee J. Bantly E. Barberis P. Baringer J.F. Bartlett U. Bassler 1 A. Bean A. Belyaev S.B. Beri G. Bernardi 1 I. Bertram V.A. Bezzubov P.C. Bhat V. Bhatnagar M. Bhattacharjee G. Blazey S. Blessing A. Boehnlein N.I. Bojko F. Borcherding A. Brandt R. Breedon G. Briskin R. Brock G. Brooijmans A. Bross D. Buchholz V. Buescher V.S. Burtovoi J.M. Butler W. Carvalho D. Casey Z. Casilum H. Castilla-Valdez D. Chakraborty K.M. Chan S.V. Chekulaev W. Chen D.K. Cho S. Choi S. Chopra B.C. Choudhary J.H. Christenson M. Chung D. Claes A.R. Clark W.G. Cobau J. Cochran L. Coney B. Connolly W.E. Cooper D. Coppage D. Cullen-Vidal M.A.C. Cummings D. Cutts O.I. Dahl K. Davis K. De K.Del. Signore M. Demarteau D. Denisov S.P. Denisov H.T. Diehl M. Diesburg G.Di. Loreto P. Draper Y. Ducros L.V. Dudko S.R. Dugad A. Dyshkant D. Edmunds J. Ellison V.D. Elvira R. Engelmann S. Eno G. Eppley P. Ermolov O.V. Eroshin J. Estrada H. Evans V.N. Evdokimov T. Fahland S. Feher D. Fein T. Ferbel H.E. Fisk Y. Fisyak E. Flattum F. Fleuret M. Fortner K.C. Frame S. Fuess E. Gallas A.N. Galyaev P. Gartung V. Gavrilov R.J. Genik K. Genser C.E. Gerber Y. Gershtein B. Gibbard R. Gilmartin G. Ginther B. Gobbi B. Gomez G. Gomez P.I. Goncharov J.L. Gonzalez Solis H. Gordon L.T. Goss K. Gounder A. Goussiou N. Graf P.D. Grannis J.A. Green H. Greenlee S. Grinstein P. Grudberg S. Grunendahl G. Guglielmo Anupam Gupta S.N. Gurzhev G. Gutierrez P. Gutierrez N.J. Hadley H. Haggerty S. Hagopian V. Hagopian K.S. Hahn R.E. Hall P. Hanlet Scott Hansen J.M. Hauptman C. Hays Christian Hebert D. Hedin A.P. Heinson U. Heintz T. Heuring R. Hirosky J.D. Hobbs B. Hoeneisen J.S. Hoftun A.S. Ito S.A. Jerger R. Jesik T. Joffe-Minor K. Johns M. Johnson A. Jonckheere M. Jones H. Jostlein S.Y. Jun A. Juste S. Kahn E. Kajfasz 2 D. Karmanov D. Karmgard R. Kehoe S.K. Kim B. Klima C. Klopfenstein B. Knuteson W. Ko J.M. Kohli A.V. Kostritsky J. Kotcher A.V. Kotwal A.V. Kozelov E.A. Kozlovsky J. Krane M.R. Krishnaswamy S. Krzywdzinski M. Kubantsev S. Kuleshov Y. Kulik S. Kunori G. Landsberg A. Leflat F. Lehner J. Li Q.Z. Li J.G.R. Lima D. Lincoln S.L. Linn J. Linnemann R. Lipton J.G. Lu A. Lucotte L. Lueking C. Lundstedt A.K.A. Maciel R.J. Madaras V. Manankov S. Mani H.S. Mao R. Markeloff T. Marshall M.I. Martin R.D. Martin K.M. Mauritz B. May A.A. Mayorov R. Mccarthy J. Mcdonald T. Mckibben T. Mcmahon H.L. Melanson M. Merkin K.W. Merritt C. Miao H. Miettinen D. Mihalcea A. Mincer C.S. Mishra N. Mokhov N.K. Mondal H.E. Montgomery M. Mostafa H.Da. Motta E. Nagy 2 F. Nang M. Narain V.S. Narasimham H.A. Neal J.P. Negret S. Negroni 2 D. Norman L. Oesch V. Oguri B. Olivier 1 N. Oshima P. Padley L.J. Pan A. Para N. Parashar R. Partridge N. Parua 3 M. Paterno A. Patwa B. Pawlik J. Perkins M. Peters R. Piegaia H. Piekarz B.G. Pope E. Popkov H.B. Prosper S. Protopopescu J. Qian P.Z. Quintas R. Raja S. Rajagopalan N.W. Reay S. Reucroft M. Rijssenbeek T. Rockwell M. Roco P. Rubinov R. Ruchti J. Rutherfoord A. Santoro L. Sawyer R.D. Schamberger H. Schellman A. Schwartzman J. Sculli N. Sen E. Shabalina H.C. Shankar R.K. Shivpuri D. Shpakov M. Shupe R.A. Sidwell H. Singh J.B. Singh V. Sirotenko P. Slattery E. Smith R.P. Smith R. Snihur G.R. Snow J. Snow S. Snyder J. Solomon X.F. Song V. Sorin M. Sosebee N. Sotnikova M. Souza N.R. Stanton G. Steinbruck R.W. Stephens M.L. Stevenson F. Stichelbaut D. Stoker V. Stolin D.A. Stoyanova M. Strauss K. Streets M. Strovink L. Stutte A. Sznajder J. Tarazi W. Taylor S. Tentindo-Repond T.L.T. Thomas J. Thompson D. Toback T.G. Trippe A.S. Turcot P.M. Tuts P.Van. Gemmeren V. Vanev N. Varelas A.A. Volkov A.P. Vorobev H.D. Wahl H. Wang J. Warchol G. Watts M. Wayne H. Weerts A. White J.T. White D. Whiteson J.A. Wightman S. Willis S.J. Wimpenny J.V.D. Wirjawan J. Womersley D.R. Wood R. Yamada P. Yamin T. Yasuda K. Yip S. Youssef J. Yu Z. Yu M. Zanabria H. Zheng Z. Zhou Z.H. Zhu M. Zielinski D. Zieminska A. Zieminski V. Zutshi E.G. Zverev A. Zylberstejn
Abstract : he D0 collaboration has performed a study of spin correlation in tt-bar production for the process tt-bar to bb-bar W^+W^-, where the W bosons decay to e-nu or mu-nu. A sample of six events was collected during an exposure of the D0 detector to an integrated luminosity of approximately 125 pb^-1 of sqrt{s}=1.8 TeV pp-bar collisions. The standard model (SM) predicts that the short lifetime of the top quark ensures the transmission of any spin information at production to the tt-bar decay products. The degree of spin correlation is characterized by a correlation coefficient k. We find that k -0.25 at the 68% confidence level, in agreement with the SM prediction of k=0.88.
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Submitted on : Monday, July 17, 2000 - 3:01:32 PM
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  • HAL Id : in2p3-00005600, version 1

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B. Abbott, M. Abolins, V. Abramov, B.S. Acharya, D.L. Adams, et al.. Spin correlation in $t\overline{t}$ production from $p\overline{p}$ collisions at $\sqrt{s} = 1.8 TeV$. Physical Review Letters, American Physical Society, 2000, 85, pp.256-261. ⟨in2p3-00005600⟩

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