Details

Autor(en) / Beteiligte

• Abazov, V.M.
• Abbott, B.
• Acharya, B.S.
• Adams, M.
• Adams, T.
• Alexeev, G.D.
• Alkhazov, G.
• Alton, A.
• Alverson, G.
• Alves, G.A.
• Aoki, M.
• Askew, A.
• Asman, B.
• Atkins, S.
• Atramentov, O.
• Augsten, K.
• Avila, C.
• Backusmayes, J.
• Badaud, F.
• Bagby, L.
• Baldin, B.
• Bandurin, D.V.
• Banerjee, S.
• Barberis, E.
• Baringer, P.
• Barreto, J.
• Bartlett, J.F.
• Bassler, U.
• Bazterra, V.
• Bean, A.
• Begalli, M.
• Belanger-Champagne, C.
• Bellantoni, L.
• Beri, S.B.
• Bernardi, G.
• Bernhard, R.
• Bertram, I.
• Besançon, M.
• Beuselinck, R.
• Bezzubov, V.A.
• Bhat, P.C.
• Bhatnagar, V.
• Blazey, G.
• Blessing, S.
• Bloom, K.
• Boehnlein, A.
• Boline, D.
• Boos, E.E.
• Borissov, G.
• Bose, T.
• Brandt, A.
• Brandt, O.
• Brock, R.
• Brooijmans, G.
• Bross, A.
• Brown, D.
• Brown, J.
• Bu, X.B.
• Buehler, M.
• Buescher, V.
• Bunichev, V.
• Burdin, S.
• Burnett, T.H.
• Buszello, C.P.
• Calpas, B.
• Camacho-Pérez, E.
• Carrasco-Lizarraga, M.A.
• Casey, B.C.K.
• Castilla-Valdez, H.
• Chakrabarti, S.
• Chakraborty, D.
• Chan, K.M.
• Chandra, A.
• Chapon, E.
• Chen, G.
• Chevalier-Théry, S.
• Cho, D.K.
• Cho, S.W.
• Choi, S. K.
• Choudhary, B.
• Cihangir, S.
• Claes, D.
• Clutter, J.
• Cooke, M.
• Cooper, W.E.
• Corcoran, M.
• Couderc, F.
• Cousinou, M.-C.
• Croc, A.
• Cutts, D.
• Das, A.
• Davies, G.
• De, K.
• de Jong, S.J.
• de La Cruz-Burelo, E.
• Déliot, F.
• Demina, R.
• Denisov, D.
• Denisov, S.P.
• Desai, S.

Titel

Evidence for spin correlation in ttbar production

Ist Teil von

• Physical review letters, 2012, Vol.108

Ort / Verlag

American Physical Society

Erscheinungsjahr

2012

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We present a measurement of the ratio of events with correlated t and tbar spins to the total number of ttbar events. This ratio f is evaluated using a matrix-element-based approach in events with a single lepton (electron or muon) and at least four jets. We analyze ppbar collisions data corresponding to an integrated luminosity of 5.3 fb^-1 collected with the D0 detector at the Fermilab Tevatron collider operating at a center of mass energy $\sqrt{s}=1.96$ TeV. Combining this result with a recent measurement of f in dilepton final states, we find f in agreement with the standard model. In addition, the combination provides evidence for the presence of spin correlation in ttbar events with a significance of more than three standard deviations.