Details

Autor(en) / Beteiligte

• Åsman, B
• Bartlett, J F
• Bazterra, V
• Beale, S
• Bean, A
• Bernhard, R
• Bertram, I
• Besançon, M
• Beuselinck, R
• Bhat, P C
• Blazey, G
• Brooijmans, G
• Buehler, M
• Buescher, V
• Bunichev, V
• Burdin, S
• Buszello, C P
• Chevalier-Théry, S
• Cho, D K
• Cousinou, M-C
• Demina, R
• DeVaughan, K
• Dominguez, A
• Eads, M
• Ellison, J
• Elvira, V D
• Filthaut, F
• Geng, W
• Gerbaudo, D
• Gerber, C E
• Gershtein, Y
• Ginther, G
• Golovanov, G
• Goussiou, A
• Greder, S
• Gregores, E M
• Grohsjean, A
• Harder, K
• Hauptman, J M
• Hays, J
• Head, T
• Hildreth, M D
• Hubacek, Z
• Illingworth, R
• Ito, A S
• Jabeen, S
• Jaffré, M
• Joshi, J
• Juste, A
• Kajfasz, E
• Katsanos, I
• Kehoe, R
• Khatidze, D
• Kohli, J M
• Kupco, A
• Lee, H S
• Lee, W M
• Linnemann, J
• Lipaev, V V
• Lobodenko, A
• Maciel, A K A
• Madar, R
• Malik, S
• Maravin, Y
• Martínez-Ortega, J
• Melnitchouk, A
• Mercadante, P G
• Meyer, J
• Miconi, F
• Neustroev, P
• Otero y Garzón, G J
• Partridge, R
• Patwa, A
• Piegaia, R
• Podstavkov, V M
• Popov, A V
• Prewitt, M
• Price, D
• Prokopenko, N
• Protopopescu, S
• Qian, J
• Sanders, M P
• Savage, G
• Scanlon, T
• Schamberger, R D
• Schwanenberger, C
• Sekaric, J
• Severini, H
• Shivpuri, R K
• Sonnenschein, L
• Stark, J
• Takahashi, M
• Tsybychev, D
• Tuchming, B
• Varnes, E W
• Vasilyev, I A
• Wayne, M
• Wicke, D
• Wyatt, T R
• Yamada, R

Titel

Measurement of spin correlation in tt production using a matrix element approach

Ist Teil von

• Physical review letters, 2011-07, Vol.107 (3), p.032001-032001

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2011

Link zum Volltext

Quelle

APS_美国物理学会过刊

Beschreibungen/Notizen

• We determine the fraction of tt events with spin correlation, assuming that the spin of the top quark is either correlated with the spin of the top antiquark as predicted by the standard model or is uncorrelated. For the first time we use a matrix-element-based approach to study tt spin correlation. We use tt → W+ b W- b → ℓ+ νbℓ- ν b final states produced in pp collisions at a center-of-mass energy sqrt(s)=1.96  TeV, where ℓ denotes an electron or a muon. The data correspond to an integrated luminosity of 5.4  fb(-1) and were collected with the D0 detector at the Fermilab Tevatron collider. The result agrees with the standard model prediction. We exclude the hypothesis that the spins of the tt are uncorrelated at the 97.7% C.L.