期刊
PHYSICS LETTERS B
卷 702, 期 1, 页码 16-23出版社
ELSEVIER
DOI: 10.1016/j.physletb.2011.05.077
关键词
Top quark; Spin; QCD
资金
- DOE
- NSF (USA)
- CEA
- CNRS/IN2P3 (France)
- FASI
- Rosatom
- RFBR (Russia)
- CNPq
- FAPERJ
- FAPESP
- FUNDUNESP (Brazil)
- DAE
- DST (India)
- Colciencias (Colombia)
- CONACyT (Mexico)
- KRF
- KOSEF (Korea)
- CONICET
- UBACyT (Argentina)
- FOM (The Netherlands)
- STFC
- Royal Society (United Kingdom)
- MSMT
- GACR (Czech Republic)
- CRC
- NSERC (Canada)
- BMBF
- DFG (Germany)
- SFI (Ireland)
- The Swedish Research Council (Sweden)
- CAS
- CNSF (China)
- STFC [ST/J501074/1, PP/F000863/1, ST/I505756/1, ST/H00095X/2, ST/F007418/1, ST/H00095X/1, ST/H001166/1, ST/F00754X/1, PP/E000487/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H00095X/1, ST/J501074/1, ST/H001166/1, ST/H00095X/2, PP/E000487/1, PP/F000863/1, PP/D004284/1, ST/F00754X/1, ST/I505756/1, ST/F007418/1] Funding Source: researchfish
- ICREA Funding Source: Custom
We measure the correlation between the spin of the top quark and the spin of the anti-top quark in t (t) over bar -> W(+)bW(-)(b) over bar -> l(+)vbl(-) (v) over bar(b) over bar final states produced in p (p) over bar collisions at a center of mass energy root s = 1.96 TeV, where l is an electron or 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 correlation is extracted from the angles of the two leptons in the t and (t) over bar rest frames, yielding a correlation strength C = 0.10(-0.45)(+0.45). in agreement with the NLO QCD prediction within two standard deviations, but also in agreement with the no correlation hypothesis. (C) 2011 Elsevier B.V. All rights reserved.
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