Measurements of single top quark production cross sections and |Vtb| in ppˉcollisions at √s=1.96 TeV

0379967 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … celkem 423 autorů
Measurements of single top quark production cross sections and |Vtb| in ppˉcollisions at √s=1.96 TeV.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 84, č. 11 (2011), "112001-1"-"112001-11". ISSN 1550-7998
Grant CEP: GA MŠMT LA08047
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: single production * Batavia TEVATRON Coll * transverse energy * missing-energy * CKM matrix * DZERO * anti-p p interaction
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 4.558, rok: 2011
http://prd.aps.org/abstract/PRD/v84/i11/e112001

We present measurements of production cross sections of single top quarks in /ppbar collisions at √s=1.96//TeV in a data sample corresponding to an integrated luminosity of 5.4//fb−1 collected by the D0 detector at the Fermilab Tevatron Collider. We select events with an isolated electron or muon, an imbalance in transverse energy, and two, three, or four jets, with one or two of them containing a bottom hadron. We obtain an inclusive cross section of σ(/ppbar/rargaptb+X,tqb+X)=3.43±0.730.74//pb and use it to extract the CKM matrix element 0.79<|Vtb|≤1 at the 95% C.L. We also measure σ(/ppbar/rargaptb+X)=0.68±0.380.35//pb and σ(/ppbar/rargaptqb+X)=2.86±0.690.63//pb when assuming, respectively, tqb and tb production rates as predicted by the standard model.
Trvalý link: http://hdl.handle.net/11104/0210808