|
Title
|
|
|
|
Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at
| |
|
Author
|
|
|
|
| |
|
Institution/Organisation
|
|
|
|
CMS Collaboration
| |
|
Abstract
|
|
|
|
| The first measurement of vector-boson production associated with a top quark-antiquark pair in proton-proton collisions at root s = 7 TeV is presented. The results are based on a data set corresponding to an integrated luminosity of 5.0 fb(-1), recorded by the CMS detector at the LHC in 2011. The measurement is performed in two independent channels through a trilepton analysis of t (t) over barZ events and a same-sign dilepton analysis of t (t) over barV (V = W or Z) events. In the trilepton channel a direct measurement of the t (t) over barZ cross section sigma(t (t) over barZ) = 0.28(-0.11)(+0.14) (stat)(-0.03)(+0.06) (syst) pb is obtained. In the dilepton channel a measurement of the t (t) over barV cross section yields sigma(t (t) over barV) = 0.43(-0.15)(+0.17) (stat)(-0.07)(+0.09) (syst) pb. These measurements have a significance, respectively, of 3.3 and 3.0 standard deviations from the background hypotheses and are compatible, within uncertainties, with the corresponding next-to-leading order predictions of 0.137(-0.016)(+0.012) and 0.306(-0.053)(+0.031) pb. DOI: 10.1103/PhysRevLett.110.172002 |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Physical review letters. - New York, N.Y., 1958, currens
| |
|
Publication
|
|
|
|
New York, N.Y.
:
American Physical Society
,
2013
| |
|
ISSN
|
|
|
|
0031-9007
[print]
1079-7114
[online]
| |
|
DOI
|
|
|
|
10.1103/PHYSREVLETT.110.172002
| |
|
Volume/pages
|
|
|
|
110
:17
(2013)
, p. 1-15
| |
|
Article Reference
|
|
|
|
172002
| |
|
ISI
|
|
|
|
000318188100004
| |
|
Medium
|
|
|
|
E-only publicatie
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|