Measurement of hard double-parton interactions in W $(\rightarrow \ell \nu)$ + 2-jet events at $\sqrt{s}=7$ TeV with the ATLAS detector

Bibliographic description

punktacja MNiSW [2013 A]: 40

title:	Measurement of hard double-parton interactions in W $(\rightarrow \ell \nu)$ + 2-jet events at $\sqrt{s}=7$ TeV with the ATLAS detector
author:	Richter-Wąs Elżbieta
contributor:	Współautorami artykułu są członkowie ATLAS Collaboration w liczbie 3203
institution:	ATLAS Collaboration
journal title:	New Journal of Physics
volume:	15
issue:	3
date of publication :	2013
article ID:	033038
eISSN:	1367-2630
DOI:	10.1088/1367-2630/15/3/033038
language:	English
journal language:	English
abstract in English:	The production of W bosons in association with two jets in proton–proton collisions at a centre-of-mass energy of $\sqrt{s}=7$ TeV has been analysed for the presence of double-parton interactions using data corresponding to an integrated luminosity of 36 pb$^{-1}$, collected with the ATLAS detector at the Large Hadron Collider. The fraction of events arising from double-parton interactions, $f_{DP}^{(D)}$, has been measured through the $p_{T}$ balance between the two jets and amounts to $f_{DP}^{(D)} = 0.08 \pm 0.01 (stat.) \pm 0.02 (sys.)$ for jets with transverse momentum $p_{T}$ 20 GeV and rapidity $\|\gamma\|< 2.8$. This corresponds to a measurement of the effective area parameter for hard double-parton interactions of $\sigma_{eff} = 15 \pm 3 (stat.)_{-3}^{+5} (sys.)$ mb.
number of pulisher's sheets:	2,5
affiliation:	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego
type:	journal article
subtype:	academic paper