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Issue Eur. Phys. J. C
Volume 61, Number 4, June 2009
Hard Probes 2008
Page(s) 893 - 898
Section Regular Article - Experimental Physics
DOI 10.1140/epjc/s10052-009-0929-y
Published online 05 March 2009

Eur. Phys. J. C 61, 893-898 (2009)
DOI: 10.1140/epjc/s10052-009-0929-y

Dilepton-tagged $Q\overline{Q}+\mathrm{jet}$ events at the LHC

Camelia Mironov1, Ramona Vogt2, 3 and Gerd J. Kunde1

1  Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM, USA
2  Lawrence Livermore National Laboratory, PO Box 808, Livermore, CA, USA
3  Physics Department, UC Davis, Davis, CA, USA

camelia.mironov@cern.ch

Received 13 September 2008 / Revised version 16 December 2008 / Published online 5 March 2009

Abstract

We propose a new method for identifying and isolating $Q\overline{Q}+\mathrm{jet}$ events through semileptonic decays of the $Q\overline{Q}$ pair. Employing these decay dileptons to tag the jet in a specific kinematic region provides a clean signature of jets associated with heavy-quark production. The measurement, in both pp and heavy-ion collisions, is essential for addressing heavy-quark fragmentation in vacuum and in a dense medium. We present next-to-leading order calculations of $Q\overline{Q}$ production (leading order in $Q\overline{Q}+\mathrm{jet}$ production) in $\sqrt{s}=14$ TeV pp collisions at the LHC and discuss the feasibility of the measurement in heavy-ion collisions at $\sqrt{s_}=5.5$ TeV.

PACS
13.87.Ce
24.85.+p
25.75.Cj
12.38.Qk

Correspondence: camelia.mironov@cern.ch


© Società Italiana di Fisica, Springer-Verlag 2009


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