Dilepton-tagged 

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

Mironov, C.; Vogt, R.; Kunde, G. J.

doi:10.1140/epjc/s10052-009-0929-y

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…The azimuthal distributions of dimuons from QQ pair decays are relatively isotropic when no cuts are applied. This is not unexpected since the QQ pairs are produced back-to-back only at leading order while at NLO the pairs are often accompanied by a third hard parton (jet), randomizing the azimuthal distributions [36].…”

Section: Muons From Heavy Mesonsmentioning

confidence: 99%

“…The decay chain DD/BB → μμ + X also produces muon pairs. Previous LHC studies of heavy flavor decays [35,36] were performed using the HVQMNR [37] code which calculates exclusive heavy quark production at next-to-leading order. The azimuthal distributions of dimuons from QQ pair decays are relatively isotropic when no cuts are applied.…”

Section: Muons From Heavy Mesonsmentioning

confidence: 99%

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Dilepton-tagged jets in heavy-ion collisions at the LHC

Mironov

Castro

Constantin

et al. 2011

J. Phys. G: Nucl. Part. Phys.

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The properties of the matter created at RHIC will be further investigated at the LHC. High transverse momentum jets will play a key role in these studies. In this paper, we discuss a jet observable newly accessible at the LHC: decays of high transverse momentum γ * and Z 0 to lepton pairs in association with quark or gluon jets. Semileptonic BB and DD decays to dileptons, the main backgrounds, are investigated at next-to-leading order using HVQMNR, an exclusive next-to-leading order QQ calculation. By comparing the γ * /Z 0 +jet signal to the heavy flavor + jet background rate, we determine whether this new jet observable is viable.

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Section: Muons From Heavy Mesonsmentioning

confidence: 99%

Section: Muons From Heavy Mesonsmentioning

confidence: 99%

Dilepton-tagged jets in heavy-ion collisions at the LHC

Mironov

Castro

Constantin

et al. 2011

J. Phys. G: Nucl. Part. Phys.

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Heavy flavor azimuthal correlations in cold nuclear matter

Vogt

2018

Phys. Rev. C

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Background: It has been proposed that the azimuthal distributions of heavy flavor quarkantiquark pairs may be modified in the medium of a heavy-ion collision. Purpose: This work tests this proposition through next-to-leading order (NLO) calculations of the azimuthal distribution, dσ/dφ, including transverse momentum broadening, employing k 2 T and fragmentation in exclusive QQ pair production. While these studies were done for p+p, p+p and p+Pb collisions, understanding azimuthal angle correlations between heavy quarks in these smaller, colder systems is important for their interpretation in heavy-ion collisions. Methods: First, single inclusive pT distributions calculated with the exclusive HVQMNR code are compared to those calculated in the fixed-order next-to-leading logarithm approach. Next the azimuthal distributions are calculated and sensitivities to k 2 T , pT cut, and rapidity are studied at √ s = 7 TeV. Finally, calculations are compared to QQ data in elementary p + p and p + p collisions at √ s = 7 TeV and 1.96 TeV as well as to the nuclear modification factor R pPb (pT ) in p+Pb collisions at √ sNN = 5.02 TeV measured by ALICE. Results: The low pT (pT < 10 GeV) azimuthal distributions are very sensitive to the kT broadening and rather insensitive to the fragmentation function. The NLO contributions can result in an enhancement at φ ∼ 0 absent any other effects. Agreement with the data was found to be good. Conclusions: The NLO calculations, assuming collinear factorization and introducing kT broadening, result in significant modifications of the azimuthal distribution at low pT which must be taken into account in calculations of these distributions in heavy-ion collisions.

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

Cited by 2 publications

References 12 publications

Dilepton-tagged jets in heavy-ion collisions at the LHC

Dilepton-tagged jets in heavy-ion collisions at the LHC

Heavy flavor azimuthal correlations in cold nuclear matter

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