TY  - JOUR
AU  - Chatrchyan, S.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Ekmedžić, Marko
AU  - Krpić, D.
AU  - Milošević, Jovan
AU  - Milenović, Predrag
AU  - Reković, Vladimir
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6014
AB  - Measurements are presented of the associated production of a W boson and a charm-quark jet (W + c) in pp collisions at a center-of-mass energy of 7 TeV. The analysis is conducted with a data sample corresponding to a total integrated luminosity of 5 fb(-1), collected by the CMS detector at the LHC. W boson candidates are identified by their decay into a charged lepton (muon or electron) and a neutrino. The W + c measurements are performed for charm-quark jets in the kinematic region p(T)(jet) GT 25 GeV, vertical bar eta(jet)vertical bar LT 2.5, for two different thresholds for the transverse momentum of the lepton from the W-boson decay, and in the pseudorapidity range eta(l) LT 2.1. Hadronic and inclusive semileptonic decays of charm hadrons are used to measure the following total cross sections: sigma(pp - GT W + c + X) x B (W - GT lv) = 107.7 +/- 3.3 (stat.) +/- 6.9 (syst.) pb (p(T)(l) GT 25 GeV) and sigma (pp - GT W + c + X) x B (W - GT lv) = 84.1 +/- 2.0 (stat.) +/- 4.9 (syst.) pb (p(T)(l) GT 35 GeV), and the cross section ratios sigma(pp - GT W+ + (c) over bar + X)/sigma(pp - GT W- + c + X) = 0.954 +/- 0.025 (stat.) +/- 0.004 (syst.) (p(T)(l) GT 25 GeV) and sigma(pp - GT W+ + (c) over bar + X)/sigma(pp - GT W- + c + X) = 0.938 +/- 0.019 (stat.) +/- 0.006 (syst.) (p(T)(l) GT 35 GeV). Cross sections and cross section ratios are also measured differentially with respect to the absolute value of the pseudorapidity of the lepton from the W-boson decay. These are the first measurements from the LHC directly sensitive to the strange quark and antiquark content of the proton. Results are compared with theoretical predictions and are consistent with the predictions based on global fits of parton distribution functions.
T2  - Journal of High Energy Physics
T1  - Measurement of associated W plus charm production in pp collisions at root s=7 TeV
IS  - 2
DO  - 10.1007/JHEP02(2014)013
ER  - 

@article{
author = "Chatrchyan, S. and Adžić, Petar and Đorđević, Miloš and Ekmedžić, Marko and Krpić, D. and Milošević, Jovan and Milenović, Predrag and Reković, Vladimir",
year = "2014",
abstract = "Measurements are presented of the associated production of a W boson and a charm-quark jet (W + c) in pp collisions at a center-of-mass energy of 7 TeV. The analysis is conducted with a data sample corresponding to a total integrated luminosity of 5 fb(-1), collected by the CMS detector at the LHC. W boson candidates are identified by their decay into a charged lepton (muon or electron) and a neutrino. The W + c measurements are performed for charm-quark jets in the kinematic region p(T)(jet) GT 25 GeV, vertical bar eta(jet)vertical bar LT 2.5, for two different thresholds for the transverse momentum of the lepton from the W-boson decay, and in the pseudorapidity range eta(l) LT 2.1. Hadronic and inclusive semileptonic decays of charm hadrons are used to measure the following total cross sections: sigma(pp - GT W + c + X) x B (W - GT lv) = 107.7 +/- 3.3 (stat.) +/- 6.9 (syst.) pb (p(T)(l) GT 25 GeV) and sigma (pp - GT W + c + X) x B (W - GT lv) = 84.1 +/- 2.0 (stat.) +/- 4.9 (syst.) pb (p(T)(l) GT 35 GeV), and the cross section ratios sigma(pp - GT W+ + (c) over bar + X)/sigma(pp - GT W- + c + X) = 0.954 +/- 0.025 (stat.) +/- 0.004 (syst.) (p(T)(l) GT 25 GeV) and sigma(pp - GT W+ + (c) over bar + X)/sigma(pp - GT W- + c + X) = 0.938 +/- 0.019 (stat.) +/- 0.006 (syst.) (p(T)(l) GT 35 GeV). Cross sections and cross section ratios are also measured differentially with respect to the absolute value of the pseudorapidity of the lepton from the W-boson decay. These are the first measurements from the LHC directly sensitive to the strange quark and antiquark content of the proton. Results are compared with theoretical predictions and are consistent with the predictions based on global fits of parton distribution functions.",
journal = "Journal of High Energy Physics",
title = "Measurement of associated W plus charm production in pp collisions at root s=7 TeV",
number = "2",
doi = "10.1007/JHEP02(2014)013"
}

Chatrchyan, S., Adžić, P., Đorđević, M., Ekmedžić, M., Krpić, D., Milošević, J., Milenović, P.,& Reković, V.. (2014). Measurement of associated W plus charm production in pp collisions at root s=7 TeV. in Journal of High Energy Physics(2).
https://doi.org/10.1007/JHEP02(2014)013

Chatrchyan S, Adžić P, Đorđević M, Ekmedžić M, Krpić D, Milošević J, Milenović P, Reković V. Measurement of associated W plus charm production in pp collisions at root s=7 TeV. in Journal of High Energy Physics. 2014;(2).
doi:10.1007/JHEP02(2014)013 .

Chatrchyan, S., Adžić, Petar, Đorđević, Miloš, Ekmedžić, Marko, Krpić, D., Milošević, Jovan, Milenović, Predrag, Reković, Vladimir, "Measurement of associated W plus charm production in pp collisions at root s=7 TeV" in Journal of High Energy Physics, no. 2 (2014),
https://doi.org/10.1007/JHEP02(2014)013 . .