Leading order determination of the gluon polarisation from DIS events with high-pT hadron pairs

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F13%3A00390817" target="_blank" >RIV/68081731:_____/13:00390817 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/13:00199445 RIV/46747885:24220/13:#0002488 RIV/00216208:11320/13:10133623
Result on the web
<a href="http://dx.doi.org/10.1016/j.physletb.2012.11.056" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2012.11.056</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2012.11.056" target="_blank" >10.1016/j.physletb.2012.11.056</a>

Result language
angličtina
Original language name
Leading order determination of the gluon polarisation from DIS events with high-pT hadron pairs
Original language description
We present a determination of the gluon polarisation Delta g/g in the nucleon, based on the longitudinal double-spin asymmetry of DIS events with Q(2) > 1 (GeV/c)(2) including a pair of large transverse-momentum hadrons in the final state. The data wereobtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam scattering off a polarised (LiD)-Li-6 target. The gluon polarisation is evaluated by a Neural Network approach for three intervals of the gluon momentum fraction x(g) covering the range 0.04 < x(g) < 0.27. The values obtained at leading order in QCD do not show any significant dependence on x(g). Their average is Delta g/g = 0.125 +/- 0.060 (stat.) +/- 0.063 (syst.) at average x(g) = 0.09 and a scale of mu(2) = 3 (GeV/c)(2).
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Project
<a href="/en/project/LA08015" target="_blank" >LA08015: Collaboration of the Czech Republic with CERN</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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