6533b827fe1ef96bd1285a20
RESEARCH PRODUCT
Leading order determination of the gluon polarisation from DIS events with high-pThadron pairs
S. KoblitzS. RamosF. HaasR. GeyerR. PankninE. RondioFabrice GautheronM. A. FaesslerV.yu. AlexakhinJ. PolakV.n. KolosovChristian SchillN.s. RossiyskayaF. KunneR. JahnF. TessarottoC. HeßC. AdolphA. KorzenevA. GrassoJ. M. Le GoffD. ChabernyV. DuicE. M. KabußO.p. GavrichtchoukA.a. LednevA. NagaytsevF. BalestraA. SrnkaL. SinhaT. MatsudaG. D. AlexeevF. NerlingA.v. EfremovW. DünnweberYu.v. MikhailovR. GushterskiYu. AlexandrovYu. KisselevGeorge I. SmirnovS. HedickeZ.v. KroumchteinI.a. SavinS. GrabmüllerI. KonorovI. KonorovW.-d. NowakO.yu. DenisovA. ZvyaginM. OstrickBakur ParsamyanC. QuintansK. ZarembaAlessandro BressanD. Von HarrachS. GerassimovS. GerassimovG. PiraginoT. GuthörlN. HorikawaSergey DonskovL. DharaS. IshimotoFrank KleinC. BraunV.a. PolyakovG. SbrizzaiCh. HöppnerA. AmorosoS. UhlS.u. ChungL. SchmittOleg V. IvanovMaxence VandenbrouckeB. BadelekR. BirsaMatthias SchottN. Du Fresne Von HohenescheN. Du Fresne Von HohenescheT. SchlüterM. GiorgiMichal DziewieckiE. PerevalovaS. TessaroE. RoccoA. RichterK. KlimaszewskiS. DasR. GazdaM. ChiossoA.g. OlshevskyLaura SilvaB. KetzerI. UmanA. MorrealeAndres CicuttinA. FilinA. MagnonG. ReicherzR. JoostenV.d. SamoylenkoK. KurekA. PadeeL. G. TkatchevYu.a. KhokhlovD. NeyretS. PaulJ. PochodzallaM. StolarskiJ.m. FriedrichK. BickerK. BickerR. BertiniAndrea FerreroS. Dalla TorreJ. BisplinghoffS. HuberG.v. KhaustovS.s. DasguptaA. MutterA. MutterJean-francois RajotteD.i. RyabchikovA.s. NunesVladimir NikolaenkoMiroslav SulcAram KotzinianF. HinterbergerP. BordaloD. KangR. WindmoldersH. WollnyD. PanzieriL. LauserO. KouznetsovE. ZemlyanichkinaW. MeyerMaria Liz CrespoJ. LichtenstadtJ. MarzecYu. IvanshinM.g. AlekseevP. JasinskiFranco BradamanteM. V. ZavertyaevAnne-laure MartinK. SchönningAlexey AntonovA. BravarP. SznajderJ. Ter WolbeekJohannes BernhardJ. NassalskiS. SosioS. TakekawaM. BettinelliMichael KramerA. GuskovK. KondoK. KondoJ. BarthY. BedferE. BurtinV.f. KonstantinovA. LehmannC. FrancoJ.h. KoivuniemiC. MarchandGerhard K. MallotS. GoertzS. GoertzV. RapatskySarben SarkarH. FischerP. SchiavonK. KönigsmannA. MaggioraB. GrubeN. DʼhoseN.v. VlassovGünter BaumO.yu. ShevchenkoS. LevoratoR. GarfagniniM. FingerMurray MoinesterFrançois HerrmannS. PlatchkovLei WangM. SluneckaM. ViriusW. WiślickiG.b. PontecorvoB. GobboN. I. ZhuravlevFederica SozziS. SchopfererT. NagelJ. PretzR. SulejS. ProcureurT. MichigamiA. MannW. EyrichNour MakkeJ. BielingA. SandaczM. QuaresmaM.g. SapozhnikovK. SchmidtD.v. PeshekhonovNorihiro DoshitaNorihiro DoshitaA. N. SissakianG. PesaroI. GnesiP.d. EversheimS. NeubertT. IwataM. ZiembickiF. H. HeinsiusA. AustregesiloA. AustregesiloC. Eliasubject
PhysicsQuantum chromodynamicsNuclear and High Energy PhysicsParticle physicsMuonProton010308 nuclear & particles physicsHadronDeep inelastic scattering01 natural sciencesGluonNuclear physics0103 physical sciencesCOMPASS experimentHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsNucleondescription
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 were obtained 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).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-01-01 | Physics Letters B |