6533b7d4fe1ef96bd12632d9
RESEARCH PRODUCT
First measurement of the Sivers asymmetry for gluons using SIDIS data
S. V. DonskovO.yu. DenisovM. PešekC. RegaliK. KönigsmannAram KotzinianA.s. NunesD.v. PeshekhonovD. PanzieriJanusz MarzecT. GrussenmeyerP.d. EversheimR. BeckA. KerbiziM. WilfertJ. Ter WolbeekH. SuzukiC.d.r. AzevedoA. MaggioraG.v. MeshcheryakovYu. V. MikhailovS. SirtlC. AdolphArseniy RybnikovS. GerassimovS. GerassimovN. HorikawaF. GiordanoA. GrassoW.-d. NowakF. ToselloS. TessaroF. TessarottoLaura Gonzalez SilvaYu. KisselevD. HahneJ. NovýJ. NovýR. SalacM. OstrickM. StolarskiI. GnesiAndrew IvanovE.r. BielertA.g. OlshevskyF. KrinnerA. RychterS.s. DasguptaR. AkhunzyanovYu.a. KhokhlovT. SzameitatR. LongoG. NukazukaP. KremserG. D. AlexeevD.i. RyabchikovW. DünnweberM. LevillainC.-y. HsiehS.-u. ChungE. SederM. KrämerV. FrolovV. FrolovSoumen PaulM. V. ZavertyaevV. AnosovFranco BradamanteD. Von HarrachV.n. KolosovK. SchönningF. ThibaudJ. BarthCelso Augusto Guimarães SantosM. ZiembickiT. SawadaI. J. ChoiE. M. KabußA. MagnonC. QuintansM. TasevskyGerhard K. MallotE. MitrofanovR. HeitzMiroslav SulcI.a. SavinP. SchiavonF. H. HeinsiusO.p. GavrichtchoukM. ChiossoMartin BodlakL. SinhaFrançois HerrmannT. WeisrockT. MatsudaA. ZinkTakahiro IwataG.v. KhaustovFabrice GautheronH. MatsudaV. TskhayAlexandr SelyuninN.s. RogachevaK. KurekV. AndrieuxV. AndrieuxAdam SzabelskiM. MeyerM. MeyerL. DharaC. BraunB. MarianskiM. Grosse PerdekampM.g. AlexeevA.v. EfremovB. BadelekS. UhlA. VauthF. KunneBakur ParsamyanW. EyrichNour MakkeJ. GiarraW. C. ChangS. GrabmüllerMichal DziewieckiB. KetzerM. RoskotS. TakekawaAnne-laure MartinF. PereiraA. AntoshkinS. PlatchkovP. ZavadaH. SchmiedenJ.m. FriedrichW. MeyerMaria Liz CrespoJ. PretzK. ZarembaM. SluneckaV.a. PolyakovS. HuberV. JaryV.f. KonstantinovM. GorzellikS. WallnerS. IshimotoKamil AugstenKamil AugstenE. ZemlyanichkinaH. FischerM. AghasyanG. SbrizzaiJohannes BernhardJohannes BernhardCh. DreisbachP. BordaloA. GuskovA. AmorosoJ. PochodzallaYakov Petrovich KulinichAndrea BressanA. NagaytsevN. Du Fresne Von HohenescheN. Du Fresne Von HohenescheF. BalestraN. I. ZhuravlevN. PierreN. PierreM. FingerF. HaasN. C. R. MakinsK. BickerK. BickerE. FucheyR. BirsaJ. LichtenstadtC. RiedlJan MatousekJan MatousekM. QuaresmaD. NeyretNikolay AnfimovR. JoostenS. DasguptaJ. VondraA. AustregesiloY.-s. LianJ.f.c.a. VelosoK. KondoY. BedferO.m. KouznetsovA. SrnkaC. ChatterjeeZ.v. KroumchteinV. DuicW. AugustyniakS. RamosK. SchmidtP. SznajderAndrea FerreroNorihiro DoshitaN. D'hoseD. SteffenD. SteffenJ. SmolikO. SubrtO. SubrtA. LehmannA. ThielQ. CurielK. KlimaszewskiY. MiyachiA.a. LednevAndres CicuttinI. OrlovV.d. SamoylenkoG. ReicherzS. Dalla TorreFrank KleinI. KonorovI. KonorovA. SandaczC. FrancoJen-chieh PengMarkus BallYu. IvanshinF. NerlingG. HamarM. BücheleMikhail MikhasenkoM. FaesslerJ.h. KoivuniemiJ.h. KoivuniemiB. GrubeR.p. KurjataM. ViriusP. JörgS. LevoratoN. MitrofanovS. Sarkarsubject
hadron: angular distributionmuon+: polarized beamNuclear TheoryPartonmuon+ deuteron: deep inelastic scatteringhadron: transverse momentumtransverse momentum dependence01 natural sciencesCOMPASSHigh Energy Physics - ExperimentSubatomär fysikSivers functionHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)photon gluon: fusionSubatomic Physics[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]partonNuclear Experimentmedia_commonQuantum chromodynamicsPhysicsgluon: distribution functiondeep inelastic scattering: semi-inclusive reactionhigher-order: 0polarized target: transversehep-phDeep inelastic scattering; Gluon; PDF; Sivers; TMD; Nuclear and High Energy Physicslcsh:QC1-999High Energy Physics - PhenomenologySivereffect: CollinsNucleonCompton scatteringnumerical calculations: Monte Carlospin: asymmetryParticle Physics - ExperimentDeep inelastic scatteringQuarkParticle physicsNuclear and High Energy Physicsdata analysis methoddeuteron: polarized targethadron: asymmetryangular distribution: asymmetryneural networkmedia_common.quotation_subjectpolarization: longitudinalFOS: Physical sciencesAsymmetryPDFGluonNuclear physics[ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex]0103 physical sciencesquantum chromodynamicsSivers010306 general physicsParticle Physics - Phenomenology010308 nuclear & particles physicshep-ex160 GeV/cHigh Energy Physics::PhenomenologyTMDnucleon: spin: transverseCERN SPSDeep inelastic scatteringGluonmuon+ p: deep inelastic scatteringcorrelation[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph][ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph]High Energy Physics::Experimentabsorptionlcsh:PhysicsLeptonexperimental resultsdescription
The Sivers function describes the correlation between the transverse spin of a nucleon and the transverse motion of its partons. It was extracted from measurements of the azimuthal asymmetry of hadrons produced in semi-inclusive deep inelastic scattering of leptons off transversely polarised nucleon targets, and it turned out to be non-zero for quarks. In this letter the evaluation of the Sivers asymmetry for gluons in the same process is presented. The analysis method is based on a Monte Carlo simulation that includes three hard processes: photon-gluon fusion, QCD Compton scattering and leading-order virtual-photon absorption process. The Sivers asymmetries of the three processes are simultaneously extracted using the LEPTO event generator and a neural network approach. The method is applied to samples of events containing at least two hadrons with large transverse momentum from the COMPASS data taken with a 160 GeV/$c$ muon beam scattered off transversely polarised deuterons and protons. With a significance of more than two standard deviations a negative value is obtained for the gluon Sivers asymmetry. The result of a similar analysis for a Collins-like asymmetry for gluons is consistent with zero.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-10 |