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Longitudinal double-spin asymmetry for inclusive jet and dijet production in pp collisions at $\sqrt{s} = 510$ GeV

The STAR collaboration
Phys.Rev.D 100 (2019) 052005, 2019.

Abstract (data abstract)
We report the first measurement of the inclusive jet and the dijet longitudinal double-spin asymmetries, ALL, at midrapidity in polarized pp collisions at a center-of-mass energy s√=510 GeV. The inclusive jet ALL measurement is sensitive to the gluon helicity distribution down to a gluon momentum fraction of x≈0.015, while the dijet measurements, separated into four jet-pair topologies, provide constraints on the x dependence of the gluon polarization. Both results are consistent with previous measurements made at s√=200 GeV in the overlapping kinematic region, x>0.05, and show good agreement with predictions from recent next-to-leading order global analyses.

  • Figure 1 (200GeV)

    Data from Figure 1 (200GeV)

    10.17182/hepdata.105278.v1/t1

    Fractions of the next-to-leading-order cross section for inclusive jet production arising from quark-quark, quark-gluon and gluon-gluon scattering in pp collisions...

  • Figure 1 (500GeV)

    Data from Figure 1 (500GeV)

    10.17182/hepdata.105278.v1/t2

    Fractions of the next-to-leading-order cross section for inclusive jet production arising from quark-quark, quark-gluon and gluon-gluon scattering in pp collisions...

  • Figure 2 (JP0)

    Data from Figure 2 (JP0)

    10.17182/hepdata.105278.v1/t3

    The upper panel shows the jet yield vs detector jet pT in data and simulation for each of the three...

  • Figure 2 (JP1)

    Data from Figure 2 (JP1)

    10.17182/hepdata.105278.v1/t4

    The upper panel shows the jet yield vs detector jet pT in data and simulation for each of the three...

  • Figure 2 (JP2)

    Data from Figure 2 (JP2)

    10.17182/hepdata.105278.v1/t5

    The upper panel shows the jet yield vs detector jet pT in data and simulation for each of the three...

  • Figure 3 (data, 8.0 GeV/c)

    Data from Figure 3

    10.17182/hepdata.105278.v1/t6

    Distributions of the charged hadrons within the jets as a function of the hadron longitudinal momentum fraction,z, for two typical...

  • Figure 3

    Data from Figure 3

    10.17182/hepdata.105278.v1/t7

    Distributions of the charged hadrons within the jets as a function of the hadron longitudinal momentum fraction,z, for two typical...

  • Figure 4 (data, 8GeV/c)

    Data from Figure 4 (data, 8GeV/c)

    10.17182/hepdata.105278.v1/t8

    Distributions of the charged hadrons within the jets as a function of the hadron longitudinal momentum transverse to the thrust...

  • Figure 4 (simulation, 8GeV/c)

    Data from Figure 4 (simulation, 8GeV/c)

    10.17182/hepdata.105278.v1/t9

    Distributions of the charged hadrons within the jets as a function of the hadron longitudinal momentum transverse to the thrust...

  • Figure 4 (data, 34.4GeV/c)

    Data from Figure 4 (data, 34.4GeV/c)

    10.17182/hepdata.105278.v1/t10

    Distributions of the charged hadrons within the jets as a function of the hadron longitudinal momentum transverse to the thrust...

  • Figure 4 (simulation, 34.4GeV/c)

    Data from Figure 4 (simulation, 34.4GeV/c)

    10.17182/hepdata.105278.v1/t11

    Distributions of the charged hadrons within the jets as a function of the hadron longitudinal momentum transverse to the thrust...

  • Figure 5 (JP0, 34.4GeV/c)

    Data from Figure 5 (JP0, 34.4GeV/c)

    10.17182/hepdata.105278.v1/t12

    The upper panel shows the electromagnetic fraction distribution for jets in a low-pT bin. The lower panel shows the electromagnetic...

  • Figure 5

    Data from Figure 5

    10.17182/hepdata.105278.v1/t13

    The upper panel shows the electromagnetic fraction distribution for jets in a low-pT bin. The lower panel shows the electromagnetic...

  • Figure 6 (JP0)

    Data from Figure 6 (JP0)

    10.17182/hepdata.105278.v1/t14

    Dijet yield vs invariant mass as measured at the detector level. (JP0)

  • Figure 6 (JP1)

    Data from Figure 6 (JP1)

    10.17182/hepdata.105278.v1/t15

    Dijet yield vs invariant mass as measured at the detector level. (JP1)

  • Figure 6 (JP2)

    Data from Figure 6 (JP2)

    10.17182/hepdata.105278.v1/t16

    Dijet yield vs invariant mass as measured at the detector level. (JP2)

  • Figure 7 (a)

    Data from Figure 7 (a)

    10.17182/hepdata.105278.v1/t17

    Dijet opening angle Delta phi distribution

  • Figure 7 (b)

    Data from Figure 7 (b)

    10.17182/hepdata.105278.v1/t18

    Dijet opening angle Delta eta distribution

  • Figure 8 (data and simulation distribution)

    Data from Figure 8 (data and simulation distribution)

    10.17182/hepdata.105278.v1/t19

    Distributions of the charged hadrons within the offaxis cones as a function of hadron pT

  • Figure 8 (the ratio of simulation and data)

    Data from Figure 8 (the ratio of simulation and data)

    10.17182/hepdata.105278.v1/t20

    The ratio of simulation to data for pT < 2 GeV/c

  • Figure 9 (a)

    Data from Figure 9 (a)

    10.17182/hepdata.105278.v1/t21

    the mean underlying event correction to the jet transverse momentum, as a function of detector jet pT

  • Figure 9 (b, data)

    Data from Figure 9 (b, data)

    10.17182/hepdata.105278.v1/t22

    the mean underlying event correction to the dijet mass, as a function of detector dijet invariant mass, from data

  • Figure 9 (b, simulation)

    Data from Figure 9 (b, simulation)

    10.17182/hepdata.105278.v1/t23

    the mean underlying event correction to the dijet mass, as a function of detector dijet invariant mass, from simulation

  • Figure 10

    Data from Figure 10

    10.17182/hepdata.105278.v1/t24

    the observed longitudinal double-spin asymmetry of the underlying event contributions, as a function of detector jet pT

  • Figure 11 (triggered detector jets, 8.0 GeV/c)

    Data from Figure 11 (triggered detector jets, 8.0 GeV/c)

    10.17182/hepdata.105278.v1/t25

    the sampled gluon x distributions, weighted by the partonic asymmetry (triggered detector jets, 8.0 GeV/c)

  • Figure 11 (triggered detector jets, 34.4 GeV/c)

    Data from Figure 11 (triggered detector jets, 34.4 GeV/c)

    10.17182/hepdata.105278.v1/t26

    the sampled gluon x distributions, weighted by the partonic asymmetry (triggered detector jets, 34.4 GeV/c)

  • Figure 11 (all parton jets, 8.0 GeV/c)

    Data from Figure 11 (all parton jets, 8.0 GeV/c)

    10.17182/hepdata.105278.v1/t27

    the sampled gluon x distributions, weighted by the partonic asymmetry (all parton jets, 8.0 GeV/c)

  • Figure 11 (all parton jets, 34.4 GeV/c)

    Data from Figure 11 (all parton jets, 34.4 GeV/c)

    10.17182/hepdata.105278.v1/t28

    the sampled gluon x distributions, weighted by the partonic asymmetry (all parton jets, 34.4 GeV/c)

  • Figure 12 (Run12)

    Data from Figure 12 (Run12)

    10.17182/hepdata.105278.v1/t29

    the inclusive jet asymmetries and systematic uncertainties,as function of pT compared to the theoretical predictions (Run12)

  • Figure 12 (DSSV14)

    Data from Figure 12 (DSSV14)

    10.17182/hepdata.105278.v1/t30

    the inclusive jet asymmetries and systematic uncertainties,as function of pT compared to the theoretical predictions (DSSV14)

  • Figure 12 (NNPDFpol.1)

    Data from Figure 12 (NNPDFpol.1)

    10.17182/hepdata.105278.v1/t31

    the inclusive jet asymmetries and systematic uncertainties,as function of pT compared to the theoretical predictions (NNPDFpol.1)

  • Figure 12 (NNPDFpol.1 -rep)

    Data from Figure 12 (NNPDFpol.1 -rep)

    10.17182/hepdata.105278.v1/t32

    the inclusive jet asymmetries and systematic uncertainties,as function of pT compared to the theoretical predictions (NNPDFpol.1 -rep)

  • Figure 13 (Run12)

    Data from Figure 13 (Run12)

    10.17182/hepdata.105278.v1/t33

    the inclusive jet asymmetries and systematic uncertainties, as function of xT compared to the theoretical predictions (Run12)

  • Figure 13 (Run9)

    Data from Figure 13 (Run9)

    10.17182/hepdata.105278.v1/t34

    the inclusive jet asymmetries and systematic uncertainties, as function of xT compared to the theoretical predictions (Run9)

  • Figure 13 (DSSV14)

    Data from Figure 13 (DSSV14)

    10.17182/hepdata.105278.v1/t35

    the inclusive jet asymmetries and systematic uncertainties, as function of xT compared to the theoretical predictions (DSSV14)

  • Figure 13 (NNPDFpol1.1)

    Data from Figure 13 (NNPDFpol1.1)

    10.17182/hepdata.105278.v1/t36

    the inclusive jet asymmetries and systematic uncertainties, as function of xT compared to the theoretical predictions (NNPDFpol1.1)

  • Figure 14 (a,A,x1)

    Data from Figure 14 (a,A,x1)

    10.17182/hepdata.105278.v1/t37

    Leading order extractions from the embedding sample of the x1 and x2 distributions in dijet events for topological bins A-D...

  • Figure 14 (a,A,x2)

    Data from Figure 14 (a,A,x2)

    10.17182/hepdata.105278.v1/t38

    Leading order extractions from the embedding sample of the x1 and x2 distributions in dijet events for topological bins A-D...

  • Figure 14 (a,B,x1)

    Data from Figure 14 (a,B,x1)

    10.17182/hepdata.105278.v1/t39

    Leading order extractions from the embedding sample of the x1 and x2 distributions in dijet events for topological bins A-D...

  • Figure 14 (a,B,x2)

    Data from Figure 14 (a,B,x2)

    10.17182/hepdata.105278.v1/t40

    Leading order extractions from the embedding sample of the x1 and x2 distributions in dijet events for topological bins A-D...

  • Figure 14 (a,C,x1)

    Data from Figure 14 (a,C,x1)

    10.17182/hepdata.105278.v1/t41

    Leading order extractions from the embedding sample of the x1 and x2 distributions in dijet events for topological bins A-D...

  • Figure 14 (a,C,x2)

    Data from Figure 14 (a,C,x2)

    10.17182/hepdata.105278.v1/t42

    Leading order extractions from the embedding sample of the x1 and x2 distributions in dijet events for topological bins A-D...

  • Figure 14 (a,D,x1)

    Data from Figure 14 (a,D,x1)

    10.17182/hepdata.105278.v1/t43

    Leading order extractions from the embedding sample of the x1 and x2 distributions in dijet events for topological bins A-D...

  • Figure 14 (a,D,x2)

    Data from Figure 14 (a,D,x2)

    10.17182/hepdata.105278.v1/t44

    Leading order extractions from the embedding sample of the x1 and x2 distributions in dijet events for topological bins A-D...

  • Figure 14 (b,A,DSSV14)

    Data from Figure 14 (b,A,DSSV14)

    10.17182/hepdata.105278.v1/t45

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,A,DSSV14)

  • Figure 14 (b,B,DSSV14)

    Data from Figure 14 (b,B,DSSV14)

    10.17182/hepdata.105278.v1/t46

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,B,DSSV14)

  • Figure 14 (b,C,DSSV14)

    Data from Figure 14 (b,C,DSSV14)

    10.17182/hepdata.105278.v1/t47

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,C,DSSV14)

  • Figure 14 (b,D,DSSV14)

    Data from Figure 14 (b,D,DSSV14)

    10.17182/hepdata.105278.v1/t48

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,D,DSSV14)

  • Figure 14 (b,A,NNPDF11)

    Data from Figure 14 (b,A,NNPDF11)

    10.17182/hepdata.105278.v1/t49

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,A,NNPDF11)

  • Figure 14 (b,B,NNPDF11)

    Data from Figure 14 (b,B,NNPDF11)

    10.17182/hepdata.105278.v1/t50

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,B,NNPDF11)

  • Figure 14 (b,C,NNPDF11)

    Data from Figure 14 (b,C,NNPDF11)

    10.17182/hepdata.105278.v1/t51

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,C,NNPDF11)

  • Figure 14 (b,D,NNPDF11)

    Data from Figure 14 (b,D,NNPDF11)

    10.17182/hepdata.105278.v1/t52

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,D,NNPDF11)

  • Figure 14 (b,A,data)

    Data from Figure 14 (b,A,data)

    10.17182/hepdata.105278.v1/t53

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,A,data)

  • Figure 14 (b,B,data)

    Data from Figure 14 (b,B,data)

    10.17182/hepdata.105278.v1/t54

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,B,data)

  • Figure 14 (b,C,data)

    Data from Figure 14 (b,C,data)

    10.17182/hepdata.105278.v1/t55

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,C,data)

  • Figure 14 (b,D,data)

    Data from Figure 14 (b,D,data)

    10.17182/hepdata.105278.v1/t56

    Dijet asymmetries for the same topological bins in 510 GeV pp collisions (b,D,data)

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