HEPData

Abstract (data abstract)

CERN-LHC. Measurement of the inclusive J/psi polarization at forward rapidity in pp collisions at sqrt{s} = 8 TeV. Inclusive J/psi polarization parameters is studied in proton-proton collisions at a centre-of-mass energy sqrt{s} = 8 TeV, using the ALICE detector at the CERN LHC. The J/psi mesons are reconstructed, via their decay to a muon pair, in the rapidity interval 2.5 < y < 4.0. The polarization parameters (lambda_theta, lambda_phi and lambda_thetaphi) of inclusive J/psi, as well as an invariant frame quantity, are studied in both helicity and Collins-Soper frames as a function of transverse momentum (p_T) in the interval 2 < p_T < 15 GeV/c. The p_T integrated results are projected in 2-D parameter-space. The measurements exhibit no polarization of inclusive J/psi within experimental uncertainties. In the paper, results are compared to previous measurements at sqrt{s} = 7 TeV from ALICE and LHCb, and also to up-to-date NLO predictions of the Color-Singlet-Model and the NRQCD calculation at sqrt{s} = 8 TeV.

Table 1

Data from Page 8 and 9 of preprint, Fig. 3 and 4, top left plot (black points)

10.17182/hepdata.83784.v1/t1

ALICE inclusive J/psi polarization parameters lambda_theta in the Collins-Soper frame as a function of p_T in pp collisions at sqrt{s}...
https://www.hepdata.net/record/data/283312yaml https://www.hepdata.net/record/data/283312/csvcsv
Table 2

Data from Page 8 and 9 of preprint, Fig. 3 and 4, middle left plot (black points)

10.17182/hepdata.83784.v1/t2

ALICE inclusive J/psi polarization parameters lambda_phi in the Collins-Soper frame as a function of p_T in pp collisions at sqrt{s}...
https://www.hepdata.net/record/data/283313yaml https://www.hepdata.net/record/data/283313/csvcsv
Table 3

Data from Page 8 and 9 of preprint, Fig. 3 and 4, bottom left plot (black points)

10.17182/hepdata.83784.v1/t3

ALICE inclusive J/psi polarization parameters lambda_thetaphi in the Collins-Soper frame as a function of p_T in pp collisions at sqrt{s}...
https://www.hepdata.net/record/data/283314yaml https://www.hepdata.net/record/data/283314/csvcsv
Table 4

Data from Page 8 and 9 of preprint, Fig. 3 and 4, top right plot (black points)

10.17182/hepdata.83784.v1/t4

ALICE inclusive J/psi polarization parameters lambda_theta in the helicity frame as a function of p_T in pp collisions at sqrt{s}...
https://www.hepdata.net/record/data/283315yaml https://www.hepdata.net/record/data/283315/csvcsv
Table 5

Data from Page 8 and 9 of preprint, Fig. 3 and 4, middle right plot (black points)

10.17182/hepdata.83784.v1/t5

ALICE inclusive J/psi polarization parameters lambda_phi in the helicity frame as a function of p_T in pp collisions at sqrt{s}...
https://www.hepdata.net/record/data/283316yaml https://www.hepdata.net/record/data/283316/csvcsv
Table 6

Data from Page 8 and 9 of preprint, Fig. 3 and 4, bottom right plot (black points)

10.17182/hepdata.83784.v1/t6

ALICE inclusive J/psi polarization parameters lambda_thetaphi in the helicity frame as a function of p_T in pp collisions at sqrt{s}...
https://www.hepdata.net/record/data/283317yaml https://www.hepdata.net/record/data/283317/csvcsv
Table 7

Data from Page 10 of preprint, Fig. 5 (red points)

10.17182/hepdata.83784.v1/t7

ALICE inclusive J/psi frame-invariant quantity \widetilde{\lambda} in the Collins-Soper frame as a function of p_T in pp collisions at sqrt{s}...
https://www.hepdata.net/record/data/283318yaml https://www.hepdata.net/record/data/283318/csvcsv
Table 8

Data from Page 10 of preprint, Fig. 5 (green points)

10.17182/hepdata.83784.v1/t8

ALICE inclusive J/psi frame-invariant quantity \widetilde{\lambda} in the helicity frame as a function of p_T in pp collisions at sqrt{s}...
https://www.hepdata.net/record/data/283319yaml https://www.hepdata.net/record/data/283319/csvcsv
Table 9

Data from Page 11 of preprint, Fig.6, top left plot (red contour, full line)

10.17182/hepdata.83784.v1/t9

Contour plot (68% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283320yaml https://www.hepdata.net/record/data/283320/csvcsv
Table 10

Data from Page 11 of preprint, Fig.6, top left plot (red contour, dotted line)

10.17182/hepdata.83784.v1/t10

Contour plot (95% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283321yaml https://www.hepdata.net/record/data/283321/csvcsv
Table 11

Data from Page 11 of preprint, Fig.6, top left plot (green contour, full line)

10.17182/hepdata.83784.v1/t11

Contour plot (68% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283322yaml https://www.hepdata.net/record/data/283322/csvcsv
Table 12

Data from Page 11 of preprint, Fig.6, top left plot (green contour, dotted line)

10.17182/hepdata.83784.v1/t12

Contour plot (95% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283323yaml https://www.hepdata.net/record/data/283323/csvcsv
Table 13

Data from Page 11 of preprint, Fig.6, top right plot (red contour, full line)

10.17182/hepdata.83784.v1/t13

Contour plot (68% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283324yaml https://www.hepdata.net/record/data/283324/csvcsv
Table 14

Data from Page 11 of preprint, Fig.6, top right plot (red contour, dotted line)

10.17182/hepdata.83784.v1/t14

Contour plot (95% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283325yaml https://www.hepdata.net/record/data/283325/csvcsv
Table 15

Data from Page 11 of preprint, Fig.6, top right plot (green contour, full line)

10.17182/hepdata.83784.v1/t15

Contour plot (68% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283326yaml https://www.hepdata.net/record/data/283326/csvcsv
Table 16

Data from Page 11 of preprint, Fig.6, top right plot (green contour, dotted line)

10.17182/hepdata.83784.v1/t16

Contour plot (95% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283327yaml https://www.hepdata.net/record/data/283327/csvcsv
Table 17

Data from Page 11 of preprint, Fig.6, bottom plot (red contour, full line)

10.17182/hepdata.83784.v1/t17

Contour plot (68% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283328yaml https://www.hepdata.net/record/data/283328/csvcsv
Table 18

Data from Page 11 of preprint, Fig.6, bottom plot (red contour, dotted line)

10.17182/hepdata.83784.v1/t18

Contour plot (95% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283329yaml https://www.hepdata.net/record/data/283329/csvcsv
Table 19

Data from Page 11 of preprint, Fig.6, bottom plot (green contour, full line)

10.17182/hepdata.83784.v1/t19

Contour plot (68% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283330yaml https://www.hepdata.net/record/data/283330/csvcsv
Table 20

Data from Page 11 of preprint, Fig.6, bottom plot (green contour, dotted line)

10.17182/hepdata.83784.v1/t20

Contour plot (95% CL) of ALICE inclusive J/psi average pT-integrated (3 < pT < 15 GeV/c in the rapidity interval...
https://www.hepdata.net/record/data/283331yaml https://www.hepdata.net/record/data/283331/csvcsv

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