Asanova, M.E.
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One-spin pion asymmetry in the d(pol.) + A --> pi+- + X processes near Theta(pi) = 90-degrees.

Averichev, G.S. ; Agakishiev, G. ; Asanova, M.E. ; et al.
Dubna JINR - 1(69)-95 (95/04,rec.Jul.) 27-36, 1995.
Inspire Record 404986 DOI 10.17182/hepdata.70491

None

1 data table
Table 1

No description provided.


Polarization of J / psi and psi(2S) mesons produced in p anti-p collisions at s**(1/2) = 1.96-TeV

The CDF collaboration Abulencia, A. ; Adelman, Jahred A. ; Affolder, T. ; et al.
Phys.Rev.Lett. 99 (2007) 132001, 2007.
Inspire Record 747876 DOI 10.17182/hepdata.42742

We have measured the polarizations of J/ψ and ψ(2S) mesons as functions of their transverse momentum pT when they are produced promptly in the rapidity range |y|<0.6 with pT≥5  GeV/c. The analysis is performed using a data sample with an integrated luminosity of about 800  pb−1 collected by the CDF II detector. For both vector mesons, we find that the polarizations become increasingly longitudinal as pT increases from 5 to 30  GeV/c. These results are compared to the predictions of nonrelativistic quantum chromodynamics and other contemporary models. The effective polarizations of J/ψ and ψ(2S) mesons from B-hadron decays are also reported.

2 data tables
Table 1

Polarization parameter ALPHA for J/PSI production.

Table 2

Polarization parameter ALPHA for PSI(2S) production.


Observation of polarization in bottomonium production at s**(1/2) = 38.8-GeV

The NuSea collaboration Brown, C.N. ; Awes, T.C. ; Beddo, M.E. ; et al.
Phys.Rev.Lett. 86 (2001) 2529-2532, 2001.
Inspire Record 536629 DOI 10.17182/hepdata.19423

We present a measurement of the polarization observed for bottomonium states produced in p-Cu collisions at sqrt(s)=38.8 GeV. The angular distribution of the decay dimuons of the Upsilon(1S) state show no polarization at small xF and pT but significant positive transverse production polarization for either pT > 1.8 GeV/c or for xF > 0.35. The Upsilon(2S+3S) unresolved states show a large transverse production polarization at all values of xF and pT measured. These observations are compared with an NRQCD calculation that predicts a transverse polarization in bottomonium production arising from quark-antiquark fusion and gluon-gluon fusion diagrams.

6 data tables
Table 1

The observed polarization in the Drell-Yan sideband region as a function of PT. There is an additional systematic uncertainty of 0.02 in the polarization measurements.

Table 2

The observed polarization in the Drell-Yan sideband region as a function of XL. There is an additional systematic uncertainty of 0.02 in the polarization measurements.

Table 3

The observed polarization in the UPSILON(1S) region as a function of PT. There is an additional systematic error of 0.06 in the polarization measurements.

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Polarization of Lambda hyperons in n C and n Pb interactions at initial momenta of 4-GeV/c to 10-GeV/c

Vishnevsky, M.E. ; Vlasova, M.O. ; Galanina, N.D. ; et al.
Phys.Atom.Nucl. 57 (1994) 985-990, 1994.
Inspire Record 383446 DOI 10.17182/hepdata.17186

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.