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Longitudinal double-spin asymmetry for inclusive jet production in (p)over-right-arrow + (p)over-right-arrow collisions at root s=200 GeV (CROSBI ID 151527)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Abelev, B.I. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; et al. (the STAR Collaboration) Longitudinal double-spin asymmetry for inclusive jet production in (p)over-right-arrow + (p)over-right-arrow collisions at root s=200 GeV // Physical review letters, 100 (2008), 23; 232003-1-232003-7. doi: 10.1103/PhysRevLett.100.232003

Podaci o odgovornosti

Abelev, B.I. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; et al. (the STAR Collaboration)

engleski

Longitudinal double-spin asymmetry for inclusive jet production in (p)over-right-arrow + (p)over-right-arrow collisions at root s=200 GeV

We report a new STAR measurement of the longitudinal double-spin asymmetry A_LL for inclusive jet production at mid-rapidity in polarized p+p collisions at a center-of-mass energy of sqrt(s) = 200 GeV. The data, which cover jet transverse momenta 5 < p_T < 30 GeV/c, are substantially more precise than previous measurements. They provide significant new constraints on the gluon spin contribution to the nucleon spin through the comparison to predictions derived from one global fit of polarized deep-inelastic scattering measurements.

longitudinal double-spin asymmetry; polarized protons; nucleon; photoproduction; pair

Art. no. 232003.

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Podaci o izdanju

100 (23)

2008.

232003-1-232003-7

objavljeno

0031-9007

10.1103/PhysRevLett.100.232003

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Fizika

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