Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized p+p collisions at s=200GeV
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چکیده
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized p þ p collisions at ffiffi ffi s p ¼ 200 GeV We report STAR measurements of the longitudinal double-spin asymmetry A LL , the transverse single-spin asymmetry A N , and the transverse double-spin asymmetries A AE and A TT for inclusive jet production at mid-rapidity in polarized p þ p collisions at a center-of-mass energy of ffiffi ffi s p ¼ 200 GeV. The data represent integrated luminosities of 7:6 pb À1 with longitudinal polarization and 1:8 pb À1 with transverse L. ADAMCZYK et al. polarization, with 50%–55% beam polarization, and were recorded in 2005 and 2006. No evidence is found for the existence of statistically significant jet A N , A AE , or A TT at mid-rapidity. Recent model calculations indicate the A N results may provide new limits on the gluon Sivers distribution in the proton. The asymmetry A LL significantly improves the knowledge of gluon polarization in the nucleon.
منابع مشابه
Constraints on ∆G through Longitudinal Double Spin Asymmetry Measurements of Inclusive Jet Production in Polarized p+p Collisions at 200 GeV
We report measurements of the longitudinal double spin asymmetry for inclusive jet production using polarized p+p collisions at √ s = 200 GeV at RHIC. Results from the 2005 and 2006 runs are presented. These results set substantial new constraints on the polarized gluon distribution in the proton over the kinematic range 0.02 < x < 0.3, when compared to next-to-leading order global analyses of ...
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