STUDY OF K$sup +$p INELASTIC CHANNELS.

Barish, B.; Davies, D.; Borak, T.B.

doi:10.2172/4118058

Cited by 7 publications

(10 citation statements)

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“…Jets are reconstructed using a midpoint cone clustering algorithm using a cone radius of 0. Taking all current PHENIX [30,31] and STAR A LL measurements together in comparison to different NLO perturbative QCD predictions for A LL yields a consistent picture which rules out a large gluon polarization scenario. The STAR inclusive measurements will benefit enormously from the increased data sample in Run 6, the larger beam polarization and the wider detector acceptance at central rapidity with the completion of the STAR BEMC.…”

Section: Star Longitudinal Spin Program -Recent Resultsmentioning

confidence: 82%

Recent results of the STAR high-energy polarized proton-proton program at RHIC at BNL

Surrow¹

2007

AIP Conference Proceedings

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Abstract. The STAR experiment at the Relativistic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory (BNL) is carrying out a spin physics program colliding transverse or longitudinal polarized proton beams at √ s = 200 − 500 GeV to gain a deeper insight into the spin structure and dynamics of the proton. These studies provide fundamental tests of Quantum Chromodynamics (QCD).One of the main objectives of the STAR spin physics program is the determination of the polarized gluon distribution function through a measurement of the longitudinal double-spin asymmetry, A LL , for various processes. Recent results will be shown on the measurement of A LL for inclusive jet production, neutral pion production and charged pion production at √ s = 200 GeV. In addition to these measurements involving longitudinal polarized proton beams, the STAR collaboration has performed several important measurements employing transverse polarized proton beams. New results on the measurement of the transverse single-spin asymmetry, A N , for forward neutral pion production and the first measurement of A N for mid-rapidity di-jet production will be discussed.

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Section: Star Longitudinal Spin Program -Recent Resultsmentioning

confidence: 82%

Recent results of the STAR high-energy polarized proton-proton program at RHIC at BNL

Surrow¹

2007

AIP Conference Proceedings

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“…Presently, the experiments focus on objects with a small positive charge which is only true for heavy strangelets. Nevertheless, experiments like E864 are also able to detect these highly charged strangelet candidates with their present setup [19].…”

Section: Shell Effects -The Valley Of Stabilitymentioning

confidence: 86%

Strangelets and strange quark matter

Schaffner-Bielich¹

1998

Nuclear Physics A

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“…Looking ahead to the future, upgrade plans for a forward calorimeter and tracking system at STAR are underway [26]; see also the presentation and proceedings by K. Barish [27]. The capability of measuring forward jets and dijets will also probe x down to ∼10 −3 , but will more precisely probe the shape of ∆g(x) in this important region.…”

Section: Forward Rapidity Observablesmentioning

confidence: 99%

Overview of Gluon Helicity Measurements at STAR

Dilks¹

2019

Proceedings of 23rd International Spin Physics Symposium — PoS(SPIN2018)

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The contribution to the spin of the proton from the gluon helicity is starting to come into focus: for gluons carrying a large fraction x of the proton momentum, evidence of positive gluon polarization has been observed, via measurements of the longitudinal double-spin asymmetry A LL for inclusive jet and dijet production. A LL is sensitive to the polarized gluon distribution function, ∆g(x), and while it is positive at high x, it is not well constrained for x < 0.05. Recent measurements at STAR of observables originating dominantly from quark-gluon and gluon-gluon subprocesses aim to improve the precision of ∆g(x) at high x, as well as for the first time provide insight into the low-x contribution. A LL measurements of inclusive jets and dijets at midrapidity (|η| < 1) and intermediate rapidity (0.8 < η < 2) at STAR at √ s = 200 and 510 GeV will be shown, along with the statuses of ongoing analyses; these measurements will help improve the ∆g(x) precision for x 0.01. Recent π 0 A LL measurements in the forward region (2.65 < η < 3.9) at √ s = 510 GeV will also be presented, which probe ∆g(x) down to x∼10 −3 . Comparisons of these results to recent global analyses and extrapolations will be discussed.

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STUDY OF K$sup +$p INELASTIC CHANNELS.

Cited by 7 publications

References 0 publications

Recent results of the STAR high-energy polarized proton-proton program at RHIC at BNL

Recent results of the STAR high-energy polarized proton-proton program at RHIC at BNL

Strangelets and strange quark matter

Overview of Gluon Helicity Measurements at STAR

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