prikaz prve stranice dokumenta Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at √s=200  GeV
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Scientific paper - Original scientific paper
Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at √s=200  GeV
Physical Review D - Particles, Fields, Gravitation and Cosmology, 89 (2014), 1; 012001. https://doi.org/10.1103/PhysRevD.89.012001
(STAR Collaboration) Adamczyk, L.; ...; Planinić, Mirko; ...; Poljak, Nikola; ...; Zyzak, M.

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Adamczyk, L., Planinić, M., Poljak, N. & Zyzak, M. (2014). Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at √s=200  GeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 89. (1). doi: 10.1103/PhysRevD.89.012001

Adamczyk, L., et al. "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at √s=200  GeV." Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 89, no. 1, 2014. https://doi.org/10.1103/PhysRevD.89.012001

Adamczyk, L., Mirko Planinić, Nikola Poljak and M. Zyzak. "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at √s=200  GeV." Physical Review D - Particles, Fields, Gravitation and Cosmology 89, no. 1 (2014). https://doi.org/10.1103/PhysRevD.89.012001

Adamczyk, L., et al. (2014) 'Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at √s=200  GeV', Physical Review D - Particles, Fields, Gravitation and Cosmology, 89(1). doi: 10.1103/PhysRevD.89.012001

Adamczyk L, Planinić M, Poljak N, Zyzak M. Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at √s=200  GeV. Physical Review D - Particles, Fields, Gravitation and Cosmology [Internet]. 2014 [cited 2024 April 15];89(1). doi: 10.1103/PhysRevD.89.012001

L. Adamczyk, M. Planinić, N. Poljak and M. Zyzak, "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at √s=200  GeV", Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 89, no. 1, 2014. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:940652. [Accessed: 15 April 2024]

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Metadata
Title (english)Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at √s=200  GeV
AuthorL. Adamczyk
Author
...
AuthorMirko Planinić
Author
...
AuthorNikola Poljak
Author
...
AuthorM. Zyzak
CollaborationSTAR Collaboration
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8<η<2.0 in polarized proton-proton collisions at √s=200  GeV are presented. Neutral pions were detected using the end cap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5<pT<16  GeV/c and is found to agree with a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry ALL is measured in the same pseudorapidity range and spans a range of Bjorken-x down to x≈0.01. The measured ALL is consistent with model predictions for varying degrees of gluon polarization. The parity-violating asymmetry AL is also measured and found to be consistent with zero. The transverse single-spin asymmetry AN is measured over a previously unexplored kinematic range in Feynman-x and pT. Such measurements may aid our understanding of the onset and kinematic dependence of the large asymmetries observed at more forward pseudorapidity (η≈3) and their underlying mechanisms. The AN results presented are consistent with a twist-3 model prediction of a small asymmetry over the present kinematic range.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titlePhysical Review D - Particles, Fields, Gravitation and Cosmology
Numberingvol. 89, no. 1, 012001
p-ISSN1550-7998
e-ISSN1550-2368
DOIhttps://doi.org/10.1103/PhysRevD.89.012001
URN:NBNurn:nbn:hr:217:940652
Publication2014
Document URLhttps://journals.aps.org/prd/abstract/10.1103/PhysRevD.89.012001
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public noteCopyright (2014) by the American Physical Society. Received 6 September 2013; published 15 January 2014.
Created on2019-11-29 16:06:00