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Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in p → + p → collisions at s =200GeV

Publication ,  Journal Article
Adare, A; Aidala, C; Ajitanand, NN; Akiba, Y; Akimoto, R; Al-Ta'Ani, H; Alexander, J; Andrews, KR; Angerami, A; Aoki, K; Apadula, N; Appelt, E ...
Published in: Physical Review D - Particles, Fields, Gravitation and Cosmology
July 17, 2014

Results are presented from data recorded in 2009 by the PHENIX experiment at the Relativistic Heavy Ion Collider for the double-longitudinal spin asymmetry, ALL, for π0 and η production in s=200GeV polarized p+p collisions. Comparison of the π0 results with different theory expectations based on fits of other published data showed a preference for small positive values of gluon polarization, ΔG, in the proton in the probed Bjorken x range. The effect of adding the new 2009 π0 data to a recent global analysis of polarized scattering data is also shown, resulting in a best fit value ΔGDSSV[0.05,0.2]=0.06-0.15+0.11 in the range 0.05

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Published In

Physical Review D - Particles, Fields, Gravitation and Cosmology

DOI

EISSN

1550-2368

ISSN

1550-7998

Publication Date

July 17, 2014

Volume

90

Issue

1

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

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Adare, A., Aidala, C., Ajitanand, N. N., Akiba, Y., Akimoto, R., Al-Ta’Ani, H., … Greene, S. V. (2014). Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in p → + p → collisions at s =200GeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 90(1). https://doi.org/10.1103/PhysRevD.90.012007
Adare, A., C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, H. Al-Ta’Ani, J. Alexander, et al. “Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in p → + p → collisions at s =200GeV.” Physical Review D - Particles, Fields, Gravitation and Cosmology 90, no. 1 (July 17, 2014). https://doi.org/10.1103/PhysRevD.90.012007.
Adare A, Aidala C, Ajitanand NN, Akiba Y, Akimoto R, Al-Ta’Ani H, et al. Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in p → + p → collisions at s =200GeV. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2014 Jul 17;90(1).
Adare, A., et al. “Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in p → + p → collisions at s =200GeV.” Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 90, no. 1, July 2014. Scopus, doi:10.1103/PhysRevD.90.012007.
Adare A, Aidala C, Ajitanand NN, Akiba Y, Akimoto R, Al-Ta’Ani H, Alexander J, Andrews KR, Angerami A, Aoki K, Apadula N, Appelt E, Aramaki Y, Armendariz R, Aschenauer EC, Awes TC, Azmoun B, Babintsev V, Bai M, Bannier B, Barish KN, Bassalleck B, Basye AT, Bathe S, Baublis V, Baumann C, Bazilevsky A, Belmont R, Ben-Benjamin J, Bennett R, Blau DS, Bok JS, Boyle K, Brooks ML, Broxmeyer D, Buesching H, Bumazhnov V, Bunce G, Butsyk S, Campbell S, Castera P, Chen CH, Chi CY, Chiu M, Choi IJ, Choi JB, Choudhury RK, Christiansen P, Chujo T, Chvala O, Cianciolo V, Citron Z, Cole BA, Conesa Del Valle Z, Connors M, Csanád M, Csörgo T, Dairaku S, Datta A, David G, Dayananda MK, Denisov A, Deshpande A, Desmond EJ, Dharmawardane KV, Dietzsch O, Dion A, Donadelli M, Drapier O, Drees A, Drees KA, Durham JM, Durum A, D’Orazio L, Efremenko YV, Engelmore T, Enokizono A, En’Yo H, Esumi S, Fadem B, Fields DE, Finger M, Fleuret F, Fokin SL, Frantz JE, Franz A, Frawley AD, Fukao Y, Fusayasu T, Gal C, Garishvili I, Giordano F, Glenn A, Gong X, Gonin M, Goto Y, Granier De Cassagnac R, Grau N, Greene SV. Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in p → + p → collisions at s =200GeV. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2014 Jul 17;90(1).

Published In

Physical Review D - Particles, Fields, Gravitation and Cosmology

DOI

EISSN

1550-2368

ISSN

1550-7998

Publication Date

July 17, 2014

Volume

90

Issue

1

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences