Charged-Pion cross sections and double-helicity asymmetries in polarized p+p collisions at √s = 200 GeV
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
January 1, 2015
We present midrapidity charged-pion invariant cross sections, the ratio of the π- to π+ cross sections and the charge-separated double-spin asymmetries in polarized p + p collisions at p√s = 200 GeV. While the cross section measurements are consistent within the errors of next-to-leading-order (NLO) perturbative quantum chromodynamics predictions (pQCD), the same calculations overestimate the ratio of the charged-pion cross sections. This discrepancy arises from the cancellation of the substantial systematic errors associated with the NLO-pQCD predictions in the ratio and highlights the constraints these data will place on flavor-dependent pion fragmentation functions. The charge-separated pion asymmetries presented here sample an x range of ~0.03-0.16 and provide unique information on the sign of the gluon-helicity distribution.
Duke Scholars
Published In
Physical Review D Particles Fields Gravitation and Cosmology
DOI
EISSN
1550-2368
ISSN
1550-7998
Publication Date
January 1, 2015
Volume
91
Issue
3
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
Citation
APA
Chicago
ICMJE
MLA
NLM
Adare, A., Aidala, C., Ajitanand, N. N., Akiba, Y., Akimoto, R., Al-Ta’ani, H., … Grau, N. (2015). Charged-Pion cross sections and double-helicity asymmetries in polarized p+p collisions at √s = 200 GeV. Physical Review D Particles Fields Gravitation and Cosmology, 91(3). https://doi.org/10.1103/PhysRevD.91.032001
Adare, A., C. Aidala, N. N. Ajitanand, Y. Akiba, R. Akimoto, H. Al-Ta’ani, J. Alexander, et al. “Charged-Pion cross sections and double-helicity asymmetries in polarized p+p collisions at √s = 200 GeV.” Physical Review D Particles Fields Gravitation and Cosmology 91, no. 3 (January 1, 2015). https://doi.org/10.1103/PhysRevD.91.032001.
Adare A, Aidala C, Ajitanand NN, Akiba Y, Akimoto R, Al-Ta’ani H, et al. Charged-Pion cross sections and double-helicity asymmetries in polarized p+p collisions at √s = 200 GeV. Physical Review D Particles Fields Gravitation and Cosmology. 2015 Jan 1;91(3).
Adare, A., et al. “Charged-Pion cross sections and double-helicity asymmetries in polarized p+p collisions at √s = 200 GeV.” Physical Review D Particles Fields Gravitation and Cosmology, vol. 91, no. 3, Jan. 2015. Scopus, doi:10.1103/PhysRevD.91.032001.
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, Atomssa ET, 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, Conesadelvalle Z, Connors M, Csanád M, Csörgő 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, Decassagnac RG, Grau N. Charged-Pion cross sections and double-helicity asymmetries in polarized p+p collisions at √s = 200 GeV. Physical Review D Particles Fields Gravitation and Cosmology. 2015 Jan 1;91(3).
Published In
Physical Review D Particles Fields Gravitation and Cosmology
DOI
EISSN
1550-2368
ISSN
1550-7998
Publication Date
January 1, 2015
Volume
91
Issue
3
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