Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at √ s = 200 and 62.4 GeV (2013)
- Authors:
- USP affiliated authors: DIETZSCH, OLACIO - IF ; LEITE, MARCO AURELIO LISBOA - IF ; TAKAGUI, EMI MARCIA - IF
- Unidade: IF
- Assunto: COLISÕES DE ÍONS PESADOS RELATIVÍSTICOS
- Language: Inglês
- Abstract: Measurements of transverse-single-spin asymmetries (AN) in p+p collisions at √ s = 62.4 and 200 GeV with the PHENIX detector at RHIC are presented. At midrapidity, AN is measured for neutral pion and eta mesons reconstructed from diphoton decay, and, at forward rapidities, neutral pions are measured using both diphotons and electromagnetic clusters. The neutral-pion measurement of AN at midrapidity is consistent with zero with uncertainties a factor of 20 smaller than previous publications, which will lead to improved constraints on the gluon Sivers function. At higher rapidities, where the valence quark distributions are probed, the data exhibit sizable asymmetries. In comparison with previous measurements in this kinematic region, the new data extend the kinematic coverage in √ s and pT , and it is found that the asymmetries depend only weakly on √ s. The origin of the forward AN is presently not understood quantitatively. The extended reach to higher pT probes the transition between transverse momentum dependent effects at low pT and multi-parton dynamics at high pT.
- Imprenta:
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ABNT
ADARE, A et al. Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at √ s = 200 and 62.4 GeV. . São Paulo: Instituto de Física, Universidade de São Paulo. Disponível em: http://lanl.arxiv.org/pdf/1312.1995v1.pdf. Acesso em: 19 set. 2024. , 2013 -
APA
Adare, A., Dietzsch, O., Donadelli, M., Leite, M. A. L., Lenzi, B. R., Silva, C. L. da, & Takagui, E. M. (2013). Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at √ s = 200 and 62.4 GeV. São Paulo: Instituto de Física, Universidade de São Paulo. Recuperado de http://lanl.arxiv.org/pdf/1312.1995v1.pdf -
NLM
Adare A, Dietzsch O, Donadelli M, Leite MAL, Lenzi BR, Silva CL da, Takagui EM. Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at √ s = 200 and 62.4 GeV [Internet]. 2013 ;[citado 2024 set. 19 ] Available from: http://lanl.arxiv.org/pdf/1312.1995v1.pdf -
Vancouver
Adare A, Dietzsch O, Donadelli M, Leite MAL, Lenzi BR, Silva CL da, Takagui EM. Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at √ s = 200 and 62.4 GeV [Internet]. 2013 ;[citado 2024 set. 19 ] Available from: http://lanl.arxiv.org/pdf/1312.1995v1.pdf - Formationofdense partonic matter in relativistic nucleus-nucleus collisions atRHIC: experimental evaluation by the PHENIX collaboration
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