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Improved measurement of double helicity asymmetry in inclulsive midrapidity pi(0) production for polarized p+p collisions at root s=200 GeV

Adler, SS; Afanasiev, S; Aidala, C; Ajitanand, NN; Akiba, Y; Al-Jamel, A; Alexander, J; Aoki, K; Aphecetche, L and Armendariz, R, et al. (2006) In Physical Review D (Particles, Fields, Gravitation and Cosmology) 73(9).
Abstract
We present an improved measurement of the double helicity asymmetry for pi(0) production in polarized proton-proton scattering at root s=200 GeV employing the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). The improvements to our previous measurement come from two main factors: Inclusion of a new data set from the 2004 RHIC run with higher beam polarizations than the earlier run and a recalibration of the beam polarization measurements for the earlier run, which resulted in reduced uncertainties and increased beam polarizations. The results are compared to a Next to Leading Order (NLO) perturbative Quantum Chromodynamics (pQCD) calculation with a range of polarized gluon distributions.
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Physical Review D (Particles, Fields, Gravitation and Cosmology)
volume
73
issue
9
publisher
American Physical Society
external identifiers
  • wos:000237950900002
  • scopus:33646881501
ISSN
1550-2368
DOI
10.1103/PhysRevD.73.091102
language
English
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8414a013-0814-4f09-b8ed-9a5f1d643799 (old id 407871)
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2007-08-08 13:34:59
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2019-02-20 04:19:24
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  abstract     = {We present an improved measurement of the double helicity asymmetry for pi(0) production in polarized proton-proton scattering at root s=200 GeV employing the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). The improvements to our previous measurement come from two main factors: Inclusion of a new data set from the 2004 RHIC run with higher beam polarizations than the earlier run and a recalibration of the beam polarization measurements for the earlier run, which resulted in reduced uncertainties and increased beam polarizations. The results are compared to a Next to Leading Order (NLO) perturbative Quantum Chromodynamics (pQCD) calculation with a range of polarized gluon distributions.},
  articleno    = {091102},
  author       = {Adler, SS and Afanasiev, S and Aidala, C and Ajitanand, NN and Akiba, Y and Al-Jamel, A and Alexander, J and Aoki, K and Aphecetche, L and Armendariz, R and Aronson, SH and Averbeck, R and Awes, TC and Azmoun, B and Babintsev, V and Baldisseri, A and Barish, KN and Barnes, PD and Bassalleck, B and Bathe, S and Batsouli, S and Baublis, V and Bauer, F and Bazilevsky, A and Belikov, S and Bennett, R and Berdnikov, Y and Bjorndal, MT and Boissevain, JG and Borel, H and Boyle, K and Brooks, ML and Brown, DS and Bruner, N and Bucher, D and Buesching, H and Bumazhnov, V and Bunce, G and Burward-Hoy, JM and Butsyk, S and Camard, X and Campbell, S and Chai, JS and Chand, P and Chang, WC and Chernichenko, S and Chi, CY and Chiba, J and Chiu, M and Choi, IJ and Choudhury, RK and Chujo, T and Cianciolo, V and Cleven, CR and Cobigo, Y and Cole, BA and Comets, MP and Constantin, P and Csanad, M and Csorgo, T and Cussonneau, JP and d'Enterria, D and Dahms, T and Das, K and David, G 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  issn         = {1550-2368},
  language     = {eng},
  number       = {9},
  publisher    = {American Physical Society},
  series       = {Physical Review D (Particles, Fields, Gravitation and Cosmology)},
  title        = {Improved measurement of double helicity asymmetry in inclulsive midrapidity pi(0) production for polarized p+p collisions at root s=200 GeV},
  url          = {http://dx.doi.org/10.1103/PhysRevD.73.091102},
  volume       = {73},
  year         = {2006},
}