Drell-Yan forward-backward and spin asymmetries for arbitrary vector boson production at next-to-leading order

Kamal, B.

doi:10.1103/physrevd.57.6663

Cited by 29 publications

(31 citation statements)

References 58 publications

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“…24 at √ s = 350GeV and 500GeV. The asymmetries decrease for increasing energy and we recall that higher-order corrections have very small effects on these predictions [47]. The general trend of A P V L (W ) can be easily understood and, for example at…”

Section: Helicity Asymmetries For Weak Boson Production At Rhic-bnlmentioning

confidence: 92%

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A statistical approach for polarized parton distributions

2002

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A global next-to-leading order QCD analysis of unpolarized and polarized deepinelastic scattering data is performed with parton distributions constructed in a statistical physical picture of the nucleon. The chiral properties of QCD lead to strong relations between quarks and antiquarks distributions and the importance of the Pauli exclusion principle is also emphasized. We obtain a good description, in a broad range of x and Q 2 , of all measured structure functions in terms of very few free parameters.We stress the fact that at RHIC-BNL the ratio of the unpolarized cross sections for the production of W + and W − in pp collisions, will directly probe the behavior of the d(x)/u(x) ratio for x ≥ 0.2, a definite and important test for the statistical model. Finally, we give specific predictions for various helicity asymmetries for the W ± , Z production in pp collisions at high energies, which will be measured with forthcoming experiments at RHIC-BNL and are sensitive tests of the statistical model for ∆u (x) and ∆d(x).

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Section: Helicity Asymmetries For Weak Boson Production At Rhic-bnlmentioning

confidence: 92%

“…We thank T. Gehrmann for providing us his code used in Ref. [47] for NLO Q 2 evolution of the helicity asymmetries. We also thank Z.-E. Meziani, N.Saito, A.W.…”

Section: Acknowledgmentsmentioning

confidence: 99%

A statistical approach for polarized parton distributions

2002

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“…where now the subscripts +, − denote the longitudinal polarization of nucleon 1; the polarization of nucleon 2 is averaged over. In QCD in leading-log approximation one has [10,15] [16] for a more detailed discussion.…”

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confidence: 99%

Polarized antiquark flavor asymmetry in Drell–Yan pair production

et al. 2001

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We investigate the role of the flavor asymmetry of the nucleon's polarized antiquark distributions in Drell-Yan lepton pair production in polarized nucleon-nucleon collisions at HERA (fixed-target) and RHIC energies. It is shown that the large polarized antiquark flavor asymmetry predicted by model calculations in the large-N c limit (chiral quark-soliton model) has a dramatic effect on the double spin asymmetries in high mass lepton pair production, as well as on the single spin asymmetries in lepton pair production through W ± -bosons at M 2 = M 2 W .

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“…For the unpolarized and the single-longitudinal spin cases, the cross sections for these have been given and studied in Refs. [18][19][20][21][22][23][24][25][26], respectively. In the present paper, we will improve the theoretical framework by going beyond NLO and performing a resummation of certain logarithmically enhanced terms in the partonic cross sections to all orders in perturbation theory.…”

Section: Introductionmentioning

confidence: 99%

Threshold resummation forW-boson production at BNL RHIC

Mukherjee

Vogelsang

2006

Phys. Rev. D

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We study the resummation of large logarithmic perturbative corrections to the partonic cross sections relevant for the process pp ! W X at the BNL Relativistic Heavy Ion Collider (RHIC). At RHIC, polarized protons are available, and spin asymmetries for this process will be used for precise measurements of the up and down quark and antiquark distributions in the proton. The corrections arise near the threshold for the partonic reaction and are associated with soft-gluon emission. We perform the resummation to next-to-leading logarithmic accuracy, for the rapidity-differential cross section. We find that resummation leads to relatively moderate effects on the cross sections and spin asymmetries.

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Drell-Yan forward-backward and spin asymmetries for arbitrary vector boson production at next-to-leading order

Cited by 29 publications

References 58 publications

A statistical approach for polarized parton distributions

A statistical approach for polarized parton distributions

Polarized antiquark flavor asymmetry in Drell–Yan pair production

Threshold resummation forW-boson production at BNL RHIC

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