Aspects of heavy quark production in polarized proton-proton collisions

M. Karliner; R. W. Robinett

doi:10.1016/0370-2693(94)90409-X

Aspects of heavy quark production in polarized proton-proton collisions

M. Karliner^*, R. W. Robinett

^*Corresponding author for this work

School of Physics and Astronomy

Pennsylvania State University

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We examine the spin-dependence of b-quark production at large p_T in polarized pp collisions. The leading-order (LO) 2 → 2 subprocesses, g + g → Q + Q and q + q → Q + Q have a large 'analyzing power', with the average spin-spin asymmetry approaching -100% at large p_T. Next-to-leading order (NLO) 2 → 3 processes have a large and positive asymmetry at large p_T, leading to strong cancellations with the LO predictions. The results suggest that b-quark production might constitute an interesting test of the spin-dependence of NLO QCD but they also point up the need for the complete O(α³_S spin-dependent corrections for extraction of the polarized gluon distribution.

Original language	English
Pages (from-to)	209-216
Number of pages	8
Journal	Physics Letters B
Volume	324
Issue number	2
DOIs	https://doi.org/10.1016/0370-2693(94)90409-X
State	Published - 31 Mar 1994

Funding

Funders	Funder number
National Science Foundation	PHY-9001744, 90-00342
Directorate for Mathematical and Physical Sciences	9001744
United States-Israel Binational Science Foundation
Israel Academy of Sciences and Humanities

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title = "Aspects of heavy quark production in polarized proton-proton collisions",

abstract = "We examine the spin-dependence of b-quark production at large pT in polarized pp collisions. The leading-order (LO) 2 → 2 subprocesses, g + g → Q + Q and q + q → Q + Q have a large 'analyzing power', with the average spin-spin asymmetry approaching -100% at large pT. Next-to-leading order (NLO) 2 → 3 processes have a large and positive asymmetry at large pT, leading to strong cancellations with the LO predictions. The results suggest that b-quark production might constitute an interesting test of the spin-dependence of NLO QCD but they also point up the need for the complete O(α3S spin-dependent corrections for extraction of the polarized gluon distribution.",

author = "M. Karliner and Robinett, {R. W.}",

note = "Funding Information: We thank J.D. Bjorken for emphasizing the importance of this process. This work was supportedi n part by the National Science Foundation under Grant No. PHY-9001744 (R.R.) . The researcho f M.K. was supported in part by grant No. 90-00342 from the United States-Israel Binational Science Foundation (BSF) , Jerusalem, Israel, and by the Basic ResearchF oundation administeredb y the Israel Academy of Sciences and Humanities.",

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doi = "10.1016/0370-2693(94)90409-X",

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AU - Karliner, M.

AU - Robinett, R. W.

N1 - Funding Information: We thank J.D. Bjorken for emphasizing the importance of this process. This work was supportedi n part by the National Science Foundation under Grant No. PHY-9001744 (R.R.) . The researcho f M.K. was supported in part by grant No. 90-00342 from the United States-Israel Binational Science Foundation (BSF) , Jerusalem, Israel, and by the Basic ResearchF oundation administeredb y the Israel Academy of Sciences and Humanities.

PY - 1994/3/31

Y1 - 1994/3/31

N2 - We examine the spin-dependence of b-quark production at large pT in polarized pp collisions. The leading-order (LO) 2 → 2 subprocesses, g + g → Q + Q and q + q → Q + Q have a large 'analyzing power', with the average spin-spin asymmetry approaching -100% at large pT. Next-to-leading order (NLO) 2 → 3 processes have a large and positive asymmetry at large pT, leading to strong cancellations with the LO predictions. The results suggest that b-quark production might constitute an interesting test of the spin-dependence of NLO QCD but they also point up the need for the complete O(α3S spin-dependent corrections for extraction of the polarized gluon distribution.

AB - We examine the spin-dependence of b-quark production at large pT in polarized pp collisions. The leading-order (LO) 2 → 2 subprocesses, g + g → Q + Q and q + q → Q + Q have a large 'analyzing power', with the average spin-spin asymmetry approaching -100% at large pT. Next-to-leading order (NLO) 2 → 3 processes have a large and positive asymmetry at large pT, leading to strong cancellations with the LO predictions. The results suggest that b-quark production might constitute an interesting test of the spin-dependence of NLO QCD but they also point up the need for the complete O(α3S spin-dependent corrections for extraction of the polarized gluon distribution.

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Aspects of heavy quark production in polarized proton-proton collisions

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