Aspects of heavy quark production in polarized proton-proton collisions

Research output: Contribution to journalArticle

13 Citations (Scopus)

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(α3 S spin-dependent corrections for extraction of the polarized gluon distribution.

Original languageEnglish (US)
Pages (from-to)209-216
Number of pages8
JournalPhysics Letters B
Volume324
Issue number2
DOIs
StatePublished - Mar 31 1994

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quarks
collisions
protons
asymmetry
cancellation
quantum chromodynamics
predictions

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

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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(α3 S spin-dependent corrections for extraction of the polarized gluon distribution.",
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Aspects of heavy quark production in polarized proton-proton collisions. / Karliner, M.; Robinett, Richard Wallace.

In: Physics Letters B, Vol. 324, No. 2, 31.03.1994, p. 209-216.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Aspects of heavy quark production in polarized proton-proton collisions

AU - Karliner, M.

AU - Robinett, Richard Wallace

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(α3 S 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(α3 S spin-dependent corrections for extraction of the polarized gluon distribution.

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