Heavy flavor production with polarized beam and target

Contogouris, A.P.; Papadopoulos, Stavros; Kamal, B.

doi:10.1016/0370-2693(90)90642-j

Cited by 33 publications

(34 citation statements)

References 13 publications

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“…The spin-dependent differential LO subprocess cross sections d∆σ/dt for the resolved processes gg → cc and qq → cc with m c = 0 can again be found in [37].…”

Section: Charm Production At Hera and The Gsimentioning

confidence: 81%

“…In the resolved case, the processes gg → cc and qq → cc contribute; their cross sections have been calculated in [37]. Needless to say that we can obtain the corresponding unpolarized LO charm cross section σ c (S γp ) by using LO unpolarized parton distributions and subprocess cross sections (as calculated in [38]) in (10).…”

Section: Charm Production At Hera and The Gsimentioning

confidence: 99%

“…A sensible way of estimating the contribution to the cross section coming from charm quarks would be to use the (properly symmetrized) matrix elements of [37,38] already employed for Figs. 5,6 in the previous section, which fully take into account the charm mass and threshold effects.…”

Section: Photoproduction Of Jets At Heramentioning

confidence: 99%

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Photoproduction of jets and heavy flavors at future polarized ep -colliders

Stratmann

Vogelsang

1997

Zeitschrift f�r Physik C Particles and Fields

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“…The spin-dependent differential LO subprocess cross sections d∆σ/dt for the resolved processes gg → cc and qq → cc with m c = 0 can again be found in [37].…”

Section: Charm Production At Hera and The Gsimentioning

confidence: 81%

Section: Charm Production At Hera and The Gsimentioning

confidence: 99%

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Photoproduction of jets and heavy flavors at future polarized ep -colliders

Stratmann

Vogelsang

1997

Zeitschrift f�r Physik C Particles and Fields

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“…To eliminate them we introduce two counterterms. In the second case the counterterm involves the Born cross section for q q → QQ, which is proportional to [17]:…”

Section: Subprocess γQ → Qqqmentioning

confidence: 99%

Erratum: Next-to-leading order corrections to heavy flavor production in longitudinally polarized photon-nucleon collisions [Phys. Rev. D62, 114509 (2000)]

Merebashvili¹,

Contogouris²,

Grispos³

2004

Phys. Rev. D

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A complete next-to-leading order calculation of longitudinally polarized heavy quark photoproduction is presented. All results of the purturbative calculation are given in detail. For reactions and energies of interest cross sections differential in the transverse momentum and rapidity of the heavy quark, total cross sections and the corresponding asymmetries are given. Errors in the asymmetries are estimated and the possibility to distinguish between various scerarios of the polarized gluon distribution is discussed. Our results are compared with other related publications.

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“…Examining this factor (28) and our choice for the MS factorization scheme in (38), it is easy to see that the reduced hard gluon cross section can be simply obtained from (29) by setting…”

Section: −1+εmentioning

confidence: 99%

Photoproduction of heavy quarks in next-to-leading order QCD with longitudinally polarized initial states

Bojak

Stratmann

1999

Nuclear Physics B

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We present all relevant details of our calculation of the complete next-to-leading order (O(α 2 s α)) QCD corrections to heavy flavor photoproduction with longitudinally polarized point-like photons and hadrons. In particular we provide analytical results for the virtual plus soft gluon cross section. We carefully address the relevance of remaining theoretical uncertainties by varying, for instance, the factorization and renormalization scales independently. Such studies are of importance for a meaningful first direct determination of the polarized gluon density ∆g from the total charm production spin asymmetry by the upcoming COMPASS experiment. It is shown that the scale uncertainty is considerably reduced in next-to-leading order, but the dependence on the charm quark mass is sizable at fixed target energies. Finally, we study several differential single-inclusive heavy quark distributions and, for the polarized HERA option, the total bottom spin asymmetry.

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Heavy flavor production with polarized beam and target

Cited by 33 publications

References 13 publications

Photoproduction of jets and heavy flavors at future polarized ep -colliders

Photoproduction of jets and heavy flavors at future polarized ep -colliders

Erratum: Next-to-leading order corrections to heavy flavor production in longitudinally polarized photon-nucleon collisions [Phys. Rev. D62, 114509 (2000)]

Photoproduction of heavy quarks in next-to-leading order QCD with longitudinally polarized initial states

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