Forward production of charm states and prompt single muons in 278 GeV π− Fe interactions

doi:10.1016/0370-2693(84)91903-8

Physics Letters B

Volume 138, Issues 1–3, 12 April 1984, Pages 213-218

https://doi.org/10.1016/0370-2693(84)91903-8 Get rights and content

Abstract

The forward production of charm states in 278 GeV π⁻ Fe interactions has been studied via the production of prompt single muons with momentum ≳ 20 GeV/c. The production of prompt 1u⁻ is significantly larger than the production of prompt 1u⁺ events. For x_D ≳ 0.2 the data indicate that on the average D mesons are produced with a (1−x)² distribution. The experimental distributions are compared with various charm production models. A fit to a model incorporating both central and forward production yields a production cross section of 17.5_−3.9^+5.4 μb/nucleon (x >fx 0), assuming a linear A dependence and an 8% average semileptonic branching ratio.

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We review the hadro-production data presently available on open charm and beauty absolute production cross-sections, collected by experiments at CERN, DESY and Fermilab. The published charm production cross-section values are updated, in particular for the “time evolution” of the branching ratios. These measurements are compared to LO pQCD calculations, as a function of the collision energy, using recent parameterisations of the parton distribution functions. We then estimate, including nuclear effects on the parton densities, the charm and beauty production cross-sections relevant for measurements at SPS and RHIC energies, in proton–proton, proton–nucleus and nucleus–nucleus collisions. The calculations are also compared with measurements of single D and B kinematical distributions, and $D \bar{D}$ pair correlations. We finish with two brief comments, concerning the importance of beauty production as a feed-down source of $J / ψ$ production, and open charm measurements performed using leptonic decays.
The structure of the nucleon, three decades of investigation (1967-2004)
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^☆: Work supported by the US Department of Energy and the National Science Foundation.

¹: Present address: Rockefeller University, New York, NY 10021, USA.

²: Present address: Fermilab, Batavia, IL 60510, USA.

³: Present address: SLAC, Stanford, CA 94305, USA.

⁴: Present address: Columbia University, New York, NY 10027, USA.

⁵: Present address: NYCB Real-Time Computing Inc., 47B Dunwood Road, Port Washington, NY 11050, USA.

⁶: Present address: Laboratory for High Energy Physics, Tsukuga-gun, Oho-Machi, Ibaraki-Ken 305, Japan.

⁷: Present address: Watkins-Johnson Corp. 2525 N. First St., San Jose, CA 95131-1097, USA.

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Physics Letters B

Abstract

References (10)

Phys. Lett.

Phys. Lett.

A model of hadronic charm production

UM HE 82-20

Phys. Lett.

Nucl. Phys.

Fermilab TM-805

CERN 80-07

Ph.D. Thesis

Cited by (17)

Heavy-flavour hadro-production from fixed-target to collider energies

The structure of the nucleon, three decades of investigation (1967-2004)

Asymmetries between the production of D<sup>-</sup><inf>s</inf> and D<sup>+</sup><inf>s</inf> mesons from 500 GeV/c π<sup>-</sup> nucleon interaction as functions of x<inf>F</inf> and p<sup>2</sup><inf>t</inf>

Asymmetries between the production of D<sup>+</sup> and D<sup>-</sup> mesons from 500 GeV/c π<sup>-</sup>-nucleus interactions as a function of x<inf>f</inf> and p<sup>2</sup><inf>t</inf>

Study of D<sup>+</sup> and D<sup>-</sup> Feynman's x distributions in π<sup>-</sup>-nucleus interactions at the SPS

A-dependence of the charm production cross section in 300 GeV/c proton interactions

Forward production of charm states and prompt single muons in 278 GeV π− Fe interactions☆

Abstract

Phys. Lett.

Phys. Lett.

UM HE 82-20

Phys. Lett.

Nucl. Phys.

Fermilab TM-805

CERN 80-07

Ph.D. Thesis

Forward production of charm states and prompt single muons in 278 GeV π⁻ Fe interactions☆