Characteristics of Charm Production by 400-GeV Protons

M. E. Duffy; G. K. Fanourakis; R. J. Loveless; D. D. Reeder; E. S. Smith; S. Childress; C. Castoldi; G. Conforto; R. C. Ball; C. T. Coffin; H. R. Gustafson; L. W. Jones; M. J. Longo; T. J. Roberts; B. P. Roe; E. Wang; M. B. Crisler; J. S. Hoftun; T. Y. Ling; T. A. Romanowski; J. T. Volk

doi:10.1103/PhysRevLett.57.1522

Characteristics of Charm Production by 400-GeV Protons

M. E. Duffy, G. K. Fanourakis, R. J. Loveless, D. D. Reeder, E. S. Smith, S. Childress, C. Castoldi, G. Conforto, R. C. Ball, C. T. Coffin, H. R. Gustafson, L. W. Jones, M. J. Longo, T. J. Roberts, B. P. Roe, E. Wang, M. B. Crisler, J. S. Hoftun, T. Y. Ling, T. A. Romanowski, and J. T. Volk

Phys. Rev. Lett. 57, 1522 – Published 29 September 1986

Abstract

In a beam-dump experiment at Fermilab the cross section for charm-particle production has been deduced from a measurement of the prompt neutrino flux. The reaction cross section, if we assume only $D \bar{D}$ and the dependence on atomic weight $A^{0.75}$ , is 57.2 ± 2.9 ± 8.5 μb/nucleon and the dependence on Feynman $x$ and transverse momentum is $\frac{E_{D} d^{3} σ}{d p_{D}^{3}} \propto {(1 - x)}^{3.2} e^{- 1.5 p_{⊥}}$ ( $p_{⊥}$ in GeV/c). The data are consistent with as much as 40% diffractive production of $Λ_{c} \bar{D}$ .

Received 28 March 1986

DOI:https://doi.org/10.1103/PhysRevLett.57.1522

Authors & Affiliations

M. E. Duffy^*, G. K. Fanourakis^†, R. J. Loveless, D. D. Reeder, and E. S. Smith^‡

University of Wisconsin, Madison, Wisconsin 53706

S. Childress

Fermilab, Batavia, Illinois 60510

C. Castoldi^§ and G. Conforto

Istituto Nazionale di Fisica Nucleare, Firenze, Italy

R. C. Ball, C. T. Coffin, H. R. Gustafson, L. W. Jones, M. J. Longo, T. J. Roberts^∥, B. P. Roe, and E. Wang^¶

University of Michigan, Ann Arbor, Michigan 48109

M. B. Crisler^**, J. S. Hoftun^††, T. Y. Ling, T. A. Romanowski, and J. T. Volk^‡‡

Ohio State University, Columbus, Ohio 43210

^*Present address: General Electric Lighting Systems, Nela Park, Cleveland, OH 44112.
^†Present address: Physics Department, University of Rochester, Rochester, NY 14627.
^‡Present address: Physics Department, Ohio State University, Columbus, OH 43210.
^§Present address: Physics Department, Northwestern University, Evanston, IL 60201.
^∥Present address: Bell Labs, Naperville, IL 60510.
^¶Present address: Physics Department, University of California (Berkeley), Berkeley, CA 94720.
^**Present address: Fermilab, Batavia, IL 60510.
^††Present address: Physics Department, Brown University, Providence, RI 02912.
^‡‡Present address: Physics Department, University of California (Davis), Davis, CA 95616.