Production of direct photons and neutral mesons at large transverse momenta by π- and p beams at 500 GeV/c

G. Alverson, W. F. Baker, G. Ballocchi, R. Benson, D. Berg, S. Blusk, C. Bromberg, D. Brown, D. Carey, T. Chand, C. Chandlee, B. C. Choudhary, W. H. Chung, L. De Barbaro, W. DeSoi, W. Dlugosz, J. Dunlea, S. Easo, E. Engels, W. FaisslerG. Fanourakis, T. Ferbel, D. Garelick, G. Ginther, G. Glass, M. Glaubman, P. Gutierrez, K. Hartman, J. Huston, C. Johnstone, V. Kapoor, I. Kourbanis, A. Lanaro, C. Lirakis, F. Lobkowicz, P. Lukens, S. Mani, A. Maul, J. Mansour, R. Miller, C. A. Nelson, B. Y. Oh, D. Orris, E. Pothier, E. Prebys, B. M. Rajaram, R. Roser, K. Ruddick, P. Shepard, R. K. Shivpuri, A. Sinanidis, D. Skow, P. Slattery, L. Sorrell, W. Toothacker, N. Varelas, D. Weerasundara, J. Whitmore, G. Wu, T. Yasuda, C. Yosef, M. Zieliński

Research output: Contribution to journalArticle

46 Scopus citations

Abstract

We present results from the initial run of Fermilab experiment E706. The data include incident π- and p beams at 500 GeV/c on Be and Cu targets, and span the kinematic ranges of transverse momentum and rapidity of 3.5≤pT≤10 GeV/c and -0.7≤yc.m.≤0.7, respectively. We have measured cross sections for π0 and direct-photon production, as well as the ηπ0 production ratio. From the data on Be and Cu, we have extracted the nuclear dependence of π0 production, parametrized as Aα. The cross sections are compared with next-to-leading-log QCD predictions for different choices of the QCD momentum scales and several sets of parton distribution functions.

Original languageEnglish (US)
Pages (from-to)5-28
Number of pages24
JournalPhysical Review D
Volume48
Issue number1
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Alverson, G., Baker, W. F., Ballocchi, G., Benson, R., Berg, D., Blusk, S., Bromberg, C., Brown, D., Carey, D., Chand, T., Chandlee, C., Choudhary, B. C., Chung, W. H., De Barbaro, L., DeSoi, W., Dlugosz, W., Dunlea, J., Easo, S., Engels, E., ... Zieliński, M. (1993). Production of direct photons and neutral mesons at large transverse momenta by π- and p beams at 500 GeV/c. Physical Review D, 48(1), 5-28. https://doi.org/10.1103/PhysRevD.48.5