Inclusive π 0 Production in pp Collisions at 50-400 GeV/ c
1974; American Physical Society; Volume: 33; Issue: 5 Linguagem: Inglês
10.1103/physrevlett.33.327
ISSN1092-0145
AutoresDavid C. Carey, J. R. Johnson, R. Kammerud, M. Peters, David J. Ritchie, A. Roberts, J.R. Sauer, Robert E. Shafer, D. Theriot, J. K. Walker, F. Ë. Taylor,
Tópico(s)Nuclear physics research studies
ResumoWe have measured the single-photon cross section in the reaction $p+p\ensuremath{\rightarrow}\ensuremath{\gamma}+\mathrm{anything}$ for incident proton momenta from 50 to 400 GeV/c and lab angles of 80, 100, and 120 mrad. It is shown that in the range ${p}_{\ensuremath{\perp}}=0.3 \mathrm{to} 4.3$ GeV/c, the derived ${\ensuremath{\pi}}^{0}$ invariant cross section can be factorized into a product of two functions, one in ${p}_{\ensuremath{\perp}}$ and the other in a new scaling variable ${x}_{R}=\frac{{p}^{*}}{{{p}_{max}}^{*}}$, where ${p}^{*}$ is the total c.m. momentum of the ${\ensuremath{\pi}}^{0}$.
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